Refactor media storage layer, add tests (#2352)

* Refactor mediaapi storage layer

* Verify filetype before trying to create thumbnails

* Add media api storage tests

* Fix returned values

mediaapi/storage/tables/interface.go

@@ -0,0 +1,46 @@
+// Copyright 2022 The Matrix.org Foundation C.I.C.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package tables
+
+import (
+	"context"
+	"database/sql"
+
+	"github.com/matrix-org/dendrite/mediaapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+type Thumbnails interface {
+	InsertThumbnail(ctx context.Context, txn *sql.Tx, thumbnailMetadata *types.ThumbnailMetadata) error
+	SelectThumbnail(
+		ctx context.Context, txn *sql.Tx,
+		mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
+		width, height int,
+		resizeMethod string,
+	) (*types.ThumbnailMetadata, error)
+	SelectThumbnails(
+		ctx context.Context, txn *sql.Tx, mediaID types.MediaID,
+		mediaOrigin gomatrixserverlib.ServerName,
+	) ([]*types.ThumbnailMetadata, error)
+}
+
+type MediaRepository interface {
+	InsertMedia(ctx context.Context, txn *sql.Tx, mediaMetadata *types.MediaMetadata) error
+	SelectMedia(ctx context.Context, txn *sql.Tx, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName) (*types.MediaMetadata, error)
+	SelectMediaByHash(
+		ctx context.Context, txn *sql.Tx,
+		mediaHash types.Base64Hash, mediaOrigin gomatrixserverlib.ServerName,
+	) (*types.MediaMetadata, error)
+}