From 0e5091adba3089c0b8e35e473b0a19f8ee36982e Mon Sep 17 00:00:00 2001
From: Tudor-Ovidiu Avram <tudor.potecaru@8x8.com>
Date: Mon, 29 Jun 2020 10:45:58 +0300
Subject: [PATCH] feat(prejoin) Expose prejoin app

---
 css/_premeeting-screens.scss                  |  24 ++--
 index.html                                    |  10 ++
 react/features/base/app/components/BaseApp.js |   4 +-
 .../components/web/PreMeetingScreen.js        |  36 ++++-
 .../base/premeeting/components/web/Preview.js |  37 ++++--
 react/features/base/tracks/functions.js       |  85 +++++++++++-
 react/features/base/tracks/middleware.js      |   4 +
 react/features/prejoin/components/Prejoin.js  | 123 +++++++++++-------
 .../features/prejoin/components/PrejoinApp.js |  93 +++++++++++++
 react/index.web.js                            |  23 +++-
 static/prejoin.html                           |  41 ++++++
 11 files changed, 400 insertions(+), 80 deletions(-)
 create mode 100644 react/features/prejoin/components/PrejoinApp.js
 create mode 100644 static/prejoin.html

diff --git a/css/_premeeting-screens.scss b/css/_premeeting-screens.scss
index de1f76afa..7f490b867 100644
--- a/css/_premeeting-screens.scss
+++ b/css/_premeeting-screens.scss
@@ -1,17 +1,21 @@
 /**
  * Shared style for full screen local track based dialogs/modals.
  */
-.premeeting-screen {
+ .premeeting-screen,
+  .preview-overlay {
+     position: absolute;
+     left: 0;
+     right: 0;
+     top: 0;
+     bottom: 0;
+  }
+
+ .premeeting-screen {
     align-items: stretch;
-    background: #1C2025;
-    bottom: 0;
+    background: radial-gradient(50% 50% at 50% 50%, #5D95C7 0%, #376288 100%), #FFFFFF;
     display: flex;
     flex-direction: column;
     font-size: 1.3em;
-    left: 0;
-    position: absolute;
-    right: 0;
-    top: 0;
     z-index: $toolbarZ + 1;
 
     .action-btn {
@@ -74,9 +78,13 @@
         }
     }
 
+    .preview-overlay {
+        background-image: linear-gradient(transparent, black);
+        z-index: $toolbarZ + 1;
+    }
+
     .content {
         align-items: center;
-        background-image: linear-gradient(transparent, black);
         display: flex;
         flex: 1;
         flex-direction: column;
diff --git a/index.html b/index.html
index 30cea926e..2a222ae99 100644
--- a/index.html
+++ b/index.html
@@ -8,7 +8,17 @@
 
     <link rel="apple-touch-icon" href="images/apple-touch-icon.png">
     <link rel="stylesheet" href="css/all.css">
+    <script>
+        document.addEventListener('DOMContentLoaded', () => {
+            if (!JitsiMeetJS.app) {
+                return;
+            }
 
+            JitsiMeetJS.app.renderEntryPoint({
+                Component: JitsiMeetJS.app.entryPoints.APP
+            })
+        })
+    </script>
     <script>
         // IE11 and earlier can be identified via their user agent and be
         // redirected to a page that is known to have no newer js syntax.
diff --git a/react/features/base/app/components/BaseApp.js b/react/features/base/app/components/BaseApp.js
index c6af96180..55f1a5672 100644
--- a/react/features/base/app/components/BaseApp.js
+++ b/react/features/base/app/components/BaseApp.js
@@ -122,14 +122,14 @@ export default class BaseApp extends Component<*, State> {
      * @returns {ReactElement}
      */
     render() {
-        const { route: { component }, store } = this.state;
+        const { route: { component, props }, store } = this.state;
 
         if (store) {
             return (
                 <I18nextProvider i18n = { i18next }>
                     <Provider store = { store }>
                         <Fragment>
-                            { this._createMainElement(component) }
+                            { this._createMainElement(component, props) }
                             <SoundCollection />
                             { this._createExtraElement() }
                             { this._renderDialogContainer() }
diff --git a/react/features/base/premeeting/components/web/PreMeetingScreen.js b/react/features/base/premeeting/components/web/PreMeetingScreen.js
index eeed03bf9..f25170723 100644
--- a/react/features/base/premeeting/components/web/PreMeetingScreen.js
+++ b/react/features/base/premeeting/components/web/PreMeetingScreen.js
@@ -24,6 +24,16 @@ type Props = {
      */
     name?: string,
 
