restore state on reload/new join

migrations/0001_battleship.sql

@@ -24,15 +24,21 @@ CREATE TABLE IF NOT EXISTS rooms (
     )
 );
 
+CREATE TABLE IF NOT EXISTS abandoned_players (
+    time TIMESTAMP PRIMARY KEY,
+    id CHAR(16) NOT NULL,
+    CONSTRAINT fk_player_id FOREIGN KEY (id) REFERENCES players (id) ON DELETE CASCADE ON UPDATE CASCADE
+);
+
 ALTER TABLE players
 ADD CONSTRAINT fk_room_code FOREIGN KEY (room_code) REFERENCES rooms (code) ON DELETE
 SET NULL;
 
 ALTER TABLE rooms
 ADD CONSTRAINT fk_player1 FOREIGN KEY (player1_id) REFERENCES players (id) ON DELETE
-SET NULL,
+SET NULL ON UPDATE CASCADE,
     ADD CONSTRAINT fk_player2 FOREIGN KEY (player2_id) REFERENCES players (id) ON DELETE
-SET NULL;
+SET NULL ON UPDATE CASCADE;
 
 -- delete room if both players are null
 CREATE OR REPLACE FUNCTION delete_room() RETURNS TRIGGER AS $$ BEGIN IF (