Merge pull request #1152 from matrix-org/rxl881/apps

Add support for apps

src/ScalarMessaging.js

@@ -1,5 +1,6 @@
 /*
 Copyright 2016 OpenMarket Ltd
+Copyright 2017 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.
@@ -109,6 +110,76 @@ Example:
     response: 78
 }
 
+set_widget
+----------
+Set a new widget in the room. Clobbers based on the ID.
+
+Request:
+ - `room_id` (String) is the room to set the widget in.
+ - `widget_id` (String) is the ID of the widget to add (or replace if it already exists).
+   It can be an arbitrary UTF8 string and is purely for distinguishing between widgets.
+ - `url` (String) is the URL that clients should load in an iframe to run the widget.
+   All widgets must have a valid URL. If the URL is `null` (not `undefined`), the
+   widget will be removed from the room.
+ - `type` (String) is the type of widget, which is provided as a hint for matrix clients so they
+   can configure/lay out the widget in different ways. All widgets must have a type.
+ - `name` (String) is an optional human-readable string about the widget.
+ - `data` (Object) is some optional data about the widget, and can contain arbitrary key/value pairs.
+Response:
+{
+    success: true
+}
+Example:
+{
+    action: "set_widget",
+    room_id: "!foo:bar",
+    widget_id: "abc123",
+    url: "http://widget.url",
+    type: "example",
+    response: {
+        success: true
+    }
+}
+
+get_widgets
+-----------
+Get a list of all widgets in the room. The response is the `content` field
+of the state event.
+
+Request:
+ - `room_id` (String) is the room to get the widgets in.
+Response:
+{
+    $widget_id: {
+        type: "example",
+        url: "http://widget.url",
+        name: "Example Widget",
+        data: {
+            key: "val"
+        }
+    },
+    $widget_id: { ... }
+}
+Example:
+{
+    action: "get_widgets",
+    room_id: "!foo:bar",
+    widget_id: "abc123",
+    url: "http://widget.url",
+    type: "example",
+    response: {
+        $widget_id: {
+            type: "example",
+            url: "http://widget.url",
+            name: "Example Widget",
+            data: {
+                key: "val"
+            }
+        },
+        $widget_id: { ... }
+    }
+}
+
 
 membership_state AND bot_options
 --------------------------------
@@ -191,6 +262,84 @@ function inviteUser(event, roomId, userId) {
     });
 }
 
+function setWidget(event, roomId) {
+    const widgetId = event.data.widget_id;
+    const widgetType = event.data.type;
+    const widgetUrl = event.data.url;
+    const widgetName = event.data.name; // optional
+    const widgetData = event.data.data; // optional
+
+    const client = MatrixClientPeg.get();
+    if (!client) {
+        sendError(event, _t('You need to be logged in.'));
+        return;
+    }
+
+    // both adding/removing widgets need these checks
+    if (!widgetId || widgetUrl === undefined) {
+        sendError(event, _t("Unable to create widget."), new Error("Missing required widget fields."));
+        return;
+    }
+
+    if (widgetUrl !== null) { // if url is null it is being deleted, don't need to check name/type/etc
+        // check types of fields
+        if (widgetName !== undefined && typeof widgetName !== 'string') {
+            sendError(event, _t("Unable to create widget."), new Error("Optional field 'name' must be a string."));
+            return;
+        }
+        if (widgetData !== undefined && !(widgetData instanceof Object)) {
+            sendError(event, _t("Unable to create widget."), new Error("Optional field 'data' must be an Object."));
+            return;
+        }
+        if (typeof widgetType !== 'string') {
+            sendError(event, _t("Unable to create widget."), new Error("Field 'type' must be a string."));
+            return;
+        }
+        if (typeof widgetUrl !== 'string') {
+            sendError(event, _t("Unable to create widget."), new Error("Field 'url' must be a string or null."));
+            return;
+        }
+    }
+
+    // TODO: same dance we do for power levels. It'd be nice if the JS SDK had helper methods to do this.
+    client.getStateEvent(roomId, "im.vector.modular.widgets", "").then((widgets) => {
+        if (widgetUrl === null) {
+            delete widgets[widgetId];
+        }
+        else {
+            widgets[widgetId] = {
+                type: widgetType,
+                url: widgetUrl,
+                name: widgetName,
+                data: widgetData,
+            };
+        }
+        return client.sendStateEvent(roomId, "im.vector.modular.widgets", widgets);
+    }, (err) => {
+        if (err.errcode === "M_NOT_FOUND") {
+            return client.sendStateEvent(roomId, "im.vector.modular.widgets", {
+                [widgetId]: {
+                    type: widgetType,
+                    url: widgetUrl,
+                    name: widgetName,
+                    data: widgetData,
+                }
+            });
+        }
+        throw err;
+    }).done(() => {
+        sendResponse(event, {
+            success: true,
+        });
+    }, (err) => {
+        sendError(event, _t('Failed to send request.'), err);
+    });
+}
+
+function getWidgets(event, roomId) {
+    returnStateEvent(event, roomId, "im.vector.modular.widgets", "");
+}
+
 function setPlumbingState(event, roomId, status) {
     if (typeof status !== 'string') {
         throw new Error('Plumbing state status should be a string');
@@ -367,7 +516,7 @@ const onMessage = function(event) {
             return;
         }
 
