owncast/controllers/auth/indieauth/client.go
2023-01-30 11:20:03 -08:00

105 lines
3 KiB
Go

package indieauth
import (
"encoding/json"
"fmt"
"io"
"net/http"
"github.com/owncast/owncast/auth"
ia "github.com/owncast/owncast/auth/indieauth"
"github.com/owncast/owncast/controllers"
"github.com/owncast/owncast/core/chat"
"github.com/owncast/owncast/core/user"
log "github.com/sirupsen/logrus"
)
// StartAuthFlow will begin the IndieAuth flow for the current user.
func StartAuthFlow(u user.User, w http.ResponseWriter, r *http.Request) {
type request struct {
AuthHost string `json:"authHost"`
}
type response struct {
Redirect string `json:"redirect"`
}
var authRequest request
p, err := io.ReadAll(r.Body)
if err != nil {
controllers.WriteSimpleResponse(w, false, err.Error())
return
}
if err := json.Unmarshal(p, &authRequest); err != nil {
controllers.WriteSimpleResponse(w, false, err.Error())
return
}
accessToken := r.URL.Query().Get("accessToken")
redirectURL, err := ia.StartAuthFlow(authRequest.AuthHost, u.ID, accessToken, u.DisplayName)
if err != nil {
controllers.WriteSimpleResponse(w, false, err.Error())
return
}
redirectResponse := response{
Redirect: redirectURL.String(),
}
controllers.WriteResponse(w, redirectResponse)
}
// HandleRedirect will handle the redirect from an IndieAuth server to
// continue the auth flow.
func HandleRedirect(w http.ResponseWriter, r *http.Request) {
state := r.URL.Query().Get("state")
code := r.URL.Query().Get("code")
request, response, err := ia.HandleCallbackCode(code, state)
if err != nil {
log.Debugln(err)
msg := `Unable to complete authentication. <a href="/">Go back.</a><hr/>`
_ = controllers.WriteString(w, msg, http.StatusBadRequest)
return
}
// Check if a user with this auth already exists, if so, log them in.
if u := auth.GetUserByAuth(response.Me, auth.IndieAuth); u != nil {
// Handle existing auth.
log.Debugln("user with provided indieauth already exists, logging them in")
// Update the current user's access token to point to the existing user id.
accessToken := request.CurrentAccessToken
userID := u.ID
if err := user.SetAccessTokenToOwner(accessToken, userID); err != nil {
controllers.WriteSimpleResponse(w, false, err.Error())
return
}
if request.DisplayName != u.DisplayName {
loginMessage := fmt.Sprintf("**%s** is now authenticated as **%s**", request.DisplayName, u.DisplayName)
if err := chat.SendSystemAction(loginMessage, true); err != nil {
log.Errorln(err)
}
}
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
return
}
// Otherwise, save this as new auth.
log.Debug("indieauth token does not already exist, saving it as a new one for the current user")
if err := auth.AddAuth(request.UserID, response.Me, auth.IndieAuth); err != nil {
controllers.WriteSimpleResponse(w, false, err.Error())
return
}
// Update the current user's authenticated flag so we can show it in
// the chat UI.
if err := user.SetUserAsAuthenticated(request.UserID); err != nil {
log.Errorln(err)
}
http.Redirect(w, r, "/", http.StatusTemporaryRedirect)
}