Domain block (#76)

* start work on admin domain blocking

* move stuff around + further work on domain blocks

* move + restructure processor

* prep work for deleting account

* tidy

* go fmt

* formatting

* domain blocking more work

* check domain blocks way earlier on

* progress on delete account

* delete more stuff when an account is gone

* and more...

* domain blocky block block

* get individual domain block, delete a block

internal/api/client/account/accountupdate_test.go

@@ -53,7 +53,7 @@ func (suite *AccountUpdateTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.accountModule = account.New(suite.config, suite.processor, suite.log).(*account.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/account/statuses.go

@@ -82,7 +82,7 @@ func (m *Module) AccountStatusesGETHandler(c *gin.Context) {
 		maxID = maxIDString
 	}
 
-	pinned := false
+	pinnedOnly := false
 	pinnedString := c.Query(PinnedKey)
 	if pinnedString != "" {
 		i, err := strconv.ParseBool(pinnedString)
@@ -91,7 +91,7 @@ func (m *Module) AccountStatusesGETHandler(c *gin.Context) {
 			c.JSON(http.StatusBadRequest, gin.H{"error": "couldn't parse pinned query param"})
 			return
 		}
-		pinned = i
+		pinnedOnly = i
 	}
 
 	mediaOnly := false
@@ -106,7 +106,7 @@ func (m *Module) AccountStatusesGETHandler(c *gin.Context) {
 		mediaOnly = i
 	}
 
-	statuses, errWithCode := m.processor.AccountStatusesGet(authed, targetAcctID, limit, excludeReplies, maxID, pinned, mediaOnly)
+	statuses, errWithCode := m.processor.AccountStatusesGet(authed, targetAcctID, limit, excludeReplies, maxID, pinnedOnly, mediaOnly)
 	if errWithCode != nil {
 		l.Debugf("error from processor account statuses get: %s", errWithCode)
 		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})

internal/api/client/admin/admin.go

@@ -29,10 +29,19 @@
 )
 
 const (
-	// BasePath is the base API path for this module
+	// BasePath is the base API path for this module.
 	BasePath = "/api/v1/admin"
-	// EmojiPath is used for posting/deleting custom emojis
+	// EmojiPath is used for posting/deleting custom emojis.
 	EmojiPath = BasePath + "/custom_emojis"
+	// DomainBlocksPath is used for posting domain blocks.
+	DomainBlocksPath = BasePath + "/domain_blocks"
+	// DomainBlockPath is used for interacting with a single domain block.
+	DomainBlockPath = DomainBlocksPath + "/:" + IDKey
+
+	// ExportQueryKey is for requesting a public export of some data.
+	ExportQueryKey = "export"
+	// IDKey specifies the ID of a single item being interacted with.
+	IDKey = "id"
 )
 
 // Module implements the ClientAPIModule interface for admin-related actions (reports, emojis, etc)
@@ -54,5 +63,9 @@ func New(config *config.Config, processor processing.Processor, log *logrus.Logg
 // Route attaches all routes from this module to the given router
 func (m *Module) Route(r router.Router) error {
 	r.AttachHandler(http.MethodPost, EmojiPath, m.emojiCreatePOSTHandler)
+	r.AttachHandler(http.MethodPost, DomainBlocksPath, m.DomainBlocksPOSTHandler)
+	r.AttachHandler(http.MethodGet, DomainBlocksPath, m.DomainBlocksGETHandler)
+	r.AttachHandler(http.MethodGet, DomainBlockPath, m.DomainBlockGETHandler)
+	r.AttachHandler(http.MethodDelete, DomainBlockPath, m.DomainBlockDELETEHandler)
 	return nil
 }

internal/api/client/admin/domainblockcreate.go

@@ -0,0 +1,70 @@
+package admin
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// DomainBlocksPOSTHandler deals with the creation of a new domain block.
+func (m *Module) DomainBlocksPOSTHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "DomainBlocksPOSTHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+
+	// make sure we're authed with an admin account
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	if !authed.User.Admin {
+		l.Debugf("user %s not an admin", authed.User.ID)
+		c.JSON(http.StatusForbidden, gin.H{"error": "not an admin"})
+		return
+	}
+
+	// extract the media create form from the request context
+	l.Tracef("parsing request form: %+v", c.Request.Form)
+	form := &model.DomainBlockCreateRequest{}
+	if err := c.ShouldBind(form); err != nil {
+		l.Debugf("error parsing form %+v: %s", c.Request.Form, err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": fmt.Sprintf("could not parse form: %s", err)})
+		return
+	}
+
+	// Give the fields on the request form a first pass to make sure the request is superficially valid.
+	l.Tracef("validating form %+v", form)
+	if err := validateCreateDomainBlock(form); err != nil {
+		l.Debugf("error validating form: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	domainBlock, err := m.processor.AdminDomainBlockCreate(authed, form)
+	if err != nil {
+		l.Debugf("error creating domain block: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, domainBlock)
+}
+
+func validateCreateDomainBlock(form *model.DomainBlockCreateRequest) error {
+	// add some more validation here later if necessary
+	if form.Domain == "" {
+		return errors.New("empty domain provided")
+	}
+
+	return nil
+}

internal/api/client/admin/domainblockdelete.go

@@ -0,0 +1,47 @@
+package admin
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// DomainBlockDELETEHandler deals with the delete of an existing domain block.
+func (m *Module) DomainBlockDELETEHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "DomainBlockDELETEHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+
+	// make sure we're authed with an admin account
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	if !authed.User.Admin {
+		l.Debugf("user %s not an admin", authed.User.ID)
+		c.JSON(http.StatusForbidden, gin.H{"error": "not an admin"})
+		return
+	}
+
+	domainBlockID := c.Param(IDKey)
+	if domainBlockID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no domain block id provided"})
+		return
+	}
+
+	domainBlock, errWithCode := m.processor.AdminDomainBlockDelete(authed, domainBlockID)
+	if errWithCode != nil {
+		l.Debugf("error deleting domain block: %s", errWithCode.Error())
+		c.JSON(errWithCode.Code(), gin.H{"error": errWithCode.Safe()})
+		return
+	}
+
+	c.JSON(http.StatusOK, domainBlock)
+}

internal/api/client/admin/domainblockget.go

@@ -0,0 +1,60 @@
+package admin
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// DomainBlockGETHandler returns one existing domain block, identified by its id.
+func (m *Module) DomainBlockGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "DomainBlockGETHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+
+	// make sure we're authed with an admin account
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	if !authed.User.Admin {
+		l.Debugf("user %s not an admin", authed.User.ID)
+		c.JSON(http.StatusForbidden, gin.H{"error": "not an admin"})
+		return
+	}
+
+	domainBlockID := c.Param(IDKey)
+	if domainBlockID == "" {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "no domain block id provided"})
+		return
+	}
+
+	export := false
+	exportString := c.Query(ExportQueryKey)
+	if exportString != "" {
+		i, err := strconv.ParseBool(exportString)
+		if err != nil {
+			l.Debugf("error parsing export string: %s", err)
+			c.JSON(http.StatusBadRequest, gin.H{"error": "couldn't parse export query param"})
+			return
+		}
+		export = i
+	}
+
+	domainBlock, err := m.processor.AdminDomainBlockGet(authed, domainBlockID, export)
+	if err != nil {
+		l.Debugf("error getting domain block: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, domainBlock)
+}

internal/api/client/admin/domainblocksget.go

@@ -0,0 +1,54 @@
+package admin
+
+import (
+	"net/http"
+	"strconv"
+
+	"github.com/gin-gonic/gin"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// DomainBlocksGETHandler returns a list of all existing domain blocks.
+func (m *Module) DomainBlocksGETHandler(c *gin.Context) {
+	l := m.log.WithFields(logrus.Fields{
+		"func":        "DomainBlocksGETHandler",
+		"request_uri": c.Request.RequestURI,
+		"user_agent":  c.Request.UserAgent(),
+		"origin_ip":   c.ClientIP(),
+	})
+
+	// make sure we're authed with an admin account
+	authed, err := oauth.Authed(c, true, true, true, true)
+	if err != nil {
+		l.Debugf("couldn't auth: %s", err)
+		c.JSON(http.StatusForbidden, gin.H{"error": err.Error()})
+		return
+	}
+	if !authed.User.Admin {
+		l.Debugf("user %s not an admin", authed.User.ID)
+		c.JSON(http.StatusForbidden, gin.H{"error": "not an admin"})
+		return
+	}
+
+	export := false
+	exportString := c.Query(ExportQueryKey)
+	if exportString != "" {
+		i, err := strconv.ParseBool(exportString)
+		if err != nil {
+			l.Debugf("error parsing export string: %s", err)
+			c.JSON(http.StatusBadRequest, gin.H{"error": "couldn't parse export query param"})
+			return
+		}
+		export = i
+	}
+
+	domainBlocks, err := m.processor.AdminDomainBlocksGet(authed, export)
+	if err != nil {
+		l.Debugf("error getting domain blocks: %s", err)
+		c.JSON(http.StatusBadRequest, gin.H{"error": err.Error()})
+		return
+	}
+
+	c.JSON(http.StatusOK, domainBlocks)
+}

internal/api/client/fileserver/servefile_test.go

@@ -78,7 +78,7 @@ func (suite *ServeFileTestSuite) SetupSuite() {
 	suite.db = testrig.NewTestDB()
 	suite.log = testrig.NewTestLog()
 	suite.storage = testrig.NewTestStorage()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.tc = testrig.NewTestTypeConverter(suite.db)
 	suite.mediaHandler = testrig.NewTestMediaHandler(suite.db, suite.storage)

internal/api/client/instance/instancepatch.go

@@ -8,6 +8,7 @@
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 )
 
+// InstanceUpdatePATCHHandler allows an admin to update the instance information served at /api/v1/instance
 func (m *Module) InstanceUpdatePATCHHandler(c *gin.Context) {
 	l := m.log.WithField("func", "InstanceUpdatePATCHHandler")
 	authed, err := oauth.Authed(c, true, true, true, true)

internal/api/client/media/mediacreate_test.go

@@ -84,7 +84,7 @@ func (suite *MediaCreateTestSuite) SetupSuite() {
 	suite.tc = testrig.NewTestTypeConverter(suite.db)
 	suite.mediaHandler = testrig.NewTestMediaHandler(suite.db, suite.storage)
 	suite.oauthServer = testrig.NewTestOauthServer(suite.db)
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 
 	// setup module being tested

internal/api/client/status/statusboost_test.go

@@ -52,7 +52,7 @@ func (suite *StatusBoostTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/status/statuscreate_test.go

@@ -57,7 +57,7 @@ func (suite *StatusCreateTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/status/statusfave_test.go

@@ -55,7 +55,7 @@ func (suite *StatusFaveTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/status/statusfavedby_test.go

@@ -55,7 +55,7 @@ func (suite *StatusFavedByTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/status/statusget_test.go

@@ -45,7 +45,7 @@ func (suite *StatusGetTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/client/status/statusunfave_test.go

@@ -55,7 +55,7 @@ func (suite *StatusUnfaveTestSuite) SetupTest() {
 	suite.db = testrig.NewTestDB()
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.statusModule = status.New(suite.config, suite.processor, suite.log).(*status.Module)
 	testrig.StandardDBSetup(suite.db)

internal/api/model/domainblock.go

@@ -0,0 +1,43 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package model
+
+// DomainBlock represents a block on one domain
+type DomainBlock struct {
+	ID             string `json:"id,omitempty"`
+	Domain         string `json:"domain"`
+	Obfuscate      bool   `json:"obfuscate,omitempty"`
+	PrivateComment string `json:"private_comment,omitempty"`
+	PublicComment  string `json:"public_comment,omitempty"`
+	SubscriptionID string `json:"subscription_id,omitempty"`
+	CreatedBy      string `json:"created_by,omitempty"`
+	CreatedAt      string `json:"created_at,omitempty"`
+}
+
+// DomainBlockCreateRequest is the form submitted as a POST to /api/v1/admin/domain_blocks to create a new block.
+type DomainBlockCreateRequest struct {
+	// hostname/domain to block
+	Domain string `form:"domain" json:"domain" xml:"domain" validation:"required"`
+	// whether the domain should be obfuscated when being displayed publicly
+	Obfuscate bool `form:"obfuscate" json:"obfuscate" xml:"obfuscate"`
+	// private comment for other admins on why the domain was blocked
+	PrivateComment string `form:"private_comment" json:"private_comment" xml:"private_comment"`
+	// public comment on the reason for the domain block
+	PublicComment string `form:"public_comment" json:"public_comment" xml:"public_comment"`
+}

internal/api/s2s/user/followers.go

@@ -19,10 +19,12 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // FollowersGETHandler returns a collection of URIs for followers of the target user, formatted so that other AP servers can understand it.
@@ -46,9 +48,14 @@ func (m *Module) FollowersGETHandler(c *gin.Context) {
 	}
 	l.Tracef("negotiated format: %s", format)
 
-	// make a copy of the context to pass along so we don't break anything
-	cp := c.Copy()
-	user, err := m.processor.GetFediFollowers(requestedUsername, cp.Request) // GetFediUser handles auth as well
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	user, err := m.processor.GetFediFollowers(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
 	if err != nil {
 		l.Info(err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/s2s/user/following.go

@@ -19,10 +19,12 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // FollowingGETHandler returns a collection of URIs for accounts that the target user follows, formatted so that other AP servers can understand it.
@@ -46,9 +48,14 @@ func (m *Module) FollowingGETHandler(c *gin.Context) {
 	}
 	l.Tracef("negotiated format: %s", format)
 
-	// make a copy of the context to pass along so we don't break anything
-	cp := c.Copy()
-	user, err := m.processor.GetFediFollowing(requestedUsername, cp.Request) // handles auth as well
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	user, err := m.processor.GetFediFollowing(ctx, requestedUsername, c.Request.URL) // handles auth as well
 	if err != nil {
 		l.Info(err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/s2s/user/inboxpost.go

@@ -19,11 +19,13 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // InboxPOSTHandler deals with incoming POST requests to an actor's inbox.
@@ -40,7 +42,14 @@ func (m *Module) InboxPOSTHandler(c *gin.Context) {
 		return
 	}
 
-	posted, err := m.processor.InboxPost(c.Request.Context(), c.Writer, c.Request)
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	posted, err := m.processor.InboxPost(ctx, c.Writer, c.Request)
 	if err != nil {
 		if withCode, ok := err.(gtserror.WithCode); ok {
 			l.Debug(withCode.Error())

internal/api/s2s/user/publickeyget.go

@@ -1,10 +1,12 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // PublicKeyGETHandler should be served at eg https://example.org/users/:username/main-key.
@@ -32,9 +34,14 @@ func (m *Module) PublicKeyGETHandler(c *gin.Context) {
 	}
 	l.Tracef("negotiated format: %s", format)
 
-	// make a copy of the context to pass along so we don't break anything
-	cp := c.Copy()
-	user, err := m.processor.GetFediUser(requestedUsername, cp.Request) // GetFediUser handles auth as well
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	user, err := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
 	if err != nil {
 		l.Info(err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/s2s/user/statusget.go

@@ -1,10 +1,12 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // StatusGETHandler serves the target status as an activitystreams NOTE so that other AP servers can parse it.
@@ -34,9 +36,14 @@ func (m *Module) StatusGETHandler(c *gin.Context) {
 	}
 	l.Tracef("negotiated format: %s", format)
 
-	// make a copy of the context to pass along so we don't break anything
-	cp := c.Copy()
-	status, err := m.processor.GetFediStatus(requestedUsername, requestedStatusID, cp.Request) // handles auth as well
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	status, err := m.processor.GetFediStatus(ctx, requestedUsername, requestedStatusID, c.Request.URL) // handles auth as well
 	if err != nil {
 		l.Info(err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/s2s/user/userget.go

@@ -19,10 +19,12 @@
 package user
 
 import (
+	"context"
 	"net/http"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // UsersGETHandler should be served at https://example.org/users/:username.
@@ -54,9 +56,14 @@ func (m *Module) UsersGETHandler(c *gin.Context) {
 	}
 	l.Tracef("negotiated format: %s", format)
 
-	// make a copy of the context to pass along so we don't break anything
-	cp := c.Copy()
-	user, err := m.processor.GetFediUser(requestedUsername, cp.Request) // GetFediUser handles auth as well
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	user, err := m.processor.GetFediUser(ctx, requestedUsername, c.Request.URL) // GetFediUser handles auth as well
 	if err != nil {
 		l.Info(err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/s2s/user/userget_test.go

@@ -42,7 +42,7 @@ func (suite *UserGetTestSuite) SetupTest() {
 	suite.tc = testrig.NewTestTypeConverter(suite.db)
 	suite.storage = testrig.NewTestStorage()
 	suite.log = testrig.NewTestLog()
-	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)))
+	suite.federator = testrig.NewTestFederator(suite.db, testrig.NewTestTransportController(testrig.NewMockHTTPClient(nil)), suite.storage)
 	suite.processor = testrig.NewTestProcessor(suite.db, suite.storage, suite.federator)
 	suite.userModule = user.New(suite.config, suite.processor, suite.log).(*user.Module)
 	testrig.StandardDBSetup(suite.db)
@@ -98,7 +98,7 @@ func (suite *UserGetTestSuite) TestGetUser() {
 		}, nil
 	}))
 	// get this transport controller embedded right in the user module we're testing
-	federator := testrig.NewTestFederator(suite.db, tc)
+	federator := testrig.NewTestFederator(suite.db, tc, suite.storage)
 	processor := testrig.NewTestProcessor(suite.db, suite.storage, federator)
 	userModule := user.New(suite.config, processor, suite.log).(*user.Module)
 

internal/api/s2s/webfinger/webfingerget.go

@@ -19,12 +19,14 @@
 package webfinger
 
 import (
+	"context"
 	"fmt"
 	"net/http"
 	"strings"
 
 	"github.com/gin-gonic/gin"
 	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 // WebfingerGETRequest handles requests to, for example, https://example.org/.well-known/webfinger?resource=acct:some_user@example.org
@@ -68,7 +70,14 @@ func (m *Module) WebfingerGETRequest(c *gin.Context) {
 		return
 	}
 
-	resp, err := m.processor.GetWebfingerAccount(username, c.Request)
+	// transfer the signature verifier from the gin context to the request context
+	ctx := c.Request.Context()
+	verifier, signed := c.Get(string(util.APRequestingPublicKeyVerifier))
+	if signed {
+		ctx = context.WithValue(ctx, util.APRequestingPublicKeyVerifier, verifier)
+	}
+
+	resp, err := m.processor.GetWebfingerAccount(ctx, username, c.Request.URL)
 	if err != nil {
 		l.Debugf("aborting request with an error: %s", err.Error())
 		c.JSON(err.Code(), gin.H{"error": err.Safe()})

internal/api/security/security.go

@@ -24,6 +24,7 @@
 	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/api"
 	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/router"
 )
 
@@ -33,18 +34,21 @@
 type Module struct {
 	config *config.Config
 	log    *logrus.Logger
+	db     db.DB
 }
 
 // New returns a new security module
-func New(config *config.Config, log *logrus.Logger) api.ClientModule {
+func New(config *config.Config, db db.DB, log *logrus.Logger) api.ClientModule {
 	return &Module{
 		config: config,
 		log:    log,
+		db:     db,
 	}
 }
 
 // Route attaches security middleware to the given router
 func (m *Module) Route(s router.Router) error {
+	s.AttachMiddleware(m.SignatureCheck)
 	s.AttachMiddleware(m.FlocBlock)
 	s.AttachMiddleware(m.ExtraHeaders)
 	s.AttachMiddleware(m.UserAgentBlock)

internal/api/security/signaturecheck.go

@@ -0,0 +1,69 @@
+package security
+
+import (
+	"net/http"
+	"net/url"
+
+	"github.com/gin-gonic/gin"
+	"github.com/go-fed/httpsig"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+// SignatureCheck checks whether an incoming http request has been signed. If so, it will check if the domain
+// that signed the request is permitted to access the server. If it is permitted, the handler will set the key
+// verifier in the gin context for use down the line.
+func (m *Module) SignatureCheck(c *gin.Context) {
+	l := m.log.WithField("func", "DomainBlockChecker")
+
+	// set this extra field for signature validation
+	c.Request.Header.Set("host", m.config.Host)
+
+	// create the verifier from the request
+	// if the request is signed, it will have a signature header
+	verifier, err := httpsig.NewVerifier(c.Request)
+	if err == nil {
+		// the request was signed!
+
+		// The key ID should be given in the signature so that we know where to fetch it from the remote server.
+		// This will be something like https://example.org/users/whatever_requesting_user#main-key
+		requestingPublicKeyID, err := url.Parse(verifier.KeyId())
+		if err == nil && requestingPublicKeyID != nil {
+			// we managed to parse the url!
+
+			// if the domain is blocked we want to bail as early as possible
+			blockedDomain, err := m.blockedDomain(requestingPublicKeyID.Host)
+			if err != nil {
+				l.Errorf("could not tell if domain %s was blocked or not: %s", requestingPublicKeyID.Host, err)
+				c.AbortWithStatus(http.StatusInternalServerError)
+				return
+			}
+			if blockedDomain {
+				l.Infof("domain %s is blocked", requestingPublicKeyID.Host)
+				c.AbortWithStatus(http.StatusForbidden)
+				return
+			}
+
+			// set the verifier on the context here to save some work further down the line
+			c.Set(string(util.APRequestingPublicKeyVerifier), verifier)
+		}
+	}
+}
+
+func (m *Module) blockedDomain(host string) (bool, error) {
+	b := &gtsmodel.DomainBlock{}
+	err := m.db.GetWhere([]db.Where{{Key: "domain", Value: host, CaseInsensitive: true}}, b)
+	if err == nil {
+		// block exists
+		return true, nil
+	}
+
+	if _, ok := err.(db.ErrNoEntries); ok {
+		// there are no entries so there's no block
+		return false, nil
+	}
+
+	// there's an actual error
+	return false, err
+}

internal/cliactions/server/server.go

@@ -112,7 +112,7 @@
 	mediaHandler := media.New(c, dbService, storageBackend, log)
 	oauthServer := oauth.New(dbService, log)
 	transportController := transport.NewController(c, &federation.Clock{}, http.DefaultClient, log)
-	federator := federation.NewFederator(dbService, federatingDB, transportController, c, log, typeConverter)
+	federator := federation.NewFederator(dbService, federatingDB, transportController, c, log, typeConverter, mediaHandler)
 	processor := processing.NewProcessor(c, typeConverter, federator, oauthServer, mediaHandler, storageBackend, timelineManager, dbService, log)
 	if err := processor.Start(); err != nil {
 		return fmt.Errorf("error starting processor: %s", err)
@@ -138,7 +138,7 @@
 	fileServerModule := fileserver.New(c, processor, log)
 	adminModule := admin.New(c, processor, log)
 	statusModule := status.New(c, processor, log)
-	securityModule := security.New(c, log)
+	securityModule := security.New(c, dbService, log)
 	streamingModule := streaming.New(c, processor, log)
 
 	apis := []api.ClientModule{

internal/cliactions/testrig/testrig.go

@@ -57,7 +57,7 @@
 			Body:       r,
 		}, nil
 	}))
-	federator := testrig.NewTestFederator(dbService, transportController)
+	federator := testrig.NewTestFederator(dbService, transportController, storageBackend)
 
 	processor := testrig.NewTestProcessor(dbService, storageBackend, federator)
 	if err := processor.Start(); err != nil {
@@ -84,7 +84,7 @@
 	fileServerModule := fileserver.New(c, processor, log)
 	adminModule := admin.New(c, processor, log)
 	statusModule := status.New(c, processor, log)
-	securityModule := security.New(c, log)
+	securityModule := security.New(c, dbService, log)
 	streamingModule := streaming.New(c, processor, log)
 
 	apis := []api.ClientModule{

internal/db/db.go

@@ -65,11 +65,6 @@ type DB interface {
 	// In case of no entries, a 'no entries' error will be returned
 	GetWhere(where []Where, i interface{}) error
 
-	// // GetWhereMany gets one entry where key = value for *ALL* parameters passed as "where".
-	// // That is, if you pass 2 'where' entries, with 1 being Key username and Value test, and the second
-	// // being Key domain and Value example.org, only entries will be returned where BOTH conditions are true.
-	// GetWhereMany(i interface{}, where ...model.Where) error
-
 	// GetAll will try to get all entries of type i.
 	// The given interface i will be set to the result of the query, whatever it is. Use a pointer or a slice.
 	// In case of no entries, a 'no entries' error will be returned
@@ -155,11 +150,11 @@ type DB interface {
 	// CountStatusesByAccountID is a shortcut for the common action of counting statuses produced by accountID.
 	CountStatusesByAccountID(accountID string) (int, error)
 
-	// GetStatusesByTimeDescending is a shortcut for getting the most recent statuses. accountID is optional, if not provided
+	// GetStatusesForAccount is a shortcut for getting the most recent statuses. accountID is optional, if not provided
 	// then all statuses will be returned. If limit is set to 0, the size of the returned slice will not be limited. This can
 	// be very memory intensive so you probably shouldn't do this!
 	// In case of no entries, a 'no entries' error will be returned
-	GetStatusesByTimeDescending(accountID string, statuses *[]gtsmodel.Status, limit int, excludeReplies bool, maxID string, pinned bool, mediaOnly bool) error
+	GetStatusesForAccount(accountID string, limit int, excludeReplies bool, maxID string, pinnedOnly bool, mediaOnly bool) ([]*gtsmodel.Status, error)
 
