Postgres

2026-10-15 16:07:55 +00:00 · 2025-12-27 21:55:30 -05:00
parent b27c4cf95d
commit e595d3ae15
18 changed files with 1974 additions and 1294 deletions
@@ -0,0 +1,130 @@
+package server
+
+import (
+	"database/sql"
+	"fmt"
+
+	_ "github.com/lib/pq" // PostgreSQL driver
+)
+
+// PostgreSQL-specific queries
+const (
+	pgCreateWebPushSubscriptionsTableQuery = `
+		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 schema_version (
+			id INT PRIMARY KEY,
+			version INT NOT NULL
+		);			
+		COMMIT;
+	`
+
+	// Schema management queries
+	pgCurrentWebPushSchemaVersion     = 1
+	pgInsertWebPushSchemaVersion      = `INSERT INTO schema_version VALUES (1, $1)`
+	pgSelectWebPushSchemaVersionQuery = `SELECT version FROM schema_version WHERE id = 1`
+)
+
+// PostgreSQL-specific webpush queries
+var pgWebPushQueries = &webPushQueries{
+	selectSubscriptionIDByEndpoint:        `SELECT id FROM subscription WHERE endpoint = $1`,
+	selectSubscriptionCountBySubscriberIP: `SELECT COUNT(*) FROM subscription WHERE subscriber_ip = $1`,
+	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 = $1
+		ORDER BY endpoint
+	`,
+	selectSubscriptionsExpiringSoon: `
+		SELECT id, endpoint, key_auth, key_p256dh, user_id 
+		FROM subscription 
+		WHERE warned_at = 0 AND updated_at <= $1
+	`,
+	insertSubscription: `
+		INSERT INTO subscription (id, endpoint, key_auth, key_p256dh, user_id, subscriber_ip, updated_at, warned_at)
+		VALUES ($1, $2, $3, $4, $5, $6, $7, $8)
+		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 = $1 WHERE id = $2`,
+	deleteSubscriptionByEndpoint:      `DELETE FROM subscription WHERE endpoint = $1`,
+	deleteSubscriptionByUserID:        `DELETE FROM subscription WHERE user_id = $1`,
+	deleteSubscriptionByAge:           `DELETE FROM subscription WHERE updated_at <= $1`,
+	insertSubscriptionTopic:           `INSERT INTO subscription_topic (subscription_id, topic) VALUES ($1, $2)`,
+	deleteSubscriptionTopicAll:        `DELETE FROM subscription_topic WHERE subscription_id = $1`,
+	deleteSubscriptionTopicWithoutSub: `DELETE FROM subscription_topic WHERE subscription_id NOT IN (SELECT id FROM subscription)`,
+}
+
+func newPgWebPushStore(connStr, startupQueries string) (*webPushStore, error) {
+	db, err := sql.Open("postgres", connStr)
+	if err != nil {
+		return nil, err
+	}
+	if err := db.Ping(); err != nil {
+		return nil, fmt.Errorf("failed to connect to PostgreSQL: %w", err)
+	}
+	if err := setupPgWebPushDB(db); err != nil {
+		return nil, err
+	}
+	if err := runPgWebPushStartupQueries(db, startupQueries); err != nil {
+		return nil, err
+	}
+	return &webPushStore{
+		db:      db,
+		queries: pgWebPushQueries,
+	}, nil
+}
+
+func setupPgWebPushDB(db *sql.DB) error {
+	// If 'schema_version' table does not exist, this must be a new database
+	rows, err := db.Query(pgSelectWebPushSchemaVersionQuery)
+	if err != nil {
+		return setupNewPgWebPushDB(db)
+	}
+	defer rows.Close()
+
+	// If table exists but no rows, also create new
+	if !rows.Next() {
+		return setupNewPgWebPushDB(db)
+	}
+	return nil
+}
+
+func setupNewPgWebPushDB(db *sql.DB) error {
+	if _, err := db.Exec(pgCreateWebPushSubscriptionsTableQuery); err != nil {
+		return err
+	}
+	if _, err := db.Exec(pgInsertWebPushSchemaVersion, pgCurrentWebPushSchemaVersion); err != nil {
+		return err
+	}
+	return nil
+}
+
+func runPgWebPushStartupQueries(db *sql.DB, startupQueries string) error {
+	if startupQueries != "" {
+		if _, err := db.Exec(startupQueries); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+