-        // Getting join rules does not require userId
+        // These APIs don't require userId
         if (event.data.action === "join_rules_state") {
             getJoinRules(event, roomId);
             return;
@@ -377,6 +526,12 @@ const onMessage = function(event) {
         } else if (event.data.action === "get_membership_count") {
             getMembershipCount(event, roomId);
             return;
+        } else if (event.data.action === "set_widget") {
+            setWidget(event, roomId);
+            return;
+        } else if (event.data.action === "get_widgets") {
+            getWidgets(event, roomId);
+            return;
         }
 
         if (!userId) {

src/UserSettingsStore.js

@@ -30,11 +30,17 @@ export default {
             id: 'rich_text_editor',
             default: false,
         },
+        {
+            name: "-",
+            id: 'matrix_apps',
+            default: false,
+        },
     ],
 
     // horrible but it works. The locality makes this somewhat more palatable.
     doTranslations: function() {
         this.LABS_FEATURES[0].name = _t("New Composer & Autocomplete");
+        this.LABS_FEATURES[1].name = _t("Matrix Apps");
     },
 
     loadProfileInfo: function() {

src/components/structures/RoomView.js

@@ -47,13 +47,12 @@ import UserProvider from '../../autocomplete/UserProvider';
 
 import RoomViewStore from '../../stores/RoomViewStore';
 
-var DEBUG = false;
+let DEBUG = false;
+let debuglog = function() {};
 
 if (DEBUG) {
     // using bind means that we get to keep useful line numbers in the console
-    var debuglog = console.log.bind(console);
-} else {
-    var debuglog = function() {};
+    debuglog = console.log.bind(console);
 }
 
 module.exports = React.createClass({
@@ -113,6 +112,7 @@ module.exports = React.createClass({
             callState: null,
             guestsCanJoin: false,
             canPeek: false,
+            showApps: false,
 
             // error object, as from the matrix client/server API
             // If we failed to load information about the room,
@@ -236,6 +236,7 @@ module.exports = React.createClass({
         if (room) {
             this.setState({
                 unsentMessageError: this._getUnsentMessageError(room),
+                showApps: this._shouldShowApps(room),
             });
             this._onRoomLoaded(room);
         }
@@ -273,6 +274,11 @@ module.exports = React.createClass({
         }
     },
 
+    _shouldShowApps: function(room) {
+        const appsStateEvents = room.currentState.getStateEvents('im.vector.modular.widgets', '');
+        return appsStateEvents && Object.keys(appsStateEvents.getContent()).length > 0;
+    },
+
     componentDidMount: function() {
         var call = this._getCallForRoom();
         var callState = call ? call.call_state : "ended";
@@ -453,9 +459,14 @@ module.exports = React.createClass({
                 this._updateConfCallNotification();
 
                 this.setState({
-                    callState: callState
+                    callState: callState,
                 });
 
