feat: sync GIFv and saved GIF support

deploy/migrations/0081_saved_gif_order_and_legacy_cleanup.down.sql

@@ -0,0 +1,5 @@
+DROP INDEX IF EXISTS user_sticker_collections_order_idx;
+CREATE INDEX user_sticker_collections_order_idx
+  ON user_sticker_collections (owner_user_id, kind, used_at DESC);
+ALTER TABLE user_sticker_collections DROP COLUMN IF EXISTS order_key;
+DROP SEQUENCE IF EXISTS user_sticker_collections_order_key_seq;

deploy/migrations/0081_saved_gif_order_and_legacy_cleanup.up.sql

@@ -0,0 +1,81 @@
+CREATE SEQUENCE IF NOT EXISTS user_sticker_collections_order_key_seq;
+
+ALTER TABLE user_sticker_collections ADD COLUMN order_key bigint;
+
+WITH ordered AS (
+  SELECT ctid, row_number() OVER (
+    ORDER BY owner_user_id, kind, used_at, document_id
+  ) AS n
+  FROM user_sticker_collections
+)
+UPDATE user_sticker_collections AS c
+SET order_key = ordered.n
+FROM ordered
+WHERE c.ctid = ordered.ctid;
+
+SELECT setval(
+  'user_sticker_collections_order_key_seq',
+  GREATEST(COALESCE((SELECT max(order_key) FROM user_sticker_collections), 0), 1),
+  true
+);
+
+ALTER TABLE user_sticker_collections
+  ALTER COLUMN order_key SET DEFAULT nextval('user_sticker_collections_order_key_seq'),
+  ALTER COLUMN order_key SET NOT NULL;
+
+DROP INDEX IF EXISTS user_sticker_collections_order_idx;
+CREATE INDEX user_sticker_collections_order_idx
+  ON user_sticker_collections (owner_user_id, kind, order_key DESC);
+
+-- Saved GIFs must reference canonical GIFv documents. Remove dangling/raw-GIF
+-- entries explicitly instead of making getSavedGifs silently skip bad state.
+DELETE FROM user_sticker_collections AS c
+WHERE c.kind = 'gif'
+  AND NOT EXISTS (
+    SELECT 1
+    FROM documents AS d
+    WHERE d.id = c.document_id
+      AND lower(d.mime_type) = 'video/mp4'
+      AND EXISTS (
+        SELECT 1 FROM jsonb_array_elements(d.attributes) a
+        WHERE a->>'kind' = 'animated'
+      )
+      AND EXISTS (
+        SELECT 1 FROM jsonb_array_elements(d.attributes) a
+        WHERE a->>'kind' = 'video'
+          AND COALESCE((a->>'round_message')::boolean, false) = false
+          AND COALESCE((a->>'w')::int, 0) > 0
+          AND COALESCE((a->>'h')::int, 0) > 0
+          AND COALESCE((a->>'duration')::double precision, 0) > 0
+      )
+  );
+
+-- Legacy raw image/gif rows are ordinary files, not TDesktop GIFv. Repair the
+-- durable shared-media indexes without pretending their bytes were transcoded.
+DELETE FROM message_box_media AS i
+USING message_boxes AS b
+WHERE i.owner_user_id = b.owner_user_id
+  AND i.box_id = b.box_id
+  AND i.category = 3
+  AND lower(COALESCE(b.media #>> '{document,mime_type}', '')) = 'image/gif';
+
+INSERT INTO message_box_media (owner_user_id, box_id, peer_id, category, message_date)
+SELECT b.owner_user_id, b.box_id, b.peer_id, 4, b.message_date
+FROM message_boxes AS b
+WHERE NOT b.deleted
+  AND lower(COALESCE(b.media #>> '{document,mime_type}', '')) = 'image/gif'
+ON CONFLICT DO NOTHING;
+
+DELETE FROM channel_message_media AS i
+USING channel_messages AS m
+WHERE i.channel_id = m.channel_id
+  AND i.id = m.id
+  AND i.category = 3
+  AND lower(COALESCE(m.media #>> '{document,mime_type}', '')) = 'image/gif';
+
+INSERT INTO channel_message_media (channel_id, id, category, message_date)
+SELECT m.channel_id, m.id, 4, m.message_date
+FROM channel_messages AS m
+WHERE NOT m.deleted
+  AND lower(COALESCE(m.media #>> '{document,mime_type}', '')) = 'image/gif'
+ON CONFLICT DO NOTHING;