db: Give Artists a PlaylistState property

Signed-off-by: Anna Schumaker <Anna@NoWheyCreamery.com>

db/artist.py

@@ -1,23 +1,29 @@
 # Copyright 2021 (c) Anna Schumaker.
 #
 # Table: artists
-# +----------+------+------+
-# | artistid | name | sort |
-# +----------+------+------+
+# +----------+-----------+------+------+
+# | artistid | plstateid | name | sort |
+# +----------+-----------+------+------+
 #
 # Index: artist_index
 # +------------------+
 # | name -> artistid |
 # +------------------+
+from gi.repository import GObject
 from . import album
 from . import execute
 from . import objects
+from . import state
 
 class Artist(objects.Tag):
     def do_get_column(self, column):
         return execute(f"SELECT {column} FROM artists "
                         "WHERE artistid=?", [ self.rowid ])
 
+    @GObject.Property
+    def playlist_state(self):
+        return state.PlaylistState(self.get_column("plstateid"))
+
     def albums(self):
         cursor = execute(f"SELECT albumid FROM albums "
                           "WHERE artistid=?", [ self.rowid ])
@@ -31,16 +37,21 @@ class ArtistTable(objects.Table):
     def do_create(self):
         execute("CREATE TABLE IF NOT EXISTS artists "
                     "(artistid INTEGER PRIMARY KEY, "
+                    " plstateid INTEGER NOT NULL, "
                     " name TEXT UNIQUE, "
-                    " sort TEXT)")
+                    " sort TEXT, "
+                    " FOREIGN KEY(plstateid) REFERENCES playlist_states(plstateid))")
         execute("CREATE INDEX IF NOT EXISTS artist_index "
                 "ON artists(name)")
 
     def do_insert(self, name, sort):
-        return execute("INSERT INTO artists (name, sort) "
-                       "VALUES (?, ?)", (name, sort.casefold()))
+        plstate = state.Table.insert(random=False, loop=False)
+        return execute("INSERT INTO artists (plstateid, name, sort) "
+                       "VALUES (?, ?, ?)",
+                       [ int(plstate), name, sort.casefold() ])
 
     def do_delete(self, artist):
+        state.Table.delete(artist.playlist_state)
         return execute("DELETE FROM artists WHERE artistid=?", [ int(artist) ])
 
     def do_get(self, rowid):

db/test_artist.py

@@ -17,7 +17,7 @@ class TestArtistTable(unittest.TestCase):
 
     def test_artist_table_init(self):
         self.assertIsInstance(db.artist.Table, db.artist.ArtistTable)
-        db.execute("SELECT artistid,name,sort FROM artists")
+        db.execute("SELECT artistid,plstateid,name,sort FROM artists")
 
     def test_artist_table_insert(self):
         db.artist.Table.connect("row-inserted", self.on_row_inserted)
@@ -29,16 +29,19 @@ class TestArtistTable(unittest.TestCase):
 
         self.assertEqual(artist.name, "Test Artist")
         self.assertEqual(artist.sort, "test sort")
+        self.assertIsInstance(artist.playlist_state, db.state.PlaylistState)
 
         with self.assertRaises(sqlite3.IntegrityError):
             db.artist.Table.insert("Test Artist", "Test Sort")
 
     def test_artist_table_delete(self):
         artist = db.artist.Table.find("Test Artist", "Test Sort")
+        state  = artist.playlist_state
         db.artist.Table.connect("row-deleted", self.on_row_deleted)
 
         db.artist.Table.delete(artist)
         self.assertIsNone(db.artist.Table.lookup("Test Artist"))
+        self.assertIsNone(db.state.Table.get(int(state)))
 
     def test_artist_table_get(self):
         artist = db.artist.Table.insert("Test Artist", "Test Sort")