Initial support for notification settings

Signed-off-by: Travis Ralston <travpc@gmail.com>

src/settings/handlers/RoomSettingsHandler.js

@@ -0,0 +1,70 @@
+/*
+Copyright 2017 Travis Ralston
+
+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 SettingsHandler from "./SettingsHandler";
+import MatrixClientPeg from '../../MatrixClientPeg';
+
+/**
+ * Gets and sets settings at the "room" level.
+ */
+export default class RoomSettingsHandler extends SettingsHandler {
+    getValue(settingName, roomId) {
+        // Special case URL previews
+        if (settingName === "urlPreviewsEnabled") {
+            const content = this._getSettings(roomId, "org.matrix.room.preview_urls");
+            return !content['disable'];
+        }
+
+        return this._getSettings(roomId)[settingName];
+    }
+
+    setValue(settingName, roomId, newValue) {
+        // Special case URL previews
+        if (settingName === "urlPreviewsEnabled") {
+            const content = this._getSettings(roomId, "org.matrix.room.preview_urls");
+            content['disable'] = !newValue;
+            return MatrixClientPeg.get().sendStateEvent(roomId, "org.matrix.room.preview_urls", content);
+        }
+
+        const content = this._getSettings(roomId);
+        content[settingName] = newValue;
+        return MatrixClientPeg.get().sendStateEvent(roomId, "im.vector.web.settings", content, "");
+    }
+
+    canSetValue(settingName, roomId) {
+        const cli = MatrixClientPeg.get();
+        const room = cli.getRoom(roomId);
+
+        let eventType = "im.vector.web.settings";
+        if (settingName === "urlPreviewsEnabled") eventType = "org.matrix.room.preview_urls";
+
+        if (!room) return false;
+        return room.currentState.maySendStateEvent(eventType, cli.getUserId());
+    }
+
+    isSupported() {
+        const cli = MatrixClientPeg.get();
+        return cli !== undefined && cli !== null;
+    }
+
+    _getSettings(roomId, eventType = "im.vector.web.settings") {
+        const room = MatrixClientPeg.get().getRoom(roomId);
+        if (!room) return {};
+        const event = room.currentState.getStateEvents(eventType, "");
+        if (!event || !event.getContent()) return {};
+        return event.getContent();
+    }
+}