Make backup include preview images

bookmarks/management/commands/full_backup.py

@@ -48,6 +48,19 @@ def handle(self, *args, **options):
                         file_path = os.path.join(root, file)
                         zip_file.write(file_path, os.path.join("favicons", file))
 
+            # Backup the previews folder
+            if not os.path.exists(os.path.join("data", "previews")):
+                self.stdout.write(
+                    self.style.WARNING("No previews folder found. Skipping...")
+                )
+            else:
+                self.stdout.write("Backup bookmark previews...")
+                previews_folder = os.path.join("data", "previews")
+                for root, _, files in os.walk(previews_folder):
+                    for file in files:
+                        file_path = os.path.join(root, file)
+                        zip_file.write(file_path, os.path.join("previews", file))
+
         self.stdout.write(self.style.SUCCESS(f"Backup created at {backup_file}"))
 
     def backup_database(self, backup_db_file):

docs/backup.md

@@ -8,12 +8,13 @@ The data folder contains the following contents that are relevant for backups:
 - `db.sqlite3` - the SQLite database
 - `assets` - folder that contains HTML snapshots of bookmarks
 - `favicons` - folder that contains downloaded favicons
+- `previews` - folder that contains downloaded preview images
 
 The following sections explain how to back up the individual contents.
 
 ## Full backup
 
-linkding provides a CLI command to create a full backup of the data folder. This creates a zip file that contains backups of the database, assets, and favicons.
+linkding provides a CLI command to create a full backup of the data folder. This creates a zip file that contains backups of the database, assets, favicons, and preview images.
 
 > [!NOTE]
 > This method assumes that you are using the default SQLite database.
@@ -90,7 +91,7 @@ This is the least technical option to back up bookmarks, but has several limitat
 - It only exports your own bookmarks, not those of other users.
 - It does not export URLs of snapshots on the Internet Archive Wayback machine.
 - It does not export HTML snapshots of bookmarks. Even if you backup and restore the assets folder, the bookmarks will not be linked to the snapshots anymore.
-- It does not export favicons.
+- It does not export favicons or preview images.
 
 Only use this method if you are fine with the above limitations.