+    /**
+     * Indicates whether the avatar should be shown when video is off
+     */
+    showAvatar: boolean,
+
+    /**
+     * Indicates whether the label and copy url action should be shown
+     */
+    showConferenceInfo: boolean,
+
     /**
      * Title of the screen.
      */
@@ -45,13 +55,23 @@ type Props = {
  * on the prejoin screen (pre-connection) or lobby (post-connection).
  */
 export default class PreMeetingScreen extends PureComponent<Props> {
+    /**
+     * Default values for {@code Prejoin} component's properties.
+     *
+     * @static
+     */
+    static defaultProps = {
+        showAvatar: true,
+        showConferenceInfo: true
+    };
+
     /**
      * Implements {@code PureComponent#render}.
      *
      * @inheritdoc
      */
     render() {
-        const { name, title, videoMuted, videoTrack } = this.props;
+        const { name, showAvatar, showConferenceInfo, title, videoMuted, videoTrack } = this.props;
 
         return (
             <div
@@ -59,13 +79,19 @@ export default class PreMeetingScreen extends PureComponent<Props> {
                 id = 'lobby-screen'>
                 <Preview
                     name = { name }
+                    showAvatar = { showAvatar }
                     videoMuted = { videoMuted }
                     videoTrack = { videoTrack } />
+                {!videoMuted && <div className = 'preview-overlay' />}
                 <div className = 'content'>
-                    <div className = 'title'>
-                        { title }
-                    </div>
-                    <CopyMeetingUrl />
+                    {showConferenceInfo && (
+                        <>
+                            <div className = 'title'>
+                                { title }
+                            </div>
+                            <CopyMeetingUrl />
+                        </>
+                    )}
                     { this.props.children }
                     <div className = 'media-btn-container'>
                         <AudioSettingsButton visible = { true } />
diff --git a/react/features/base/premeeting/components/web/Preview.js b/react/features/base/premeeting/components/web/Preview.js
index 7bd8fd1cd..43d1ad71c 100644
--- a/react/features/base/premeeting/components/web/Preview.js
+++ b/react/features/base/premeeting/components/web/Preview.js
@@ -14,6 +14,11 @@ export type Props = {
      */
     name: string,
 
+    /**
+     * Indicates whether the avatar should be shown when video is off
+     */
+    showAvatar: boolean,
+
     /**
      * Flag signaling the visibility of camera preview.
      */
@@ -32,7 +37,7 @@ export type Props = {
  * @returns {ReactElement}
  */
 function Preview(props: Props) {
-    const { name, videoMuted, videoTrack } = props;
+    const { name, showAvatar, videoMuted, videoTrack } = props;
 
     if (!videoMuted && videoTrack) {
         return (
@@ -44,19 +49,27 @@ function Preview(props: Props) {
         );
     }
 
-    return (
-        <div
-            className = 'no-video'
-            id = 'preview'>
-            <Avatar
-                className = 'preview-avatar'
-                displayName = { name }
-                participantId = 'local'
-                size = { 200 } />
-        </div>
-    );
+    if (showAvatar) {
+        return (
+            <div
+                className = 'no-video'
+                id = 'preview'>
+                <Avatar
+                    className = 'preview-avatar'
+                    displayName = { name }
+                    participantId = 'local'
+                    size = { 200 } />
+            </div>
+        );
+    }
+
+    return null;
 }
 