 	// GetLastStatusForAccountID simply gets the most recent status by the given account.
 	// The given slice 'status' pointer will be set to the result of the query, whatever it is.
@@ -261,6 +256,10 @@ type DB interface {
 
 	// GetDomainCountForInstance returns the number of known instances known that the given domain federates with.
 	GetDomainCountForInstance(domain string) (int, error)
+
+	// GetAccountsForInstance returns a slice of accounts from the given instance, arranged by ID.
+	GetAccountsForInstance(domain string, maxID string, limit int) ([]*gtsmodel.Account, error)
+
 	/*
 		USEFUL CONVERSION FUNCTIONS
 	*/

internal/db/pg/instance.go

@@ -2,6 +2,7 @@
 
 import (
 	"github.com/go-pg/pg/v10"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
@@ -50,3 +51,33 @@ func (ps *postgresService) GetDomainCountForInstance(domain string) (int, error)
 
 	return q.Count()
 }
+
+func (ps *postgresService) GetAccountsForInstance(domain string, maxID string, limit int) ([]*gtsmodel.Account, error) {
+	ps.log.Debug("GetAccountsForInstance")
+
+	accounts := []*gtsmodel.Account{}
+
+	q := ps.conn.Model(&accounts).Where("domain = ?", domain).Order("id DESC")
+
+	if maxID != "" {
+		q = q.Where("id < ?", maxID)
+	}
+
+	if limit > 0 {
+		q = q.Limit(limit)
+	}
+
+	err := q.Select()
+	if err != nil {
+		if err == pg.ErrNoRows {
+			return nil, db.ErrNoEntries{}
+		}
+		return nil, err
+	}
+
+	if len(accounts) == 0 {
+		return nil, db.ErrNoEntries{}
+	}
+
+	return accounts, nil
+}

internal/db/pg/pg.go

@@ -511,39 +511,50 @@ func (ps *postgresService) CountStatusesByAccountID(accountID string) (int, erro
 	return count, nil
 }
 
-func (ps *postgresService) GetStatusesByTimeDescending(accountID string, statuses *[]gtsmodel.Status, limit int, excludeReplies bool, maxID string, pinned bool, mediaOnly bool) error {
-	q := ps.conn.Model(statuses).Order("created_at DESC")
+func (ps *postgresService) GetStatusesForAccount(accountID string, limit int, excludeReplies bool, maxID string, pinnedOnly bool, mediaOnly bool) ([]*gtsmodel.Status, error) {
+	ps.log.Debugf("getting statuses for account %s", accountID)
+	statuses := []*gtsmodel.Status{}
+
+	q := ps.conn.Model(&statuses).Order("id DESC")
 	if accountID != "" {
 		q = q.Where("account_id = ?", accountID)
 	}
+
 	if limit != 0 {
 		q = q.Limit(limit)
 	}
+
 	if excludeReplies {
 		q = q.Where("? IS NULL", pg.Ident("in_reply_to_id"))
 	}
-	if pinned {
+
+	if pinnedOnly {
 		q = q.Where("pinned = ?", true)
 	}
+
 	if mediaOnly {
 		q = q.WhereGroup(func(q *pg.Query) (*pg.Query, error) {
 			return q.Where("? IS NOT NULL", pg.Ident("attachments")).Where("attachments != '{}'"), nil
 		})
 	}
+
 	if maxID != "" {
-		s := &gtsmodel.Status{}
-		if err := ps.conn.Model(s).Where("id = ?", maxID).Select(); err != nil {
-			return err
-		}
-		q = q.Where("status.created_at < ?", s.CreatedAt)
+		q = q.Where("id < ?", maxID)
 	}
+
 	if err := q.Select(); err != nil {
 		if err == pg.ErrNoRows {
-			return db.ErrNoEntries{}
+			return nil, db.ErrNoEntries{}
 		}
-		return err
+		return nil, err
 	}
-	return nil
+
+	if len(statuses) == 0 {
+		return nil, db.ErrNoEntries{}
+	}
+
+	ps.log.Debugf("returning statuses for account %s", accountID)
+	return statuses, nil
 }
 
 func (ps *postgresService) GetLastStatusForAccountID(accountID string, status *gtsmodel.Status) error {

internal/federation/authenticate.go

@@ -25,7 +25,6 @@
 	"encoding/pem"
 	"errors"
 	"fmt"
-	"net/http"
 	"net/url"
 	"strings"
 
@@ -35,6 +34,7 @@
 	"github.com/go-fed/httpsig"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
 /*
@@ -115,34 +115,30 @@ func getPublicKeyFromResponse(c context.Context, b []byte, keyID *url.URL) (voca
 //
 // Also note that this function *does not* dereference the remote account that the signature key is associated with.
 // Other functions should use the returned URL to dereference the remote account, if required.
-func (f *federator) AuthenticateFederatedRequest(requestedUsername string, r *http.Request) (*url.URL, error) {
+func (f *federator) AuthenticateFederatedRequest(ctx context.Context, requestedUsername string) (*url.URL, bool, error) {
+	l := f.log.WithField("func", "AuthenticateFederatedRequest")
 
 	var publicKey interface{}
 	var pkOwnerURI *url.URL
 	var err error
 
-	// set this extra field for signature validation
-	r.Header.Set("host", f.config.Host)
-
-	verifier, err := httpsig.NewVerifier(r)
-	if err != nil {
-		return nil, fmt.Errorf("could not create http sig verifier: %s", err)
+	// thanks to signaturecheck.go in the security package, we should already have a signature verifier set on the context
+	vi := ctx.Value(util.APRequestingPublicKeyVerifier)
+	if vi == nil {
+		l.Debug("request wasn't signed")
+		return nil, false, nil // request wasn't signed
+	}
+
+	verifier, ok := vi.(httpsig.Verifier)
+	if !ok {
+		l.Debug("couldn't extract sig verifier")
+		return nil, false, nil // couldn't extract the verifier
 	}
 
-	// The key ID should be given in the signature so that we know where to fetch it from the remote server.
-	// This will be something like https://example.org/users/whatever_requesting_user#main-key
 	requestingPublicKeyID, err := url.Parse(verifier.KeyId())
 	if err != nil {
-		return nil, fmt.Errorf("could not parse key id into a url: %s", err)
-	}
-
-	// if the domain is blocked we want to make as few calls towards it as possible, so already bail here if that's the case!
-	blockedDomain, err := f.blockedDomain(requestingPublicKeyID.Host)
-	if err != nil {
-		return nil, fmt.Errorf("could not tell if domain %s was blocked or not: %s", requestingPublicKeyID.Host, err)
-	}
-	if blockedDomain {
-		return nil, fmt.Errorf("host %s was domain blocked, aborting auth", requestingPublicKeyID.Host)
+		l.Debug("couldn't parse public key URL")
+		return nil, false, nil // couldn't parse the public key ID url
 	}
 
 	requestingRemoteAccount := &gtsmodel.Account{}
@@ -152,12 +148,12 @@ func (f *federator) AuthenticateFederatedRequest(requestedUsername string, r *ht
 		// LOCAL ACCOUNT REQUEST
 		// the request is coming from INSIDE THE HOUSE so skip the remote dereferencing
 		if err := f.db.GetWhere([]db.Where{{Key: "public_key_uri", Value: requestingPublicKeyID.String()}}, requestingLocalAccount); err != nil {
-			return nil, fmt.Errorf("couldn't get local account with public key uri %s from the database: %s", requestingPublicKeyID.String(), err)
+			return nil, false, fmt.Errorf("couldn't get local account with public key uri %s from the database: %s", requestingPublicKeyID.String(), err)
 		}
 		publicKey = requestingLocalAccount.PublicKey
 		pkOwnerURI, err = url.Parse(requestingLocalAccount.URI)
 		if err != nil {
-			return nil, fmt.Errorf("error parsing url %s: %s", requestingLocalAccount.URI, err)
+			return nil, false, fmt.Errorf("error parsing url %s: %s", requestingLocalAccount.URI, err)
 		}
 	} else if err := f.db.GetWhere([]db.Where{{Key: "public_key_uri", Value: requestingPublicKeyID.String()}}, requestingRemoteAccount); err == nil {
 		// REMOTE ACCOUNT REQUEST WITH KEY CACHED LOCALLY
@@ -165,7 +161,7 @@ func (f *federator) AuthenticateFederatedRequest(requestedUsername string, r *ht
 		publicKey = requestingRemoteAccount.PublicKey
 		pkOwnerURI, err = url.Parse(requestingRemoteAccount.URI)
 		if err != nil {
-			return nil, fmt.Errorf("error parsing url %s: %s", requestingRemoteAccount.URI, err)
+			return nil, false, fmt.Errorf("error parsing url %s: %s", requestingRemoteAccount.URI, err)
 		}
 	} else {
 		// REMOTE ACCOUNT REQUEST WITHOUT KEY CACHED LOCALLY
@@ -173,72 +169,55 @@ func (f *federator) AuthenticateFederatedRequest(requestedUsername string, r *ht
 		// so we need to authenticate the request properly by dereferencing the remote key
 		transport, err := f.GetTransportForUser(requestedUsername)
 		if err != nil {
-			return nil, fmt.Errorf("transport err: %s", err)
+			return nil, false, fmt.Errorf("transport err: %s", err)
 		}
 
 		// The actual http call to the remote server is made right here in the Dereference function.
 		b, err := transport.Dereference(context.Background(), requestingPublicKeyID)
 		if err != nil {
-			return nil, fmt.Errorf("error deferencing key %s: %s", requestingPublicKeyID.String(), err)
+			return nil, false, fmt.Errorf("error deferencing key %s: %s", requestingPublicKeyID.String(), err)
 		}
 
 		// if the key isn't in the response, we can't authenticate the request
 		requestingPublicKey, err := getPublicKeyFromResponse(context.Background(), b, requestingPublicKeyID)
 		if err != nil {
-			return nil, fmt.Errorf("error getting key %s from response %s: %s", requestingPublicKeyID.String(), string(b), err)
+			return nil, false, fmt.Errorf("error getting key %s from response %s: %s", requestingPublicKeyID.String(), string(b), err)
 		}
 
 		// we should be able to get the actual key embedded in the vocab.W3IDSecurityV1PublicKey
 		pkPemProp := requestingPublicKey.GetW3IDSecurityV1PublicKeyPem()
 		if pkPemProp == nil || !pkPemProp.IsXMLSchemaString() {
-			return nil, errors.New("publicKeyPem property is not provided or it is not embedded as a value")
+			return nil, false, errors.New("publicKeyPem property is not provided or it is not embedded as a value")
 		}
 
 		// and decode the PEM so that we can parse it as a golang public key
 		pubKeyPem := pkPemProp.Get()
 		block, _ := pem.Decode([]byte(pubKeyPem))
 		if block == nil || block.Type != "PUBLIC KEY" {
-			return nil, errors.New("could not decode publicKeyPem to PUBLIC KEY pem block type")
+			return nil, false, errors.New("could not decode publicKeyPem to PUBLIC KEY pem block type")
 		}
 
 		publicKey, err = x509.ParsePKIXPublicKey(block.Bytes)
 		if err != nil {
-			return nil, fmt.Errorf("could not parse public key from block bytes: %s", err)
+			return nil, false, fmt.Errorf("could not parse public key from block bytes: %s", err)
 		}
 
 		// all good! we just need the URI of the key owner to return
 		pkOwnerProp := requestingPublicKey.GetW3IDSecurityV1Owner()
 		if pkOwnerProp == nil || !pkOwnerProp.IsIRI() {
-			return nil, errors.New("publicKeyOwner property is not provided or it is not embedded as a value")
+			return nil, false, errors.New("publicKeyOwner property is not provided or it is not embedded as a value")
 		}
 		pkOwnerURI = pkOwnerProp.GetIRI()
 	}
 	if publicKey == nil {
-		return nil, errors.New("returned public key was empty")
+		return nil, false, errors.New("returned public key was empty")
 	}
 
 	// do the actual authentication here!
 	algo := httpsig.RSA_SHA256 // TODO: make this more robust
 	if err := verifier.Verify(publicKey, algo); err != nil {
-		return nil, fmt.Errorf("error verifying key %s: %s", requestingPublicKeyID.String(), err)
+		return nil, false, nil
 	}
 
-	return pkOwnerURI, nil
-}
-
-func (f *federator) blockedDomain(host string) (bool, error) {
-	b := &gtsmodel.DomainBlock{}
-	err := f.db.GetWhere([]db.Where{{Key: "domain", Value: host, CaseInsensitive: true}}, b)
-	if err == nil {
-		// block exists
-		return true, nil
-	}
-
-	if _, ok := err.(db.ErrNoEntries); ok {
-		// there are no entries so there's no block
-		return false, nil
-	}
-
-	// there's an actual error
-	return false, err
+	return pkOwnerURI, true, nil
 }

internal/federation/dereference.go

@@ -9,7 +9,11 @@
 
 	"github.com/go-fed/activity/streams"
 	"github.com/go-fed/activity/streams/vocab"
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/transport"
 	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 )
 
@@ -17,6 +21,10 @@ func (f *federator) DereferenceRemoteAccount(username string, remoteAccountID *u
 	f.startHandshake(username, remoteAccountID)
 	defer f.stopHandshake(username, remoteAccountID)
 
+	if blocked, err := f.blockedDomain(remoteAccountID.Host); blocked || err != nil {
+		return nil, fmt.Errorf("DereferenceRemoteAccount: domain %s is blocked", remoteAccountID.Host)
+	}
+
 	transport, err := f.GetTransportForUser(username)
 	if err != nil {
 		return nil, fmt.Errorf("transport err: %s", err)
@@ -62,6 +70,10 @@ func (f *federator) DereferenceRemoteAccount(username string, remoteAccountID *u
 }
 
 func (f *federator) DereferenceRemoteStatus(username string, remoteStatusID *url.URL) (typeutils.Statusable, error) {
+	if blocked, err := f.blockedDomain(remoteStatusID.Host); blocked || err != nil {
+		return nil, fmt.Errorf("DereferenceRemoteStatus: domain %s is blocked", remoteStatusID.Host)
+	}
+
 	transport, err := f.GetTransportForUser(username)
 	if err != nil {
 		return nil, fmt.Errorf("transport err: %s", err)
@@ -144,6 +156,10 @@ func (f *federator) DereferenceRemoteStatus(username string, remoteStatusID *url
 }
 
 func (f *federator) DereferenceRemoteInstance(username string, remoteInstanceURI *url.URL) (*gtsmodel.Instance, error) {
+	if blocked, err := f.blockedDomain(remoteInstanceURI.Host); blocked || err != nil {
+		return nil, fmt.Errorf("DereferenceRemoteInstance: domain %s is blocked", remoteInstanceURI.Host)
+	}
+
 	transport, err := f.GetTransportForUser(username)
 	if err != nil {
 		return nil, fmt.Errorf("transport err: %s", err)
@@ -151,3 +167,358 @@ func (f *federator) DereferenceRemoteInstance(username string, remoteInstanceURI
 
 	return transport.DereferenceInstance(context.Background(), remoteInstanceURI)
 }
+
+// dereferenceStatusFields fetches all the information we temporarily pinned to an incoming
+// federated status, back in the federating db's Create function.
+//
+// When a status comes in from the federation API, there are certain fields that
+// haven't been dereferenced yet, because we needed to provide a snappy synchronous
+// response to the caller. By the time it reaches this function though, it's being
+// processed asynchronously, so we have all the time in the world to fetch the various
+// bits and bobs that are attached to the status, and properly flesh it out, before we
+// send the status to any timelines and notify people.
+//
+// Things to dereference and fetch here:
+//
+// 1. Media attachments.
+// 2. Hashtags.
+// 3. Emojis.
+// 4. Mentions.
+// 5. Posting account.
+// 6. Replied-to-status.
+//
+// SIDE EFFECTS:
+// This function will deference all of the above, insert them in the database as necessary,
+// and attach them to the status. The status itself will not be added to the database yet,
+// that's up the caller to do.
+func (f *federator) DereferenceStatusFields(status *gtsmodel.Status, requestingUsername string) error {
+	l := f.log.WithFields(logrus.Fields{
+		"func":   "dereferenceStatusFields",
+		"status": fmt.Sprintf("%+v", status),
+	})
+	l.Debug("entering function")
+
+	statusURI, err := url.Parse(status.URI)
+	if err != nil {
+		return fmt.Errorf("DereferenceStatusFields: couldn't parse status URI %s: %s", status.URI, err)
+	}
+	if blocked, err := f.blockedDomain(statusURI.Host); blocked || err != nil {
+		return fmt.Errorf("DereferenceStatusFields: domain %s is blocked", statusURI.Host)
+	}
+
+	t, err := f.GetTransportForUser(requestingUsername)
+	if err != nil {
+		return fmt.Errorf("error creating transport: %s", err)
+	}
+
+	// the status should have an ID by now, but just in case it doesn't let's generate one here
+	// because we'll need it further down
+	if status.ID == "" {
+		newID, err := id.NewULIDFromTime(status.CreatedAt)
+		if err != nil {
+			return err
+		}
+		status.ID = newID
+	}
+
+	// 1. Media attachments.
+	//
+	// At this point we should know:
+	// * the media type of the file we're looking for (a.File.ContentType)
+	// * the blurhash (a.Blurhash)
+	// * the file type (a.Type)
+	// * the remote URL (a.RemoteURL)
+	// This should be enough to pass along to the media processor.
+	attachmentIDs := []string{}
+	for _, a := range status.GTSMediaAttachments {
+		l.Debugf("dereferencing attachment: %+v", a)
+
+		// it might have been processed elsewhere so check first if it's already in the database or not
+		maybeAttachment := &gtsmodel.MediaAttachment{}
+		err := f.db.GetWhere([]db.Where{{Key: "remote_url", Value: a.RemoteURL}}, maybeAttachment)
+		if err == nil {
+			// we already have it in the db, dereferenced, no need to do it again
+			l.Debugf("attachment already exists with id %s", maybeAttachment.ID)
+			attachmentIDs = append(attachmentIDs, maybeAttachment.ID)
+			continue
+		}
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// we have a real error
+			return fmt.Errorf("error checking db for existence of attachment with remote url %s: %s", a.RemoteURL, err)
+		}
+		// it just doesn't exist yet so carry on
+		l.Debug("attachment doesn't exist yet, calling ProcessRemoteAttachment", a)
+		deferencedAttachment, err := f.mediaHandler.ProcessRemoteAttachment(t, a, status.AccountID)
+		if err != nil {
+			l.Errorf("error dereferencing status attachment: %s", err)
+			continue
+		}
+		l.Debugf("dereferenced attachment: %+v", deferencedAttachment)
+		deferencedAttachment.StatusID = status.ID
+		deferencedAttachment.Description = a.Description
+		if err := f.db.Put(deferencedAttachment); err != nil {
+			return fmt.Errorf("error inserting dereferenced attachment with remote url %s: %s", a.RemoteURL, err)
+		}
+		attachmentIDs = append(attachmentIDs, deferencedAttachment.ID)
+	}
+	status.Attachments = attachmentIDs
+
+	// 2. Hashtags
+
+	// 3. Emojis
+
+	// 4. Mentions
+	// At this point, mentions should have the namestring and mentionedAccountURI set on them.
+	//
+	// We should dereference any accounts mentioned here which we don't have in our db yet, by their URI.
+	mentions := []string{}
+	for _, m := range status.GTSMentions {
+		if m.ID == "" {
+			mID, err := id.NewRandomULID()
+			if err != nil {
+				return err
+			}
+			m.ID = mID
+		}
+
+		uri, err := url.Parse(m.MentionedAccountURI)
+		if err != nil {
+			l.Debugf("error parsing mentioned account uri %s: %s", m.MentionedAccountURI, err)
+			continue
+		}
+
+		m.StatusID = status.ID
+		m.OriginAccountID = status.GTSAuthorAccount.ID
+		m.OriginAccountURI = status.GTSAuthorAccount.URI
+
+		targetAccount := &gtsmodel.Account{}
+		if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String()}}, targetAccount); err != nil {
+			// proper error
+			if _, ok := err.(db.ErrNoEntries); !ok {
+				return fmt.Errorf("db error checking for account with uri %s", uri.String())
+			}
+
+			// we just don't have it yet, so we should go get it....
+			accountable, err := f.DereferenceRemoteAccount(requestingUsername, uri)
+			if err != nil {
+				// we can't dereference it so just skip it
+				l.Debugf("error dereferencing remote account with uri %s: %s", uri.String(), err)
+				continue
+			}
+
+			targetAccount, err = f.typeConverter.ASRepresentationToAccount(accountable, false)
+			if err != nil {
+				l.Debugf("error converting remote account with uri %s into gts model: %s", uri.String(), err)
+				continue
+			}
+
+			targetAccountID, err := id.NewRandomULID()
+			if err != nil {
+				return err
+			}
+			targetAccount.ID = targetAccountID
+
+			if err := f.db.Put(targetAccount); err != nil {
+				return fmt.Errorf("db error inserting account with uri %s", uri.String())
+			}
+		}
+
+		// by this point, we know the targetAccount exists in our database with an ID :)
+		m.TargetAccountID = targetAccount.ID
+		if err := f.db.Put(m); err != nil {
+			return fmt.Errorf("error creating mention: %s", err)
+		}
+		mentions = append(mentions, m.ID)
+	}
+	status.Mentions = mentions
+
+	return nil
+}
+
+func (f *federator) DereferenceAccountFields(account *gtsmodel.Account, requestingUsername string, refresh bool) error {
+	l := f.log.WithFields(logrus.Fields{
+		"func":               "dereferenceAccountFields",
+		"requestingUsername": requestingUsername,
+	})
+
+	accountURI, err := url.Parse(account.URI)
+	if err != nil {
+		return fmt.Errorf("DereferenceAccountFields: couldn't parse account URI %s: %s", account.URI, err)
+	}
+	if blocked, err := f.blockedDomain(accountURI.Host); blocked || err != nil {
+		return fmt.Errorf("DereferenceAccountFields: domain %s is blocked", accountURI.Host)
+	}
+
+	t, err := f.GetTransportForUser(requestingUsername)
+	if err != nil {
+		return fmt.Errorf("error getting transport for user: %s", err)
+	}
+
+	// fetch the header and avatar
+	if err := f.fetchHeaderAndAviForAccount(account, t, refresh); err != nil {
+		// if this doesn't work, just skip it -- we can do it later
+		l.Debugf("error fetching header/avi for account: %s", err)
+	}
+
+	if err := f.db.UpdateByID(account.ID, account); err != nil {
+		return fmt.Errorf("error updating account in database: %s", err)
+	}
+
+	return nil
+}
+
+func (f *federator) DereferenceAnnounce(announce *gtsmodel.Status, requestingUsername string) error {
+	if announce.GTSBoostedStatus == nil || announce.GTSBoostedStatus.URI == "" {
+		// we can't do anything unfortunately
+		return errors.New("DereferenceAnnounce: no URI to dereference")
+	}
+
+	boostedStatusURI, err := url.Parse(announce.GTSBoostedStatus.URI)
+	if err != nil {
+		return fmt.Errorf("DereferenceAnnounce: couldn't parse boosted status URI %s: %s", announce.GTSBoostedStatus.URI, err)
+	}
+	if blocked, err := f.blockedDomain(boostedStatusURI.Host); blocked || err != nil {
+		return fmt.Errorf("DereferenceAnnounce: domain %s is blocked", boostedStatusURI.Host)
+	}
+
+	// check if we already have the boosted status in the database
+	boostedStatus := &gtsmodel.Status{}
+	err = f.db.GetWhere([]db.Where{{Key: "uri", Value: announce.GTSBoostedStatus.URI}}, boostedStatus)
+	if err == nil {
+		// nice, we already have it so we don't actually need to dereference it from remote
+		announce.Content = boostedStatus.Content
+		announce.ContentWarning = boostedStatus.ContentWarning
+		announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
+		announce.Sensitive = boostedStatus.Sensitive
+		announce.Language = boostedStatus.Language
+		announce.Text = boostedStatus.Text
+		announce.BoostOfID = boostedStatus.ID
+		announce.Visibility = boostedStatus.Visibility
+		announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
+		announce.GTSBoostedStatus = boostedStatus
+		return nil
+	}
+
+	// we don't have it so we need to dereference it
+	statusable, err := f.DereferenceRemoteStatus(requestingUsername, boostedStatusURI)
+	if err != nil {
+		return fmt.Errorf("dereferenceAnnounce: error dereferencing remote status with id %s: %s", announce.GTSBoostedStatus.URI, err)
+	}
+
+	// make sure we have the author account in the db
+	attributedToProp := statusable.GetActivityStreamsAttributedTo()
+	for iter := attributedToProp.Begin(); iter != attributedToProp.End(); iter = iter.Next() {
+		accountURI := iter.GetIRI()
+		if accountURI == nil {
+			continue
+		}
+
+		if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: accountURI.String()}}, &gtsmodel.Account{}); err == nil {
+			// we already have it, fine
+			continue
+		}
+
+		// we don't have the boosted status author account yet so dereference it
+		accountable, err := f.DereferenceRemoteAccount(requestingUsername, accountURI)
+		if err != nil {
+			return fmt.Errorf("dereferenceAnnounce: error dereferencing remote account with id %s: %s", accountURI.String(), err)
+		}
+		account, err := f.typeConverter.ASRepresentationToAccount(accountable, false)
+		if err != nil {
+			return fmt.Errorf("dereferenceAnnounce: error converting dereferenced account with id %s into account : %s", accountURI.String(), err)
+		}
+
+		accountID, err := id.NewRandomULID()
+		if err != nil {
+			return err
+		}
+		account.ID = accountID
+
+		if err := f.db.Put(account); err != nil {
+			return fmt.Errorf("dereferenceAnnounce: error putting dereferenced account with id %s into database : %s", accountURI.String(), err)
+		}
+
+		if err := f.DereferenceAccountFields(account, requestingUsername, false); err != nil {
+			return fmt.Errorf("dereferenceAnnounce: error dereferencing fields on account with id %s : %s", accountURI.String(), err)
+		}
+	}
+
+	// now convert the statusable into something we can understand
+	boostedStatus, err = f.typeConverter.ASStatusToStatus(statusable)
+	if err != nil {
+		return fmt.Errorf("dereferenceAnnounce: error converting dereferenced statusable with id %s into status : %s", announce.GTSBoostedStatus.URI, err)
+	}
+
+	boostedStatusID, err := id.NewULIDFromTime(boostedStatus.CreatedAt)
+	if err != nil {
+		return nil
+	}
+	boostedStatus.ID = boostedStatusID
+
+	if err := f.db.Put(boostedStatus); err != nil {
+		return fmt.Errorf("dereferenceAnnounce: error putting dereferenced status with id %s into the db: %s", announce.GTSBoostedStatus.URI, err)
+	}
+
+	// now dereference additional fields straight away (we're already async here so we have time)
+	if err := f.DereferenceStatusFields(boostedStatus, requestingUsername); err != nil {
+		return fmt.Errorf("dereferenceAnnounce: error dereferencing status fields for status with id %s: %s", announce.GTSBoostedStatus.URI, err)
+	}
+
+	// update with the newly dereferenced fields
+	if err := f.db.UpdateByID(boostedStatus.ID, boostedStatus); err != nil {
+		return fmt.Errorf("dereferenceAnnounce: error updating dereferenced status in the db: %s", err)
+	}
+
+	// we have everything we need!
+	announce.Content = boostedStatus.Content
+	announce.ContentWarning = boostedStatus.ContentWarning
+	announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
+	announce.Sensitive = boostedStatus.Sensitive
+	announce.Language = boostedStatus.Language
+	announce.Text = boostedStatus.Text
+	announce.BoostOfID = boostedStatus.ID
+	announce.Visibility = boostedStatus.Visibility
+	announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
+	announce.GTSBoostedStatus = boostedStatus
+	return nil
+}
+
+// fetchHeaderAndAviForAccount fetches the header and avatar for a remote account, using a transport
+// on behalf of requestingUsername.
+//
+// targetAccount's AvatarMediaAttachmentID and HeaderMediaAttachmentID will be updated as necessary.
+//
+// SIDE EFFECTS: remote header and avatar will be stored in local storage, and the database will be updated
+// to reflect the creation of these new attachments.
+func (f *federator) fetchHeaderAndAviForAccount(targetAccount *gtsmodel.Account, t transport.Transport, refresh bool) error {
+	accountURI, err := url.Parse(targetAccount.URI)
+	if err != nil {
+		return fmt.Errorf("fetchHeaderAndAviForAccount: couldn't parse account URI %s: %s", targetAccount.URI, err)
+	}
+	if blocked, err := f.blockedDomain(accountURI.Host); blocked || err != nil {
+		return fmt.Errorf("fetchHeaderAndAviForAccount: domain %s is blocked", accountURI.Host)
+	}
+
+	if targetAccount.AvatarRemoteURL != "" && (targetAccount.AvatarMediaAttachmentID == "" || refresh) {
+		a, err := f.mediaHandler.ProcessRemoteHeaderOrAvatar(t, &gtsmodel.MediaAttachment{
+			RemoteURL: targetAccount.AvatarRemoteURL,
+			Avatar:    true,
+		}, targetAccount.ID)
+		if err != nil {
+			return fmt.Errorf("error processing avatar for user: %s", err)
+		}
+		targetAccount.AvatarMediaAttachmentID = a.ID
+	}
+
+	if targetAccount.HeaderRemoteURL != "" && (targetAccount.HeaderMediaAttachmentID == "" || refresh) {
+		a, err := f.mediaHandler.ProcessRemoteHeaderOrAvatar(t, &gtsmodel.MediaAttachment{
+			RemoteURL: targetAccount.HeaderRemoteURL,
+			Header:    true,
+		}, targetAccount.ID)
+		if err != nil {
+			return fmt.Errorf("error processing header for user: %s", err)
+		}
+		targetAccount.HeaderMediaAttachmentID = a.ID
+	}
+	return nil
+}

