store for custom tags to share state between tag panel & room list

src/stores/CustomRoomTagStore.js

@@ -0,0 +1,104 @@
+/*
+Copyright 2017 New Vector 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 {Store} from 'flux/utils';
+import dis from '../dispatcher';
+import RoomListStore from './RoomListStore';
+const STANDARD_TAGS_REGEX = /^(m\.(favourite|lowpriority|server_notice)|im\.vector\.fake\.(invite|recent|direct|archived))$/;
+
+/**
+ * A class for storing application state for ordering tags in the TagPanel.
+ */
+class CustomRoomTagStore extends Store {
+    constructor() {
+        super(dis);
+
+        // Initialise state
+        this._state = Object.assign({}, {tags: this._getUpdatedTags()});
+
+        this._roomListStoreToken = RoomListStore.addListener(() => {
+            // UGLY: FluxStore doens't emit changes that
+            // didn't come from a dispatcher action
+            // so emit the change ourselves for now ...
+            this._state.tags = this._getUpdatedTags();
+            this.__emitter.emit("change");
+        });
+    }
+
+    getTags() {
+        return this._state.tags;
+    }
+
+    getSortedTags() {this._state.tags
+        return Object.keys(this._state.tags).sort().map((name) => {
+            return {name, selected: this._state.tags[name]};
+        });
+    }
+
+    _setState(newState) {
+        this._state = Object.assign(this._state, newState);
+        this.__emitChange();
+    }
+
+    __onDispatch(payload) {
+        switch (payload.action) {
+            case 'select_custom_room_tag': {
+                const oldTags = this._state.tags;
+                if (oldTags.hasOwnProperty(payload.tag)) {
+                    const tag = {};
+                    tag[payload.tag] = !oldTags[payload.tag];
+                    const tags = Object.assign({}, oldTags, tag);
+                    this._setState({tags});
+                }
+            }
+            break;
+            case 'deselect_custom_room_tags': {
+                const tags = Object.keys(this._state.tags)
+                    .reduce((tags, tagName) => {
+                        tags[tagName] = false;
+                        return tags;
+                    }, {});
+                this._setState({tags});
+            }
+            break;
+            case 'on_logged_out': {
+                this._state = {};
+                if (this._roomListStoreToken) {
+                    this._roomListStoreToken.remove();
+                    this._roomListStoreToken = null;
+                }
+            }
+            break;
+        }
+    }
+
+    _getUpdatedTags() {
+        const newTagNames = Object.keys(RoomListStore.getRoomLists())
+            .filter((tagName) => {
+                return !tagName.match(STANDARD_TAGS_REGEX);
+            }).sort();
+        const prevTags = this._state && this._state.tags;
+        const newTags = newTagNames.reduce((newTags, tagName) => {
+            newTags[tagName] = (prevTags && prevTags[tagName]) || false;
+            return newTags;
+        }, {});
+        return newTags;
+    }
+}
+
+if (global.singletonCustomRoomTagStore === undefined) {
+    global.singletonCustomRoomTagStore = new CustomRoomTagStore();
+}
+export default global.singletonCustomRoomTagStore;