From 1bb183c2aafe5f241b3d9961b23af7eb60b52b52 Mon Sep 17 00:00:00 2001
From: Andrey Meshkov <am@adguard.com>
Date: Mon, 20 Jul 2020 21:14:07 +0300
Subject: [PATCH] Auto-update interface

---
 home/control_update.go |  2 ++
 update/check.go        | 13 +++++++++++++
 update/updater.go      | 31 +++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+)
 create mode 100644 update/check.go
 create mode 100644 update/updater.go

diff --git a/home/control_update.go b/home/control_update.go
index 566b8327..e711884d 100644
--- a/home/control_update.go
+++ b/home/control_update.go
@@ -244,6 +244,8 @@ func getUpdateInfo(jsonData []byte) (*updateInfo, error) {
 	if runtime.GOOS == "windows" {
 		binName = "AdGuardHome.exe"
 	}
+
+	// TODO: This is a mistake, work dir can be different
 	u.curBinName = filepath.Join(workDir, binName)
 	if !util.FileExists(u.curBinName) {
 		return nil, fmt.Errorf("executable file %s doesn't exist", u.curBinName)
diff --git a/update/check.go b/update/check.go
new file mode 100644
index 00000000..56116459
--- /dev/null
+++ b/update/check.go
@@ -0,0 +1,13 @@
+package update
+
+type VersionInfo struct {
+	NewVersion           string
+	Announcement         string
+	AnnouncementURL      string
+	SelfUpdateMinVersion string
+	CanAutoUpdate        bool
+}
+
+func (u *Updater) GetVersionResponse() (VersionInfo, error) {
+	return VersionInfo{}, nil
+}
diff --git a/update/updater.go b/update/updater.go
new file mode 100644
index 00000000..5e8cdbcf
--- /dev/null
+++ b/update/updater.go
@@ -0,0 +1,31 @@
+package update
+
+import (
+	"os"
+	"path/filepath"
+)
+
+type Updater struct {
+	DisableUpdate bool
+
+	currentBinary string // current binary executable
+	workDir       string // updater work dir (where backup/upd dirs will be created)
+}
+
+// NewUpdater - creates a new instance of the Updater
+func NewUpdater(workDir string) *Updater {
+	return &Updater{
+		currentBinary: filepath.Base(os.Args[0]),
+		workDir:       workDir,
+	}
+}
+
+// DoUpdate - conducts the auto-update
+// 1. Downloads the update file
+// 2. Unpacks it and checks the contents
+// 3. Backups the current version and configuration
+// 4. Replaces the old files
+// 5. Restarts the service
+func (u *Updater) DoUpdate() error {
+	return nil
+}