+                break;
+            case 'appsDrawer':
+                this.setState({
+                    showApps: payload.show,
+                });
                 break;
         }
     },
@@ -1604,11 +1615,13 @@ module.exports = React.createClass({
 
         var auxPanel = (
             <AuxPanel ref="auxPanel" room={this.state.room}
+              userId={MatrixClientPeg.get().credentials.userId}
               conferenceHandler={this.props.ConferenceHandler}
               draggingFile={this.state.draggingFile}
               displayConfCallNotification={this.state.displayConfCallNotification}
               maxHeight={this.state.auxPanelMaxHeight}
-              onResize={this.onChildResize} >
+              onResize={this.onChildResize}
+              showApps={this.state.showApps && !this.state.editingRoomSettings} >
                 { aux }
             </AuxPanel>
         );
@@ -1621,8 +1634,14 @@ module.exports = React.createClass({
         if (canSpeak) {
             messageComposer =
                 <MessageComposer
-                    room={this.state.room} onResize={this.onChildResize} uploadFile={this.uploadFile}
-                    callState={this.state.callState} tabComplete={this.tabComplete} opacity={ this.props.opacity }/>;
+                    room={this.state.room}
+                    onResize={this.onChildResize}
+                    uploadFile={this.uploadFile}
+                    callState={this.state.callState}
+                    tabComplete={this.tabComplete}
+                    opacity={ this.props.opacity }
+                    showApps={ this.state.showApps }
+                />;
         }
 
         // TODO: Why aren't we storing the term/scope/count in this format

src/components/views/elements/AppTile.js

@@ -0,0 +1,102 @@
+/*
+Copyright 2017 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.
+*/
+
+'use strict';
+
+import React from 'react';
+import MatrixClientPeg from '../../../MatrixClientPeg';
+import { _t } from '../../../languageHandler';
+
+export default React.createClass({
+    displayName: 'AppTile',
+
+    propTypes: {
+        id: React.PropTypes.string.isRequired,
+        url: React.PropTypes.string.isRequired,
+        name: React.PropTypes.string.isRequired,
+        room: React.PropTypes.object.isRequired,
+    },
+
+    getDefaultProps: function() {
+        return {
+            url: "",
+        };
+    },
+
+    _onEditClick: function() {
+        console.log("Edit widget %s", this.props.id);
+    },
+
+    _onDeleteClick: function() {
+        console.log("Delete widget %s", this.props.id);
+        const appsStateEvents = this.props.room.currentState.getStateEvents('im.vector.modular.widgets', '');
+        if (!appsStateEvents) {
+            return;
+        }
+        const appsStateEvent = appsStateEvents.getContent();
+        if (appsStateEvent[this.props.id]) {
+            delete appsStateEvent[this.props.id];
+            MatrixClientPeg.get().sendStateEvent(
+                this.props.room.roomId,
+                'im.vector.modular.widgets',
+                appsStateEvent,
+                '',
+            ).then(() => {
+                console.log('Deleted widget');
+            }, (e) => {
+                console.error('Failed to delete widget', e);
+            });
+        }
+    },
+
+    formatAppTileName: function() {
+        let appTileName = "No name";
+        if(this.props.name && this.props.name.trim()) {
+            appTileName = this.props.name.trim();
+            appTileName = appTileName[0].toUpperCase() + appTileName.slice(1).toLowerCase();
+        }
+        return appTileName;
+    },
+
+    render: function() {
+        return (
+            <div className={this.props.fullWidth ? "mx_AppTileFullWidth" : "mx_AppTile"} id={this.props.id}>
+                <div className="mx_AppTileMenuBar">
+                    {this.formatAppTileName()}
+                    <span className="mx_AppTileMenuBarWidgets">
+                        {/* Edit widget */}
+                        {/* <img
+                            src="img/edit.svg"
+                            className="mx_filterFlipColor mx_AppTileMenuBarWidget mx_AppTileMenuBarWidgetPadding"
+                            width="8" height="8" alt="Edit"
+                            onClick={this._onEditClick}
+                        /> */}
+
+                        {/* Delete widget */}
+                        <img src="img/cancel.svg"
+                        className="mx_filterFlipColor mx_AppTileMenuBarWidget"
+                        width="8" height="8" alt={_t("Cancel")}
+                        onClick={this._onDeleteClick}
+                        />
+                    </span>
+                </div>
+                <div className="mx_AppTileBody">
+                    <iframe ref="appFrame" src={this.props.url} allowFullScreen="true"></iframe>
+                </div>
+            </div>
+        );
+    },
+});