internal/federation/federatingprotocol.go

@@ -119,10 +119,15 @@ func (f *federator) AuthenticatePostInbox(ctx context.Context, w http.ResponseWr
 		return nil, false, fmt.Errorf("could not fetch requested account with username %s: %s", username, err)
 	}
 
-	publicKeyOwnerURI, err := f.AuthenticateFederatedRequest(requestedAccount.Username, r)
+	publicKeyOwnerURI, authenticated, err := f.AuthenticateFederatedRequest(ctx, requestedAccount.Username)
 	if err != nil {
 		l.Debugf("request not authenticated: %s", err)
-		return ctx, false, fmt.Errorf("not authenticated: %s", err)
+		return ctx, false, err
+	}
+
+	if !authenticated {
+		w.WriteHeader(http.StatusForbidden)
+		return ctx, false, nil
 	}
 
 	// authentication has passed, so add an instance entry for this instance if it hasn't been done already
@@ -230,6 +235,14 @@ func (f *federator) Blocked(ctx context.Context, actorIRIs []*url.URL) (bool, er
 	}
 
 	for _, uri := range actorIRIs {
+		blockedDomain, err := f.blockedDomain(uri.Host)
+		if err != nil {
+			return false, fmt.Errorf("error checking domain block: %s", err)
+		}
+		if blockedDomain {
+			return true, nil
+		}
+
 		a := &gtsmodel.Account{}
 		if err := f.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String()}}, a); err != nil {
 			_, ok := err.(db.ErrNoEntries)

internal/federation/federator.go

@@ -19,7 +19,7 @@
 package federation
 
 import (
-	"net/http"
+	"context"
 	"net/url"
 	"sync"
 
@@ -29,6 +29,7 @@
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/federation/federatingdb"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/transport"
 	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 )
@@ -41,7 +42,13 @@ type Federator interface {
 	FederatingDB() federatingdb.DB
 	// AuthenticateFederatedRequest can be used to check the authenticity of incoming http-signed requests for federating resources.
 	// The given username will be used to create a transport for making outgoing requests. See the implementation for more detailed comments.
-	AuthenticateFederatedRequest(username string, r *http.Request) (*url.URL, error)
+	//
+	// If the request is valid and passes authentication, the URL of the key owner ID will be returned, as well as true, and nil.
+	//
+	// If the request does not pass authentication, or there's a domain block, nil, false, nil will be returned.
+	//
+	// If something goes wrong during authentication, nil, false, and an error will be returned.
+	AuthenticateFederatedRequest(ctx context.Context, username string) (*url.URL, bool, error)
 	// FingerRemoteAccount performs a webfinger lookup for a remote account, using the .well-known path. It will return the ActivityPub URI for that
 	// account, or an error if it doesn't exist or can't be retrieved.
 	FingerRemoteAccount(requestingUsername string, targetUsername string, targetDomain string) (*url.URL, error)
@@ -54,6 +61,12 @@ type Federator interface {
 	// DereferenceRemoteInstance takes the URL of a remote instance, and a username (optional) to spin up a transport with. It then
 	// does its damnedest to get some kind of information back about the instance, trying /api/v1/instance, then /.well-known/nodeinfo
 	DereferenceRemoteInstance(username string, remoteInstanceURI *url.URL) (*gtsmodel.Instance, error)
+	// DereferenceStatusFields does further dereferencing on a status.
+	DereferenceStatusFields(status *gtsmodel.Status, requestingUsername string) error
+	// DereferenceAccountFields does further dereferencing on an account.
+	DereferenceAccountFields(account *gtsmodel.Account, requestingUsername string, refresh bool) error
+	// DereferenceAnnounce does further dereferencing on an announce.
+	DereferenceAnnounce(announce *gtsmodel.Status, requestingUsername string) error
 	// GetTransportForUser returns a new transport initialized with the key credentials belonging to the given username.
 	// This can be used for making signed http requests.
 	//
@@ -72,6 +85,7 @@ type federator struct {
 	clock               pub.Clock
 	typeConverter       typeutils.TypeConverter
 	transportController transport.Controller
+	mediaHandler        media.Handler
 	actor               pub.FederatingActor
 	log                 *logrus.Logger
 	handshakes          map[string][]*url.URL
@@ -79,7 +93,7 @@ type federator struct {
 }
 
 // NewFederator returns a new federator
-func NewFederator(db db.DB, federatingDB federatingdb.DB, transportController transport.Controller, config *config.Config, log *logrus.Logger, typeConverter typeutils.TypeConverter) Federator {
+func NewFederator(db db.DB, federatingDB federatingdb.DB, transportController transport.Controller, config *config.Config, log *logrus.Logger, typeConverter typeutils.TypeConverter, mediaHandler media.Handler) Federator {
 
 	clock := &Clock{}
 	f := &federator{
@@ -89,6 +103,7 @@ func NewFederator(db db.DB, federatingDB federatingdb.DB, transportController tr
 		clock:               &Clock{},
 		typeConverter:       typeConverter,
 		transportController: transportController,
+		mediaHandler:        mediaHandler,
 		log:                 log,
 		handshakeSync:       &sync.Mutex{},
 	}

internal/federation/federator_test.go

@@ -89,7 +89,7 @@ func (suite *ProtocolTestSuite) TestPostInboxRequestBodyHook() {
 		return nil, nil
 	}))
 	// setup module being tested
-	federator := federation.NewFederator(suite.db, testrig.NewTestFederatingDB(suite.db), tc, suite.config, suite.log, suite.typeConverter)
+	federator := federation.NewFederator(suite.db, testrig.NewTestFederatingDB(suite.db), tc, suite.config, suite.log, suite.typeConverter, testrig.NewTestMediaHandler(suite.db, suite.storage))
 
 	// setup request
 	ctx := context.Background()
@@ -155,7 +155,7 @@ func (suite *ProtocolTestSuite) TestAuthenticatePostInbox() {
 	}))
 
 	// now setup module being tested, with the mock transport controller
-	federator := federation.NewFederator(suite.db, testrig.NewTestFederatingDB(suite.db), tc, suite.config, suite.log, suite.typeConverter)
+	federator := federation.NewFederator(suite.db, testrig.NewTestFederatingDB(suite.db), tc, suite.config, suite.log, suite.typeConverter, testrig.NewTestMediaHandler(suite.db, suite.storage))
 
 	// setup request
 	ctx := context.Background()

internal/federation/finger.go

@@ -30,6 +30,9 @@
 )
 
 func (f *federator) FingerRemoteAccount(requestingUsername string, targetUsername string, targetDomain string) (*url.URL, error) {
+	if blocked, err := f.blockedDomain(targetDomain); blocked || err != nil {
+		return nil, fmt.Errorf("FingerRemoteAccount: domain %s is blocked", targetDomain)
+	}
 
 	t, err := f.GetTransportForUser(requestingUsername)
 	if err != nil {

internal/federation/util.go

@@ -0,0 +1,23 @@
+package federation
+
+import (
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (f *federator) blockedDomain(host string) (bool, error) {
+	b := &gtsmodel.DomainBlock{}
+	err := f.db.GetWhere([]db.Where{{Key: "domain", Value: host, CaseInsensitive: true}}, b)
+	if err == nil {
+		// block exists
+		return true, nil
+	}
+
+	if _, ok := err.(db.ErrNoEntries); ok {
+		// there are no entries so there's no block
+		return false, nil
+	}
+
+	// there's an actual error
+	return false, err
+}

internal/gtsmodel/domainblock.go

@@ -20,28 +20,24 @@
 
 import "time"
 
-// DomainBlock represents a federation block against a particular domain, of varying severity.
+// DomainBlock represents a federation block against a particular domain
 type DomainBlock struct {
 	// ID of this block in the database
 	ID string `pg:"type:CHAR(26),pk,notnull,unique"`
-	// Domain to block. If ANY PART of the candidate domain contains this string, it will be blocked.
-	// For example: 'example.org' also blocks 'gts.example.org'. '.com' blocks *any* '.com' domains.
-	// TODO: implement wildcards here
-	Domain string `pg:",notnull"`
+	// blocked domain
+	Domain string `pg:",pk,notnull,unique"`
 	// When was this block created
 	CreatedAt time.Time `pg:"type:timestamp,notnull,default:now()"`
 	// When was this block updated
 	UpdatedAt time.Time `pg:"type:timestamp,notnull,default:now()"`
 	// Account ID of the creator of this block
 	CreatedByAccountID string `pg:"type:CHAR(26),notnull"`
-	// TODO: define this
-	Severity int
-	// Reject media from this domain?
-	RejectMedia bool
-	// Reject reports from this domain?
-	RejectReports bool
 	// Private comment on this block, viewable to admins
 	PrivateComment string
 	// Public comment on this block, viewable (optionally) by everyone
 	PublicComment string
+	// whether the domain name should appear obfuscated when displaying it publicly
+	Obfuscate bool
+	// if this block was created through a subscription, what's the subscription ID?
+	SubscriptionID string `pg:"type:CHAR(26)"`
 }

internal/gtsmodel/instance.go

@@ -7,7 +7,7 @@ type Instance struct {
 	// ID of this instance in the database
 	ID string `pg:"type:CHAR(26),pk,notnull,unique"`
 	// Instance domain eg example.org
-	Domain string `pg:",notnull,unique"`
+	Domain string `pg:",pk,notnull,unique"`
 	// Title of this instance as it would like to be displayed.
 	Title string
 	// base URI of this instance eg https://example.org

internal/oauth/util.go

@@ -73,14 +73,28 @@ func Authed(c *gin.Context, requireToken bool, requireApp bool, requireUser bool
 	if requireToken && a.Token == nil {
 		return nil, errors.New("token not supplied")
 	}
+
 	if requireApp && a.Application == nil {
 		return nil, errors.New("application not supplied")
 	}
-	if requireUser && a.User == nil {
+
+	if requireUser {
+		if a.User == nil {
 			return nil, errors.New("user not supplied")
 		}
-	if requireAccount && a.Account == nil {
+		if a.User.Disabled || !a.User.Approved {
+			return nil, errors.New("user disabled or not approved")
+		}
+	}
+
+	if requireAccount {
+		if a.Account == nil {
 			return nil, errors.New("account not supplied")
 		}
+		if !a.Account.SuspendedAt.IsZero() {
+			return nil, errors.New("account suspended")
+		}
+	}
+
 	return a, nil
 }

internal/processing/account.go

@@ -19,512 +19,43 @@
 package processing
 
 import (
-	"errors"
-	"fmt"
-
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
-	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-	"github.com/superseriousbusiness/gotosocial/internal/id"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
-	"github.com/superseriousbusiness/gotosocial/internal/util"
 )
 
-// accountCreate does the dirty work of making an account and user in the database.
-// It then returns a token to the caller, for use with the new account, as per the
-// spec here: https://docs.joinmastodon.org/methods/accounts/
 func (p *processor) AccountCreate(authed *oauth.Auth, form *apimodel.AccountCreateRequest) (*apimodel.Token, error) {
-	l := p.log.WithField("func", "accountCreate")
-
-	if err := p.db.IsEmailAvailable(form.Email); err != nil {
-		return nil, err
-	}
-
-	if err := p.db.IsUsernameAvailable(form.Username); err != nil {
-		return nil, err
-	}
-
-	// don't store a reason if we don't require one
-	reason := form.Reason
-	if !p.config.AccountsConfig.ReasonRequired {
-		reason = ""
-	}
-
-	l.Trace("creating new username and account")
-	user, err := p.db.NewSignup(form.Username, reason, p.config.AccountsConfig.RequireApproval, form.Email, form.Password, form.IP, form.Locale, authed.Application.ID)
-	if err != nil {
-		return nil, fmt.Errorf("error creating new signup in the database: %s", err)
-	}
-
-	l.Tracef("generating a token for user %s with account %s and application %s", user.ID, user.AccountID, authed.Application.ID)
-	accessToken, err := p.oauthServer.GenerateUserAccessToken(authed.Token, authed.Application.ClientSecret, user.ID)
-	if err != nil {
-		return nil, fmt.Errorf("error creating new access token for user %s: %s", user.ID, err)
-	}
-
-	return &apimodel.Token{
-		AccessToken: accessToken.GetAccess(),
-		TokenType:   "Bearer",
-		Scope:       accessToken.GetScope(),
-		CreatedAt:   accessToken.GetAccessCreateAt().Unix(),
-	}, nil
+	return p.accountProcessor.Create(authed.Token, authed.Application, form)
 }
 
 func (p *processor) AccountGet(authed *oauth.Auth, targetAccountID string) (*apimodel.Account, error) {
-	targetAccount := &gtsmodel.Account{}
-	if err := p.db.GetByID(targetAccountID, targetAccount); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return nil, errors.New("account not found")
-		}
-		return nil, fmt.Errorf("db error: %s", err)
-	}
-
-	// lazily dereference things on the account if it hasn't been done yet
-	var requestingUsername string
-	if authed.Account != nil {
-		requestingUsername = authed.Account.Username
-	}
-	if err := p.dereferenceAccountFields(targetAccount, requestingUsername, false); err != nil {
-		p.log.WithField("func", "AccountGet").Debugf("dereferencing account: %s", err)
-	}
-
-	var mastoAccount *apimodel.Account
-	var err error
-	if authed.Account != nil && targetAccount.ID == authed.Account.ID {
-		mastoAccount, err = p.tc.AccountToMastoSensitive(targetAccount)
-	} else {
-		mastoAccount, err = p.tc.AccountToMastoPublic(targetAccount)
-	}
-	if err != nil {
-		return nil, fmt.Errorf("error converting account: %s", err)
-	}
-	return mastoAccount, nil
+	return p.accountProcessor.Get(authed.Account, targetAccountID)
 }
 
 func (p *processor) AccountUpdate(authed *oauth.Auth, form *apimodel.UpdateCredentialsRequest) (*apimodel.Account, error) {
-	l := p.log.WithField("func", "AccountUpdate")
-
-	if form.Discoverable != nil {
-		if err := p.db.UpdateOneByID(authed.Account.ID, "discoverable", *form.Discoverable, &gtsmodel.Account{}); err != nil {
-			return nil, fmt.Errorf("error updating discoverable: %s", err)
-		}
-	}
-
-	if form.Bot != nil {
-		if err := p.db.UpdateOneByID(authed.Account.ID, "bot", *form.Bot, &gtsmodel.Account{}); err != nil {
-			return nil, fmt.Errorf("error updating bot: %s", err)
-		}
-	}
-
-	if form.DisplayName != nil {
-		if err := util.ValidateDisplayName(*form.DisplayName); err != nil {
-			return nil, err
-		}
-		if err := p.db.UpdateOneByID(authed.Account.ID, "display_name", *form.DisplayName, &gtsmodel.Account{}); err != nil {
-			return nil, err
-		}
-	}
-
-	if form.Note != nil {
-		if err := util.ValidateNote(*form.Note); err != nil {
-			return nil, err
-		}
-		if err := p.db.UpdateOneByID(authed.Account.ID, "note", *form.Note, &gtsmodel.Account{}); err != nil {
-			return nil, err
-		}
-	}
-
-	if form.Avatar != nil && form.Avatar.Size != 0 {
-		avatarInfo, err := p.updateAccountAvatar(form.Avatar, authed.Account.ID)
-		if err != nil {
-			return nil, err
-		}
-		l.Tracef("new avatar info for account %s is %+v", authed.Account.ID, avatarInfo)
-	}
-
-	if form.Header != nil && form.Header.Size != 0 {
-		headerInfo, err := p.updateAccountHeader(form.Header, authed.Account.ID)
-		if err != nil {
-			return nil, err
-		}
-		l.Tracef("new header info for account %s is %+v", authed.Account.ID, headerInfo)
-	}
-
-	if form.Locked != nil {
-		if err := p.db.UpdateOneByID(authed.Account.ID, "locked", *form.Locked, &gtsmodel.Account{}); err != nil {
-			return nil, err
-		}
-	}
-
-	if form.Source != nil {
-		if form.Source.Language != nil {
-			if err := util.ValidateLanguage(*form.Source.Language); err != nil {
-				return nil, err
-			}
-			if err := p.db.UpdateOneByID(authed.Account.ID, "language", *form.Source.Language, &gtsmodel.Account{}); err != nil {
-				return nil, err
-			}
-		}
-
-		if form.Source.Sensitive != nil {
-			if err := p.db.UpdateOneByID(authed.Account.ID, "locked", *form.Locked, &gtsmodel.Account{}); err != nil {
-				return nil, err
-			}
-		}
-
-		if form.Source.Privacy != nil {
-			if err := util.ValidatePrivacy(*form.Source.Privacy); err != nil {
-				return nil, err
-			}
-			if err := p.db.UpdateOneByID(authed.Account.ID, "privacy", *form.Source.Privacy, &gtsmodel.Account{}); err != nil {
-				return nil, err
-			}
-		}
-	}
-
-	// fetch the account with all updated values set
-	updatedAccount := &gtsmodel.Account{}
-	if err := p.db.GetByID(authed.Account.ID, updatedAccount); err != nil {
-		return nil, fmt.Errorf("could not fetch updated account %s: %s", authed.Account.ID, err)
-	}
-
-	p.fromClientAPI <- gtsmodel.FromClientAPI{
-		APObjectType:   gtsmodel.ActivityStreamsProfile,
-		APActivityType: gtsmodel.ActivityStreamsUpdate,
-		GTSModel:       updatedAccount,
-		OriginAccount:  updatedAccount,
-	}
-
-	acctSensitive, err := p.tc.AccountToMastoSensitive(updatedAccount)
-	if err != nil {
-		return nil, fmt.Errorf("could not convert account into mastosensitive account: %s", err)
-	}
-	return acctSensitive, nil
+	return p.accountProcessor.Update(authed.Account, form)
 }
 