+Preview.defaultProps = {
+    showAvatar: true
+};
+
 /**
  * Maps part of the Redux state to the props of this component.
  *
diff --git a/react/features/base/tracks/functions.js b/react/features/base/tracks/functions.js
index 950894379..e3d47807c 100644
--- a/react/features/base/tracks/functions.js
+++ b/react/features/base/tracks/functions.js
@@ -1,7 +1,7 @@
 /* global APP */
 
 import JitsiMeetJS, { JitsiTrackErrors, browser } from '../lib-jitsi-meet';
-import { MEDIA_TYPE } from '../media';
+import { MEDIA_TYPE, setAudioMuted } from '../media';
 import {
     getUserSelectedCameraDeviceId,
     getUserSelectedMicDeviceId
@@ -125,6 +125,89 @@ export function createLocalTracksF(options = {}, firePermissionPromptIsShownEven
         }));
 }
 
+/**
+ * Returns an object containing a promise which resolves with the created tracks &
+ * the errors resulting from that process.
+ *
+ * @returns {Promise<JitsiLocalTrack>}
+ *
+ * @todo Refactor to not use APP
+ */
+export function createPrejoinTracks() {
+    const errors = {};
+    const initialDevices = [ 'audio' ];
+    const requestedAudio = true;
+    let requestedVideo = false;
+    const { startAudioOnly, startWithAudioMuted, startWithVideoMuted } = APP.store.getState()['features/base/settings'];
+
+    // Always get a handle on the audio input device so that we have statistics even if the user joins the
+    // conference muted. Previous implementation would only acquire the handle when the user first unmuted,
+    // which would results in statistics ( such as "No audio input" or "Are you trying to speak?") being available
+    // only after that point.
+    if (startWithAudioMuted) {
+        APP.store.dispatch(setAudioMuted(true));
+    }
+
+    if (!startWithVideoMuted && !startAudioOnly) {
+        initialDevices.push('video');
+        requestedVideo = true;
+    }
+
+    let tryCreateLocalTracks;
+
+    if (!requestedAudio && !requestedVideo) {
+        // Resolve with no tracks
+        tryCreateLocalTracks = Promise.resolve([]);
+    } else {
+        tryCreateLocalTracks = createLocalTracksF({ devices: initialDevices }, true)
+                .catch(err => {
+                    if (requestedAudio && requestedVideo) {
+
+                        // Try audio only...
+                        errors.audioAndVideoError = err;
+
+                        return (
+                            createLocalTracksF({ devices: [ 'audio' ] }, true));
+                    } else if (requestedAudio && !requestedVideo) {
+                        errors.audioOnlyError = err;
+
+                        return [];
+                    } else if (requestedVideo && !requestedAudio) {
+                        errors.videoOnlyError = err;
+
+                        return [];
+                    }
+                    logger.error('Should never happen');
+                })
+                .catch(err => {
+                    // Log this just in case...
+                    if (!requestedAudio) {
+                        logger.error('The impossible just happened', err);
+                    }
+                    errors.audioOnlyError = err;
+
+                    // Try video only...
+                    return requestedVideo
+                        ? createLocalTracksF({ devices: [ 'video' ] }, true)
+                        : [];
+                })
+                .catch(err => {
+                    // Log this just in case...
+                    if (!requestedVideo) {
+                        logger.error('The impossible just happened', err);
+                    }
+                    errors.videoOnlyError = err;
+
+                    return [];
+                });
+    }
+
+    return {
+        tryCreateLocalTracks,
+        errors
+    };
+}
+
 /**
  * Returns local audio track.
  *
diff --git a/react/features/base/tracks/middleware.js b/react/features/base/tracks/middleware.js
index 65a975f8d..cf8f2380b 100644
--- a/react/features/base/tracks/middleware.js
+++ b/react/features/base/tracks/middleware.js
@@ -143,6 +143,10 @@ MiddlewareRegistry.register(store => next => action => {
         if (typeof APP !== 'undefined') {
             const result = next(action);
 