src/components/views/rooms/AppsDrawer.js

@@ -0,0 +1,223 @@
+/*
+Copyright 2017 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.
+*/
+
+'use strict';
+
+import React from 'react';
+import MatrixClientPeg from '../../../MatrixClientPeg';
+import AppTile from '../elements/AppTile';
+import Modal from '../../../Modal';
+import dis from '../../../dispatcher';
+import sdk from '../../../index';
+import SdkConfig from '../../../SdkConfig';
+import ScalarAuthClient from '../../../ScalarAuthClient';
+import ScalarMessaging from '../../../ScalarMessaging';
+import { _t } from '../../../languageHandler';
+
+
+module.exports = React.createClass({
+    displayName: 'AppsDrawer',
+
+    propTypes: {
+        room: React.PropTypes.object.isRequired,
+    },
+
+    getInitialState: function() {
+        return {
+            apps: this._getApps(),
+        };
+    },
+
+    componentWillMount: function() {
+        ScalarMessaging.startListening();
+        MatrixClientPeg.get().on("RoomState.events", this.onRoomStateEvents);
+    },
+
+    componentDidMount: function() {
+        this.scalarClient = null;
+        if (SdkConfig.get().integrations_ui_url && SdkConfig.get().integrations_rest_url) {
+            this.scalarClient = new ScalarAuthClient();
+            this.scalarClient.connect().done(() => {
+                this.forceUpdate();
+                if (this.state.apps && this.state.apps.length < 1) {
+                    this.onClickAddWidget();
+                }
+            // TODO -- Handle Scalar errors
+            // },
+            // (err) => {
+            //     this.setState({
+            //         scalar_error: err,
+            //     });
+            });
+        }
+    },
+
+    componentWillUnmount: function() {
+        ScalarMessaging.stopListening();
+        if (MatrixClientPeg.get()) {
+            MatrixClientPeg.get().removeListener("RoomState.events", this.onRoomStateEvents);
+        }
+    },
+
+    /**
+     * Encodes a URI according to a set of template variables. Variables will be
+     * passed through encodeURIComponent.
+     * @param {string} pathTemplate The path with template variables e.g. '/foo/$bar'.
+     * @param {Object} variables The key/value pairs to replace the template
+     * variables with. E.g. { "$bar": "baz" }.
+     * @return {string} The result of replacing all template variables e.g. '/foo/baz'.
+     */
+    encodeUri: function(pathTemplate, variables) {
+        for (const key in variables) {
+            if (!variables.hasOwnProperty(key)) {
+                continue;
+            }
+            pathTemplate = pathTemplate.replace(
+                key, encodeURIComponent(variables[key]),
+            );
+        }
+        return pathTemplate;
+    },
+
+    _initAppConfig: function(appId, app) {
+        const user = MatrixClientPeg.get().getUser(this.props.userId);
+        const params = {
+            '$matrix_user_id': this.props.userId,
+            '$matrix_room_id': this.props.room.roomId,
+            '$matrix_display_name': user ? user.displayName : this.props.userId,
+            '$matrix_avatar_url': user ? MatrixClientPeg.get().mxcUrlToHttp(user.avatarUrl) : '',
+        };
+
+        if(app.data) {
+            Object.keys(app.data).forEach((key) => {
+                params['$' + key] = app.data[key];
+            });
+        }
+
+        app.id = appId;
+        app.name = app.name || app.type;
+        app.url = this.encodeUri(app.url, params);
+
+        // switch(app.type) {
+        //     case 'etherpad':
+        //         app.queryParams = '?userName=' + this.props.userId +
+        //             '&padId=' + this.props.room.roomId;
+        //         break;
+        //     case 'jitsi': {
+        //
+        //         app.queryParams = '?confId=' + app.data.confId +
+        //             '&displayName=' + encodeURIComponent(user.displayName) +
+        //             '&avatarUrl=' + encodeURIComponent(MatrixClientPeg.get().mxcUrlToHttp(user.avatarUrl)) +
+        //             '&email=' + encodeURIComponent(this.props.userId) +
+        //             '&isAudioConf=' + app.data.isAudioConf;
+        //
+        //         break;
+        //     }
+        //     case 'vrdemo':
+        //         app.queryParams = '?roomAlias=' + encodeURIComponent(app.data.roomAlias);
+        //         break;
+        // }
+
+        return app;
+    },
+
+    onRoomStateEvents: function(ev, state) {
+        if (ev.getRoomId() !== this.props.room.roomId || ev.getType() !== 'im.vector.modular.widgets') {
+            return;
+        }
+        this._updateApps();
+    },
+
+    _getApps: function() {
+        const appsStateEvents = this.props.room.currentState.getStateEvents('im.vector.modular.widgets', '');
+        if (!appsStateEvents) {
+            return [];
+        }
+        const appsStateEvent = appsStateEvents.getContent();
+        if (Object.keys(appsStateEvent).length < 1) {
+            return [];
+        }
+
+        return Object.keys(appsStateEvent).map((appId) => {
+            return this._initAppConfig(appId, appsStateEvent[appId]);
+        });
+    },
+
+    _updateApps: function() {
+        const apps = this._getApps();
+        if (apps.length < 1) {
+            dis.dispatch({
+                action: 'appsDrawer',
+                show: false,
+            });
+        }
+        this.setState({
+            apps: apps,
+        });
+    },
+
+    onClickAddWidget: function(e) {
+        if (e) {
+            e.preventDefault();
+        }
+
+        const IntegrationsManager = sdk.getComponent("views.settings.IntegrationsManager");
+        const src = (this.scalarClient !== null && this.scalarClient.hasCredentials()) ?
+                this.scalarClient.getScalarInterfaceUrlForRoom(this.props.room.roomId) :
+                null;
+        Modal.createDialog(IntegrationsManager, {
+            src: src,
+            onFinished: ()=>{
+                if (e) {
+                    this.props.onCancelClick(e);
+                }
+            },
+        }, "mx_IntegrationsManager");
+    },
+
+    render: function() {
+        const apps = this.state.apps.map(
+            (app, index, arr) => {
+                return <AppTile
+                    key={app.name}
+                    id={app.id}
+                    url={app.url}
+                    name={app.name}
+                    fullWidth={arr.length<2 ? true : false}
+                    room={this.props.room}
+                    userId={this.props.userId}
+                />;
+            });
+
+        const addWidget = this.state.apps && this.state.apps.length < 2 &&
+            (<div onClick={this.onClickAddWidget}
+                            role="button"
+                            tabIndex="0"
+                            className="mx_AddWidget_button"
+                            title={_t('Add a widget')}>
+                            [+] {_t('Add a widget')}
+                        </div>);
+
+        return (
+            <div className="mx_AppsDrawer">
+                <div id="apps" className="mx_AppsContainer">
+                    {apps}
+                </div>
+                {addWidget}
+            </div>
+        );
+    },
+});

