initial

db/db.go

@@ -0,0 +1,92 @@
+package db
+
+import (
+	"database/sql"
+	"fmt"
+	"log"
+
+	_ "github.com/mattn/go-sqlite3"
+)
+
+// New opens a SQLite database at the given path and runs schema migrations.
+func New(path string) (*sql.DB, error) {
+	db, err := sql.Open("sqlite3", path+"?_journal_mode=WAL&_foreign_keys=on")
+	if err != nil {
+		return nil, fmt.Errorf("open db: %w", err)
+	}
+
+	if err := db.Ping(); err != nil {
+		return nil, fmt.Errorf("ping db: %w", err)
+	}
+
+	if err := migrate(db); err != nil {
+		return nil, fmt.Errorf("migrate db: %w", err)
+	}
+
+	log.Println("database ready:", path)
+	return db, nil
+}
+
+func migrate(db *sql.DB) error {
+	schema := `
+	CREATE TABLE IF NOT EXISTS players (
+		id              INTEGER PRIMARY KEY AUTOINCREMENT,
+		client_id       TEXT    NOT NULL UNIQUE,
+		first_seen      TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
+		last_seen       TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
+		total_sessions  INTEGER NOT NULL DEFAULT 0
+	);
+	CREATE INDEX IF NOT EXISTS idx_players_client_id ON players(client_id);
+
+	CREATE TABLE IF NOT EXISTS player_ips (
+		id         INTEGER PRIMARY KEY AUTOINCREMENT,
+		player_id  INTEGER NOT NULL REFERENCES players(id) ON DELETE CASCADE,
+		ip_address TEXT    NOT NULL,
+		first_seen TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
+		last_seen  TEXT    NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%fZ', 'now')),
+		UNIQUE(player_id, ip_address)
+	);
+	CREATE INDEX IF NOT EXISTS idx_player_ips_ip ON player_ips(ip_address);
+
+	CREATE TABLE IF NOT EXISTS game_sessions (
+		id               TEXT    PRIMARY KEY,
+		player_id        INTEGER NOT NULL REFERENCES players(id) ON DELETE CASCADE,
+		score            INTEGER NOT NULL DEFAULT 0,
+		level_reached    INTEGER NOT NULL DEFAULT 1,
+		lives_used       INTEGER NOT NULL DEFAULT 0,
+		duration_seconds INTEGER NOT NULL DEFAULT 0,
+		end_reason       TEXT    NOT NULL DEFAULT 'death',
+		started_at       TEXT    NOT NULL,
+		ended_at         TEXT    NOT NULL
+	);
+	CREATE INDEX IF NOT EXISTS idx_game_sessions_score ON game_sessions(score DESC);
+	CREATE INDEX IF NOT EXISTS idx_game_sessions_player_ended ON game_sessions(player_id, ended_at DESC);
+
+	CREATE TABLE IF NOT EXISTS device_infos (
+		id                 INTEGER PRIMARY KEY AUTOINCREMENT,
+		session_id         TEXT    NOT NULL UNIQUE REFERENCES game_sessions(id) ON DELETE CASCADE,
+		ip_address         TEXT    NOT NULL DEFAULT '',
+		user_agent         TEXT    NOT NULL DEFAULT '',
+		platform           TEXT    NOT NULL DEFAULT '',
+		language           TEXT    NOT NULL DEFAULT '',
+		screen_width       INTEGER,
+		screen_height      INTEGER,
+		device_pixel_ratio REAL,
+		timezone           TEXT    NOT NULL DEFAULT '',
+		webgl_renderer     TEXT    NOT NULL DEFAULT '',
+		touch_support      INTEGER NOT NULL DEFAULT 0
+	);
+
+	CREATE TABLE IF NOT EXISTS high_scores (
+		id          INTEGER PRIMARY KEY AUTOINCREMENT,
+		player_id   INTEGER NOT NULL UNIQUE REFERENCES players(id) ON DELETE CASCADE,
+		score       INTEGER NOT NULL,
+		session_id  TEXT    REFERENCES game_sessions(id) ON DELETE SET NULL,
+		achieved_at TEXT    NOT NULL
+	);
+	CREATE INDEX IF NOT EXISTS idx_high_scores_score ON high_scores(score DESC);
+	`
+
+	_, err := db.Exec(schema)
+	return err
+}