+            if (isPrejoinPageVisible(store.getState())) {
+                return result;
+            }
+
             const { jitsiTrack } = action.track;
             const muted = jitsiTrack.isMuted();
             const participantID = jitsiTrack.getParticipantId();
diff --git a/react/features/prejoin/components/Prejoin.js b/react/features/prejoin/components/Prejoin.js
index 830f1b586..8156ecbe9 100644
--- a/react/features/prejoin/components/Prejoin.js
+++ b/react/features/prejoin/components/Prejoin.js
@@ -79,11 +79,21 @@ type Props = {
      */
     setJoinByPhoneDialogVisiblity: Function,
 
+    /**
+     * Indicates whether the avatar should be shown when video is off
+     */
+    showAvatar: boolean,
+
     /**
      * Flag signaling the visibility of camera preview.
      */
     showCameraPreview: boolean,
 
+    /**
+     * Flag signaling the visibility of join label, input and buttons
+     */
+    showJoinActions: boolean,
+
     /**
      * If 'JoinByPhoneDialog' is visible or not.
      */
@@ -112,6 +122,15 @@ type State = {
  * This component is displayed before joining a meeting.
  */
 class Prejoin extends Component<Props, State> {
+    /**
+     * Default values for {@code Prejoin} component's properties.
+     *
+     * @static
+     */
+    static defaultProps = {
+        showJoinActions: true
+    };
+
     /**
      * Initializes a new {@code Prejoin} instance.
      *
@@ -223,8 +242,10 @@ class Prejoin extends Component<Props, State> {
             joinConference,
             joinConferenceWithoutAudio,
             name,
+            showAvatar,
             showCameraPreview,
             showDialog,
+            showJoinActions,
             t,
             videoTrack
         } = this.props;
@@ -236,61 +257,65 @@ class Prejoin extends Component<Props, State> {
             <PreMeetingScreen
                 footer = { this._renderFooter() }
                 name = { name }
+                showAvatar = { showAvatar }
+                showConferenceInfo = { showJoinActions }
                 title = { t('prejoin.joinMeeting') }
                 videoMuted = { !showCameraPreview }
                 videoTrack = { videoTrack }>
-                <div className = 'prejoin-input-area-container'>
-                    <div className = 'prejoin-input-area'>
-                        <InputField
-                            onChange = { _setName }
-                            onSubmit = { joinConference }
-                            placeHolder = { t('dialog.enterDisplayName') }
-                            value = { name } />
+                {showJoinActions && (
+                    <div className = 'prejoin-input-area-container'>
+                        <div className = 'prejoin-input-area'>
+                            <InputField
+                                onChange = { _setName }
+                                onSubmit = { joinConference }
+                                placeHolder = { t('dialog.enterDisplayName') }
+                                value = { name } />
 
