MORE REFACTORING!! + some improvements

Signed-off-by: ari melody <ari@arimelody.me>

schema.sql

@@ -1,17 +1,18 @@
 --
 -- Artists (should be applicable to all art)
 --
-CREATE TABLE IF NOT EXISTS artists (
-    id text NOT NULL,
-    name text,
-    website text
+CREATE TABLE artist (
+    id uuid DEFAULT gen_random_uuid(),
+    name text NOT NULL,
+    website text,
+    avatar text
 );
-ALTER TABLE artists ADD CONSTRAINT artists_pk PRIMARY KEY (id);
+ALTER TABLE artist ADD CONSTRAINT artist_pk PRIMARY KEY (id);
 
 --
 -- Music releases
 --
-CREATE TABLE IF NOT EXISTS musicreleases (
+CREATE TABLE musicrelease (
     id character varying(64) NOT NULL,
     title text NOT NULL,
     description text,
@@ -21,50 +22,56 @@ CREATE TABLE IF NOT EXISTS musicreleases (
     buyname text,
     buylink text
 );
-ALTER TABLE musicreleases ADD CONSTRAINT musicreleases_pk PRIMARY KEY (id);
+ALTER TABLE musicrelease ADD CONSTRAINT musicrelease_pk PRIMARY KEY (id);
 
 --
 -- Music links (external platform links under a release)
 --
-CREATE TABLE IF NOT EXISTS musiclinks (
+CREATE TABLE musiclink (
     release character varying(64) NOT NULL,
     name text NOT NULL,
-    url text
+    url text NOT NULL
 );
-ALTER TABLE musiclinks ADD CONSTRAINT musiclinks_pk PRIMARY KEY (release, name);
+ALTER TABLE musiclink ADD CONSTRAINT musiclink_pk PRIMARY KEY (release, name);
 
 --
 -- Music credits (artist credits under a release)
 --
-CREATE TABLE IF NOT EXISTS musiccredits (
+CREATE TABLE musiccredit (
     release character varying(64) NOT NULL,
-    artist text NOT NULL,
-    role text,
-    is_primary boolean
+    artist uuid NOT NULL,
+    role text NOT NULL,
+    is_primary boolean DEFAULT false
 );
-ALTER TABLE musiccredits ADD CONSTRAINT musiccredits_pk PRIMARY KEY (release, artist);
+ALTER TABLE musiccredit ADD CONSTRAINT musiccredit_pk PRIMARY KEY (release, artist);
 
 --
 -- Music tracks (tracks under a release)
 --
-CREATE TABLE IF NOT EXISTS musictracks (
-    release character varying(64) NOT NULL,
-    number integer NOT NULL,
+CREATE TABLE musictrack (
+    id uuid DEFAULT gen_random_uuid(),
     title text NOT NULL,
     description text,
     lyrics text,
     preview_url text
 );
-ALTER TABLE musictracks ADD CONSTRAINT musictracks_pk PRIMARY KEY (release, number);
+ALTER TABLE musictrack ADD CONSTRAINT musictrack_pk PRIMARY KEY (id);
+
+--
+-- Music release/track pairs
+--
+CREATE TABLE musicreleasetrack (
+    release character varying(64) NOT NULL,
+    track uuid NOT NULL,
+    number integer NOT NULL
+);
+ALTER TABLE musicreleasetrack ADD CONSTRAINT musictrack_pk PRIMARY KEY (release, track);
 
 --
 -- Foreign keys
 --
-
-ALTER TABLE musiccredits ADD CONSTRAINT IF NOT EXISTS musiccredits_artist_fk FOREIGN KEY (artist) REFERENCES artists(id) ON DELETE CASCADE ON UPDATE CASCADE;
-
-ALTER TABLE musiccredits ADD CONSTRAINT IF NOT EXISTS musiccredits_release_fk FOREIGN KEY (release) REFERENCES musicreleases(id) ON DELETE CASCADE;
-
-ALTER TABLE musiclinks ADD CONSTRAINT IF NOT EXISTS musiclinks_release_fk FOREIGN KEY (release) REFERENCES musicreleases(id) ON UPDATE CASCADE ON DELETE CASCADE;
-
-ALTER TABLE musictracks ADD CONSTRAINT IF NOT EXISTS musictracks_release_fk FOREIGN KEY (release) REFERENCES musicreleases(id) ON DELETE CASCADE;
+ALTER TABLE musiccredit ADD CONSTRAINT musiccredit_artist_fk FOREIGN KEY (artist) REFERENCES artist(id) ON DELETE CASCADE ON UPDATE CASCADE;
+ALTER TABLE musiccredit ADD CONSTRAINT musiccredit_release_fk FOREIGN KEY (release) REFERENCES musicrelease(id) ON DELETE CASCADE;
+ALTER TABLE musiclink ADD CONSTRAINT musiclink_release_fk FOREIGN KEY (release) REFERENCES musicrelease(id) ON UPDATE CASCADE ON DELETE CASCADE;
+ALTER TABLE musicreleasetrack ADD CONSTRAINT music_pair_trackref_fk FOREIGN KEY (release) REFERENCES musicrelease(id) ON DELETE CASCADE;
+ALTER TABLE musicreleasetrack ADD CONSTRAINT music_pair_releaseref_fk FOREIGN KEY (track) REFERENCES musictrack(id) ON DELETE CASCADE;