feat(db): add postgresql support

internal/bootstrap/db_bootstrap.go

@@ -6,15 +6,18 @@ import (
 	"os"
 	"path/filepath"
 
+	"github.com/golang-migrate/migrate/v4"
+	pgxmigrate "github.com/golang-migrate/migrate/v4/database/pgx/v5"
+	"github.com/golang-migrate/migrate/v4/database/sqlite3"
+	"github.com/golang-migrate/migrate/v4/source/iofs"
+	_ "github.com/jackc/pgx/v5/stdlib"
+	_ "modernc.org/sqlite"
+
 	"github.com/tinyauthapp/tinyauth/internal/assets"
 	"github.com/tinyauthapp/tinyauth/internal/repository"
 	"github.com/tinyauthapp/tinyauth/internal/repository/memory"
+	"github.com/tinyauthapp/tinyauth/internal/repository/postgres"
 	"github.com/tinyauthapp/tinyauth/internal/repository/sqlite"
-
-	"github.com/golang-migrate/migrate/v4"
-	"github.com/golang-migrate/migrate/v4/database/sqlite3"
-	"github.com/golang-migrate/migrate/v4/source/iofs"
-	_ "modernc.org/sqlite"
 )
 
 func (app *BootstrapApp) SetupStore() (repository.Store, error) {
@@ -23,8 +26,10 @@ func (app *BootstrapApp) SetupStore() (repository.Store, error) {
 		return memory.New(), nil
 	case "sqlite", "":
 		return app.setupSQLite(app.config.Database.Path)
+	case "postgres":
+		return app.setupPostgres(app.config.Database.Path)
 	default:
-		return nil, fmt.Errorf("unknown database driver %q: valid values are sqlite, memory", app.config.Database.Driver)
+		return nil, fmt.Errorf("unknown database driver %q: valid values are sqlite, postgres, memory", app.config.Database.Driver)
 	}
 }
 
@@ -78,3 +83,44 @@ func (app *BootstrapApp) setupSQLite(databasePath string) (repository.Store, err
 
 	return sqlite.NewStore(sqlite.New(db)), nil
 }
+
+func (app *BootstrapApp) setupPostgres(databaseURL string) (repository.Store, error) {
+	db, err := sql.Open("pgx", databaseURL)
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to open database: %w", err)
+	}
+
+	// Close the database if there is an error during migration
+	defer func() {
+		if err != nil {
+			db.Close()
+		}
+	}()
+
+	migrations, err := iofs.New(assets.Migrations, "migrations/postgres")
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to create migrations: %w", err)
+	}
+
+	target, err := pgxmigrate.WithInstance(db, &pgxmigrate.Config{})
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to create postgres instance: %w", err)
+	}
+
+	migrator, err := migrate.NewWithInstance("iofs", migrations, "pgx", target)
+
+	if err != nil {
+		return nil, fmt.Errorf("failed to create migrator: %w", err)
+	}
+
+	if err := migrator.Up(); err != nil && err != migrate.ErrNoChange {
+		return nil, fmt.Errorf("failed to migrate database: %w", err)
+	}
+
+	app.db = db
+
+	return postgres.NewStore(postgres.New(db)), nil
+}