ai: generate postgres package draft

src/storage/postgres/storage.go

@@ -0,0 +1,34 @@
+package postgres
+
+import (
+	"database/sql"
+	"log"
+
+	_ "github.com/lib/pq"
+)
+
+type PostgresStorage struct {
+	db *sql.DB
+}
+
+func New(connStr string) (*PostgresStorage, error) {
+	db, err := sql.Open("postgres", connStr)
+	if err != nil {
+		return nil, err
+	}
+
+	if err := db.Ping(); err != nil {
+		return nil, err
+	}
+
+	if err := migrate(db); err != nil {
+		return nil, err
+	}
+
+	log.Print("connected to postgres")
+	return &PostgresStorage{db: db}, nil
+}
+
+func (s *PostgresStorage) Close() error {
+	return s.db.Close()
+}