-func (p *processor) AccountStatusesGet(authed *oauth.Auth, targetAccountID string, limit int, excludeReplies bool, maxID string, pinned bool, mediaOnly bool) ([]apimodel.Status, gtserror.WithCode) {
-	targetAccount := &gtsmodel.Account{}
-	if err := p.db.GetByID(targetAccountID, targetAccount); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry found for account id %s", targetAccountID))
-		}
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	statuses := []gtsmodel.Status{}
-	apiStatuses := []apimodel.Status{}
-	if err := p.db.GetStatusesByTimeDescending(targetAccountID, &statuses, limit, excludeReplies, maxID, pinned, mediaOnly); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return apiStatuses, nil
-		}
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	for _, s := range statuses {
-		visible, err := p.filter.StatusVisible(&s, authed.Account)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error checking status visibility: %s", err))
-		}
-		if !visible {
-			continue
-		}
-
-		apiStatus, err := p.tc.StatusToMasto(&s, authed.Account)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status to masto: %s", err))
-		}
-
-		apiStatuses = append(apiStatuses, *apiStatus)
-	}
-
-	return apiStatuses, nil
+func (p *processor) AccountStatusesGet(authed *oauth.Auth, targetAccountID string, limit int, excludeReplies bool, maxID string, pinnedOnly bool, mediaOnly bool) ([]apimodel.Status, gtserror.WithCode) {
+	return p.accountProcessor.StatusesGet(authed.Account, targetAccountID, limit, excludeReplies, maxID, pinnedOnly, mediaOnly)
 }
 
 func (p *processor) AccountFollowersGet(authed *oauth.Auth, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
-	blocked, err := p.db.Blocked(authed.Account.ID, targetAccountID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	if blocked {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts"))
-	}
-
-	followers := []gtsmodel.Follow{}
-	accounts := []apimodel.Account{}
-	if err := p.db.GetFollowersByAccountID(targetAccountID, &followers, false); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return accounts, nil
-		}
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	for _, f := range followers {
-		blocked, err := p.db.Blocked(authed.Account.ID, f.AccountID)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-		if blocked {
-			continue
-		}
-
-		a := &gtsmodel.Account{}
-		if err := p.db.GetByID(f.AccountID, a); err != nil {
-			if _, ok := err.(db.ErrNoEntries); ok {
-				continue
-			}
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-
-		// derefence account fields in case we haven't done it already
-		if err := p.dereferenceAccountFields(a, authed.Account.Username, false); err != nil {
-			// don't bail if we can't fetch them, we'll try another time
-			p.log.WithField("func", "AccountFollowersGet").Debugf("error dereferencing account fields: %s", err)
-		}
-
-		account, err := p.tc.AccountToMastoPublic(a)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-		accounts = append(accounts, *account)
-	}
-	return accounts, nil
+	return p.accountProcessor.FollowersGet(authed.Account, targetAccountID)
 }
 
 func (p *processor) AccountFollowingGet(authed *oauth.Auth, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
-	blocked, err := p.db.Blocked(authed.Account.ID, targetAccountID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	if blocked {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts"))
-	}
-
-	following := []gtsmodel.Follow{}
-	accounts := []apimodel.Account{}
-	if err := p.db.GetFollowingByAccountID(targetAccountID, &following); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return accounts, nil
-		}
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	for _, f := range following {
-		blocked, err := p.db.Blocked(authed.Account.ID, f.AccountID)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-		if blocked {
-			continue
-		}
-
-		a := &gtsmodel.Account{}
-		if err := p.db.GetByID(f.TargetAccountID, a); err != nil {
-			if _, ok := err.(db.ErrNoEntries); ok {
-				continue
-			}
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-
-		// derefence account fields in case we haven't done it already
-		if err := p.dereferenceAccountFields(a, authed.Account.Username, false); err != nil {
-			// don't bail if we can't fetch them, we'll try another time
-			p.log.WithField("func", "AccountFollowingGet").Debugf("error dereferencing account fields: %s", err)
-		}
-
-		account, err := p.tc.AccountToMastoPublic(a)
-		if err != nil {
-			return nil, gtserror.NewErrorInternalError(err)
-		}
-		accounts = append(accounts, *account)
-	}
-	return accounts, nil
+	return p.accountProcessor.FollowingGet(authed.Account, targetAccountID)
 }
 
 func (p *processor) AccountRelationshipGet(authed *oauth.Auth, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
-	if authed == nil || authed.Account == nil {
-		return nil, gtserror.NewErrorForbidden(errors.New("not authed"))
-	}
-
-	gtsR, err := p.db.GetRelationship(authed.Account.ID, targetAccountID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error getting relationship: %s", err))
-	}
-
-	r, err := p.tc.RelationshipToMasto(gtsR)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting relationship: %s", err))
-	}
-
-	return r, nil
+	return p.accountProcessor.RelationshipGet(authed.Account, targetAccountID)
 }
 
 func (p *processor) AccountFollowCreate(authed *oauth.Auth, form *apimodel.AccountFollowRequest) (*apimodel.Relationship, gtserror.WithCode) {
-	// if there's a block between the accounts we shouldn't create the request ofc
-	blocked, err := p.db.Blocked(authed.Account.ID, form.TargetAccountID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-	if blocked {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: block exists between accounts"))
-	}
-
-	// make sure the target account actually exists in our db
-	targetAcct := &gtsmodel.Account{}
-	if err := p.db.GetByID(form.TargetAccountID, targetAcct); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: account %s not found in the db: %s", form.TargetAccountID, err))
-		}
-	}
-
-	// check if a follow exists already
-	follows, err := p.db.Follows(authed.Account, targetAcct)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow in db: %s", err))
-	}
-	if follows {
-		// already follows so just return the relationship
-		return p.AccountRelationshipGet(authed, form.TargetAccountID)
-	}
-
-	// check if a follow exists already
-	followRequested, err := p.db.FollowRequested(authed.Account, targetAcct)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow request in db: %s", err))
-	}
-	if followRequested {
-		// already follow requested so just return the relationship
-		return p.AccountRelationshipGet(authed, form.TargetAccountID)
-	}
-
-	// make the follow request
-	newFollowID, err := id.NewRandomULID()
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-
-	fr := &gtsmodel.FollowRequest{
-		ID:              newFollowID,
-		AccountID:       authed.Account.ID,
-		TargetAccountID: form.TargetAccountID,
-		ShowReblogs:     true,
-		URI:             util.GenerateURIForFollow(authed.Account.Username, p.config.Protocol, p.config.Host, newFollowID),
-		Notify:          false,
-	}
-	if form.Reblogs != nil {
-		fr.ShowReblogs = *form.Reblogs
-	}
-	if form.Notify != nil {
-		fr.Notify = *form.Notify
-	}
-
-	// whack it in the database
-	if err := p.db.Put(fr); err != nil {
-		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error creating follow request in db: %s", err))
-	}
-
-	// if it's a local account that's not locked we can just straight up accept the follow request
-	if !targetAcct.Locked && targetAcct.Domain == "" {
-		if _, err := p.db.AcceptFollowRequest(authed.Account.ID, form.TargetAccountID); err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error accepting folow request for local unlocked account: %s", err))
-		}
-		// return the new relationship
-		return p.AccountRelationshipGet(authed, form.TargetAccountID)
-	}
-
-	// otherwise we leave the follow request as it is and we handle the rest of the process asynchronously
-	p.fromClientAPI <- gtsmodel.FromClientAPI{
-		APObjectType:   gtsmodel.ActivityStreamsFollow,
-		APActivityType: gtsmodel.ActivityStreamsCreate,
-		GTSModel:       fr,
-		OriginAccount:  authed.Account,
-		TargetAccount:  targetAcct,
-	}
-
-	// return whatever relationship results from this
-	return p.AccountRelationshipGet(authed, form.TargetAccountID)
+	return p.accountProcessor.FollowCreate(authed.Account, form)
 }
 
 func (p *processor) AccountFollowRemove(authed *oauth.Auth, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
-	// if there's a block between the accounts we shouldn't do anything
-	blocked, err := p.db.Blocked(authed.Account.ID, targetAccountID)
-	if err != nil {
-		return nil, gtserror.NewErrorInternalError(err)
-	}
-	if blocked {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: block exists between accounts"))
-	}
-
-	// make sure the target account actually exists in our db
-	targetAcct := &gtsmodel.Account{}
-	if err := p.db.GetByID(targetAccountID, targetAcct); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: account %s not found in the db: %s", targetAccountID, err))
-		}
-	}
-
-	// check if a follow request exists, and remove it if it does (storing the URI for later)
-	var frChanged bool
-	var frURI string
-	fr := &gtsmodel.FollowRequest{}
-	if err := p.db.GetWhere([]db.Where{
-		{Key: "account_id", Value: authed.Account.ID},
-		{Key: "target_account_id", Value: targetAccountID},
-	}, fr); err == nil {
-		frURI = fr.URI
-		if err := p.db.DeleteByID(fr.ID, fr); err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow request from db: %s", err))
-		}
-		frChanged = true
-	}
-
-	// now do the same thing for any existing follow
-	var fChanged bool
-	var fURI string
-	f := &gtsmodel.Follow{}
-	if err := p.db.GetWhere([]db.Where{
-		{Key: "account_id", Value: authed.Account.ID},
-		{Key: "target_account_id", Value: targetAccountID},
-	}, f); err == nil {
-		fURI = f.URI
-		if err := p.db.DeleteByID(f.ID, f); err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow from db: %s", err))
-		}
-		fChanged = true
-	}
-
-	// follow request status changed so send the UNDO activity to the channel for async processing
-	if frChanged {
-		p.fromClientAPI <- gtsmodel.FromClientAPI{
-			APObjectType:   gtsmodel.ActivityStreamsFollow,
-			APActivityType: gtsmodel.ActivityStreamsUndo,
-			GTSModel: &gtsmodel.Follow{
-				AccountID:       authed.Account.ID,
-				TargetAccountID: targetAccountID,
-				URI:             frURI,
-			},
-			OriginAccount: authed.Account,
-			TargetAccount: targetAcct,
-		}
-	}
-
-	// follow status changed so send the UNDO activity to the channel for async processing
-	if fChanged {
-		p.fromClientAPI <- gtsmodel.FromClientAPI{
-			APObjectType:   gtsmodel.ActivityStreamsFollow,
-			APActivityType: gtsmodel.ActivityStreamsUndo,
-			GTSModel: &gtsmodel.Follow{
-				AccountID:       authed.Account.ID,
-				TargetAccountID: targetAccountID,
-				URI:             fURI,
-			},
-			OriginAccount: authed.Account,
-			TargetAccount: targetAcct,
-		}
-	}
-
-	// return whatever relationship results from all this
-	return p.AccountRelationshipGet(authed, targetAccountID)
+	return p.accountProcessor.FollowRemove(authed.Account, targetAccountID)
 }

internal/processing/account/account.go

@@ -0,0 +1,96 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"mime/multipart"
+
+	"github.com/sirupsen/logrus"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/federation"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+	"github.com/superseriousbusiness/gotosocial/internal/visibility"
+	"github.com/superseriousbusiness/oauth2/v4"
+)
+
+// Processor wraps a bunch of functions for processing account actions.
+type Processor interface {
+	// Create processes the given form for creating a new account, returning an oauth token for that account if successful.
+	Create(applicationToken oauth2.TokenInfo, application *gtsmodel.Application, form *apimodel.AccountCreateRequest) (*apimodel.Token, error)
+	// Delete deletes an account, and all of that account's statuses, media, follows, notifications, etc etc etc.
+	Delete(account *gtsmodel.Account, deletedBy string) error
+	// Get processes the given request for account information.
+	Get(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Account, error)
+	// Update processes the update of an account with the given form
+	Update(account *gtsmodel.Account, form *apimodel.UpdateCredentialsRequest) (*apimodel.Account, error)
+	// StatusesGet fetches a number of statuses (in time descending order) from the given account, filtered by visibility for
+	// the account given in authed.
+	StatusesGet(requestingAccount *gtsmodel.Account, targetAccountID string, limit int, excludeReplies bool, maxID string, pinned bool, mediaOnly bool) ([]apimodel.Status, gtserror.WithCode)
+	// FollowersGet fetches a list of the target account's followers.
+	FollowersGet(requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode)
+	// FollowingGet fetches a list of the accounts that target account is following.
+	FollowingGet(requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode)
+	// RelationshipGet returns a relationship model describing the relationship of the targetAccount to the Authed account.
+	RelationshipGet(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode)
+	// FollowCreate handles a follow request to an account, either remote or local.
+	FollowCreate(requestingAccount *gtsmodel.Account, form *apimodel.AccountFollowRequest) (*apimodel.Relationship, gtserror.WithCode)
+	// FollowRemove handles the removal of a follow/follow request to an account, either remote or local.
+	FollowRemove(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode)
+	// UpdateHeader does the dirty work of checking the header part of an account update form,
+	// parsing and checking the image, and doing the necessary updates in the database for this to become
+	// the account's new header image.
+	UpdateAvatar(avatar *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error)
+	// UpdateAvatar does the dirty work of checking the avatar part of an account update form,
+	// parsing and checking the image, and doing the necessary updates in the database for this to become
+	// the account's new avatar image.
+	UpdateHeader(header *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error)
+}
+
+type processor struct {
+	tc            typeutils.TypeConverter
+	config        *config.Config
+	mediaHandler  media.Handler
+	fromClientAPI chan gtsmodel.FromClientAPI
+	oauthServer   oauth.Server
+	filter        visibility.Filter
+	db            db.DB
+	federator     federation.Federator
+	log           *logrus.Logger
+}
+
+// New returns a new account processor.
+func New(db db.DB, tc typeutils.TypeConverter, mediaHandler media.Handler, oauthServer oauth.Server, fromClientAPI chan gtsmodel.FromClientAPI, federator federation.Federator, config *config.Config, log *logrus.Logger) Processor {
+	return &processor{
+		tc:            tc,
+		config:        config,
+		mediaHandler:  mediaHandler,
+		fromClientAPI: fromClientAPI,
+		oauthServer:   oauthServer,
+		filter:        visibility.NewFilter(db, log),
+		db:            db,
+		federator:     federator,
+		log:           log,
+	}
+}

internal/processing/account/create.go

@@ -0,0 +1,64 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/oauth2/v4"
+)
+
+func (p *processor) Create(applicationToken oauth2.TokenInfo, application *gtsmodel.Application, form *apimodel.AccountCreateRequest) (*apimodel.Token, error) {
+	l := p.log.WithField("func", "accountCreate")
+
+	if err := p.db.IsEmailAvailable(form.Email); err != nil {
+		return nil, err
+	}
+
+	if err := p.db.IsUsernameAvailable(form.Username); err != nil {
+		return nil, err
+	}
+
+	// don't store a reason if we don't require one
+	reason := form.Reason
+	if !p.config.AccountsConfig.ReasonRequired {
+		reason = ""
+	}
+
+	l.Trace("creating new username and account")
+	user, err := p.db.NewSignup(form.Username, reason, p.config.AccountsConfig.RequireApproval, form.Email, form.Password, form.IP, form.Locale, application.ID)
+	if err != nil {
+		return nil, fmt.Errorf("error creating new signup in the database: %s", err)
+	}
+
+	l.Tracef("generating a token for user %s with account %s and application %s", user.ID, user.AccountID, application.ID)
+	accessToken, err := p.oauthServer.GenerateUserAccessToken(applicationToken, application.ClientSecret, user.ID)
+	if err != nil {
+		return nil, fmt.Errorf("error creating new access token for user %s: %s", user.ID, err)
+	}
+
+	return &apimodel.Token{
+		AccessToken: accessToken.GetAccess(),
+		TokenType:   "Bearer",
+		Scope:       accessToken.GetScope(),
+		CreatedAt:   accessToken.GetAccessCreateAt().Unix(),
+	}, nil
+}

internal/processing/account/createfollow.go

@@ -0,0 +1,116 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (p *processor) FollowCreate(requestingAccount *gtsmodel.Account, form *apimodel.AccountFollowRequest) (*apimodel.Relationship, gtserror.WithCode) {
+	// if there's a block between the accounts we shouldn't create the request ofc
+	blocked, err := p.db.Blocked(requestingAccount.ID, form.TargetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+	if blocked {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: block exists between accounts"))
+	}
+
+	// make sure the target account actually exists in our db
+	targetAcct := &gtsmodel.Account{}
+	if err := p.db.GetByID(form.TargetAccountID, targetAcct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("accountfollowcreate: account %s not found in the db: %s", form.TargetAccountID, err))
+		}
+	}
+
+	// check if a follow exists already
+	follows, err := p.db.Follows(requestingAccount, targetAcct)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow in db: %s", err))
+	}
+	if follows {
+		// already follows so just return the relationship
+		return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+	}
+
+	// check if a follow exists already
+	followRequested, err := p.db.FollowRequested(requestingAccount, targetAcct)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error checking follow request in db: %s", err))
+	}
+	if followRequested {
+		// already follow requested so just return the relationship
+		return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+	}
+
+	// make the follow request
+	newFollowID, err := id.NewRandomULID()
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	fr := &gtsmodel.FollowRequest{
+		ID:              newFollowID,
+		AccountID:       requestingAccount.ID,
+		TargetAccountID: form.TargetAccountID,
+		ShowReblogs:     true,
+		URI:             util.GenerateURIForFollow(requestingAccount.Username, p.config.Protocol, p.config.Host, newFollowID),
+		Notify:          false,
+	}
+	if form.Reblogs != nil {
+		fr.ShowReblogs = *form.Reblogs
+	}
+	if form.Notify != nil {
+		fr.Notify = *form.Notify
+	}
+
+	// whack it in the database
+	if err := p.db.Put(fr); err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error creating follow request in db: %s", err))
+	}
+
+	// if it's a local account that's not locked we can just straight up accept the follow request
+	if !targetAcct.Locked && targetAcct.Domain == "" {
+		if _, err := p.db.AcceptFollowRequest(requestingAccount.ID, form.TargetAccountID); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("accountfollowcreate: error accepting folow request for local unlocked account: %s", err))
+		}
+		// return the new relationship
+		return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+	}
+
+	// otherwise we leave the follow request as it is and we handle the rest of the process asynchronously
+	p.fromClientAPI <- gtsmodel.FromClientAPI{
+		APObjectType:   gtsmodel.ActivityStreamsFollow,
+		APActivityType: gtsmodel.ActivityStreamsCreate,
+		GTSModel:       fr,
+		OriginAccount:  requestingAccount,
+		TargetAccount:  targetAcct,
+	}
+
+	// return whatever relationship results from this
+	return p.RelationshipGet(requestingAccount, form.TargetAccountID)
+}

internal/processing/account/delete.go

@@ -0,0 +1,270 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/oauth"
+)
+
+// Delete handles the complete deletion of an account.
+//
+// TODO in this function:
+// 1. Delete account's application(s), clients, and oauth tokens
+// 2. Delete account's blocks
+// 3. Delete account's emoji
+// 4. Delete account's follow requests
+// 5. Delete account's follows
+// 6. Delete account's statuses
+// 7. Delete account's media attachments
+// 8. Delete account's mentions
+// 9. Delete account's polls
+// 10. Delete account's notifications
+// 11. Delete account's bookmarks
+// 12. Delete account's faves
+// 13. Delete account's mutes
+// 14. Delete account's streams
+// 15. Delete account's tags
+// 16. Delete account's user
+// 17. Delete account's timeline
+// 18. Delete account itself
+func (p *processor) Delete(account *gtsmodel.Account, deletedBy string) error {
+	l := p.log.WithFields(logrus.Fields{
+		"func":     "Delete",
+		"username": account.Username,
+	})
+
+	l.Debugf("beginning account delete process for username %s", account.Username)
+
+	// 1. Delete account's application(s), clients, and oauth tokens
+	// we only need to do this step for local account since remote ones won't have any tokens or applications on our server
+	if account.Domain == "" {
+		// see if we can get a user for this account
+		u := &gtsmodel.User{}
+		if err := p.db.GetWhere([]db.Where{{Key: "account_id", Value: account.ID}}, u); err == nil {
+			// we got one! select all tokens with the user's ID
+			tokens := []*oauth.Token{}
+			if err := p.db.GetWhere([]db.Where{{Key: "user_id", Value: u.ID}}, &tokens); err == nil {
+				// we have some tokens to delete
+				for _, t := range tokens {
+					// delete client(s) associated with this token
+					if err := p.db.DeleteByID(t.ClientID, &oauth.Client{}); err != nil {
+						l.Errorf("error deleting oauth client: %s", err)
+					}
+					// delete application(s) associated with this token
+					if err := p.db.DeleteWhere([]db.Where{{Key: "client_id", Value: t.ClientID}}, &gtsmodel.Application{}); err != nil {
+						l.Errorf("error deleting application: %s", err)
+					}
+					// delete the token itself
+					if err := p.db.DeleteByID(t.ID, t); err != nil {
+						l.Errorf("error deleting oauth token: %s", err)
+					}
+				}
+			}
+		}
+	}
+
+	// 2. Delete account's blocks
+	l.Debug("deleting account blocks")
+	// first delete any blocks that this account created
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.Block{}); err != nil {
+		l.Errorf("error deleting blocks created by account: %s", err)
+	}
+
+	// now delete any blocks that target this account
+	if err := p.db.DeleteWhere([]db.Where{{Key: "target_account_id", Value: account.ID}}, &[]*gtsmodel.Block{}); err != nil {
+		l.Errorf("error deleting blocks targeting account: %s", err)
+	}
+
+	// 3. Delete account's emoji
+	// nothing to do here
+
+	// 4. Delete account's follow requests
+	l.Debug("deleting account follow requests")
+	// first delete any follow requests that this account created
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.FollowRequest{}); err != nil {
+		l.Errorf("error deleting follow requests created by account: %s", err)
+	}
+
+	// now delete any follow requests that target this account
+	if err := p.db.DeleteWhere([]db.Where{{Key: "target_account_id", Value: account.ID}}, &[]*gtsmodel.FollowRequest{}); err != nil {
+		l.Errorf("error deleting follow requests targeting account: %s", err)
+	}
+
+	// 5. Delete account's follows
+	l.Debug("deleting account follows")
+	// first delete any follows that this account created
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.Follow{}); err != nil {
+		l.Errorf("error deleting follows created by account: %s", err)
+	}
+
+	// now delete any follows that target this account
+	if err := p.db.DeleteWhere([]db.Where{{Key: "target_account_id", Value: account.ID}}, &[]*gtsmodel.Follow{}); err != nil {
+		l.Errorf("error deleting follows targeting account: %s", err)
+	}
+
+	// 6. Delete account's statuses
+	l.Debug("deleting account statuses")
+	// we'll select statuses 20 at a time so we don't wreck the db, and pass them through to the client api channel
+	// Deleting the statuses in this way also handles 7. Delete account's media attachments, 8. Delete account's mentions, and 9. Delete account's polls,
+	// since these are all attached to statuses.
+	var maxID string
+selectStatusesLoop:
+	for {
+		statuses, err := p.db.GetStatusesForAccount(account.ID, 20, false, maxID, false, false)
+		if err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// no statuses left for this instance so we're done
+				l.Infof("Delete: done iterating through statuses for account %s", account.Username)
+				break selectStatusesLoop
+			}
+			// an actual error has occurred
+			l.Errorf("Delete: db error selecting statuses for account %s: %s", account.Username, err)
+			break selectStatusesLoop
+		}
+
+		for i, s := range statuses {
+			// pass the status delete through the client api channel for processing
+			s.GTSAuthorAccount = account
+			l.Debug("putting status in the client api channel")
+			p.fromClientAPI <- gtsmodel.FromClientAPI{
+				APObjectType:   gtsmodel.ActivityStreamsNote,
+				APActivityType: gtsmodel.ActivityStreamsDelete,
+				GTSModel:       s,
+				OriginAccount:  account,
+				TargetAccount:  account,
+			}
+
+			if err := p.db.DeleteByID(s.ID, s); err != nil {
+				if _, ok := err.(db.ErrNoEntries); !ok {
+					// actual error has occurred
+					l.Errorf("Delete: db error status %s for account %s: %s", s.ID, account.Username, err)
+					break selectStatusesLoop
+				}
+			}
+
+			// if there are any boosts of this status, delete them as well
+			boosts := []*gtsmodel.Status{}
+			if err := p.db.GetWhere([]db.Where{{Key: "boost_of_id", Value: s.ID}}, &boosts); err != nil {
+				if _, ok := err.(db.ErrNoEntries); !ok {
+					// an actual error has occurred
+					l.Errorf("Delete: db error selecting boosts of status %s for account %s: %s", s.ID, account.Username, err)
+					break selectStatusesLoop
+				}
+			}
+
+			for _, b := range boosts {
+				oa := &gtsmodel.Account{}
+				if err := p.db.GetByID(b.AccountID, oa); err == nil {
+
+					l.Debug("putting boost undo in the client api channel")
+					p.fromClientAPI <- gtsmodel.FromClientAPI{
+						APObjectType:   gtsmodel.ActivityStreamsAnnounce,
+						APActivityType: gtsmodel.ActivityStreamsUndo,
+						GTSModel:       s,
+						OriginAccount:  oa,
+						TargetAccount:  account,
+					}
+				}
+
+				if err := p.db.DeleteByID(b.ID, b); err != nil {
+					if _, ok := err.(db.ErrNoEntries); !ok {
+						// actual error has occurred
+						l.Errorf("Delete: db error deleting boost with id %s: %s", b.ID, err)
+						break selectStatusesLoop
+					}
+				}
+			}
+
+			// if this is the last status in the slice, set the maxID appropriately for the next query
+			if i == len(statuses)-1 {
+				maxID = s.ID
+			}
+		}
+	}
+	l.Debug("done deleting statuses")
+
+	// 10. Delete account's notifications
+	l.Debug("deleting account notifications")
+	if err := p.db.DeleteWhere([]db.Where{{Key: "origin_account_id", Value: account.ID}}, &[]*gtsmodel.Notification{}); err != nil {
+		l.Errorf("error deleting notifications created by account: %s", err)
+	}
+
+	// 11. Delete account's bookmarks
+	l.Debug("deleting account bookmarks")
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.StatusBookmark{}); err != nil {
+		l.Errorf("error deleting bookmarks created by account: %s", err)
+	}
+
+	// 12. Delete account's faves
+	l.Debug("deleting account faves")
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.StatusFave{}); err != nil {
+		l.Errorf("error deleting faves created by account: %s", err)
+	}
+
+	// 13. Delete account's mutes
+	l.Debug("deleting account mutes")
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &[]*gtsmodel.StatusMute{}); err != nil {
+		l.Errorf("error deleting status mutes created by account: %s", err)
+	}
+
+	// 14. Delete account's streams
+
+	// 15. Delete account's tags
+	// TODO
+
+	// 16. Delete account's user
+	l.Debug("deleting account user")
+	if err := p.db.DeleteWhere([]db.Where{{Key: "account_id", Value: account.ID}}, &gtsmodel.User{}); err != nil {
+		return err
+	}
+
+	// 17. Delete account's timeline
+
+	// 18. Delete account itself
+	// to prevent the account being created again, set all these fields and update it in the db
+	// the account won't actually be *removed* from the database but it will be set to just a stub
+
+	account.Note = ""
+	account.DisplayName = ""
+	account.AvatarMediaAttachmentID = ""
+	account.AvatarRemoteURL = ""
+	account.HeaderMediaAttachmentID = ""
+	account.HeaderRemoteURL = ""
+	account.Reason = ""
+	account.Fields = []gtsmodel.Field{}
+	account.HideCollections = true
+	account.Discoverable = false
+
+	account.UpdatedAt = time.Now()
+
+	account.SuspendedAt = time.Now()
+	account.SuspensionOrigin = deletedBy
+
+	if err := p.db.UpdateByID(account.ID, account); err != nil {
+		return err
+	}
+
+	l.Infof("deleted account with username %s from domain %s", account.Username, account.Domain)
+	return nil
+}

internal/processing/account/get.go

@@ -0,0 +1,59 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Get(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Account, error) {
+	targetAccount := &gtsmodel.Account{}
+	if err := p.db.GetByID(targetAccountID, targetAccount); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, errors.New("account not found")
+		}
+		return nil, fmt.Errorf("db error: %s", err)
+	}
+
+	// lazily dereference things on the account if it hasn't been done yet
+	var requestingUsername string
+	if requestingAccount != nil {
+		requestingUsername = requestingAccount.Username
+	}
+	if err := p.federator.DereferenceAccountFields(targetAccount, requestingUsername, false); err != nil {
+		p.log.WithField("func", "AccountGet").Debugf("dereferencing account: %s", err)
+	}
+
+	var mastoAccount *apimodel.Account
+	var err error
+	if requestingAccount != nil && targetAccount.ID == requestingAccount.ID {
+		mastoAccount, err = p.tc.AccountToMastoSensitive(targetAccount)
+	} else {
+		mastoAccount, err = p.tc.AccountToMastoPublic(targetAccount)
+	}
+	if err != nil {
+		return nil, fmt.Errorf("error converting account: %s", err)
+	}
+	return mastoAccount, nil
+}

