Implement storage interfaces (#841)

* Implement interfaces for federationsender storage

* Implement interfaces for mediaapi storage

* Implement interfaces for publicroomsapi storage

* Implement interfaces for roomserver storage

* Implement interfaces for syncapi storage

* Implement interfaces for keydb storage

* common.PartitionStorer in publicroomsapi interface

* Update copyright notices

6 files changed, 136 insertions, 84 deletions

diff --git a/mediaapi/storage/media_repository_table.go b/mediaapi/storage/postgres/media_repository_table.go
index addd47b4..e975530a 100644
--- a/mediaapi/storage/media_repository_table.go
+++ b/mediaapi/storage/postgres/media_repository_table.go
@@ -1,4 +1,5 @@
-// Copyright 2017 Vector Creations Ltd
+// Copyright 2017-2018 New Vector Ltd
+// Copyright 2019-2020 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.
@@ -12,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package storage
+package postgres
 
 import (
 	"context"
diff --git a/mediaapi/storage/prepare.go b/mediaapi/storage/postgres/prepare.go
index a30586de..090c3d17 100644
--- a/mediaapi/storage/prepare.go
+++ b/mediaapi/storage/postgres/prepare.go
@@ -1,4 +1,5 @@
-// Copyright 2017 Vector Creations Ltd
+// Copyright 2017-2018 New Vector Ltd
+// Copyright 2019-2020 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.
@@ -14,7 +15,7 @@
 
 // FIXME: This should be made common!
 
-package storage
+package postgres
 
 import (
 	"database/sql"
diff --git a/mediaapi/storage/sql.go b/mediaapi/storage/postgres/sql.go
index 1f8c7be3..181cd15f 100644
--- a/mediaapi/storage/sql.go
+++ b/mediaapi/storage/postgres/sql.go
@@ -1,4 +1,5 @@
-// Copyright 2017 Vector Creations Ltd
+// Copyright 2017-2018 New Vector Ltd
+// Copyright 2019-2020 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.
@@ -12,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package storage
+package postgres
 
 import (
 	"database/sql"
diff --git a/mediaapi/storage/postgres/storage.go b/mediaapi/storage/postgres/storage.go
new file mode 100644
index 00000000..6259f4a1
--- /dev/null
+++ b/mediaapi/storage/postgres/storage.go
@@ -0,0 +1,106 @@
+// Copyright 2017-2018 New Vector Ltd
+// Copyright 2019-2020 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 postgres
+
+import (
+	"context"
+	"database/sql"
+
+	// Import the postgres database driver.
+	_ "github.com/lib/pq"
+	"github.com/matrix-org/dendrite/mediaapi/types"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+// Database is used to store metadata about a repository of media files.
+type Database struct {
+	statements statements
+	db         *sql.DB
+}
+
+// Open opens a postgres database.
+func Open(dataSourceName string) (*Database, error) {
+	var d Database
+	var err error
+	if d.db, err = sql.Open("postgres", dataSourceName); err != nil {
+		return nil, err
+	}
+	if err = d.statements.prepare(d.db); err != nil {
+		return nil, err
+	}
+	return &d, nil
+}
+
+// StoreMediaMetadata inserts the metadata about the uploaded media into the database.
+// Returns an error if the combination of MediaID and Origin are not unique in the table.
+func (d *Database) StoreMediaMetadata(
+	ctx context.Context, mediaMetadata *types.MediaMetadata,
+) error {
+	return d.statements.media.insertMedia(ctx, mediaMetadata)
+}
+
+// GetMediaMetadata returns metadata about media stored on this server.
+// The media could have been uploaded to this server or fetched from another server and cached here.
+// Returns nil metadata if there is no metadata associated with this media.
+func (d *Database) GetMediaMetadata(
+	ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
+) (*types.MediaMetadata, error) {
+	mediaMetadata, err := d.statements.media.selectMedia(ctx, mediaID, mediaOrigin)
+	if err != nil && err == sql.ErrNoRows {
+		return nil, nil
+	}
+	return mediaMetadata, err
+}
+
+// StoreThumbnail inserts the metadata about the thumbnail into the database.
+// Returns an error if the combination of MediaID and Origin are not unique in the table.
+func (d *Database) StoreThumbnail(
+	ctx context.Context, thumbnailMetadata *types.ThumbnailMetadata,
+) error {
+	return d.statements.thumbnail.insertThumbnail(ctx, thumbnailMetadata)
+}
+
+// GetThumbnail returns metadata about a specific thumbnail.
+// The media could have been uploaded to this server or fetched from another server and cached here.
+// Returns nil metadata if there is no metadata associated with this thumbnail.
+func (d *Database) GetThumbnail(
+	ctx context.Context,
+	mediaID types.MediaID,
+	mediaOrigin gomatrixserverlib.ServerName,
+	width, height int,
+	resizeMethod string,
+) (*types.ThumbnailMetadata, error) {
+	thumbnailMetadata, err := d.statements.thumbnail.selectThumbnail(
+		ctx, mediaID, mediaOrigin, width, height, resizeMethod,
+	)
+	if err != nil && err == sql.ErrNoRows {
+		return nil, nil
+	}
+	return thumbnailMetadata, err
+}
+
+// GetThumbnails returns metadata about all thumbnails for a specific media stored on this server.
+// The media could have been uploaded to this server or fetched from another server and cached here.
+// Returns nil metadata if there are no thumbnails associated with this media.
+func (d *Database) GetThumbnails(
+	ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
+) ([]*types.ThumbnailMetadata, error) {
+	thumbnails, err := d.statements.thumbnail.selectThumbnails(ctx, mediaID, mediaOrigin)
+	if err != nil && err == sql.ErrNoRows {
+		return nil, nil
+	}
+	return thumbnails, err
+}
diff --git a/mediaapi/storage/thumbnail_table.go b/mediaapi/storage/postgres/thumbnail_table.go
index f100485f..167e3795 100644
--- a/mediaapi/storage/thumbnail_table.go
+++ b/mediaapi/storage/postgres/thumbnail_table.go
@@ -1,4 +1,5 @@
-// Copyright 2017 Vector Creations Ltd
+// Copyright 2017-2018 New Vector Ltd
+// Copyright 2019-2020 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.
@@ -12,7 +13,7 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-package storage
+package postgres
 
