tidying up here and there

internal/db/db.go

@@ -0,0 +1,57 @@
+/*
+   GoToSocial
+   Copyright (C) 2021 GoToSocial Authors admin@gotosocial.org
+
+   This program is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Affero General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Affero General Public License for more details.
+
+   You should have received a copy of the GNU Affero General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package db
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	"github.com/go-fed/activity/pub"
+	"github.com/gotosocial/gotosocial/internal/config"
+	"github.com/sirupsen/logrus"
+)
+
+const dbTypePostgres string = "POSTGRES"
+
+// DB provides methods for interacting with an underlying database (for now, just postgres).
+// The function mapping lines up with the DB interface described in go-fed.
+// See here: https://github.com/go-fed/activity/blob/master/pub/database.go
+type DB interface {
+	/*
+		GO-FED DATABASE FUNCTIONS
+	*/
+	pub.Database
+
+	/*
+		ANY ADDITIONAL DESIRED FUNCTIONS
+	*/
+	Stop(context.Context) error
+}
+
+// New returns a new database service that satisfies the Service interface and, by extension,
+// the go-fed database interface described here: https://github.com/go-fed/activity/blob/master/pub/database.go
+func New(ctx context.Context, c *config.Config, log *logrus.Logger) (DB, error) {
+	switch strings.ToUpper(c.DBConfig.Type) {
+	case dbTypePostgres:
+		return newPostgresService(ctx, c, log.WithField("service", "db"))
+	default:
+		return nil, fmt.Errorf("database type %s not supported", c.DBConfig.Type)
+	}
+}