internal/processing/account/getfollowers.go

@@ -0,0 +1,79 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) FollowersGet(requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
+	blocked, err := p.db.Blocked(requestingAccount.ID, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	if blocked {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts"))
+	}
+
+	followers := []gtsmodel.Follow{}
+	accounts := []apimodel.Account{}
+	if err := p.db.GetFollowersByAccountID(targetAccountID, &followers, false); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return accounts, nil
+		}
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	for _, f := range followers {
+		blocked, err := p.db.Blocked(requestingAccount.ID, f.AccountID)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		if blocked {
+			continue
+		}
+
+		a := &gtsmodel.Account{}
+		if err := p.db.GetByID(f.AccountID, a); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				continue
+			}
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+
+		// derefence account fields in case we haven't done it already
+		if err := p.federator.DereferenceAccountFields(a, requestingAccount.Username, false); err != nil {
+			// don't bail if we can't fetch them, we'll try another time
+			p.log.WithField("func", "AccountFollowersGet").Debugf("error dereferencing account fields: %s", err)
+		}
+
+		account, err := p.tc.AccountToMastoPublic(a)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		accounts = append(accounts, *account)
+	}
+	return accounts, nil
+}

internal/processing/account/getfollowing.go

@@ -0,0 +1,79 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) FollowingGet(requestingAccount *gtsmodel.Account, targetAccountID string) ([]apimodel.Account, gtserror.WithCode) {
+	blocked, err := p.db.Blocked(requestingAccount.ID, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	if blocked {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts"))
+	}
+
+	following := []gtsmodel.Follow{}
+	accounts := []apimodel.Account{}
+	if err := p.db.GetFollowingByAccountID(targetAccountID, &following); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return accounts, nil
+		}
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	for _, f := range following {
+		blocked, err := p.db.Blocked(requestingAccount.ID, f.AccountID)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		if blocked {
+			continue
+		}
+
+		a := &gtsmodel.Account{}
+		if err := p.db.GetByID(f.TargetAccountID, a); err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				continue
+			}
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+
+		// derefence account fields in case we haven't done it already
+		if err := p.federator.DereferenceAccountFields(a, requestingAccount.Username, false); err != nil {
+			// don't bail if we can't fetch them, we'll try another time
+			p.log.WithField("func", "AccountFollowingGet").Debugf("error dereferencing account fields: %s", err)
+		}
+
+		account, err := p.tc.AccountToMastoPublic(a)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		accounts = append(accounts, *account)
+	}
+	return accounts, nil
+}

internal/processing/account/getrelationship.go

@@ -0,0 +1,46 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) RelationshipGet(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
+	if requestingAccount == nil {
+		return nil, gtserror.NewErrorForbidden(errors.New("not authed"))
+	}
+
+	gtsR, err := p.db.GetRelationship(requestingAccount.ID, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error getting relationship: %s", err))
+	}
+
+	r, err := p.tc.RelationshipToMasto(gtsR)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting relationship: %s", err))
+	}
+
+	return r, nil
+}

internal/processing/account/getstatuses.go

@@ -0,0 +1,63 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) StatusesGet(requestingAccount *gtsmodel.Account, targetAccountID string, limit int, excludeReplies bool, maxID string, pinnedOnly bool, mediaOnly bool) ([]apimodel.Status, gtserror.WithCode) {
+	targetAccount := &gtsmodel.Account{}
+	if err := p.db.GetByID(targetAccountID, targetAccount); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry found for account id %s", targetAccountID))
+		}
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	apiStatuses := []apimodel.Status{}
+	statuses, err := p.db.GetStatusesForAccount(targetAccountID, limit, excludeReplies, maxID, pinnedOnly, mediaOnly)
+	if err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return apiStatuses, nil
+		}
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	for _, s := range statuses {
+		visible, err := p.filter.StatusVisible(s, requestingAccount)
+		if err != nil || !visible {
+			continue
+		}
+
+		apiStatus, err := p.tc.StatusToMasto(s, requestingAccount)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("error converting status to masto: %s", err))
+		}
+
+		apiStatuses = append(apiStatuses, *apiStatus)
+	}
+
+	return apiStatuses, nil
+}

internal/processing/account/removefollow.go

@@ -0,0 +1,110 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) FollowRemove(requestingAccount *gtsmodel.Account, targetAccountID string) (*apimodel.Relationship, gtserror.WithCode) {
+	// if there's a block between the accounts we shouldn't do anything
+	blocked, err := p.db.Blocked(requestingAccount.ID, targetAccountID)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+	if blocked {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: block exists between accounts"))
+	}
+
+	// make sure the target account actually exists in our db
+	targetAcct := &gtsmodel.Account{}
+	if err := p.db.GetByID(targetAccountID, targetAcct); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("AccountFollowRemove: account %s not found in the db: %s", targetAccountID, err))
+		}
+	}
+
+	// check if a follow request exists, and remove it if it does (storing the URI for later)
+	var frChanged bool
+	var frURI string
+	fr := &gtsmodel.FollowRequest{}
+	if err := p.db.GetWhere([]db.Where{
+		{Key: "account_id", Value: requestingAccount.ID},
+		{Key: "target_account_id", Value: targetAccountID},
+	}, fr); err == nil {
+		frURI = fr.URI
+		if err := p.db.DeleteByID(fr.ID, fr); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow request from db: %s", err))
+		}
+		frChanged = true
+	}
+
+	// now do the same thing for any existing follow
+	var fChanged bool
+	var fURI string
+	f := &gtsmodel.Follow{}
+	if err := p.db.GetWhere([]db.Where{
+		{Key: "account_id", Value: requestingAccount.ID},
+		{Key: "target_account_id", Value: targetAccountID},
+	}, f); err == nil {
+		fURI = f.URI
+		if err := p.db.DeleteByID(f.ID, f); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("AccountFollowRemove: error removing follow from db: %s", err))
+		}
+		fChanged = true
+	}
+
+	// follow request status changed so send the UNDO activity to the channel for async processing
+	if frChanged {
+		p.fromClientAPI <- gtsmodel.FromClientAPI{
+			APObjectType:   gtsmodel.ActivityStreamsFollow,
+			APActivityType: gtsmodel.ActivityStreamsUndo,
+			GTSModel: &gtsmodel.Follow{
+				AccountID:       requestingAccount.ID,
+				TargetAccountID: targetAccountID,
+				URI:             frURI,
+			},
+			OriginAccount: requestingAccount,
+			TargetAccount: targetAcct,
+		}
+	}
+
+	// follow status changed so send the UNDO activity to the channel for async processing
+	if fChanged {
+		p.fromClientAPI <- gtsmodel.FromClientAPI{
+			APObjectType:   gtsmodel.ActivityStreamsFollow,
+			APActivityType: gtsmodel.ActivityStreamsUndo,
+			GTSModel: &gtsmodel.Follow{
+				AccountID:       requestingAccount.ID,
+				TargetAccountID: targetAccountID,
+				URI:             fURI,
+			},
+			OriginAccount: requestingAccount,
+			TargetAccount: targetAcct,
+		}
+	}
+
+	// return whatever relationship results from all this
+	return p.RelationshipGet(requestingAccount, targetAccountID)
+}

internal/processing/account/update.go

@@ -0,0 +1,199 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package account
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+	"mime/multipart"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+	"github.com/superseriousbusiness/gotosocial/internal/util"
+)
+
+func (p *processor) Update(account *gtsmodel.Account, form *apimodel.UpdateCredentialsRequest) (*apimodel.Account, error) {
+	l := p.log.WithField("func", "AccountUpdate")
+
+	if form.Discoverable != nil {
+		if err := p.db.UpdateOneByID(account.ID, "discoverable", *form.Discoverable, &gtsmodel.Account{}); err != nil {
+			return nil, fmt.Errorf("error updating discoverable: %s", err)
+		}
+	}
+
+	if form.Bot != nil {
+		if err := p.db.UpdateOneByID(account.ID, "bot", *form.Bot, &gtsmodel.Account{}); err != nil {
+			return nil, fmt.Errorf("error updating bot: %s", err)
+		}
+	}
+
+	if form.DisplayName != nil {
+		if err := util.ValidateDisplayName(*form.DisplayName); err != nil {
+			return nil, err
+		}
+		if err := p.db.UpdateOneByID(account.ID, "display_name", *form.DisplayName, &gtsmodel.Account{}); err != nil {
+			return nil, err
+		}
+	}
+
+	if form.Note != nil {
+		if err := util.ValidateNote(*form.Note); err != nil {
+			return nil, err
+		}
+		if err := p.db.UpdateOneByID(account.ID, "note", *form.Note, &gtsmodel.Account{}); err != nil {
+			return nil, err
+		}
+	}
+
+	if form.Avatar != nil && form.Avatar.Size != 0 {
+		avatarInfo, err := p.UpdateAvatar(form.Avatar, account.ID)
+		if err != nil {
+			return nil, err
+		}
+		l.Tracef("new avatar info for account %s is %+v", account.ID, avatarInfo)
+	}
+
+	if form.Header != nil && form.Header.Size != 0 {
+		headerInfo, err := p.UpdateHeader(form.Header, account.ID)
+		if err != nil {
+			return nil, err
+		}
+		l.Tracef("new header info for account %s is %+v", account.ID, headerInfo)
+	}
+
+	if form.Locked != nil {
+		if err := p.db.UpdateOneByID(account.ID, "locked", *form.Locked, &gtsmodel.Account{}); err != nil {
+			return nil, err
+		}
+	}
+
+	if form.Source != nil {
+		if form.Source.Language != nil {
+			if err := util.ValidateLanguage(*form.Source.Language); err != nil {
+				return nil, err
+			}
+			if err := p.db.UpdateOneByID(account.ID, "language", *form.Source.Language, &gtsmodel.Account{}); err != nil {
+				return nil, err
+			}
+		}
+
+		if form.Source.Sensitive != nil {
+			if err := p.db.UpdateOneByID(account.ID, "locked", *form.Locked, &gtsmodel.Account{}); err != nil {
+				return nil, err
+			}
+		}
+
+		if form.Source.Privacy != nil {
+			if err := util.ValidatePrivacy(*form.Source.Privacy); err != nil {
+				return nil, err
+			}
+			if err := p.db.UpdateOneByID(account.ID, "privacy", *form.Source.Privacy, &gtsmodel.Account{}); err != nil {
+				return nil, err
+			}
+		}
+	}
+
+	// fetch the account with all updated values set
+	updatedAccount := &gtsmodel.Account{}
+	if err := p.db.GetByID(account.ID, updatedAccount); err != nil {
+		return nil, fmt.Errorf("could not fetch updated account %s: %s", account.ID, err)
+	}
+
+	p.fromClientAPI <- gtsmodel.FromClientAPI{
+		APObjectType:   gtsmodel.ActivityStreamsProfile,
+		APActivityType: gtsmodel.ActivityStreamsUpdate,
+		GTSModel:       updatedAccount,
+		OriginAccount:  updatedAccount,
+	}
+
+	acctSensitive, err := p.tc.AccountToMastoSensitive(updatedAccount)
+	if err != nil {
+		return nil, fmt.Errorf("could not convert account into mastosensitive account: %s", err)
+	}
+	return acctSensitive, nil
+}
+
+// UpdateAvatar does the dirty work of checking the avatar part of an account update form,
+// parsing and checking the image, and doing the necessary updates in the database for this to become
+// the account's new avatar image.
+func (p *processor) UpdateAvatar(avatar *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error) {
+	var err error
+	if int(avatar.Size) > p.config.MediaConfig.MaxImageSize {
+		err = fmt.Errorf("avatar with size %d exceeded max image size of %d bytes", avatar.Size, p.config.MediaConfig.MaxImageSize)
+		return nil, err
+	}
+	f, err := avatar.Open()
+	if err != nil {
+		return nil, fmt.Errorf("could not read provided avatar: %s", err)
+	}
+
+	// extract the bytes
+	buf := new(bytes.Buffer)
+	size, err := io.Copy(buf, f)
+	if err != nil {
+		return nil, fmt.Errorf("could not read provided avatar: %s", err)
+	}
+	if size == 0 {
+		return nil, errors.New("could not read provided avatar: size 0 bytes")
+	}
+
+	// do the setting
+	avatarInfo, err := p.mediaHandler.ProcessHeaderOrAvatar(buf.Bytes(), accountID, media.Avatar, "")
+	if err != nil {
+		return nil, fmt.Errorf("error processing avatar: %s", err)
+	}
+
+	return avatarInfo, f.Close()
+}
+
+// UpdateHeader does the dirty work of checking the header part of an account update form,
+// parsing and checking the image, and doing the necessary updates in the database for this to become
+// the account's new header image.
+func (p *processor) UpdateHeader(header *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error) {
+	var err error
+	if int(header.Size) > p.config.MediaConfig.MaxImageSize {
+		err = fmt.Errorf("header with size %d exceeded max image size of %d bytes", header.Size, p.config.MediaConfig.MaxImageSize)
+		return nil, err
+	}
+	f, err := header.Open()
+	if err != nil {
+		return nil, fmt.Errorf("could not read provided header: %s", err)
+	}
+
+	// extract the bytes
+	buf := new(bytes.Buffer)
+	size, err := io.Copy(buf, f)
+	if err != nil {
+		return nil, fmt.Errorf("could not read provided header: %s", err)
+	}
+	if size == 0 {
+		return nil, errors.New("could not read provided header: size 0 bytes")
+	}
+
+	// do the setting
+	headerInfo, err := p.mediaHandler.ProcessHeaderOrAvatar(buf.Bytes(), accountID, media.Header, "")
+	if err != nil {
+		return nil, fmt.Errorf("error processing header: %s", err)
+	}
+
+	return headerInfo, f.Close()
+}

internal/processing/admin.go

@@ -19,55 +19,27 @@
 package processing
 
 import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
-	"github.com/superseriousbusiness/gotosocial/internal/id"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 )
 
 func (p *processor) AdminEmojiCreate(authed *oauth.Auth, form *apimodel.EmojiCreateRequest) (*apimodel.Emoji, error) {
-	if !authed.User.Admin {
-		return nil, fmt.Errorf("user %s not an admin", authed.User.ID)
-	}
-
-	// open the emoji and extract the bytes from it
-	f, err := form.Image.Open()
-	if err != nil {
-		return nil, fmt.Errorf("error opening emoji: %s", err)
-	}
-	buf := new(bytes.Buffer)
-	size, err := io.Copy(buf, f)
-	if err != nil {
-		return nil, fmt.Errorf("error reading emoji: %s", err)
-	}
-	if size == 0 {
-		return nil, errors.New("could not read provided emoji: size 0 bytes")
-	}
-
-	// allow the mediaHandler to work its magic of processing the emoji bytes, and putting them in whatever storage backend we're using
-	emoji, err := p.mediaHandler.ProcessLocalEmoji(buf.Bytes(), form.Shortcode)
-	if err != nil {
-		return nil, fmt.Errorf("error reading emoji: %s", err)
-	}
-
-	emojiID, err := id.NewULID()
-	if err != nil {
-		return nil, err
-	}
-	emoji.ID = emojiID
-
-	mastoEmoji, err := p.tc.EmojiToMasto(emoji)
-	if err != nil {
-		return nil, fmt.Errorf("error converting emoji to mastotype: %s", err)
-	}
-
-	if err := p.db.Put(emoji); err != nil {
-		return nil, fmt.Errorf("database error while processing emoji: %s", err)
-	}
-
-	return &mastoEmoji, nil
+	return p.adminProcessor.EmojiCreate(authed.Account, authed.User, form)
+}
+
+func (p *processor) AdminDomainBlockCreate(authed *oauth.Auth, form *apimodel.DomainBlockCreateRequest) (*apimodel.DomainBlock, gtserror.WithCode) {
+	return p.adminProcessor.DomainBlockCreate(authed.Account, form)
+}
+
+func (p *processor) AdminDomainBlocksGet(authed *oauth.Auth, export bool) ([]*apimodel.DomainBlock, gtserror.WithCode) {
+	return p.adminProcessor.DomainBlocksGet(authed.Account, export)
+}
+
+func (p *processor) AdminDomainBlockGet(authed *oauth.Auth, id string, export bool) (*apimodel.DomainBlock, gtserror.WithCode) {
+	return p.adminProcessor.DomainBlockGet(authed.Account, id, export)
+}
+
+func (p *processor) AdminDomainBlockDelete(authed *oauth.Auth, id string) (*apimodel.DomainBlock, gtserror.WithCode) {
+	return p.adminProcessor.DomainBlockDelete(authed.Account, id)
 }

internal/processing/admin/admin.go

@@ -0,0 +1,60 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package admin
+
+import (
+	"github.com/sirupsen/logrus"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+)
+
+// Processor wraps a bunch of functions for processing admin actions.
+type Processor interface {
+	DomainBlockCreate(account *gtsmodel.Account, form *apimodel.DomainBlockCreateRequest) (*apimodel.DomainBlock, gtserror.WithCode)
+	DomainBlocksGet(account *gtsmodel.Account, export bool) ([]*apimodel.DomainBlock, gtserror.WithCode)
+	DomainBlockGet(account *gtsmodel.Account, id string, export bool) (*apimodel.DomainBlock, gtserror.WithCode)
+	DomainBlockDelete(account *gtsmodel.Account, id string) (*apimodel.DomainBlock, gtserror.WithCode)
+	EmojiCreate(account *gtsmodel.Account, user *gtsmodel.User, form *apimodel.EmojiCreateRequest) (*apimodel.Emoji, error)
+}
+
+type processor struct {
+	tc            typeutils.TypeConverter
+	config        *config.Config
+	mediaHandler  media.Handler
+	fromClientAPI chan gtsmodel.FromClientAPI
+	db            db.DB
+	log           *logrus.Logger
+}
+
+// New returns a new admin processor.
+func New(db db.DB, tc typeutils.TypeConverter, mediaHandler media.Handler, fromClientAPI chan gtsmodel.FromClientAPI, config *config.Config, log *logrus.Logger) Processor {
+	return &processor{
+		tc:            tc,
+		config:        config,
+		mediaHandler:  mediaHandler,
+		fromClientAPI: fromClientAPI,
+		db:            db,
+		log:           log,
+	}
+}

internal/processing/admin/createdomainblock.go

@@ -0,0 +1,154 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package admin
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+)
+
+func (p *processor) DomainBlockCreate(account *gtsmodel.Account, form *apimodel.DomainBlockCreateRequest) (*apimodel.DomainBlock, gtserror.WithCode) {
+	// first check if we already have a block -- if err == nil we already had a block so we can skip a whole lot of work
+	domainBlock := &gtsmodel.DomainBlock{}
+	err := p.db.GetWhere([]db.Where{{Key: "domain", Value: form.Domain, CaseInsensitive: true}}, domainBlock)
+	if err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// something went wrong in the DB
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("DomainBlockCreate: db error checking for existence of domain block %s: %s", form.Domain, err))
+		}
+
+		// there's no block for this domain yet so create one
+		// note: we take a new ulid from timestamp here in case we need to sort blocks
+		blockID, err := id.NewULID()
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("DomainBlockCreate: error creating id for new domain block %s: %s", form.Domain, err))
+		}
+
+		domainBlock = &gtsmodel.DomainBlock{
+			ID:                 blockID,
+			Domain:             form.Domain,
+			CreatedByAccountID: account.ID,
+			PrivateComment:     form.PrivateComment,
+			PublicComment:      form.PublicComment,
+			Obfuscate:          form.Obfuscate,
+		}
+
+		// put the new block in the database
+		if err := p.db.Put(domainBlock); err != nil {
+			if _, ok := err.(db.ErrAlreadyExists); !ok {
+				// there's a real error creating the block
+				return nil, gtserror.NewErrorInternalError(fmt.Errorf("DomainBlockCreate: db error putting new domain block %s: %s", form.Domain, err))
+			}
+		}
+
+		// process the side effects of the domain block asynchronously since it might take a while
+		go p.initiateDomainBlockSideEffects(account, domainBlock) // TODO: add this to a queuing system so it can retry/resume
+	}
+
+	mastoDomainBlock, err := p.tc.DomainBlockToMasto(domainBlock, false)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(fmt.Errorf("DomainBlockCreate: error converting domain block to frontend/masto representation %s: %s", form.Domain, err))
+	}
+
+	return mastoDomainBlock, nil
+}
+
+// initiateDomainBlockSideEffects should be called asynchronously, to process the side effects of a domain block:
+//
+// 1. Strip most info away from the instance entry for the domain.
+// 2. Delete the instance account for that instance if it exists.
+// 3. Select all accounts from this instance and pass them through the delete functionality of the processor.
+func (p *processor) initiateDomainBlockSideEffects(account *gtsmodel.Account, block *gtsmodel.DomainBlock) {
+	l := p.log.WithFields(logrus.Fields{
+		"func":   "domainBlockProcessSideEffects",
+		"domain": block.Domain,
+	})
+
+	l.Debug("processing domain block side effects")
+
+	// if we have an instance entry for this domain, update it with the new block ID and clear all fields
+	instance := &gtsmodel.Instance{}
+	if err := p.db.GetWhere([]db.Where{{Key: "domain", Value: block.Domain, CaseInsensitive: true}}, instance); err == nil {
+		instance.Title = ""
+		instance.UpdatedAt = time.Now()
+		instance.SuspendedAt = time.Now()
+		instance.DomainBlockID = block.ID
+		instance.ShortDescription = ""
+		instance.Description = ""
+		instance.Terms = ""
+		instance.ContactEmail = ""
+		instance.ContactAccountUsername = ""
+		instance.ContactAccountID = ""
+		instance.Version = ""
+		if err := p.db.UpdateByID(instance.ID, instance); err != nil {
+			l.Errorf("domainBlockProcessSideEffects: db error updating instance: %s", err)
+		}
+		l.Debug("domainBlockProcessSideEffects: instance entry updated")
+	}
+
+	// if we have an instance account for this instance, delete it
+	if err := p.db.DeleteWhere([]db.Where{{Key: "username", Value: block.Domain, CaseInsensitive: true}}, &gtsmodel.Account{}); err != nil {
+		l.Errorf("domainBlockProcessSideEffects: db error removing instance account: %s", err)
+	}
+
+	// delete accounts through the normal account deletion system (which should also delete media + posts + remove posts from timelines)
+
+	limit := 20      // just select 20 accounts at a time so we don't nuke our DB/mem with one huge query
+	var maxID string // this is initially an empty string so we'll start at the top of accounts list (sorted by ID)
+
+selectAccountsLoop:
+	for {
+		accounts, err := p.db.GetAccountsForInstance(block.Domain, maxID, limit)
+		if err != nil {
+			if _, ok := err.(db.ErrNoEntries); ok {
+				// no accounts left for this instance so we're done
+				l.Infof("domainBlockProcessSideEffects: done iterating through accounts for domain %s", block.Domain)
+				break selectAccountsLoop
+			}
+			// an actual error has occurred
+			l.Errorf("domainBlockProcessSideEffects: db error selecting accounts for domain %s: %s", block.Domain, err)
+			break selectAccountsLoop
+		}
+
+		for i, a := range accounts {
+			l.Debugf("putting delete for account %s in the clientAPI channel", a.Username)
+
+			// pass the account delete through the client api channel for processing
+			p.fromClientAPI <- gtsmodel.FromClientAPI{
+				APObjectType:   gtsmodel.ActivityStreamsPerson,
+				APActivityType: gtsmodel.ActivityStreamsDelete,
+				GTSModel:       a,
+				OriginAccount:  account,
+				TargetAccount:  a,
+			}
+
+			// if this is the last account in the slice, set the maxID appropriately for the next query
+			if i == len(accounts)-1 {
+				maxID = a.ID
+			}
+		}
+	}
+}

internal/processing/admin/deletedomainblock.go

@@ -0,0 +1,36 @@
+package admin
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) DomainBlockDelete(account *gtsmodel.Account, id string) (*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlock := &gtsmodel.DomainBlock{}
+
+	if err := p.db.GetByID(id, domainBlock); err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		// there are no entries for this ID
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry for ID %s", id))
+	}
+
+	// prepare the domain block to return
+	mastoDomainBlock, err := p.tc.DomainBlockToMasto(domainBlock, false)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	// delete the domain block
+	if err := p.db.DeleteByID(id, domainBlock); err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	return mastoDomainBlock, nil
+}

internal/processing/admin/emoji.go

@@ -0,0 +1,73 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package admin
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/id"
+)
+
+func (p *processor) EmojiCreate(account *gtsmodel.Account, user *gtsmodel.User, form *apimodel.EmojiCreateRequest) (*apimodel.Emoji, error) {
+	if user.Admin {
+		return nil, fmt.Errorf("user %s not an admin", user.ID)
+	}
+
+	// open the emoji and extract the bytes from it
+	f, err := form.Image.Open()
+	if err != nil {
+		return nil, fmt.Errorf("error opening emoji: %s", err)
+	}
+	buf := new(bytes.Buffer)
+	size, err := io.Copy(buf, f)
+	if err != nil {
+		return nil, fmt.Errorf("error reading emoji: %s", err)
+	}
+	if size == 0 {
+		return nil, errors.New("could not read provided emoji: size 0 bytes")
+	}
+
+	// allow the mediaHandler to work its magic of processing the emoji bytes, and putting them in whatever storage backend we're using
+	emoji, err := p.mediaHandler.ProcessLocalEmoji(buf.Bytes(), form.Shortcode)
+	if err != nil {
+		return nil, fmt.Errorf("error reading emoji: %s", err)
+	}
+
+	emojiID, err := id.NewULID()
+	if err != nil {
+		return nil, err
+	}
+	emoji.ID = emojiID
+
+	mastoEmoji, err := p.tc.EmojiToMasto(emoji)
+	if err != nil {
+		return nil, fmt.Errorf("error converting emoji to mastotype: %s", err)
+	}
+
+	if err := p.db.Put(emoji); err != nil {
+		return nil, fmt.Errorf("database error while processing emoji: %s", err)
+	}
+
+	return &mastoEmoji, nil
+}

internal/processing/admin/getdomainblock.go

@@ -0,0 +1,30 @@
+package admin
+
+import (
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) DomainBlockGet(account *gtsmodel.Account, id string, export bool) (*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlock := &gtsmodel.DomainBlock{}
+
+	if err := p.db.GetByID(id, domainBlock); err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		// there are no entries for this ID
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("no entry for ID %s", id))
+	}
+
+	mastoDomainBlock, err := p.tc.DomainBlockToMasto(domainBlock, export)
+	if err != nil {
+		return nil, gtserror.NewErrorInternalError(err)
+	}
+
+	return mastoDomainBlock, nil
+}

internal/processing/admin/getdomainblocks.go

@@ -0,0 +1,30 @@
+package admin
+
+import (
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) DomainBlocksGet(account *gtsmodel.Account, export bool) ([]*apimodel.DomainBlock, gtserror.WithCode) {
+	domainBlocks := []*gtsmodel.DomainBlock{}
+
+	if err := p.db.GetAll(&domainBlocks); err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			// something has gone really wrong
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+	}
+
+	mastoDomainBlocks := []*apimodel.DomainBlock{}
+	for _, b := range domainBlocks {
+		mastoDomainBlock, err := p.tc.DomainBlockToMasto(b, export)
+		if err != nil {
+			return nil, gtserror.NewErrorInternalError(err)
+		}
+		mastoDomainBlocks = append(mastoDomainBlocks, mastoDomainBlock)
+	}
+
+	return mastoDomainBlocks, nil
+}

internal/processing/federation.go

@@ -20,6 +20,7 @@
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/http"
 	"net/url"
@@ -89,7 +90,7 @@ func (p *processor) dereferenceFediRequest(username string, requestingAccountURI
 	return requestingAccount, nil
 }
 
