add migration to remove the small thumbs path

+ misc

app/migrations/v1_3_0/__init__.py

@@ -1,11 +1,14 @@
 import json
-from sqlite3 import OperationalError
+import os
+import shutil
 import time
 from collections import OrderedDict
+from sqlite3 import OperationalError
 from typing import Generator
 
 from app.db.sqlite.utils import SQLiteManager
 from app.migrations.base import Migration
+from app.settings import Paths
 from app.utils.decorators import coroutine
 from app.utils.hashing import create_hash
 
@@ -20,13 +23,30 @@ from app.utils.hashing import create_hash
 # 6: trackhashes
 
 
+class RemoveSmallThumbnailFolder(Migration):
+    """
+    Removes the small thumbnail folder.
+
+    Because we are added a new folder "original" in the same directory, and the small thumbs folder is used to check if an album's thumbnail is already extracted.
+
+    So we need to remove it, to force the app to extract thumbnails for all albums.
+    """
+
+    @staticmethod
+    def migrate():
+        path = Paths.get_sm_thumb_path()
+
+        if os.path.exists(path):
+            shutil.rmtree(path)
+
+        os.mkdir(path)
+
+
 class RemovePlaylistArtistHashes(Migration):
     """
     removes the artisthashes column from the playlists table.
     """
 
-    name = "RemovePlaylistArtistHashes"
-
     @staticmethod
     def migrate():
         # remove artisthashes column
@@ -47,8 +67,6 @@ class AddSettingsToPlaylistTable(Migration):
     to the playlists table.
     """
 
-    name = "AddSettingsToPlaylistTable"
-
     @staticmethod
     def migrate():
         # existing_playlists = []
@@ -126,8 +144,6 @@ class AddLastUpdatedToTrackTable(Migration):
     adds the last modified column to the tracks table.
     """
 
-    name = "AddLastUpdatedToTrackTable"
-
     @staticmethod
     def migrate():
         # add last_mod column and default to current timestamp
@@ -148,8 +164,6 @@ class MovePlaylistsAndFavoritesTo10BitHashes(Migration):
     moves the playlists and favorites to 10 bit hashes.
     """
 
-    name = "MovePlaylistsAndFavoritesTo10BitHashes"
-
     @staticmethod
     def migrate():
         def get_track_data_by_hash(trackhash: str, tracks: list[tuple]) -> tuple:
@@ -257,8 +271,6 @@ class RemoveAllTracks(Migration):
     removes all tracks from the tracks table.
     """
 
-    name = "RemoveAllTracks"
-
     @staticmethod
     def migrate():
         sql = "DELETE FROM tracks"