src/components/views/rooms/AuxPanel.js

@@ -19,7 +19,9 @@ import MatrixClientPeg from "../../../MatrixClientPeg";
 import sdk from '../../../index';
 import dis from "../../../dispatcher";
 import ObjectUtils from '../../../ObjectUtils';
-import  { _t, _tJsx} from '../../../languageHandler';
+import AppsDrawer from './AppsDrawer';
+import { _t, _tJsx} from '../../../languageHandler';
+import UserSettingsStore from '../../../UserSettingsStore';
 
 
 module.exports = React.createClass({
@@ -28,6 +30,8 @@ module.exports = React.createClass({
     propTypes: {
         // js-sdk room object
         room: React.PropTypes.object.isRequired,
+        userId: React.PropTypes.string.isRequired,
+        showApps: React.PropTypes.bool,
 
         // Conference Handler implementation
         conferenceHandler: React.PropTypes.object,
@@ -70,10 +74,10 @@ module.exports = React.createClass({
     },
 
     render: function() {
-        var CallView = sdk.getComponent("voip.CallView");
-        var TintableSvg = sdk.getComponent("elements.TintableSvg");
+        const CallView = sdk.getComponent("voip.CallView");
+        const TintableSvg = sdk.getComponent("elements.TintableSvg");
 
-        var fileDropTarget = null;
+        let fileDropTarget = null;
         if (this.props.draggingFile) {
             fileDropTarget = (
                 <div className="mx_RoomView_fileDropTarget">
@@ -87,14 +91,13 @@ module.exports = React.createClass({
             );
         }
 
-        var conferenceCallNotification = null;
+        let conferenceCallNotification = null;
         if (this.props.displayConfCallNotification) {
             let supportedText = '';
             let joinNode;
             if (!MatrixClientPeg.get().supportsVoip()) {
                 supportedText = _t(" (unsupported)");
-            }
-            else {
+            } else {
                 joinNode = (<span>
                     {_tJsx(
                         "Join as <voiceText>voice</voiceText> or <videoText>video</videoText>.",
@@ -105,7 +108,6 @@ module.exports = React.createClass({
                         ]
                     )}
                 </span>);
-
             }
             // XXX: the translation here isn't great: appending ' (unsupported)' is likely to not make sense in many languages,
             // but there are translations for this in the languages we do have so I'm leaving it for now.
@@ -118,7 +120,7 @@ module.exports = React.createClass({
             );
         }
 