-func (p *processor) GetFediUser(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
+func (p *processor) GetFediUser(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -98,17 +99,17 @@ func (p *processor) GetFediUser(requestedUsername string, request *http.Request)
 
 	var requestedPerson vocab.ActivityStreamsPerson
 	var err error
-	if util.IsPublicKeyPath(request.URL) {
+	if util.IsPublicKeyPath(requestURL) {
 		// if it's a public key path, we don't need to authenticate but we'll only serve the bare minimum user profile needed for the public key
 		requestedPerson, err = p.tc.AccountToASMinimal(requestedAccount)
 		if err != nil {
 			return nil, gtserror.NewErrorInternalError(err)
 		}
-	} else if util.IsUserPath(request.URL) {
+	} else if util.IsUserPath(requestURL) {
 		// if it's a user path, we want to fully authenticate the request before we serve any data, and then we can serve a more complete profile
-		requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(requestedUsername, request)
-		if err != nil {
-			return nil, gtserror.NewErrorNotAuthorized(err)
+		requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
+		if err != nil || !authenticated {
+			return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
 		}
 
 		// if we're already handshaking/dereferencing a remote account, we can skip the dereferencing part
@@ -144,7 +145,7 @@ func (p *processor) GetFediUser(requestedUsername string, request *http.Request)
 	return data, nil
 }
 
-func (p *processor) GetFediFollowers(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
+func (p *processor) GetFediFollowers(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -152,9 +153,9 @@ func (p *processor) GetFediFollowers(requestedUsername string, request *http.Req
 	}
 
 	// authenticate the request
-	requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(requestedUsername, request)
-	if err != nil {
-		return nil, gtserror.NewErrorNotAuthorized(err)
+	requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
+	if err != nil || !authenticated {
+		return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
 	}
 
 	requestingAccount, err := p.dereferenceFediRequest(requestedUsername, requestingAccountURI)
@@ -189,7 +190,7 @@ func (p *processor) GetFediFollowers(requestedUsername string, request *http.Req
 	return data, nil
 }
 
-func (p *processor) GetFediFollowing(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode) {
+func (p *processor) GetFediFollowing(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -197,9 +198,9 @@ func (p *processor) GetFediFollowing(requestedUsername string, request *http.Req
 	}
 
 	// authenticate the request
-	requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(requestedUsername, request)
-	if err != nil {
-		return nil, gtserror.NewErrorNotAuthorized(err)
+	requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
+	if err != nil || !authenticated {
+		return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
 	}
 
 	requestingAccount, err := p.dereferenceFediRequest(requestedUsername, requestingAccountURI)
@@ -234,7 +235,7 @@ func (p *processor) GetFediFollowing(requestedUsername string, request *http.Req
 	return data, nil
 }
 
-func (p *processor) GetFediStatus(requestedUsername string, requestedStatusID string, request *http.Request) (interface{}, gtserror.WithCode) {
+func (p *processor) GetFediStatus(ctx context.Context, requestedUsername string, requestedStatusID string, requestURL *url.URL) (interface{}, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -242,9 +243,9 @@ func (p *processor) GetFediStatus(requestedUsername string, requestedStatusID st
 	}
 
 	// authenticate the request
-	requestingAccountURI, err := p.federator.AuthenticateFederatedRequest(requestedUsername, request)
-	if err != nil {
-		return nil, gtserror.NewErrorNotAuthorized(err)
+	requestingAccountURI, authenticated, err := p.federator.AuthenticateFederatedRequest(ctx, requestedUsername)
+	if err != nil || !authenticated {
+		return nil, gtserror.NewErrorNotAuthorized(errors.New("not authorized"), "not authorized")
 	}
 
 	requestingAccount, err := p.dereferenceFediRequest(requestedUsername, requestingAccountURI)
@@ -294,7 +295,7 @@ func (p *processor) GetFediStatus(requestedUsername string, requestedStatusID st
 	return data, nil
 }
 
-func (p *processor) GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode) {
+func (p *processor) GetWebfingerAccount(ctx context.Context, requestedUsername string, requestURL *url.URL) (*apimodel.WellKnownResponse, gtserror.WithCode) {
 	// get the account the request is referring to
 	requestedAccount := &gtsmodel.Account{}
 	if err := p.db.GetLocalAccountByUsername(requestedUsername, requestedAccount); err != nil {
@@ -356,6 +357,5 @@ func (p *processor) GetNodeInfo(request *http.Request) (*apimodel.Nodeinfo, gtse
 
 func (p *processor) InboxPost(ctx context.Context, w http.ResponseWriter, r *http.Request) (bool, error) {
 	contextWithChannel := context.WithValue(ctx, util.APFromFederatorChanKey, p.fromFederator)
-	posted, err := p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)
-	return posted, err
+	return p.federator.FederatingActor().PostInbox(contextWithChannel, w, r)
 }

internal/processing/fromclientapi.go

@@ -25,6 +25,7 @@
 	"net/url"
 
 	"github.com/go-fed/activity/streams"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
@@ -161,17 +162,69 @@ func (p *processor) processFromClientAPI(clientMsg gtsmodel.FromClientAPI) error
 				return errors.New("note was not parseable as *gtsmodel.Status")
 			}
 
+			if statusToDelete.GTSAuthorAccount == nil {
+				statusToDelete.GTSAuthorAccount = clientMsg.OriginAccount
+			}
+
+			// delete all attachments for this status
+			for _, a := range statusToDelete.Attachments {
+				if err := p.mediaProcessor.Delete(a); err != nil {
+					return err
+				}
+			}
+
+			// delete all mentions for this status
+			for _, m := range statusToDelete.Mentions {
+				if err := p.db.DeleteByID(m, &gtsmodel.Mention{}); err != nil {
+					return err
+				}
+			}
+
+			// delete all notifications for this status
+			if err := p.db.DeleteWhere([]db.Where{{Key: "status_id", Value: statusToDelete.ID}}, &[]*gtsmodel.Notification{}); err != nil {
+				return err
+			}
+
+			// delete this status from any and all timelines
 			if err := p.deleteStatusFromTimelines(statusToDelete); err != nil {
 				return err
 			}
 
-			return p.federateStatusDelete(statusToDelete, clientMsg.OriginAccount)
+			return p.federateStatusDelete(statusToDelete)
+		case gtsmodel.ActivityStreamsProfile, gtsmodel.ActivityStreamsPerson:
+			// DELETE ACCOUNT/PROFILE
+			accountToDelete, ok := clientMsg.GTSModel.(*gtsmodel.Account)
+			if !ok {
+				return errors.New("account was not parseable as *gtsmodel.Account")
+			}
+
+			var deletedBy string
+			if clientMsg.OriginAccount != nil {
+				deletedBy = clientMsg.OriginAccount.ID
+			}
+
+			return p.accountProcessor.Delete(accountToDelete, deletedBy)
 		}
 	}
 	return nil
 }
 
+// TODO: move all the below functions into federation.Federator
+
 func (p *processor) federateStatus(status *gtsmodel.Status) error {
+	if status.GTSAuthorAccount == nil {
+		a := &gtsmodel.Account{}
+		if err := p.db.GetByID(status.AccountID, a); err != nil {
+			return fmt.Errorf("federateStatus: error fetching status author account: %s", err)
+		}
+		status.GTSAuthorAccount = a
+	}
+
+	// do nothing if this isn't our status
+	if status.GTSAuthorAccount.Domain != "" {
+		return nil
+	}
+
 	asStatus, err := p.tc.StatusToAS(status)
 	if err != nil {
 		return fmt.Errorf("federateStatus: error converting status to as format: %s", err)
@@ -186,20 +239,33 @@ func (p *processor) federateStatus(status *gtsmodel.Status) error {
 	return err
 }
 
-func (p *processor) federateStatusDelete(status *gtsmodel.Status, originAccount *gtsmodel.Account) error {
+func (p *processor) federateStatusDelete(status *gtsmodel.Status) error {
+	if status.GTSAuthorAccount == nil {
+		a := &gtsmodel.Account{}
+		if err := p.db.GetByID(status.AccountID, a); err != nil {
+			return fmt.Errorf("federateStatus: error fetching status author account: %s", err)
+		}
+		status.GTSAuthorAccount = a
+	}
+
+	// do nothing if this isn't our status
+	if status.GTSAuthorAccount.Domain != "" {
+		return nil
+	}
+
 	asStatus, err := p.tc.StatusToAS(status)
 	if err != nil {
 		return fmt.Errorf("federateStatusDelete: error converting status to as format: %s", err)
 	}
 
-	outboxIRI, err := url.Parse(originAccount.OutboxURI)
+	outboxIRI, err := url.Parse(status.GTSAuthorAccount.OutboxURI)
 	if err != nil {
-		return fmt.Errorf("federateStatusDelete: error parsing outboxURI %s: %s", originAccount.OutboxURI, err)
+		return fmt.Errorf("federateStatusDelete: error parsing outboxURI %s: %s", status.GTSAuthorAccount.OutboxURI, err)
 	}
 
-	actorIRI, err := url.Parse(originAccount.URI)
+	actorIRI, err := url.Parse(status.GTSAuthorAccount.URI)
 	if err != nil {
-		return fmt.Errorf("federateStatusDelete: error parsing actorIRI %s: %s", originAccount.URI, err)
+		return fmt.Errorf("federateStatusDelete: error parsing actorIRI %s: %s", status.GTSAuthorAccount.URI, err)
 	}
 
 	// create a delete and set the appropriate actor on it
@@ -326,6 +392,11 @@ func (p *processor) federateUnfave(fave *gtsmodel.StatusFave, originAccount *gts
 }
 
 func (p *processor) federateUnannounce(boost *gtsmodel.Status, originAccount *gtsmodel.Account, targetAccount *gtsmodel.Account) error {
+	if originAccount.Domain != "" {
+		// nothing to do here
+		return nil
+	}
+
 	asAnnounce, err := p.tc.BoostToAS(boost, originAccount, targetAccount)
 	if err != nil {
 		return fmt.Errorf("federateUnannounce: error converting status to announce: %s", err)

internal/processing/fromfederator.go

@@ -21,7 +21,6 @@
 import (
 	"errors"
 	"fmt"
-	"net/url"
 
 	"github.com/sirupsen/logrus"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
@@ -49,7 +48,7 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			}
 
 			l.Debug("will now derefence incoming status")
-			if err := p.dereferenceStatusFields(incomingStatus, federatorMsg.ReceivingAccount.Username); err != nil {
+			if err := p.federator.DereferenceStatusFields(incomingStatus, federatorMsg.ReceivingAccount.Username); err != nil {
 				return fmt.Errorf("error dereferencing status from federator: %s", err)
 			}
 			if err := p.db.UpdateByID(incomingStatus.ID, incomingStatus); err != nil {
@@ -72,7 +71,7 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			}
 
 			l.Debug("will now derefence incoming account")
-			if err := p.dereferenceAccountFields(incomingAccount, "", false); err != nil {
+			if err := p.federator.DereferenceAccountFields(incomingAccount, "", false); err != nil {
 				return fmt.Errorf("error dereferencing account from federator: %s", err)
 			}
 			if err := p.db.UpdateByID(incomingAccount.ID, incomingAccount); err != nil {
@@ -105,7 +104,7 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 				return errors.New("announce was not parseable as *gtsmodel.Status")
 			}
 
-			if err := p.dereferenceAnnounce(incomingAnnounce, federatorMsg.ReceivingAccount.Username); err != nil {
+			if err := p.federator.DereferenceAnnounce(incomingAnnounce, federatorMsg.ReceivingAccount.Username); err != nil {
 				return fmt.Errorf("error dereferencing announce from federator: %s", err)
 			}
 
@@ -140,7 +139,7 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			}
 
 			l.Debug("will now derefence incoming account")
-			if err := p.dereferenceAccountFields(incomingAccount, federatorMsg.ReceivingAccount.Username, true); err != nil {
+			if err := p.federator.DereferenceAccountFields(incomingAccount, federatorMsg.ReceivingAccount.Username, true); err != nil {
 				return fmt.Errorf("error dereferencing account from federator: %s", err)
 			}
 			if err := p.db.UpdateByID(incomingAccount.ID, incomingAccount); err != nil {
@@ -160,6 +159,27 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 			if !ok {
 				return errors.New("note was not parseable as *gtsmodel.Status")
 			}
+
+			// delete all attachments for this status
+			for _, a := range statusToDelete.Attachments {
+				if err := p.mediaProcessor.Delete(a); err != nil {
+					return err
+				}
+			}
+
+			// delete all mentions for this status
+			for _, m := range statusToDelete.Mentions {
+				if err := p.db.DeleteByID(m, &gtsmodel.Mention{}); err != nil {
+					return err
+				}
+			}
+
+			// delete all notifications for this status
+			if err := p.db.DeleteWhere([]db.Where{{Key: "status_id", Value: statusToDelete.ID}}, &[]*gtsmodel.Notification{}); err != nil {
+				return err
+			}
+
+			// remove this status from any and all timelines
 			return p.deleteStatusFromTimelines(statusToDelete)
 		case gtsmodel.ActivityStreamsProfile:
 			// DELETE A PROFILE/ACCOUNT
@@ -183,299 +203,3 @@ func (p *processor) processFromFederator(federatorMsg gtsmodel.FromFederator) er
 
 	return nil
 }
-
-// dereferenceStatusFields fetches all the information we temporarily pinned to an incoming
-// federated status, back in the federating db's Create function.
-//
-// When a status comes in from the federation API, there are certain fields that
-// haven't been dereferenced yet, because we needed to provide a snappy synchronous
-// response to the caller. By the time it reaches this function though, it's being
-// processed asynchronously, so we have all the time in the world to fetch the various
-// bits and bobs that are attached to the status, and properly flesh it out, before we
-// send the status to any timelines and notify people.
-//
-// Things to dereference and fetch here:
-//
-// 1. Media attachments.
-// 2. Hashtags.
-// 3. Emojis.
-// 4. Mentions.
-// 5. Posting account.
-// 6. Replied-to-status.
-//
-// SIDE EFFECTS:
-// This function will deference all of the above, insert them in the database as necessary,
-// and attach them to the status. The status itself will not be added to the database yet,
-// that's up the caller to do.
-func (p *processor) dereferenceStatusFields(status *gtsmodel.Status, requestingUsername string) error {
-	l := p.log.WithFields(logrus.Fields{
-		"func":   "dereferenceStatusFields",
-		"status": fmt.Sprintf("%+v", status),
-	})
-	l.Debug("entering function")
-
-	t, err := p.federator.GetTransportForUser(requestingUsername)
-	if err != nil {
-		return fmt.Errorf("error creating transport: %s", err)
-	}
-
-	// the status should have an ID by now, but just in case it doesn't let's generate one here
-	// because we'll need it further down
-	if status.ID == "" {
-		newID, err := id.NewULIDFromTime(status.CreatedAt)
-		if err != nil {
-			return err
-		}
-		status.ID = newID
-	}
-
-	// 1. Media attachments.
-	//
-	// At this point we should know:
-	// * the media type of the file we're looking for (a.File.ContentType)
-	// * the blurhash (a.Blurhash)
-	// * the file type (a.Type)
-	// * the remote URL (a.RemoteURL)
-	// This should be enough to pass along to the media processor.
-	attachmentIDs := []string{}
-	for _, a := range status.GTSMediaAttachments {
-		l.Debugf("dereferencing attachment: %+v", a)
-
-		// it might have been processed elsewhere so check first if it's already in the database or not
-		maybeAttachment := &gtsmodel.MediaAttachment{}
-		err := p.db.GetWhere([]db.Where{{Key: "remote_url", Value: a.RemoteURL}}, maybeAttachment)
-		if err == nil {
-			// we already have it in the db, dereferenced, no need to do it again
-			l.Debugf("attachment already exists with id %s", maybeAttachment.ID)
-			attachmentIDs = append(attachmentIDs, maybeAttachment.ID)
-			continue
-		}
-		if _, ok := err.(db.ErrNoEntries); !ok {
-			// we have a real error
-			return fmt.Errorf("error checking db for existence of attachment with remote url %s: %s", a.RemoteURL, err)
-		}
-		// it just doesn't exist yet so carry on
-		l.Debug("attachment doesn't exist yet, calling ProcessRemoteAttachment", a)
-		deferencedAttachment, err := p.mediaHandler.ProcessRemoteAttachment(t, a, status.AccountID)
-		if err != nil {
-			p.log.Errorf("error dereferencing status attachment: %s", err)
-			continue
-		}
-		l.Debugf("dereferenced attachment: %+v", deferencedAttachment)
-		deferencedAttachment.StatusID = status.ID
-		deferencedAttachment.Description = a.Description
-		if err := p.db.Put(deferencedAttachment); err != nil {
-			return fmt.Errorf("error inserting dereferenced attachment with remote url %s: %s", a.RemoteURL, err)
-		}
-		attachmentIDs = append(attachmentIDs, deferencedAttachment.ID)
-	}
-	status.Attachments = attachmentIDs
-
-	// 2. Hashtags
-
-	// 3. Emojis
-
-	// 4. Mentions
-	// At this point, mentions should have the namestring and mentionedAccountURI set on them.
-	//
-	// We should dereference any accounts mentioned here which we don't have in our db yet, by their URI.
-	mentions := []string{}
-	for _, m := range status.GTSMentions {
-		if m.ID == "" {
-			mID, err := id.NewRandomULID()
-			if err != nil {
-				return err
-			}
-			m.ID = mID
-		}
-
-		uri, err := url.Parse(m.MentionedAccountURI)
-		if err != nil {
-			l.Debugf("error parsing mentioned account uri %s: %s", m.MentionedAccountURI, err)
-			continue
-		}
-
-		m.StatusID = status.ID
-		m.OriginAccountID = status.GTSAuthorAccount.ID
-		m.OriginAccountURI = status.GTSAuthorAccount.URI
-
-		targetAccount := &gtsmodel.Account{}
-		if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: uri.String()}}, targetAccount); err != nil {
-			// proper error
-			if _, ok := err.(db.ErrNoEntries); !ok {
-				return fmt.Errorf("db error checking for account with uri %s", uri.String())
-			}
-
-			// we just don't have it yet, so we should go get it....
-			accountable, err := p.federator.DereferenceRemoteAccount(requestingUsername, uri)
-			if err != nil {
-				// we can't dereference it so just skip it
-				l.Debugf("error dereferencing remote account with uri %s: %s", uri.String(), err)
-				continue
-			}
-
-			targetAccount, err = p.tc.ASRepresentationToAccount(accountable, false)
-			if err != nil {
-				l.Debugf("error converting remote account with uri %s into gts model: %s", uri.String(), err)
-				continue
-			}
-
-			targetAccountID, err := id.NewRandomULID()
-			if err != nil {
-				return err
-			}
-			targetAccount.ID = targetAccountID
-
-			if err := p.db.Put(targetAccount); err != nil {
-				return fmt.Errorf("db error inserting account with uri %s", uri.String())
-			}
-		}
-
-		// by this point, we know the targetAccount exists in our database with an ID :)
-		m.TargetAccountID = targetAccount.ID
-		if err := p.db.Put(m); err != nil {
-			return fmt.Errorf("error creating mention: %s", err)
-		}
-		mentions = append(mentions, m.ID)
-	}
-	status.Mentions = mentions
-
-	return nil
-}
-
-func (p *processor) dereferenceAccountFields(account *gtsmodel.Account, requestingUsername string, refresh bool) error {
-	l := p.log.WithFields(logrus.Fields{
-		"func":               "dereferenceAccountFields",
-		"requestingUsername": requestingUsername,
-	})
-
-	t, err := p.federator.GetTransportForUser(requestingUsername)
-	if err != nil {
-		return fmt.Errorf("error getting transport for user: %s", err)
-	}
-
-	// fetch the header and avatar
-	if err := p.fetchHeaderAndAviForAccount(account, t, refresh); err != nil {
-		// if this doesn't work, just skip it -- we can do it later
-		l.Debugf("error fetching header/avi for account: %s", err)
-	}
-
-	if err := p.db.UpdateByID(account.ID, account); err != nil {
-		return fmt.Errorf("error updating account in database: %s", err)
-	}
-
-	return nil
-}
-
-func (p *processor) dereferenceAnnounce(announce *gtsmodel.Status, requestingUsername string) error {
-	if announce.GTSBoostedStatus == nil || announce.GTSBoostedStatus.URI == "" {
-		// we can't do anything unfortunately
-		return errors.New("dereferenceAnnounce: no URI to dereference")
-	}
-
-	// check if we already have the boosted status in the database
-	boostedStatus := &gtsmodel.Status{}
-	err := p.db.GetWhere([]db.Where{{Key: "uri", Value: announce.GTSBoostedStatus.URI}}, boostedStatus)
-	if err == nil {
-		// nice, we already have it so we don't actually need to dereference it from remote
-		announce.Content = boostedStatus.Content
-		announce.ContentWarning = boostedStatus.ContentWarning
-		announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
-		announce.Sensitive = boostedStatus.Sensitive
-		announce.Language = boostedStatus.Language
-		announce.Text = boostedStatus.Text
-		announce.BoostOfID = boostedStatus.ID
-		announce.Visibility = boostedStatus.Visibility
-		announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
-		announce.GTSBoostedStatus = boostedStatus
-		return nil
-	}
-
-	// we don't have it so we need to dereference it
-	remoteStatusURI, err := url.Parse(announce.GTSBoostedStatus.URI)
-	if err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error parsing url %s: %s", announce.GTSBoostedStatus.URI, err)
-	}
-
-	statusable, err := p.federator.DereferenceRemoteStatus(requestingUsername, remoteStatusURI)
-	if err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error dereferencing remote status with id %s: %s", announce.GTSBoostedStatus.URI, err)
-	}
-
-	// make sure we have the author account in the db
-	attributedToProp := statusable.GetActivityStreamsAttributedTo()
-	for iter := attributedToProp.Begin(); iter != attributedToProp.End(); iter = iter.Next() {
-		accountURI := iter.GetIRI()
-		if accountURI == nil {
-			continue
-		}
-
-		if err := p.db.GetWhere([]db.Where{{Key: "uri", Value: accountURI.String()}}, &gtsmodel.Account{}); err == nil {
-			// we already have it, fine
-			continue
-		}
-
-		// we don't have the boosted status author account yet so dereference it
-		accountable, err := p.federator.DereferenceRemoteAccount(requestingUsername, accountURI)
-		if err != nil {
-			return fmt.Errorf("dereferenceAnnounce: error dereferencing remote account with id %s: %s", accountURI.String(), err)
-		}
-		account, err := p.tc.ASRepresentationToAccount(accountable, false)
-		if err != nil {
-			return fmt.Errorf("dereferenceAnnounce: error converting dereferenced account with id %s into account : %s", accountURI.String(), err)
-		}
-
-		accountID, err := id.NewRandomULID()
-		if err != nil {
-			return err
-		}
-		account.ID = accountID
-
-		if err := p.db.Put(account); err != nil {
-			return fmt.Errorf("dereferenceAnnounce: error putting dereferenced account with id %s into database : %s", accountURI.String(), err)
-		}
-
-		if err := p.dereferenceAccountFields(account, requestingUsername, false); err != nil {
-			return fmt.Errorf("dereferenceAnnounce: error dereferencing fields on account with id %s : %s", accountURI.String(), err)
-		}
-	}
-
-	// now convert the statusable into something we can understand
-	boostedStatus, err = p.tc.ASStatusToStatus(statusable)
-	if err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error converting dereferenced statusable with id %s into status : %s", announce.GTSBoostedStatus.URI, err)
-	}
-
-	boostedStatusID, err := id.NewULIDFromTime(boostedStatus.CreatedAt)
-	if err != nil {
-		return nil
-	}
-	boostedStatus.ID = boostedStatusID
-
-	if err := p.db.Put(boostedStatus); err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error putting dereferenced status with id %s into the db: %s", announce.GTSBoostedStatus.URI, err)
-	}
-
-	// now dereference additional fields straight away (we're already async here so we have time)
-	if err := p.dereferenceStatusFields(boostedStatus, requestingUsername); err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error dereferencing status fields for status with id %s: %s", announce.GTSBoostedStatus.URI, err)
-	}
-
-	// update with the newly dereferenced fields
-	if err := p.db.UpdateByID(boostedStatus.ID, boostedStatus); err != nil {
-		return fmt.Errorf("dereferenceAnnounce: error updating dereferenced status in the db: %s", err)
-	}
-
-	// we have everything we need!
-	announce.Content = boostedStatus.Content
-	announce.ContentWarning = boostedStatus.ContentWarning
-	announce.ActivityStreamsType = boostedStatus.ActivityStreamsType
-	announce.Sensitive = boostedStatus.Sensitive
-	announce.Language = boostedStatus.Language
-	announce.Text = boostedStatus.Text
-	announce.BoostOfID = boostedStatus.ID
-	announce.Visibility = boostedStatus.Visibility
-	announce.VisibilityAdvanced = boostedStatus.VisibilityAdvanced
-	announce.GTSBoostedStatus = boostedStatus
-	return nil
-}

internal/processing/instance.go

@@ -131,7 +131,7 @@ func (p *processor) InstancePatch(form *apimodel.InstanceSettingsUpdateRequest)
 