 import (
 	"context"
diff --git a/mediaapi/storage/storage.go b/mediaapi/storage/storage.go
index bef134a9..0f39c1d0 100644
--- a/mediaapi/storage/storage.go
+++ b/mediaapi/storage/storage.go
@@ -1,4 +1,4 @@
-// Copyright 2017 Vector Creations Ltd
+// Copyright 2020 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.
@@ -16,90 +16,32 @@ package storage
 
 import (
 	"context"
-	"database/sql"
+	"errors"
+	"net/url"
 
-	// Import the postgres database driver.
-	_ "github.com/lib/pq"
+	"github.com/matrix-org/dendrite/mediaapi/storage/postgres"
 	"github.com/matrix-org/dendrite/mediaapi/types"
 	"github.com/matrix-org/gomatrixserverlib"
 )
 
-// Database is used to store metadata about a repository of media files.
-type Database struct {
-	statements statements
-	db         *sql.DB
+type Database interface {
+	StoreMediaMetadata(ctx context.Context, mediaMetadata *types.MediaMetadata) error
+	GetMediaMetadata(ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName) (*types.MediaMetadata, error)
+	StoreThumbnail(ctx context.Context, thumbnailMetadata *types.ThumbnailMetadata) error
+	GetThumbnail(ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName, width, height int, resizeMethod string) (*types.ThumbnailMetadata, error)
+	GetThumbnails(ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName) ([]*types.ThumbnailMetadata, error)
 }
 
 // Open opens a postgres database.
-func Open(dataSourceName string) (*Database, error) {
-	var d Database
-	var err error
-	if d.db, err = sql.Open("postgres", dataSourceName); err != nil {
+func Open(dataSourceName string) (Database, error) {
+	uri, err := url.Parse(dataSourceName)
+	if err != nil {
 		return nil, err
 	}
-	if err = d.statements.prepare(d.db); err != nil {
-		return nil, err
-	}
-	return &d, nil
-}
-
-// StoreMediaMetadata inserts the metadata about the uploaded media into the database.
-// Returns an error if the combination of MediaID and Origin are not unique in the table.
-func (d *Database) StoreMediaMetadata(
-	ctx context.Context, mediaMetadata *types.MediaMetadata,
-) error {
-	return d.statements.media.insertMedia(ctx, mediaMetadata)
-}
-
-// GetMediaMetadata returns metadata about media stored on this server.
-// The media could have been uploaded to this server or fetched from another server and cached here.
-// Returns nil metadata if there is no metadata associated with this media.
-func (d *Database) GetMediaMetadata(
-	ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
-) (*types.MediaMetadata, error) {
-	mediaMetadata, err := d.statements.media.selectMedia(ctx, mediaID, mediaOrigin)
-	if err != nil && err == sql.ErrNoRows {
-		return nil, nil
-	}
-	return mediaMetadata, err
-}
-
-// StoreThumbnail inserts the metadata about the thumbnail into the database.
-// Returns an error if the combination of MediaID and Origin are not unique in the table.
-func (d *Database) StoreThumbnail(
-	ctx context.Context, thumbnailMetadata *types.ThumbnailMetadata,
-) error {
-	return d.statements.thumbnail.insertThumbnail(ctx, thumbnailMetadata)
-}
-
-// GetThumbnail returns metadata about a specific thumbnail.
-// The media could have been uploaded to this server or fetched from another server and cached here.
-// Returns nil metadata if there is no metadata associated with this thumbnail.
-func (d *Database) GetThumbnail(
-	ctx context.Context,
-	mediaID types.MediaID,
-	mediaOrigin gomatrixserverlib.ServerName,
-	width, height int,
-	resizeMethod string,
-) (*types.ThumbnailMetadata, error) {
-	thumbnailMetadata, err := d.statements.thumbnail.selectThumbnail(
-		ctx, mediaID, mediaOrigin, width, height, resizeMethod,
-	)
-	if err != nil && err == sql.ErrNoRows {
-		return nil, nil
-	}
-	return thumbnailMetadata, err
-}
-
-// GetThumbnails returns metadata about all thumbnails for a specific media stored on this server.
-// The media could have been uploaded to this server or fetched from another server and cached here.
-// Returns nil metadata if there are no thumbnails associated with this media.
-func (d *Database) GetThumbnails(
-	ctx context.Context, mediaID types.MediaID, mediaOrigin gomatrixserverlib.ServerName,
-) ([]*types.ThumbnailMetadata, error) {
-	thumbnails, err := d.statements.thumbnail.selectThumbnails(ctx, mediaID, mediaOrigin)
-	if err != nil && err == sql.ErrNoRows {
-		return nil, nil
+	switch uri.Scheme {
+	case "postgres":
+		return postgres.Open(dataSourceName)
+	default:
+		return nil, errors.New("unknown schema")
 	}
-	return thumbnails, err
 }