-                        <div className = 'prejoin-preview-dropdown-container'>
-                            <InlineDialog
-                                content = { <div className = 'prejoin-preview-dropdown-btns'>
-                                    <div
-                                        className = 'prejoin-preview-dropdown-btn'
-                                        onClick = { joinConferenceWithoutAudio }>
-                                        <Icon
-                                            className = 'prejoin-preview-dropdown-icon'
-                                            size = { 24 }
-                                            src = { IconVolumeOff } />
-                                        { t('prejoin.joinWithoutAudio') }
-                                    </div>
-                                    {hasJoinByPhoneButton && <div
-                                        className = 'prejoin-preview-dropdown-btn'
-                                        onClick = { _showDialog }>
-                                        <Icon
-                                            className = 'prejoin-preview-dropdown-icon'
-                                            size = { 24 }
-                                            src = { IconPhone } />
-                                        { t('prejoin.joinAudioByPhone') }
-                                    </div>}
-                                </div> }
-                                isOpen = { showJoinByPhoneButtons }
-                                onClose = { _onDropdownClose }>
-                                <ActionButton
-                                    disabled = { joinButtonDisabled }
-                                    hasOptions = { true }
-                                    onClick = { joinConference }
-                                    onOptionsClick = { _onOptionsClick }
-                                    type = 'primary'>
-                                    { t('prejoin.joinMeeting') }
-                                </ActionButton>
-                            </InlineDialog>
+                            <div className = 'prejoin-preview-dropdown-container'>
+                                <InlineDialog
+                                    content = { <div className = 'prejoin-preview-dropdown-btns'>
+                                        <div
+                                            className = 'prejoin-preview-dropdown-btn'
+                                            onClick = { joinConferenceWithoutAudio }>
+                                            <Icon
+                                                className = 'prejoin-preview-dropdown-icon'
+                                                size = { 24 }
+                                                src = { IconVolumeOff } />
+                                            { t('prejoin.joinWithoutAudio') }
+                                        </div>
+                                        {hasJoinByPhoneButton && <div
+                                            className = 'prejoin-preview-dropdown-btn'
+                                            onClick = { _showDialog }>
+                                            <Icon
+                                                className = 'prejoin-preview-dropdown-icon'
+                                                size = { 24 }
+                                                src = { IconPhone } />
+                                            { t('prejoin.joinAudioByPhone') }
+                                        </div>}
+                                    </div> }
+                                    isOpen = { showJoinByPhoneButtons }
+                                    onClose = { _onDropdownClose }>
+                                    <ActionButton
+                                        disabled = { joinButtonDisabled }
+                                        hasOptions = { true }
+                                        onClick = { joinConference }
+                                        onOptionsClick = { _onOptionsClick }
+                                        type = 'primary'>
+                                        { t('prejoin.joinMeeting') }
+                                    </ActionButton>
+                                </InlineDialog>
+                            </div>
+                        </div>
+
+                        <div className = 'prejoin-checkbox-container'>
+                            <input
+                                className = 'prejoin-checkbox'
+                                onChange = { _onCheckboxChange }
+                                type = 'checkbox' />
+                            <span>{t('prejoin.doNotShow')}</span>
                         </div>
                     </div>
-
-                    <div className = 'prejoin-checkbox-container'>
-                        <input
-                            className = 'prejoin-checkbox'
-                            onChange = { _onCheckboxChange }
-                            type = 'checkbox' />
-                        <span>{t('prejoin.doNotShow')}</span>
-                    </div>
-                </div>
+                )}
                 { showDialog && (
                     <JoinByPhoneDialog
                         joinConferenceWithoutAudio = { joinConferenceWithoutAudio }
diff --git a/react/features/prejoin/components/PrejoinApp.js b/react/features/prejoin/components/PrejoinApp.js
new file mode 100644
index 000000000..50cef7133
--- /dev/null
+++ b/react/features/prejoin/components/PrejoinApp.js
@@ -0,0 +1,93 @@
+// @flow
+
+import { AtlasKitThemeProvider } from '@atlaskit/theme';
+import React from 'react';
+
+import { BaseApp } from '../../../features/base/app';
+import { setConfig } from '../../base/config';
+import { createPrejoinTracks } from '../../base/tracks';
+import { initPrejoin } from '../actions';
+
+import Prejoin from './Prejoin';
+
+type Props = {
+
+    /**
+     * Indicates whether the avatar should be shown when video is off
+     */
+    showAvatar: boolean,
+
+    /**
+     * Flag signaling the visibility of join label, input and buttons
+     */
+    showJoinActions: boolean,
+};
+
+/**
+ * Wrapper application for prejoin.
+ *
+ * @extends BaseApp
+ */
+export default class PrejoinApp extends BaseApp<Props> {
+    _init: Promise<*>;
+
+    /**
+     * Navigates to {@link Prejoin} upon mount.
+     *
+     * @returns {void}
+     */
+    componentDidMount() {
+        super.componentDidMount();
+
+        this._init.then(async () => {
+            const { store } = this.state;
+            const { dispatch } = store;
+            const { showAvatar, showJoinActions } = this.props;
+
+            super._navigate({
+                component: Prejoin,
+                props: {
+                    showAvatar,
+                    showJoinActions
+                }
+            });
+
+            const { startWithAudioMuted, startWithVideoMuted } = store.getState()['features/base/settings'];
+
+            dispatch(setConfig({
+                prejoinPageEnabled: true,
+                startWithAudioMuted,
+                startWithVideoMuted
+            }));
+
+            const { tryCreateLocalTracks, errors } = createPrejoinTracks();
+
+            const tracks = await tryCreateLocalTracks;
+
+            dispatch(initPrejoin(tracks, errors));
+        });
+    }
+
+    /**
+     * Overrides the parent method to inject {@link AtlasKitThemeProvider} as
+     * the top most component.
+     *
+     * @override
+     */
+    _createMainElement(component, props) {
+        return (
+            <AtlasKitThemeProvider mode = 'dark'>
+                { super._createMainElement(component, props) }
+            </AtlasKitThemeProvider>
+        );
+    }
+
+    /**
+     * Renders the platform specific dialog container.
+     *
+     * @returns {React$Element}
+     */
+    _renderDialogContainer() {
+        return null;
+    }
+}
diff --git a/react/index.web.js b/react/index.web.js
index 300d08419..c187f6e49 100644
--- a/react/index.web.js
+++ b/react/index.web.js
@@ -8,6 +8,8 @@ import { getJitsiMeetTransport } from '../modules/transport';
 import { App } from './features/app/components';
 import { getLogger } from './features/base/logging/functions';
 import { Platform } from './features/base/react';
+import { getJitsiMeetGlobalNS } from './features/base/util';
+import PrejoinApp from './features/prejoin/components/PrejoinApp';
 
