feat: db changes to accommodate new cross device syncing logic. (#450)

* feat: db changes to accommodate new syncing logic.

Using timestamp to sync is a bit skewed due to system clock etc and therefore there was a lot of issues with it such as removing a manga that shouldn't have been removed. Marking chapters as unread even though it was marked as a read. Hopefully by using versioning system it should eliminate those issues.

* chore: add new line.

* chore: remove isSyncing from Chapter/Manga model.

* chore: remove isSyncing leftover.

* chore: remove isSyncing.

* refactor: remove isSync guard.

Just use it directly to 1 now since we don't have the isSyncing field in Manga or Chapter.

* Lint and stuff

* Add missing ,

---------

Co-authored-by: AntsyLich <59261191+AntsyLich@users.noreply.github.com>

data/src/main/sqldelight/tachiyomi/migrations/2.sqm

@@ -0,0 +1,46 @@
+-- Mangas table
+ALTER TABLE mangas ADD COLUMN version INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE mangas ADD COLUMN is_syncing INTEGER NOT NULL DEFAULT 0;
+
+-- Chapters table
+ALTER TABLE chapters ADD COLUMN version INTEGER NOT NULL DEFAULT 0;
+ALTER TABLE chapters ADD COLUMN is_syncing INTEGER NOT NULL DEFAULT 0;
+
+-- Mangas triggers
+DROP TRIGGER IF EXISTS update_manga_version;
+CREATE TRIGGER update_manga_version AFTER UPDATE ON mangas
+BEGIN
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new._id AND new.is_syncing = 0 AND (
+        new.url != old.url OR
+        new.description != old.description OR
+        new.favorite != old.favorite
+    );
+END;
+
+-- Chapters triggers
+DROP TRIGGER IF EXISTS update_chapter_and_manga_version;
+CREATE TRIGGER update_chapter_and_manga_version AFTER UPDATE ON chapters
+WHEN new.is_syncing = 0 AND (
+    new.read != old.read OR
+    new.bookmark != old.bookmark OR
+    new.last_page_read != old.last_page_read
+)
+BEGIN
+    -- Update the chapter version
+    UPDATE chapters SET version = version + 1
+    WHERE _id = new._id;
+
+    -- Update the manga version
+    UPDATE mangas SET version = version + 1
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
+END;
+
+-- manga_categories table
+DROP TRIGGER IF EXISTS insert_manga_category_update_version;
+CREATE TRIGGER insert_manga_category_update_version AFTER INSERT ON mangas_categories
+BEGIN
+    UPDATE mangas
+    SET version = version + 1
+    WHERE _id = new.manga_id AND (SELECT is_syncing FROM mangas WHERE _id = new.manga_id) = 0;
+END;