Split the data-model in different modules

crates/data-model/src/traits.rs

@@ -0,0 +1,37 @@
+// Copyright 2021 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.
+
+pub trait StorageBackendMarker: StorageBackend {}
+
+pub trait StorageBackend {
+    type UserData: Clone + std::fmt::Debug + PartialEq;
+    type AuthenticationData: Clone + std::fmt::Debug + PartialEq;
+    type BrowserSessionData: Clone + std::fmt::Debug + PartialEq;
+    type ClientData: Clone + std::fmt::Debug + PartialEq;
+    type SessionData: Clone + std::fmt::Debug + PartialEq;
+    type AuthorizationGrantData: Clone + std::fmt::Debug + PartialEq;
+    type AccessTokenData: Clone + std::fmt::Debug + PartialEq;
+    type RefreshTokenData: Clone + std::fmt::Debug + PartialEq;
+}
+
+impl StorageBackend for () {
+    type AccessTokenData = ();
+    type AuthenticationData = ();
+    type AuthorizationGrantData = ();
+    type BrowserSessionData = ();
+    type ClientData = ();
+    type RefreshTokenData = ();
+    type SessionData = ();
+    type UserData = ();
+}