Introduce KeyValueStore

Riot/Managers/KeyValueStorage/MemoryStore.swift

@@ -0,0 +1,40 @@
+// 
+// Copyright 2020 Vector Creations Ltd
+//
+// 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.
+//
+
+import Foundation
+
+@objcMembers
+class MemoryStore: KeyValueStore {
+    
+    private var map: Dictionary<KeyValueStoreKey, Any> = [:]
+    
+    func setObject(forKey key: KeyValueStoreKey, value: Any?) {
+        if let value = value {
+            map[key] = value
+        } else {
+            removeObject(forKey: key)
+        }
+    }
+
+    func getObject(forKey key: KeyValueStoreKey) -> Any? {
+        return map[key]
+    }
+    
+    func removeObject(forKey key: KeyValueStoreKey) {
+        map.removeValue(forKey: key)
+    }
+    
+}