 	// process avatar if provided
 	if form.Avatar != nil && form.Avatar.Size != 0 {
-		_, err := p.updateAccountAvatar(form.Avatar, ia.ID)
+		_, err := p.accountProcessor.UpdateAvatar(form.Avatar, ia.ID)
 		if err != nil {
 			return nil, gtserror.NewErrorBadRequest(err, "error processing avatar")
 		}
@@ -139,7 +139,7 @@ func (p *processor) InstancePatch(form *apimodel.InstanceSettingsUpdateRequest)
 
 	// process header if provided
 	if form.Header != nil && form.Header.Size != 0 {
-		_, err := p.updateAccountHeader(form.Header, ia.ID)
+		_, err := p.accountProcessor.UpdateHeader(form.Header, ia.ID)
 		if err != nil {
 			return nil, gtserror.NewErrorBadRequest(err, "error processing header")
 		}

internal/processing/media.go

@@ -19,268 +19,23 @@
 package processing
 
 import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"strconv"
-	"strings"
-
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
-	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
-	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
 )
 
 func (p *processor) MediaCreate(authed *oauth.Auth, form *apimodel.AttachmentRequest) (*apimodel.Attachment, error) {
-	// First check this user/account is permitted to create media
-	// There's no point continuing otherwise.
-	//
-	// TODO: move this check to the oauth.Authed function and do it for all accounts
-	if authed.User.Disabled || !authed.User.Approved || !authed.Account.SuspendedAt.IsZero() {
-		return nil, errors.New("not authorized to post new media")
-	}
-
-	// open the attachment and extract the bytes from it
-	f, err := form.File.Open()
-	if err != nil {
-		return nil, fmt.Errorf("error opening attachment: %s", err)
-	}
-	buf := new(bytes.Buffer)
-	size, err := io.Copy(buf, f)
-	if err != nil {
-		return nil, fmt.Errorf("error reading attachment: %s", err)
-
-	}
-	if size == 0 {
-		return nil, errors.New("could not read provided attachment: size 0 bytes")
-	}
-
-	// allow the mediaHandler to work its magic of processing the attachment bytes, and putting them in whatever storage backend we're using
-	attachment, err := p.mediaHandler.ProcessAttachment(buf.Bytes(), authed.Account.ID, "")
-	if err != nil {
-		return nil, fmt.Errorf("error reading attachment: %s", err)
-	}
-
-	// now we need to add extra fields that the attachment processor doesn't know (from the form)
-	// TODO: handle this inside mediaHandler.ProcessAttachment (just pass more params to it)
-
-	// first description
-	attachment.Description = form.Description
-
-	// now parse the focus parameter
-	focusx, focusy, err := parseFocus(form.Focus)
-	if err != nil {
-		return nil, err
-	}
-	attachment.FileMeta.Focus.X = focusx
-	attachment.FileMeta.Focus.Y = focusy
-
-	// prepare the frontend representation now -- if there are any errors here at least we can bail without
-	// having already put something in the database and then having to clean it up again (eugh)
-	mastoAttachment, err := p.tc.AttachmentToMasto(attachment)
-	if err != nil {
-		return nil, fmt.Errorf("error parsing media attachment to frontend type: %s", err)
-	}
-
-	// now we can confidently put the attachment in the database
-	if err := p.db.Put(attachment); err != nil {
-		return nil, fmt.Errorf("error storing media attachment in db: %s", err)
-	}
-
-	return &mastoAttachment, nil
+	return p.mediaProcessor.Create(authed.Account, form)
 }
 
 func (p *processor) MediaGet(authed *oauth.Auth, mediaAttachmentID string) (*apimodel.Attachment, gtserror.WithCode) {
-	attachment := &gtsmodel.MediaAttachment{}
-	if err := p.db.GetByID(mediaAttachmentID, attachment); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			// attachment doesn't exist
-			return nil, gtserror.NewErrorNotFound(errors.New("attachment doesn't exist in the db"))
-		}
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("db error getting attachment: %s", err))
-	}
-
-	if attachment.AccountID != authed.Account.ID {
-		return nil, gtserror.NewErrorNotFound(errors.New("attachment not owned by requesting account"))
-	}
-
-	a, err := p.tc.AttachmentToMasto(attachment)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error converting attachment: %s", err))
-	}
-
-	return &a, nil
+	return p.mediaProcessor.GetMedia(authed.Account, mediaAttachmentID)
 }
 
 func (p *processor) MediaUpdate(authed *oauth.Auth, mediaAttachmentID string, form *apimodel.AttachmentUpdateRequest) (*apimodel.Attachment, gtserror.WithCode) {
-	attachment := &gtsmodel.MediaAttachment{}
-	if err := p.db.GetByID(mediaAttachmentID, attachment); err != nil {
-		if _, ok := err.(db.ErrNoEntries); ok {
-			// attachment doesn't exist
-			return nil, gtserror.NewErrorNotFound(errors.New("attachment doesn't exist in the db"))
-		}
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("db error getting attachment: %s", err))
-	}
-
-	if attachment.AccountID != authed.Account.ID {
-		return nil, gtserror.NewErrorNotFound(errors.New("attachment not owned by requesting account"))
-	}
-
-	if form.Description != nil {
-		attachment.Description = *form.Description
-		if err := p.db.UpdateByID(mediaAttachmentID, attachment); err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error updating description: %s", err))
-		}
-	}
-
-	if form.Focus != nil {
-		focusx, focusy, err := parseFocus(*form.Focus)
-		if err != nil {
-			return nil, gtserror.NewErrorBadRequest(err)
-		}
-		attachment.FileMeta.Focus.X = focusx
-		attachment.FileMeta.Focus.Y = focusy
-		if err := p.db.UpdateByID(mediaAttachmentID, attachment); err != nil {
-			return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error updating focus: %s", err))
-		}
-	}
-
-	a, err := p.tc.AttachmentToMasto(attachment)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error converting attachment: %s", err))
-	}
-
-	return &a, nil
+	return p.mediaProcessor.Update(authed.Account, mediaAttachmentID, form)
 }
 
 func (p *processor) FileGet(authed *oauth.Auth, form *apimodel.GetContentRequestForm) (*apimodel.Content, error) {
-	// parse the form fields
-	mediaSize, err := media.ParseMediaSize(form.MediaSize)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not valid", form.MediaSize))
-	}
-
-	mediaType, err := media.ParseMediaType(form.MediaType)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("media type %s not valid", form.MediaType))
-	}
-
-	spl := strings.Split(form.FileName, ".")
-	if len(spl) != 2 || spl[0] == "" || spl[1] == "" {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("file name %s not parseable", form.FileName))
-	}
-	wantedMediaID := spl[0]
-
-	// get the account that owns the media and make sure it's not suspended
-	acct := &gtsmodel.Account{}
-	if err := p.db.GetByID(form.AccountID, acct); err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("account with id %s could not be selected from the db: %s", form.AccountID, err))
-	}
-	if !acct.SuspendedAt.IsZero() {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("account with id %s is suspended", form.AccountID))
-	}
-
-	// make sure the requesting account and the media account don't block each other
-	if authed.Account != nil {
-		blocked, err := p.db.Blocked(authed.Account.ID, form.AccountID)
-		if err != nil {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("block status could not be established between accounts %s and %s: %s", form.AccountID, authed.Account.ID, err))
-		}
-		if blocked {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts %s and %s", form.AccountID, authed.Account.ID))
-		}
-	}
-
-	// the way we store emojis is a little different from the way we store other attachments,
-	// so we need to take different steps depending on the media type being requested
-	content := &apimodel.Content{}
-	var storagePath string
-	switch mediaType {
-	case media.Emoji:
-		e := &gtsmodel.Emoji{}
-		if err := p.db.GetByID(wantedMediaID, e); err != nil {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("emoji %s could not be taken from the db: %s", wantedMediaID, err))
-		}
-		if e.Disabled {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("emoji %s has been disabled", wantedMediaID))
-		}
-		switch mediaSize {
-		case media.Original:
-			content.ContentType = e.ImageContentType
-			storagePath = e.ImagePath
-		case media.Static:
-			content.ContentType = e.ImageStaticContentType
-			storagePath = e.ImageStaticPath
-		default:
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not recognized for emoji", mediaSize))
-		}
-	case media.Attachment, media.Header, media.Avatar:
-		a := &gtsmodel.MediaAttachment{}
-		if err := p.db.GetByID(wantedMediaID, a); err != nil {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("attachment %s could not be taken from the db: %s", wantedMediaID, err))
-		}
-		if a.AccountID != form.AccountID {
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("attachment %s is not owned by %s", wantedMediaID, form.AccountID))
-		}
-		switch mediaSize {
-		case media.Original:
-			content.ContentType = a.File.ContentType
-			storagePath = a.File.Path
-		case media.Small:
-			content.ContentType = a.Thumbnail.ContentType
-			storagePath = a.Thumbnail.Path
-		default:
-			return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not recognized for attachment", mediaSize))
-		}
-	}
-
-	bytes, err := p.storage.RetrieveFileFrom(storagePath)
-	if err != nil {
-		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error retrieving from storage: %s", err))
-	}
-
-	content.ContentLength = int64(len(bytes))
-	content.Content = bytes
-	return content, nil
-}
-
-func parseFocus(focus string) (focusx, focusy float32, err error) {
-	if focus == "" {
-		return
-	}
-	spl := strings.Split(focus, ",")
-	if len(spl) != 2 {
-		err = fmt.Errorf("improperly formatted focus %s", focus)
-		return
-	}
-	xStr := spl[0]
-	yStr := spl[1]
-	if xStr == "" || yStr == "" {
-		err = fmt.Errorf("improperly formatted focus %s", focus)
-		return
-	}
-	fx, err := strconv.ParseFloat(xStr, 32)
-	if err != nil {
-		err = fmt.Errorf("improperly formatted focus %s: %s", focus, err)
-		return
-	}
-	if fx > 1 || fx < -1 {
-		err = fmt.Errorf("improperly formatted focus %s", focus)
-		return
-	}
-	focusx = float32(fx)
-	fy, err := strconv.ParseFloat(yStr, 32)
-	if err != nil {
-		err = fmt.Errorf("improperly formatted focus %s: %s", focus, err)
-		return
-	}
-	if fy > 1 || fy < -1 {
-		err = fmt.Errorf("improperly formatted focus %s", focus)
-		return
-	}
-	focusy = float32(fy)
-	return
+	return p.mediaProcessor.GetFile(authed.Account, form)
 }

internal/processing/media/create.go

@@ -0,0 +1,79 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"bytes"
+	"errors"
+	"fmt"
+	"io"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Create(account *gtsmodel.Account, form *apimodel.AttachmentRequest) (*apimodel.Attachment, error) {
+	// open the attachment and extract the bytes from it
+	f, err := form.File.Open()
+	if err != nil {
+		return nil, fmt.Errorf("error opening attachment: %s", err)
+	}
+	buf := new(bytes.Buffer)
+	size, err := io.Copy(buf, f)
+	if err != nil {
+		return nil, fmt.Errorf("error reading attachment: %s", err)
+	}
+	if size == 0 {
+		return nil, errors.New("could not read provided attachment: size 0 bytes")
+	}
+
+	// allow the mediaHandler to work its magic of processing the attachment bytes, and putting them in whatever storage backend we're using
+	attachment, err := p.mediaHandler.ProcessAttachment(buf.Bytes(), account.ID, "")
+	if err != nil {
+		return nil, fmt.Errorf("error reading attachment: %s", err)
+	}
+
+	// now we need to add extra fields that the attachment processor doesn't know (from the form)
+	// TODO: handle this inside mediaHandler.ProcessAttachment (just pass more params to it)
+
+	// first description
+	attachment.Description = form.Description
+
+	// now parse the focus parameter
+	focusx, focusy, err := parseFocus(form.Focus)
+	if err != nil {
+		return nil, err
+	}
+	attachment.FileMeta.Focus.X = focusx
+	attachment.FileMeta.Focus.Y = focusy
+
+	// prepare the frontend representation now -- if there are any errors here at least we can bail without
+	// having already put something in the database and then having to clean it up again (eugh)
+	mastoAttachment, err := p.tc.AttachmentToMasto(attachment)
+	if err != nil {
+		return nil, fmt.Errorf("error parsing media attachment to frontend type: %s", err)
+	}
+
+	// now we can confidently put the attachment in the database
+	if err := p.db.Put(attachment); err != nil {
+		return nil, fmt.Errorf("error storing media attachment in db: %s", err)
+	}
+
+	return &mastoAttachment, nil
+}

internal/processing/media/delete.go

@@ -0,0 +1,51 @@
+package media
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Delete(mediaAttachmentID string) gtserror.WithCode {
+	a := &gtsmodel.MediaAttachment{}
+	if err := p.db.GetByID(mediaAttachmentID, a); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			// attachment already gone
+			return nil
+		}
+		// actual error
+		return gtserror.NewErrorInternalError(err)
+	}
+
+	errs := []string{}
+
+	// delete the thumbnail from storage
+	if a.Thumbnail.Path != "" {
+		if err := p.storage.RemoveFileAt(a.Thumbnail.Path); err != nil {
+			errs = append(errs, fmt.Sprintf("remove thumbnail at path %s: %s", a.Thumbnail.Path, err))
+		}
+	}
+
+	// delete the file from storage
+	if a.File.Path != "" {
+		if err := p.storage.RemoveFileAt(a.File.Path); err != nil {
+			errs = append(errs, fmt.Sprintf("remove file at path %s: %s", a.File.Path, err))
+		}
+	}
+
+	// delete the attachment
+	if err := p.db.DeleteByID(mediaAttachmentID, a); err != nil {
+		if _, ok := err.(db.ErrNoEntries); !ok {
+			errs = append(errs, fmt.Sprintf("remove attachment: %s", err))
+		}
+	}
+
+	if len(errs) != 0 {
+		return gtserror.NewErrorInternalError(fmt.Errorf("Delete: one or more errors removing attachment with id %s: %s", mediaAttachmentID, strings.Join(errs, "; ")))
+	}
+
+	return nil
+}

internal/processing/media/getfile.go

@@ -0,0 +1,120 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"fmt"
+	"strings"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+)
+
+func (p *processor) GetFile(account *gtsmodel.Account, form *apimodel.GetContentRequestForm) (*apimodel.Content, error) {
+	// parse the form fields
+	mediaSize, err := media.ParseMediaSize(form.MediaSize)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not valid", form.MediaSize))
+	}
+
+	mediaType, err := media.ParseMediaType(form.MediaType)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("media type %s not valid", form.MediaType))
+	}
+
+	spl := strings.Split(form.FileName, ".")
+	if len(spl) != 2 || spl[0] == "" || spl[1] == "" {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("file name %s not parseable", form.FileName))
+	}
+	wantedMediaID := spl[0]
+
+	// get the account that owns the media and make sure it's not suspended
+	acct := &gtsmodel.Account{}
+	if err := p.db.GetByID(form.AccountID, acct); err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("account with id %s could not be selected from the db: %s", form.AccountID, err))
+	}
+	if !acct.SuspendedAt.IsZero() {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("account with id %s is suspended", form.AccountID))
+	}
+
+	// make sure the requesting account and the media account don't block each other
+	if account != nil {
+		blocked, err := p.db.Blocked(account.ID, form.AccountID)
+		if err != nil {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("block status could not be established between accounts %s and %s: %s", form.AccountID, account.ID, err))
+		}
+		if blocked {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("block exists between accounts %s and %s", form.AccountID, account.ID))
+		}
+	}
+
+	// the way we store emojis is a little different from the way we store other attachments,
+	// so we need to take different steps depending on the media type being requested
+	content := &apimodel.Content{}
+	var storagePath string
+	switch mediaType {
+	case media.Emoji:
+		e := &gtsmodel.Emoji{}
+		if err := p.db.GetByID(wantedMediaID, e); err != nil {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("emoji %s could not be taken from the db: %s", wantedMediaID, err))
+		}
+		if e.Disabled {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("emoji %s has been disabled", wantedMediaID))
+		}
+		switch mediaSize {
+		case media.Original:
+			content.ContentType = e.ImageContentType
+			storagePath = e.ImagePath
+		case media.Static:
+			content.ContentType = e.ImageStaticContentType
+			storagePath = e.ImageStaticPath
+		default:
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not recognized for emoji", mediaSize))
+		}
+	case media.Attachment, media.Header, media.Avatar:
+		a := &gtsmodel.MediaAttachment{}
+		if err := p.db.GetByID(wantedMediaID, a); err != nil {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("attachment %s could not be taken from the db: %s", wantedMediaID, err))
+		}
+		if a.AccountID != form.AccountID {
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("attachment %s is not owned by %s", wantedMediaID, form.AccountID))
+		}
+		switch mediaSize {
+		case media.Original:
+			content.ContentType = a.File.ContentType
+			storagePath = a.File.Path
+		case media.Small:
+			content.ContentType = a.Thumbnail.ContentType
+			storagePath = a.Thumbnail.Path
+		default:
+			return nil, gtserror.NewErrorNotFound(fmt.Errorf("media size %s not recognized for attachment", mediaSize))
+		}
+	}
+
+	bytes, err := p.storage.RetrieveFileFrom(storagePath)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error retrieving from storage: %s", err))
+	}
+
+	content.ContentLength = int64(len(bytes))
+	content.Content = bytes
+	return content, nil
+}

internal/processing/media/getmedia.go

@@ -0,0 +1,51 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) GetMedia(account *gtsmodel.Account, mediaAttachmentID string) (*apimodel.Attachment, gtserror.WithCode) {
+	attachment := &gtsmodel.MediaAttachment{}
+	if err := p.db.GetByID(mediaAttachmentID, attachment); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			// attachment doesn't exist
+			return nil, gtserror.NewErrorNotFound(errors.New("attachment doesn't exist in the db"))
+		}
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("db error getting attachment: %s", err))
+	}
+
+	if attachment.AccountID != account.ID {
+		return nil, gtserror.NewErrorNotFound(errors.New("attachment not owned by requesting account"))
+	}
+
+	a, err := p.tc.AttachmentToMasto(attachment)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error converting attachment: %s", err))
+	}
+
+	return &a, nil
+}

internal/processing/media/media.go

@@ -0,0 +1,63 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"github.com/sirupsen/logrus"
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/blob"
+	"github.com/superseriousbusiness/gotosocial/internal/config"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+	"github.com/superseriousbusiness/gotosocial/internal/media"
+	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
+)
+
+// Processor wraps a bunch of functions for processing media actions.
+type Processor interface {
+	// Create creates a new media attachment belonging to the given account, using the request form.
+	Create(account *gtsmodel.Account, form *apimodel.AttachmentRequest) (*apimodel.Attachment, error)
+	// Delete deletes the media attachment with the given ID, including all files pertaining to that attachment.
+	Delete(mediaAttachmentID string) gtserror.WithCode
+	GetFile(account *gtsmodel.Account, form *apimodel.GetContentRequestForm) (*apimodel.Content, error)
+	GetMedia(account *gtsmodel.Account, mediaAttachmentID string) (*apimodel.Attachment, gtserror.WithCode)
+	Update(account *gtsmodel.Account, mediaAttachmentID string, form *apimodel.AttachmentUpdateRequest) (*apimodel.Attachment, gtserror.WithCode)
+}
+
+type processor struct {
+	tc           typeutils.TypeConverter
+	config       *config.Config
+	mediaHandler media.Handler
+	storage      blob.Storage
+	db           db.DB
+	log          *logrus.Logger
+}
+
+// New returns a new media processor.
+func New(db db.DB, tc typeutils.TypeConverter, mediaHandler media.Handler, storage blob.Storage, config *config.Config, log *logrus.Logger) Processor {
+	return &processor{
+		tc:           tc,
+		config:       config,
+		mediaHandler: mediaHandler,
+		storage:      storage,
+		db:           db,
+		log:          log,
+	}
+}

internal/processing/media/update.go

@@ -0,0 +1,70 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"errors"
+	"fmt"
+
+	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
+	"github.com/superseriousbusiness/gotosocial/internal/db"
+	"github.com/superseriousbusiness/gotosocial/internal/gtserror"
+	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
+)
+
+func (p *processor) Update(account *gtsmodel.Account, mediaAttachmentID string, form *apimodel.AttachmentUpdateRequest) (*apimodel.Attachment, gtserror.WithCode) {
+	attachment := &gtsmodel.MediaAttachment{}
+	if err := p.db.GetByID(mediaAttachmentID, attachment); err != nil {
+		if _, ok := err.(db.ErrNoEntries); ok {
+			// attachment doesn't exist
+			return nil, gtserror.NewErrorNotFound(errors.New("attachment doesn't exist in the db"))
+		}
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("db error getting attachment: %s", err))
+	}
+
+	if attachment.AccountID != account.ID {
+		return nil, gtserror.NewErrorNotFound(errors.New("attachment not owned by requesting account"))
+	}
+
+	if form.Description != nil {
+		attachment.Description = *form.Description
+		if err := p.db.UpdateByID(mediaAttachmentID, attachment); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error updating description: %s", err))
+		}
+	}
+
+	if form.Focus != nil {
+		focusx, focusy, err := parseFocus(*form.Focus)
+		if err != nil {
+			return nil, gtserror.NewErrorBadRequest(err)
+		}
+		attachment.FileMeta.Focus.X = focusx
+		attachment.FileMeta.Focus.Y = focusy
+		if err := p.db.UpdateByID(mediaAttachmentID, attachment); err != nil {
+			return nil, gtserror.NewErrorInternalError(fmt.Errorf("database error updating focus: %s", err))
+		}
+	}
+
+	a, err := p.tc.AttachmentToMasto(attachment)
+	if err != nil {
+		return nil, gtserror.NewErrorNotFound(fmt.Errorf("error converting attachment: %s", err))
+	}
+
+	return &a, nil
+}

internal/processing/media/util.go

@@ -0,0 +1,63 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package media
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+)
+
+func parseFocus(focus string) (focusx, focusy float32, err error) {
+	if focus == "" {
+		return
+	}
+	spl := strings.Split(focus, ",")
+	if len(spl) != 2 {
+		err = fmt.Errorf("improperly formatted focus %s", focus)
+		return
+	}
+	xStr := spl[0]
+	yStr := spl[1]
+	if xStr == "" || yStr == "" {
+		err = fmt.Errorf("improperly formatted focus %s", focus)
+		return
+	}
+	fx, err := strconv.ParseFloat(xStr, 32)
+	if err != nil {
+		err = fmt.Errorf("improperly formatted focus %s: %s", focus, err)
+		return
+	}
+	if fx > 1 || fx < -1 {
+		err = fmt.Errorf("improperly formatted focus %s", focus)
+		return
+	}
+	focusx = float32(fx)
+	fy, err := strconv.ParseFloat(yStr, 32)
+	if err != nil {
+		err = fmt.Errorf("improperly formatted focus %s: %s", focus, err)
+		return
+	}
+	if fy > 1 || fy < -1 {
+		err = fmt.Errorf("improperly formatted focus %s", focus)
+		return
+	}
+	focusy = float32(fy)
+	return
+}

internal/processing/processor.go

@@ -21,6 +21,7 @@
 import (
 	"context"
 	"net/http"
+	"net/url"
 