-        var callView = (
+        const callView = (
             <CallView ref="callView" room={this.props.room}
                 ConferenceHandler={this.props.conferenceHandler}
                 onResize={this.props.onResize}
@@ -126,8 +128,17 @@ module.exports = React.createClass({
             />
         );
 
+        let appsDrawer = null;
+        if(UserSettingsStore.isFeatureEnabled('matrix_apps') && this.props.showApps) {
+            appsDrawer = <AppsDrawer ref="appsDrawer"
+                room={this.props.room}
+                userId={this.props.userId}
+                maxHeight={this.props.maxHeight}/>;
+        }
+
         return (
             <div className="mx_RoomView_auxPanel" style={{maxHeight: this.props.maxHeight}} >
+                { appsDrawer }
                 { fileDropTarget }
                 { callView }
                 { conferenceCallNotification }

src/components/views/rooms/MessageComposer.js

@@ -13,16 +13,15 @@ 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.
 */
-var React = require('react');
+import React from 'react';
 import { _t } from '../../../languageHandler';
-var CallHandler = require('../../../CallHandler');
-var MatrixClientPeg = require('../../../MatrixClientPeg');
-var Modal = require('../../../Modal');
-var sdk = require('../../../index');
-var dis = require('../../../dispatcher');
+import CallHandler from '../../../CallHandler';
+import MatrixClientPeg from '../../../MatrixClientPeg';
+import Modal from '../../../Modal';
+import sdk from '../../../index';
+import dis from '../../../dispatcher';
 import Autocomplete from './Autocomplete';
 import classNames from 'classnames';
-
 import UserSettingsStore from '../../../UserSettingsStore';
 
 
@@ -32,6 +31,8 @@ export default class MessageComposer extends React.Component {
         this.onCallClick = this.onCallClick.bind(this);
         this.onHangupClick = this.onHangupClick.bind(this);
         this.onUploadClick = this.onUploadClick.bind(this);
+        this.onShowAppsClick = this.onShowAppsClick.bind(this);
+        this.onHideAppsClick = this.onHideAppsClick.bind(this);
         this.onUploadFileSelected = this.onUploadFileSelected.bind(this);
         this.uploadFiles = this.uploadFiles.bind(this);
         this.onVoiceCallClick = this.onVoiceCallClick.bind(this);
@@ -57,7 +58,6 @@ export default class MessageComposer extends React.Component {
             },
             showFormatting: UserSettingsStore.getSyncedSetting('MessageComposer.showFormatting', false),
         };
-
     }
 
     componentDidMount() {
@@ -127,7 +127,7 @@ export default class MessageComposer extends React.Component {
                 if(shouldUpload) {
                     // MessageComposer shouldn't have to rely on its parent passing in a callback to upload a file
                     if (files) {
-                        for(var i=0; i<files.length; i++) {
+                        for(let i=0; i<files.length; i++) {
                             this.props.uploadFile(files[i]);
                         }
                     }
@@ -139,7 +139,7 @@ export default class MessageComposer extends React.Component {
     }
 
     onHangupClick() {
-        var call = CallHandler.getCallForRoom(this.props.room.roomId);
+        const call = CallHandler.getCallForRoom(this.props.room.roomId);
         //var call = CallHandler.getAnyActiveCall();
         if (!call) {
             return;
@@ -152,20 +152,68 @@ export default class MessageComposer extends React.Component {
         });
     }
 
