improvements

migrations/0001_schema.sql

@@ -0,0 +1,40 @@
+-- DROP OWNED BY CURRENT_USER CASCADE;
+CREATE TYPE STAT AS ENUM ('waiting', 'p1turn', 'p2turn');
+
+CREATE TABLE IF NOT EXISTS players (
+    id CHAR(16) PRIMARY KEY,
+    board CHAR(10) [10],
+    room_code CHAR(4) NOT NULL,
+    abandoned BOOLEAN DEFAULT FALSE NOT NULL,
+    time TIMESTAMP DEFAULT NOW() NOT NULL
+);
+
+CREATE TABLE IF NOT EXISTS rooms (
+    code CHAR(4) PRIMARY KEY,
+    player1_id CHAR(16),
+    player2_id CHAR(16),
+    stat STAT DEFAULT 'waiting' NOT NULL,
+    CHECK (
+        (
+            player1_id IS DISTINCT
+            FROM player2_id
+        )
+        OR (
+            player1_id IS NULL
+            AND player2_id IS NULL
+        )
+    )
+);
+
+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 ON UPDATE CASCADE,
+    ADD CONSTRAINT fk_player2 FOREIGN KEY (player2_id) REFERENCES players (id) ON DELETE
+SET NULL ON UPDATE CASCADE;
+
+CREATE INDEX idx_player_room_code ON players (room_code);
+CREATE INDEX idx_room_status ON players (abandoned);