 const logger = getLogger('index.web');
 const OS = Platform.OS;
@@ -20,9 +22,6 @@ document.addEventListener('DOMContentLoaded', () => {
 
     APP.connectionTimes['document.ready'] = now;
     logger.log('(TIME) document ready:\t', now);
-
-    // Render the main/root Component.
-    ReactDOM.render(<App />, document.getElementById('react'));
 });
 
 // Workaround for the issue when returning to a page with the back button and
@@ -56,3 +55,21 @@ window.addEventListener('beforeunload', () => {
     APP.API.dispose();
     getJitsiMeetTransport().dispose();
 });
+
+const globalNS = getJitsiMeetGlobalNS();
+
+globalNS.entryPoints = {
+    APP: App,
+    PREJOIN: PrejoinApp
+};
+
+globalNS.renderEntryPoint = ({
+    Component,
+    props = {},
+    elementId = 'react'
+}) => {
+    ReactDOM.render(
+        <Component { ...props } />,
+        document.getElementById(elementId)
+    );
+};
diff --git a/static/prejoin.html b/static/prejoin.html
new file mode 100644
index 000000000..2dc570273
--- /dev/null
+++ b/static/prejoin.html
@@ -0,0 +1,41 @@
+<html xmlns="http://www.w3.org/1999/html">
+  <head>
+    <meta charset="utf-8">
+    <meta http-equiv="content-type" content="text/html;charset=utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <!--#include virtual="/base.html" -->
+    <link rel="stylesheet" href="../css/all.css">
+    <script>
+      document.addEventListener('DOMContentLoaded', () => {
+          if (!JitsiMeetJS.app) {
+            return;
+          }
+
+          const url = new URL(window.location.href);
+          const params = new URLSearchParams(url.search);
+          const showAvatar = params.get('showAvatar') === 'true';
+          const showJoinActions = params.get('showJoinActions') === 'true';
+          const css = params.get('style');
+          const style = document.createElement('style');
+          style.appendChild(document.createTextNode(css));
+          document.head.appendChild(style);
+
+          JitsiMeetJS.app.renderEntryPoint({
+              Component: JitsiMeetJS.app.entryPoints.PREJOIN,
+              props: {
+                showAvatar,
+                showJoinActions
+              }
+          })
+      })
+    </script>
+    <!--#include virtual="/title.html" -->
+    <script>var config = {}</script><!-- adapt to your needs, i.e. set hosts and bosh path -->
+    <script>var interfaceConfig = {}</script>
+    <script src="../libs/lib-jitsi-meet.min.js?v=139"></script>
+    <script src="../libs/app.bundle.min.js?v=139"></script>
+  </head>
+  <body>
+    <div id="react"></div>
+  </body>
+</html>