+    // _startCallApp(isAudioConf) {
+        // dis.dispatch({
+        //     action: 'appsDrawer',
+        //     show: true,
+        // });
+
+        // const appsStateEvents = this.props.room.currentState.getStateEvents('im.vector.modular.widgets', '');
+        // let appsStateEvent = {};
+        // if (appsStateEvents) {
+        //     appsStateEvent = appsStateEvents.getContent();
+        // }
+        // if (!appsStateEvent.videoConf) {
+        //     appsStateEvent.videoConf = {
+        //         type: 'jitsi',
+        //         // FIXME -- This should not be localhost
+        //         url: 'http://localhost:8000/jitsi.html',
+        //         data: {
+        //             confId: this.props.room.roomId.replace(/[^A-Za-z0-9]/g, '_') + Date.now(),
+        //             isAudioConf: isAudioConf,
+        //         },
+        //     };
+        //     MatrixClientPeg.get().sendStateEvent(
+        //         this.props.room.roomId,
+        //         'im.vector.modular.widgets',
+        //         appsStateEvent,
+        //         '',
+        //     ).then(() => console.log('Sent state'), (e) => console.error(e));
+        // }
+    // }
+
     onCallClick(ev) {
+        // NOTE -- Will be replaced by Jitsi code (currently commented)
         dis.dispatch({
             action: 'place_call',
             type: ev.shiftKey ? "screensharing" : "video",
             room_id: this.props.room.roomId,
         });
+        // this._startCallApp(false);
     }
 
     onVoiceCallClick(ev) {
+        // NOTE -- Will be replaced by Jitsi code (currently commented)
         dis.dispatch({
             action: 'place_call',
-            type: 'voice',
+            type: "voice",
             room_id: this.props.room.roomId,
         });
+        // this._startCallApp(true);
+    }
+
+    onShowAppsClick(ev) {
+        dis.dispatch({
+            action: 'appsDrawer',
+            show: true,
+        });
+    }
+
+    onHideAppsClick(ev) {
+        dis.dispatch({
+            action: 'appsDrawer',
+            show: false,
+        });
     }
 
     onInputContentChanged(content: string, selection: {start: number, end: number}) {
@@ -216,19 +264,19 @@ export default class MessageComposer extends React.Component {
     }
 
     render() {
-        var me = this.props.room.getMember(MatrixClientPeg.get().credentials.userId);
-        var uploadInputStyle = {display: 'none'};
-        var MemberAvatar = sdk.getComponent('avatars.MemberAvatar');
-        var TintableSvg = sdk.getComponent("elements.TintableSvg");
-        var MessageComposerInput = sdk.getComponent("rooms.MessageComposerInput" +
+        const me = this.props.room.getMember(MatrixClientPeg.get().credentials.userId);
+        const uploadInputStyle = {display: 'none'};
+        const MemberAvatar = sdk.getComponent('avatars.MemberAvatar');
+        const TintableSvg = sdk.getComponent("elements.TintableSvg");
+        const MessageComposerInput = sdk.getComponent("rooms.MessageComposerInput" +
             (UserSettingsStore.isFeatureEnabled('rich_text_editor') ? "" : "Old"));
 
-        var controls = [];
+        const controls = [];
 
         controls.push(
             <div key="controls_avatar" className="mx_MessageComposer_avatar">
                 <MemberAvatar member={me} width={24} height={24} />
-            </div>
+            </div>,
         );
 
         let e2eImg, e2eTitle, e2eClass;
@@ -247,16 +295,15 @@ export default class MessageComposer extends React.Component {
         controls.push(
             <img key="e2eIcon" className={e2eClass} src={e2eImg} width="12" height="12"
                 alt={e2eTitle} title={e2eTitle}
-            />
+            />,
         );
-        var callButton, videoCallButton, hangupButton;
+        let callButton, videoCallButton, hangupButton, showAppsButton, hideAppsButton;
         if (this.props.callState && this.props.callState !== 'ended') {
             hangupButton =
                 <div key="controls_hangup" className="mx_MessageComposer_hangup" onClick={this.onHangupClick}>
                     <img src="img/hangup.svg" alt={ _t('Hangup') } title={ _t('Hangup') } width="25" height="26"/>
                 </div>;
-        }
-        else {
+        } else {
             callButton =
                 <div key="controls_call" className="mx_MessageComposer_voicecall" onClick={this.onVoiceCallClick} title={ _t('Voice call') }>
                     <TintableSvg src="img/icon-call.svg" width="35" height="35"/>
@@ -267,14 +314,29 @@ export default class MessageComposer extends React.Component {
                 </div>;
         }
 