 	"github.com/sirupsen/logrus"
 	apimodel "github.com/superseriousbusiness/gotosocial/internal/api/model"
@@ -32,8 +33,11 @@
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 	"github.com/superseriousbusiness/gotosocial/internal/media"
 	"github.com/superseriousbusiness/gotosocial/internal/oauth"
-	"github.com/superseriousbusiness/gotosocial/internal/processing/synchronous/status"
-	"github.com/superseriousbusiness/gotosocial/internal/processing/synchronous/streaming"
+	"github.com/superseriousbusiness/gotosocial/internal/processing/account"
+	"github.com/superseriousbusiness/gotosocial/internal/processing/admin"
+	mediaProcessor "github.com/superseriousbusiness/gotosocial/internal/processing/media"
+	"github.com/superseriousbusiness/gotosocial/internal/processing/status"
+	"github.com/superseriousbusiness/gotosocial/internal/processing/streaming"
 	"github.com/superseriousbusiness/gotosocial/internal/timeline"
 	"github.com/superseriousbusiness/gotosocial/internal/typeutils"
 	"github.com/superseriousbusiness/gotosocial/internal/visibility"
@@ -81,6 +85,14 @@ type Processor interface {
 
 	// AdminEmojiCreate handles the creation of a new instance emoji by an admin, using the given form.
 	AdminEmojiCreate(authed *oauth.Auth, form *apimodel.EmojiCreateRequest) (*apimodel.Emoji, error)
+	// AdminDomainBlockCreate handles the creation of a new domain block by an admin, using the given form.
+	AdminDomainBlockCreate(authed *oauth.Auth, form *apimodel.DomainBlockCreateRequest) (*apimodel.DomainBlock, gtserror.WithCode)
+	// AdminDomainBlocksGet returns a list of currently blocked domains.
+	AdminDomainBlocksGet(authed *oauth.Auth, export bool) ([]*apimodel.DomainBlock, gtserror.WithCode)
+	// AdminDomainBlockGet returns one domain block, specified by ID.
+	AdminDomainBlockGet(authed *oauth.Auth, id string, export bool) (*apimodel.DomainBlock, gtserror.WithCode)
+	// AdminDomainBlockDelete deletes one domain block, specified by ID, returning the deleted domain block.
+	AdminDomainBlockDelete(authed *oauth.Auth, id string) (*apimodel.DomainBlock, gtserror.WithCode)
 
 	// AppCreate processes the creation of a new API application
 	AppCreate(authed *oauth.Auth, form *apimodel.ApplicationCreateRequest) (*apimodel.Application, error)
@@ -154,22 +166,22 @@ type Processor interface {
 
 	// GetFediUser handles the getting of a fedi/activitypub representation of a user/account, performing appropriate authentication
 	// before returning a JSON serializable interface to the caller.
-	GetFediUser(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode)
+	GetFediUser(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode)
 
 	// GetFediFollowers handles the getting of a fedi/activitypub representation of a user/account's followers, performing appropriate
 	// authentication before returning a JSON serializable interface to the caller.
-	GetFediFollowers(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode)
+	GetFediFollowers(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode)
 
 	// GetFediFollowing handles the getting of a fedi/activitypub representation of a user/account's following, performing appropriate
 	// authentication before returning a JSON serializable interface to the caller.
-	GetFediFollowing(requestedUsername string, request *http.Request) (interface{}, gtserror.WithCode)
+	GetFediFollowing(ctx context.Context, requestedUsername string, requestURL *url.URL) (interface{}, gtserror.WithCode)
 
 	// GetFediStatus handles the getting of a fedi/activitypub representation of a particular status, performing appropriate
 	// authentication before returning a JSON serializable interface to the caller.
-	GetFediStatus(requestedUsername string, requestedStatusID string, request *http.Request) (interface{}, gtserror.WithCode)
+	GetFediStatus(ctx context.Context, requestedUsername string, requestedStatusID string, requestURL *url.URL) (interface{}, gtserror.WithCode)
 
 	// GetWebfingerAccount handles the GET for a webfinger resource. Most commonly, it will be used for returning account lookups.
-	GetWebfingerAccount(requestedUsername string, request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode)
+	GetWebfingerAccount(ctx context.Context, requestedUsername string, requestURL *url.URL) (*apimodel.WellKnownResponse, gtserror.WithCode)
 
 	// GetNodeInfoRel returns a well known response giving the path to node info.
 	GetNodeInfoRel(request *http.Request) (*apimodel.WellKnownResponse, gtserror.WithCode)
@@ -210,8 +222,11 @@ type processor struct {
 		SUB-PROCESSORS
 	*/
 
+	accountProcessor   account.Processor
+	adminProcessor     admin.Processor
 	statusProcessor    status.Processor
 	streamingProcessor streaming.Processor
+	mediaProcessor     mediaProcessor.Processor
 }
 
 // NewProcessor returns a new Processor that uses the given federator and logger
@@ -222,6 +237,9 @@ func NewProcessor(config *config.Config, tc typeutils.TypeConverter, federator f
 
 	statusProcessor := status.New(db, tc, config, fromClientAPI, log)
 	streamingProcessor := streaming.New(db, tc, oauthServer, config, log)
+	accountProcessor := account.New(db, tc, mediaHandler, oauthServer, fromClientAPI, federator, config, log)
+	adminProcessor := admin.New(db, tc, mediaHandler, fromClientAPI, config, log)
+	mediaProcessor := mediaProcessor.New(db, tc, mediaHandler, storage, config, log)
 
 	return &processor{
 		fromClientAPI:   fromClientAPI,
@@ -238,8 +256,11 @@ func NewProcessor(config *config.Config, tc typeutils.TypeConverter, federator f
 		db:              db,
 		filter:          visibility.NewFilter(db, log),
 
+		accountProcessor:   accountProcessor,
+		adminProcessor:     adminProcessor,
 		statusProcessor:    statusProcessor,
 		streamingProcessor: streamingProcessor,
+		mediaProcessor:     mediaProcessor,
 	}
 }
 
@@ -251,14 +272,18 @@ func (p *processor) Start() error {
 			select {
 			case clientMsg := <-p.fromClientAPI:
 				p.log.Infof("received message FROM client API: %+v", clientMsg)
+				go func() {
 					if err := p.processFromClientAPI(clientMsg); err != nil {
 						p.log.Error(err)
 					}
+				}()
 			case federatorMsg := <-p.fromFederator:
 				p.log.Infof("received message FROM federator: %+v", federatorMsg)
+				go func() {
 					if err := p.processFromFederator(federatorMsg); err != nil {
 						p.log.Error(err)
 					}
+				}()
 			case <-p.stop:
 				break DistLoop
 			}

internal/processing/search.go

@@ -176,7 +176,7 @@ func (p *processor) searchStatusByURI(authed *oauth.Auth, uri *url.URL, resolve
 			}
 
 			// properly dereference everything in the status (media attachments etc)
-			if err := p.dereferenceStatusFields(status, authed.Account.Username); err != nil {
+			if err := p.federator.DereferenceStatusFields(status, authed.Account.Username); err != nil {
 				return nil, fmt.Errorf("error dereferencing status fields: %s", err)
 			}
 
@@ -223,7 +223,7 @@ func (p *processor) searchAccountByURI(authed *oauth.Auth, uri *url.URL, resolve
 			return nil, fmt.Errorf("searchAccountByURI: error inserting account with uri %s: %s", uri.String(), err)
 		}
 
-		if err := p.dereferenceAccountFields(account, authed.Account.Username, false); err != nil {
+		if err := p.federator.DereferenceAccountFields(account, authed.Account.Username, false); err != nil {
 			return nil, fmt.Errorf("searchAccountByURI: error further dereferencing account with uri %s: %s", uri.String(), err)
 		}
 
@@ -301,7 +301,7 @@ func (p *processor) searchAccountByMention(authed *oauth.Auth, mention string, r
 		}
 
 		// properly dereference all the fields on the account immediately
-		if err := p.dereferenceAccountFields(foundAccount, authed.Account.Username, true); err != nil {
+		if err := p.federator.DereferenceAccountFields(foundAccount, authed.Account.Username, true); err != nil {
 			return nil, fmt.Errorf("searchAccountByMention: error dereferencing fields on account with uri %s: %s", acctURI.String(), err)
 		}
 	}

internal/processing/status/delete.go

@@ -49,6 +49,7 @@ func (p *processor) Delete(account *gtsmodel.Account, targetStatusID string) (*a
 		APActivityType: gtsmodel.ActivityStreamsDelete,
 		GTSModel:       targetStatus,
 		OriginAccount:  account,
+		TargetAccount:  account,
 	}
 
 	return mastoStatus, nil

internal/processing/util.go

@@ -1,135 +0,0 @@
-/*
-   GoToSocial
-   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Affero General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Affero General Public License for more details.
-
-   You should have received a copy of the GNU Affero General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-package processing
-
-import (
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"mime/multipart"
-
-	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
-	"github.com/superseriousbusiness/gotosocial/internal/media"
-	"github.com/superseriousbusiness/gotosocial/internal/transport"
-)
-
-/*
-	HELPER FUNCTIONS
-*/
-
-// TODO: try to combine the below two functions because this is a lot of code repetition.
-
-// updateAccountAvatar does the dirty work of checking the avatar part of an account update form,
-// parsing and checking the image, and doing the necessary updates in the database for this to become
-// the account's new avatar image.
-func (p *processor) updateAccountAvatar(avatar *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error) {
-	var err error
-	if int(avatar.Size) > p.config.MediaConfig.MaxImageSize {
-		err = fmt.Errorf("avatar with size %d exceeded max image size of %d bytes", avatar.Size, p.config.MediaConfig.MaxImageSize)
-		return nil, err
-	}
-	f, err := avatar.Open()
-	if err != nil {
-		return nil, fmt.Errorf("could not read provided avatar: %s", err)
-	}
-
-	// extract the bytes
-	buf := new(bytes.Buffer)
-	size, err := io.Copy(buf, f)
-	if err != nil {
-		return nil, fmt.Errorf("could not read provided avatar: %s", err)
-	}
-	if size == 0 {
-		return nil, errors.New("could not read provided avatar: size 0 bytes")
-	}
-
-	// do the setting
-	avatarInfo, err := p.mediaHandler.ProcessHeaderOrAvatar(buf.Bytes(), accountID, media.Avatar, "")
-	if err != nil {
-		return nil, fmt.Errorf("error processing avatar: %s", err)
-	}
-
-	return avatarInfo, f.Close()
-}
-
-// updateAccountHeader does the dirty work of checking the header part of an account update form,
-// parsing and checking the image, and doing the necessary updates in the database for this to become
-// the account's new header image.
-func (p *processor) updateAccountHeader(header *multipart.FileHeader, accountID string) (*gtsmodel.MediaAttachment, error) {
-	var err error
-	if int(header.Size) > p.config.MediaConfig.MaxImageSize {
-		err = fmt.Errorf("header with size %d exceeded max image size of %d bytes", header.Size, p.config.MediaConfig.MaxImageSize)
-		return nil, err
-	}
-	f, err := header.Open()
-	if err != nil {
-		return nil, fmt.Errorf("could not read provided header: %s", err)
-	}
-
-	// extract the bytes
-	buf := new(bytes.Buffer)
-	size, err := io.Copy(buf, f)
-	if err != nil {
-		return nil, fmt.Errorf("could not read provided header: %s", err)
-	}
-	if size == 0 {
-		return nil, errors.New("could not read provided header: size 0 bytes")
-	}
-
-	// do the setting
-	headerInfo, err := p.mediaHandler.ProcessHeaderOrAvatar(buf.Bytes(), accountID, media.Header, "")
-	if err != nil {
-		return nil, fmt.Errorf("error processing header: %s", err)
-	}
-
-	return headerInfo, f.Close()
-}
-
-// fetchHeaderAndAviForAccount fetches the header and avatar for a remote account, using a transport
-// on behalf of requestingUsername.
-//
-// targetAccount's AvatarMediaAttachmentID and HeaderMediaAttachmentID will be updated as necessary.
-//
-// SIDE EFFECTS: remote header and avatar will be stored in local storage, and the database will be updated
-// to reflect the creation of these new attachments.
-func (p *processor) fetchHeaderAndAviForAccount(targetAccount *gtsmodel.Account, t transport.Transport, refresh bool) error {
-	if targetAccount.AvatarRemoteURL != "" && (targetAccount.AvatarMediaAttachmentID == "" || refresh) {
-		a, err := p.mediaHandler.ProcessRemoteHeaderOrAvatar(t, &gtsmodel.MediaAttachment{
-			RemoteURL: targetAccount.AvatarRemoteURL,
-			Avatar:    true,
-		}, targetAccount.ID)
-		if err != nil {
-			return fmt.Errorf("error processing avatar for user: %s", err)
-		}
-		targetAccount.AvatarMediaAttachmentID = a.ID
-	}
-
-	if targetAccount.HeaderRemoteURL != "" && (targetAccount.HeaderMediaAttachmentID == "" || refresh) {
-		a, err := p.mediaHandler.ProcessRemoteHeaderOrAvatar(t, &gtsmodel.MediaAttachment{
-			RemoteURL: targetAccount.HeaderRemoteURL,
-			Header:    true,
-		}, targetAccount.ID)
-		if err != nil {
-			return fmt.Errorf("error processing header for user: %s", err)
-		}
-		targetAccount.HeaderMediaAttachmentID = a.ID
-	}
-	return nil
-}

internal/typeutils/converter.go

@@ -76,6 +76,8 @@ type TypeConverter interface {
 	RelationshipToMasto(r *gtsmodel.Relationship) (*model.Relationship, error)
 	// NotificationToMasto converts a gts notification into a mastodon notification
 	NotificationToMasto(n *gtsmodel.Notification) (*model.Notification, error)
+	// DomainBlockTomasto converts a gts model domin block into a mastodon domain block, for serving at /api/v1/admin/domain_blocks
+	DomainBlockToMasto(b *gtsmodel.DomainBlock, export bool) (*model.DomainBlock, error)
 
 	/*
 		FRONTEND (mastodon) MODEL TO INTERNAL (gts) MODEL

internal/typeutils/internaltofrontend.go

@@ -644,3 +644,23 @@ func (c *converter) NotificationToMasto(n *gtsmodel.Notification) (*model.Notifi
 		Status:    mastoStatus,
 	}, nil
 }
+
+func (c *converter) DomainBlockToMasto(b *gtsmodel.DomainBlock, export bool) (*model.DomainBlock, error) {
+
+	domainBlock := &model.DomainBlock{
+		Domain:        b.Domain,
+		PublicComment: b.PublicComment,
+	}
+
+	// if we're exporting a domain block, return it with minimal information attached
+	if !export {
+		domainBlock.ID = b.ID
+		domainBlock.Obfuscate = b.Obfuscate
+		domainBlock.PrivateComment = b.PrivateComment
+		domainBlock.SubscriptionID = b.SubscriptionID
+		domainBlock.CreatedBy = b.CreatedByAccountID
+		domainBlock.CreatedAt = b.CreatedAt.Format(time.RFC3339)
+	}
+
+	return domainBlock, nil
+}

internal/util/uri.go

@@ -66,8 +66,8 @@
 	// APRequestingActorIRI can be used to set and retrieve the actor of an incoming federation request.
 	// This will usually be the owner of whatever activity is being posted.
 	APRequestingActorIRI APContextKey = "requestingActorIRI"
-	// APRequestingPublicKeyID can be used to set and retrieve the public key ID of an incoming federation request.
-	APRequestingPublicKeyID APContextKey = "requestingPublicKeyID"
+	// APRequestingPublicKeyVerifier can be used to set and retrieve the public key verifier of an incoming federation request.
+	APRequestingPublicKeyVerifier APContextKey = "requestingPublicKeyVerifier"
 	// APFromFederatorChanKey can be used to pass a pointer to the fromFederator channel into the federator for use in callbacks.
 	APFromFederatorChanKey APContextKey = "fromFederatorChan"
 )

internal/visibility/statusvisible.go

@@ -19,9 +19,20 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 	relevantAccounts, err := f.pullRelevantAccountsFromStatus(targetStatus)
 	if err != nil {
 		l.Debugf("error pulling relevant accounts for status %s: %s", targetStatus.ID, err)
+		return false, fmt.Errorf("error pulling relevant accounts for status %s: %s", targetStatus.ID, err)
 	}
-	targetAccount := relevantAccounts.StatusAuthor
 
+	domainBlocked, err := f.domainBlockedRelevant(relevantAccounts)
+	if err != nil {
+		l.Debugf("error checking domain block: %s", err)
+		return false, fmt.Errorf("error checking domain block: %s", err)
+	}
+
+	if domainBlocked {
+		return false, nil
+	}
+
+	targetAccount := relevantAccounts.StatusAuthor
 	// if target account is suspended then don't show the status
 	if !targetAccount.SuspendedAt.IsZero() {
 		l.Trace("target account suspended at is not zero")
@@ -123,8 +134,8 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 	}
 
 	// status boosts accounts id
-	if relevantAccounts.BoostedAccount != nil {
-		if blocked, err := f.db.Blocked(relevantAccounts.BoostedAccount.ID, requestingAccount.ID); err != nil {
+	if relevantAccounts.BoostedStatusAuthor != nil {
+		if blocked, err := f.db.Blocked(relevantAccounts.BoostedStatusAuthor.ID, requestingAccount.ID); err != nil {
 			return false, err
 		} else if blocked {
 			l.Trace("a block exists between requesting account and boosted account")
@@ -152,6 +163,16 @@ func (f *filter) StatusVisible(targetStatus *gtsmodel.Status, requestingAccount
 		}
 	}
 
+	// boost mentions accounts
+	for _, a := range relevantAccounts.BoostedMentionedAccounts {
+		if blocked, err := f.db.Blocked(a.ID, requestingAccount.ID); err != nil {
+			return false, err
+		} else if blocked {
+			l.Trace("a block exists between requesting account and a boosted mentioned account")
+			return false, nil
+		}
+	}
+
 	// if the requesting account is mentioned in the status it should always be visible
 	for _, acct := range relevantAccounts.MentionedAccounts {
 		if acct.ID == requestingAccount.ID {

internal/visibility/util.go

@@ -3,12 +3,14 @@
 import (
 	"fmt"
 
+	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/gtsmodel"
 )
 
 func (f *filter) pullRelevantAccountsFromStatus(targetStatus *gtsmodel.Status) (*relevantAccounts, error) {
 	accounts := &relevantAccounts{
 		MentionedAccounts:        []*gtsmodel.Account{},
+		BoostedMentionedAccounts: []*gtsmodel.Account{},
 	}
 
 	// get the author account
@@ -30,29 +32,6 @@ func (f *filter) pullRelevantAccountsFromStatus(targetStatus *gtsmodel.Status) (
 		accounts.ReplyToAccount = repliedToAccount
 	}
 
-	// get the boosted account from the status and add it to the pile
-	if targetStatus.BoostOfID != "" {
-		// retrieve the boosted status first
-		boostedStatus := &gtsmodel.Status{}
-		if err := f.db.GetByID(targetStatus.BoostOfID, boostedStatus); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatus with id %s: %s", targetStatus.BoostOfID, err)
-		}
-		boostedAccount := &gtsmodel.Account{}
-		if err := f.db.GetByID(boostedStatus.AccountID, boostedAccount); err != nil {
-			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedAccount with id %s: %s", boostedStatus.AccountID, err)
-		}
-		accounts.BoostedAccount = boostedAccount
-
-		// the boosted status might be a reply to another account so we should get that too
-		if boostedStatus.InReplyToAccountID != "" {
-			boostedStatusRepliedToAccount := &gtsmodel.Account{}
-			if err := f.db.GetByID(boostedStatus.InReplyToAccountID, boostedStatusRepliedToAccount); err != nil {
-				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatusRepliedToAccount with id %s: %s", boostedStatus.InReplyToAccountID, err)
-			}
-			accounts.BoostedReplyToAccount = boostedStatusRepliedToAccount
-		}
-	}
-
 	// now get all accounts with IDs that are mentioned in the status
 	for _, mentionID := range targetStatus.Mentions {
 
@@ -68,14 +47,145 @@ func (f *filter) pullRelevantAccountsFromStatus(targetStatus *gtsmodel.Status) (
 		accounts.MentionedAccounts = append(accounts.MentionedAccounts, mentionedAccount)
 	}
 
+	// get the boosted account from the status and add it to the pile
+	if targetStatus.BoostOfID != "" {
+		// retrieve the boosted status first
+		boostedStatus := &gtsmodel.Status{}
+		if err := f.db.GetByID(targetStatus.BoostOfID, boostedStatus); err != nil {
+			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatus with id %s: %s", targetStatus.BoostOfID, err)
+		}
+		boostedAccount := &gtsmodel.Account{}
+		if err := f.db.GetByID(boostedStatus.AccountID, boostedAccount); err != nil {
+			return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedAccount with id %s: %s", boostedStatus.AccountID, err)
+		}
+		accounts.BoostedStatusAuthor = boostedAccount
+
+		// the boosted status might be a reply to another account so we should get that too
+		if boostedStatus.InReplyToAccountID != "" {
+			boostedStatusRepliedToAccount := &gtsmodel.Account{}
+			if err := f.db.GetByID(boostedStatus.InReplyToAccountID, boostedStatusRepliedToAccount); err != nil {
+				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boostedStatusRepliedToAccount with id %s: %s", boostedStatus.InReplyToAccountID, err)
+			}
+			accounts.BoostedReplyToAccount = boostedStatusRepliedToAccount
+		}
+
+		// now get all accounts with IDs that are mentioned in the status
+		for _, mentionID := range boostedStatus.Mentions {
+			mention := &gtsmodel.Mention{}
+			if err := f.db.GetByID(mentionID, mention); err != nil {
+				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boosted mention with id %s: %s", mentionID, err)
+			}
+
+			mentionedAccount := &gtsmodel.Account{}
+			if err := f.db.GetByID(mention.TargetAccountID, mentionedAccount); err != nil {
+				return accounts, fmt.Errorf("PullRelevantAccountsFromStatus: error getting boosted mentioned account: %s", err)
+			}
+			accounts.BoostedMentionedAccounts = append(accounts.BoostedMentionedAccounts, mentionedAccount)
+		}
+	}
+
 	return accounts, nil
 }
 
 // relevantAccounts denotes accounts that are replied to, boosted by, or mentioned in a status.
 type relevantAccounts struct {
+	// Who wrote the status
 	StatusAuthor *gtsmodel.Account
+	// Who is the status replying to
 	ReplyToAccount *gtsmodel.Account
-	BoostedAccount        *gtsmodel.Account
-	BoostedReplyToAccount *gtsmodel.Account
+	// Which accounts are mentioned (tagged) in the status
 	MentionedAccounts []*gtsmodel.Account
+	// Who authed the boosted status
+	BoostedStatusAuthor *gtsmodel.Account
+	// If the boosted status replies to another account, who does it reply to?
+	BoostedReplyToAccount *gtsmodel.Account
+	// Who is mentioned (tagged) in the boosted status
+	BoostedMentionedAccounts []*gtsmodel.Account
+}
+
+// blockedDomain checks whether the given domain is blocked by us or not
+func (f *filter) blockedDomain(host string) (bool, error) {
+	b := &gtsmodel.DomainBlock{}
+	err := f.db.GetWhere([]db.Where{{Key: "domain", Value: host, CaseInsensitive: true}}, b)
+	if err == nil {
+		// block exists
+		return true, nil
+	}
+
+	if _, ok := err.(db.ErrNoEntries); ok {
+		// there are no entries so there's no block
+		return false, nil
+	}
+
+	// there's an actual error
+	return false, err
+}
+
+// domainBlockedRelevant checks through all relevant accounts attached to a status
+// to make sure none of them are domain blocked by this instance.
+//
+// Will return true+nil if there's a block, false+nil if there's no block, or
+// an error if something goes wrong.
+func (f *filter) domainBlockedRelevant(r *relevantAccounts) (bool, error) {
+	if r.StatusAuthor != nil {
+		b, err := f.blockedDomain(r.StatusAuthor.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	if r.ReplyToAccount != nil {
+		b, err := f.blockedDomain(r.ReplyToAccount.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	for _, a := range r.MentionedAccounts {
+		b, err := f.blockedDomain(a.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	if r.BoostedStatusAuthor != nil {
+		b, err := f.blockedDomain(r.BoostedStatusAuthor.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	if r.BoostedReplyToAccount != nil {
+		b, err := f.blockedDomain(r.BoostedReplyToAccount.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	for _, a := range r.BoostedMentionedAccounts {
+		b, err := f.blockedDomain(a.Domain)
+		if err != nil {
+			return false, err
+		}
+		if b {
+			return true, nil
+		}
+	}
+
+	return false, nil
 }

testrig/federator.go

@@ -19,12 +19,13 @@
 package testrig
 
 import (
+	"github.com/superseriousbusiness/gotosocial/internal/blob"
 	"github.com/superseriousbusiness/gotosocial/internal/db"
 	"github.com/superseriousbusiness/gotosocial/internal/federation"
 	"github.com/superseriousbusiness/gotosocial/internal/transport"
 )
 
 // NewTestFederator returns a federator with the given database and (mock!!) transport controller.
-func NewTestFederator(db db.DB, tc transport.Controller) federation.Federator {
-	return federation.NewFederator(db, NewTestFederatingDB(db), tc, NewTestConfig(), NewTestLog(), NewTestTypeConverter(db))
+func NewTestFederator(db db.DB, tc transport.Controller, storage blob.Storage) federation.Federator {
+	return federation.NewFederator(db, NewTestFederatingDB(db), tc, NewTestConfig(), NewTestLog(), NewTestTypeConverter(db), NewTestMediaHandler(db, storage))
 }