Clean up dangling wallpapers.

app/src/main/java/org/thoughtcrime/securesms/database/RecipientTable.kt

@@ -2073,6 +2073,36 @@ open class RecipientTable(context: Context, databaseHelper: SignalDatabase) : Da
       .run()
   }
 
+  /**
+   * A follow up to [migrateWallpaperUri]. This clears out any remaining wallpapers using the old URI scheme, which implies
+   * that they were not migrated, which would only happen if they could not be read or were no longer found (the latter being
+   * more common, as this would happen after restoring a backup).
+   */
+  fun clearMissingFileWallpapersPostMigration(): Int {
+    return writableDatabase
+      .update(TABLE_NAME)
+      .values(
+        WALLPAPER to null,
+        WALLPAPER_URI to null
+      )
+      .where("$WALLPAPER_URI LIKE ?", "%wallpaper%")
+      .run()
+  }
+
+  /**
+   * Our current backup system does not backup file wallpapers. So we should clear them post-restore to avoid any weird UI issues.
+   */
+  fun clearFileWallpapersPostBackupRestore() {
+    writableDatabase
+      .update(TABLE_NAME)
+      .values(
+        WALLPAPER to null,
+        WALLPAPER_URI to null
+      )
+      .where("$WALLPAPER_URI NOT NULL")
+      .run()
+  }
+
   fun getPhoneNumberDiscoverability(id: RecipientId): PhoneNumberDiscoverableState? {
     return readableDatabase
       .select(PHONE_NUMBER_DISCOVERABLE)

app/src/main/java/org/thoughtcrime/securesms/database/SignalDatabase.kt

@@ -300,6 +300,7 @@ open class SignalDatabase(private val context: Application, databaseSecret: Data
           instance!!.messageTable.trimEntriesForExpiredMessages()
           instance!!.reactionTable.deleteAbandonedReactions()
           instance!!.searchTable.fullyResetTables(useTransaction = false)
+          instance!!.recipientTable.clearFileWallpapersPostBackupRestore()
           instance!!.rawWritableDatabase.execSQL("DROP TABLE IF EXISTS key_value")
           instance!!.rawWritableDatabase.execSQL("DROP TABLE IF EXISTS megaphone")
           instance!!.rawWritableDatabase.execSQL("DROP TABLE IF EXISTS job_spec")