Postgres

server/webpush_store_sqlite.go

@@ -0,0 +1,126 @@
+package server
+
+import (
+	"database/sql"
+
+	_ "github.com/mattn/go-sqlite3" // SQLite driver
+)
+
+// SQLite-specific queries
+const (
+	sqliteCreateWebPushSubscriptionsTableQuery = `
+		BEGIN;
+		CREATE TABLE IF NOT EXISTS subscription (
+			id TEXT PRIMARY KEY,
+			endpoint TEXT NOT NULL,
+			key_auth TEXT NOT NULL,
+			key_p256dh TEXT NOT NULL,
+			user_id TEXT NOT NULL,		
+			subscriber_ip TEXT NOT NULL,
+			updated_at INT NOT NULL,
+			warned_at INT NOT NULL DEFAULT 0
+		);
+		CREATE UNIQUE INDEX IF NOT EXISTS idx_endpoint ON subscription (endpoint);
+		CREATE INDEX IF NOT EXISTS idx_subscriber_ip ON subscription (subscriber_ip);
+		CREATE TABLE IF NOT EXISTS subscription_topic (
+			subscription_id TEXT NOT NULL,
+			topic TEXT NOT NULL,
+			PRIMARY KEY (subscription_id, topic),
+			FOREIGN KEY (subscription_id) REFERENCES subscription (id) ON DELETE CASCADE
+		);
+		CREATE INDEX IF NOT EXISTS idx_topic ON subscription_topic (topic);
+		CREATE TABLE IF NOT EXISTS schemaVersion (
+			id INT PRIMARY KEY,
+			version INT NOT NULL
+		);			
+		COMMIT;
+	`
+	sqliteWebPushBuiltinStartupQueries = `
+		PRAGMA foreign_keys = ON;
+	`
+
+	// Schema management queries
+	sqliteCurrentWebPushSchemaVersion     = 1
+	sqliteInsertWebPushSchemaVersion      = `INSERT INTO schemaVersion VALUES (1, ?)`
+	sqliteSelectWebPushSchemaVersionQuery = `SELECT version FROM schemaVersion WHERE id = 1`
+)
+
+// SQLite-specific webpush queries
+var sqliteWebPushQueries = &webPushQueries{
+	selectSubscriptionIDByEndpoint:        `SELECT id FROM subscription WHERE endpoint = ?`,
+	selectSubscriptionCountBySubscriberIP: `SELECT COUNT(*) FROM subscription WHERE subscriber_ip = ?`,
+	selectSubscriptionsForTopic: `
+		SELECT id, endpoint, key_auth, key_p256dh, user_id
+		FROM subscription_topic st
+		JOIN subscription s ON s.id = st.subscription_id
+		WHERE st.topic = ?
+		ORDER BY endpoint
+	`,
+	selectSubscriptionsExpiringSoon: `
+		SELECT id, endpoint, key_auth, key_p256dh, user_id 
+		FROM subscription 
+		WHERE warned_at = 0 AND updated_at <= ?
+	`,
+	insertSubscription: `
+		INSERT INTO subscription (id, endpoint, key_auth, key_p256dh, user_id, subscriber_ip, updated_at, warned_at)
+		VALUES (?, ?, ?, ?, ?, ?, ?, ?)
+		ON CONFLICT (endpoint) 
+		DO UPDATE SET key_auth = excluded.key_auth, key_p256dh = excluded.key_p256dh, user_id = excluded.user_id, subscriber_ip = excluded.subscriber_ip, updated_at = excluded.updated_at, warned_at = excluded.warned_at
+	`,
+	updateSubscriptionWarningSent:       `UPDATE subscription SET warned_at = ? WHERE id = ?`,
+	deleteSubscriptionByEndpoint:        `DELETE FROM subscription WHERE endpoint = ?`,
+	deleteSubscriptionByUserID:          `DELETE FROM subscription WHERE user_id = ?`,
+	deleteSubscriptionByAge:             `DELETE FROM subscription WHERE updated_at <= ?`,
+	insertSubscriptionTopic:             `INSERT INTO subscription_topic (subscription_id, topic) VALUES (?, ?)`,
+	deleteSubscriptionTopicAll:          `DELETE FROM subscription_topic WHERE subscription_id = ?`,
+	deleteSubscriptionTopicWithoutSub:   `DELETE FROM subscription_topic WHERE subscription_id NOT IN (SELECT id FROM subscription)`,
+}
+
+func newSqliteWebPushStore(filename, startupQueries string) (*webPushStore, error) {
+	db, err := sql.Open("sqlite3", filename)
+	if err != nil {
+		return nil, err
+	}
+	if err := setupSqliteWebPushDB(db); err != nil {
+		return nil, err
+	}
+	if err := runSqliteWebPushStartupQueries(db, startupQueries); err != nil {
+		return nil, err
+	}
+	return &webPushStore{
+		db:      db,
+		queries: sqliteWebPushQueries,
+	}, nil
+}
+
+func setupSqliteWebPushDB(db *sql.DB) error {
+	// If 'schemaVersion' table does not exist, this must be a new database
+	rows, err := db.Query(sqliteSelectWebPushSchemaVersionQuery)
+	if err != nil {
+		return setupNewSqliteWebPushDB(db)
+	}
+	return rows.Close()
+}
+
+func setupNewSqliteWebPushDB(db *sql.DB) error {
+	if _, err := db.Exec(sqliteCreateWebPushSubscriptionsTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(sqliteInsertWebPushSchemaVersion, sqliteCurrentWebPushSchemaVersion); err != nil {
+		return err
+	}
+	return nil
+}
+
+func runSqliteWebPushStartupQueries(db *sql.DB, startupQueries string) error {
+	if startupQueries != "" {
+		if _, err := db.Exec(startupQueries); err != nil {
+			return err
+		}
+	}
+	if _, err := db.Exec(sqliteWebPushBuiltinStartupQueries); err != nil {
+		return err
+	}
+	return nil
+}
+