Merge both user API databases into one (#2186)

* Merge user API databases into one

* Remove DeviceDatabase from config

* Fix tests

* Try that again

* Clean up keyserver device keys when the devices no longer exist in the user API

* Tweak ordering

* Fix UserExists flag, device check

* Allow including empty entries so we can clean them up

* Remove logging

userapi/storage/storage_wasm.go

@@ -0,0 +1,41 @@
+// 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.
+// 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 storage
+
+import (
+	"fmt"
+	"time"
+
+	"github.com/matrix-org/dendrite/setup/config"
+	"github.com/matrix-org/dendrite/userapi/storage/sqlite3"
+	"github.com/matrix-org/gomatrixserverlib"
+)
+
+func NewDatabase(
+	dbProperties *config.DatabaseOptions,
+	serverName gomatrixserverlib.ServerName,
+	bcryptCost int,
+	openIDTokenLifetimeMS int64,
+	loginTokenLifetime time.Duration,
+) (Database, error) {
+	switch {
+	case dbProperties.ConnectionString.IsSQLite():
+		return sqlite3.NewDatabase(dbProperties, serverName, bcryptCost, openIDTokenLifetimeMS, loginTokenLifetime)
+	case dbProperties.ConnectionString.IsPostgres():
+		return nil, fmt.Errorf("can't use Postgres implementation")
+	default:
+		return nil, fmt.Errorf("unexpected database type")
+	}
+}