Implement more meta-spaces (#7077)

src/stores/spaces/SpaceTreeLevelLayoutStore.ts

@@ -0,0 +1,48 @@
+/*
+Copyright 2021 Šimon Brandner <simon.bra.ag@gmail.com>
+
+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.
+*/
+
+const getSpaceCollapsedKey = (roomId: string, parents: Set<string>): string => {
+    const separator = "/";
+    let path = "";
+    if (parents) {
+        for (const entry of parents.entries()) {
+            path += entry + separator;
+        }
+    }
+    return `mx_space_collapsed_${path + roomId}`;
+};
+
+export default class SpaceTreeLevelLayoutStore {
+    private static internalInstance: SpaceTreeLevelLayoutStore;
+
+    public static get instance(): SpaceTreeLevelLayoutStore {
+        if (!SpaceTreeLevelLayoutStore.internalInstance) {
+            SpaceTreeLevelLayoutStore.internalInstance = new SpaceTreeLevelLayoutStore();
+        }
+        return SpaceTreeLevelLayoutStore.internalInstance;
+    }
+
+    public setSpaceCollapsedState(roomId: string, parents: Set<string>, collapsed: boolean) {
+        // XXX: localStorage doesn't allow booleans
+        localStorage.setItem(getSpaceCollapsedKey(roomId, parents), collapsed.toString());
+    }
+
+    public getSpaceCollapsedState(roomId: string, parents: Set<string>, fallback: boolean): boolean {
+        const collapsedLocalStorage = localStorage.getItem(getSpaceCollapsedKey(roomId, parents));
+        // XXX: localStorage doesn't allow booleans
+        return collapsedLocalStorage ? collapsedLocalStorage === "true" : fallback;
+    }
+}