Merge f22cca069d2ebe5aadd3f551cf13e6b7d2b6bc41 into add0a6dc9b8360db480f76793fa928499bf51741

db/migrations/20260425115700_add_weight_addtime_playlist_tracks.sql

@@ -0,0 +1,48 @@
+-- +goose Up
+
+-- Add useful information to playlist tracks.
+--
+-- The fields:
+--   add_time   - The UTC time when the item was added to the playlist.
+--   weight     - A random integer generated by SQLite.
+--
+-- They allow:
+--   - Let users recall when they added the track to playlist. Navidrome
+--     currently doesn't store this information which might be important
+--     to music curators.
+--   - A fixed randomness to the playlist (shuffle) defined by the database.
+--   - Let user sort playlist by time added (last week, last month, last year),
+--     by a fixed random order (given by weight field), and also shuffle the
+--     playlist via the player as it is currently supported by players. UI for
+--     all these sorting modes currently doesn't exists, so lets build the
+--     information infrastructure first so the UI can be built on top of that.
+CREATE TABLE IF NOT EXISTS "playlist_tracks_new"
+(
+        id integer default 0 not null,
+        playlist_id varchar(255) not null
+                constraint playlist_tracks_playlist_id_fk
+                        references playlist
+                                on update cascade on delete cascade,
+        media_file_id varchar(255) not null,
+                constraint playlist_tracks_media_file_id_fk
+                        references media_file
+                                on update cascade on delete cascade,
+        missing boolean default 0 not null,
+
+        added_at TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
+
+        PRIMARY KEY (playlist_id, id)
+);
+
+-- Copy old table data into patched table; the new fields will be
+-- filled with defaults.
+INSERT INTO playlist_tracks_new (id,playlist_id,media_file_id,missing)
+SELECT id,playlist_id,media_file_id,missing FROM playlist_tracks;
+
+-- Drop old table
+DROP TABLE playlist_tracks;
+
+-- Put new table to work
+ALTER TABLE playlist_tracks_new RENAME TO playlist_tracks;
+
+SELECT 1;