-        var canSendMessages = this.props.room.currentState.maySendMessage(
+        // Apps
+        if (UserSettingsStore.isFeatureEnabled('matrix_apps')) {
+            if (this.props.showApps) {
+                hideAppsButton =
+                    <div key="controls_hide_apps" className="mx_MessageComposer_apps" onClick={this.onHideAppsClick} title={_t("Hide Apps")}>
+                        <TintableSvg src="img/icons-apps-active.svg" width="35" height="35"/>
+                    </div>;
+            } else {
+                showAppsButton =
+                    <div key="show_apps" className="mx_MessageComposer_apps" onClick={this.onShowAppsClick} title={_t("Show Apps")}>
+                        <TintableSvg src="img/icons-apps.svg" width="35" height="35"/>
+                    </div>;
+            }
+        }
+
+        const canSendMessages = this.props.room.currentState.maySendMessage(
             MatrixClientPeg.get().credentials.userId);
 
         if (canSendMessages) {
             // This also currently includes the call buttons. Really we should
             // check separately for whether we can call, but this is slightly
             // complex because of conference calls.
-            var uploadButton = (
+            const uploadButton = (
                 <div key="controls_upload" className="mx_MessageComposer_upload"
                         onClick={this.onUploadClick} title={ _t('Upload file') }>
                     <TintableSvg src="img/icons-upload.svg" width="35" height="35"/>
@@ -300,7 +362,7 @@ export default class MessageComposer extends React.Component {
 
             controls.push(
                 <MessageComposerInput
-                    ref={c => this.messageComposerInput = c}
+                    ref={(c) => this.messageComposerInput = c}
                     key="controls_input"
                     onResize={this.props.onResize}
                     room={this.props.room}
@@ -316,13 +378,15 @@ export default class MessageComposer extends React.Component {
                 uploadButton,
                 hangupButton,
                 callButton,
-                videoCallButton
+                videoCallButton,
+                showAppsButton,
+                hideAppsButton,
             );
         } else {
             controls.push(
                 <div key="controls_error" className="mx_MessageComposer_noperm_error">
                     { _t('You do not have permission to post to this room') }
-                </div>
+                </div>,
             );
         }
 
@@ -340,7 +404,7 @@ export default class MessageComposer extends React.Component {
 
         const {style, blockType} = this.state.inputState;
         const formatButtons = ["bold", "italic", "strike", "underline", "code", "quote", "bullet", "numbullet"].map(
-            name => {
+            (name) => {
                 const active = style.includes(name) || blockType === name;
                 const suffix = active ? '-o-n' : '';
                 const onFormatButtonClicked = this.onFormatButtonClicked.bind(this, name);
@@ -403,5 +467,8 @@ MessageComposer.propTypes = {
     uploadFile: React.PropTypes.func.isRequired,
 
     // opacity for dynamic UI fading effects
-    opacity: React.PropTypes.number
+    opacity: React.PropTypes.number,
+
+    // string representing the current room app drawer state
+    showApps: React.PropTypes.bool,
 };

src/i18n/strings/en_US.json

@@ -1,4 +1,5 @@
 {
+    "Add a widget": "Add a widget",
     "af": "Afrikaans",
     "ar-ae": "Arabic (U.A.E.)",
     "ar-bh": "Arabic (Bahrain)",
@@ -311,6 +312,7 @@
     "Guests cannot join this room even if explicitly invited.": "Guests cannot join this room even if explicitly invited.",
     "had": "had",
     "Hangup": "Hangup",
+    "Hide Apps": "Hide Apps",
     "Hide read receipts": "Hide read receipts",
     "Hide Text Formatting Toolbar": "Hide Text Formatting Toolbar",
     "Historical": "Historical",
@@ -362,6 +364,7 @@
     "Markdown is disabled": "Markdown is disabled",
     "Markdown is enabled": "Markdown is enabled",
     "matrix-react-sdk version:": "matrix-react-sdk version:",
+    "Matrix Apps": "Matrix Apps",
     "Members only": "Members only",
     "Message not sent due to unknown devices being present": "Message not sent due to unknown devices being present",
     "Missing room_id in request": "Missing room_id in request",
@@ -464,6 +467,7 @@
     "%(senderName)s set a profile picture.": "%(senderName)s set a profile picture.",
     "%(senderName)s set their display name to %(displayName)s.": "%(senderName)s set their display name to %(displayName)s.",
     "Settings": "Settings",
+    "Show Apps": "Show Apps",
     "Show panel": "Show panel",
     "Show timestamps in 12 hour format (e.g. 2:30pm)": "Show timestamps in 12 hour format (e.g. 2:30pm)",
     "Signed Out": "Signed Out",