From 955e9088d7dcc488aa27707e43eb581b45e19582 Mon Sep 17 00:00:00 2001
From: Eugen Rochko <eugen@zeonfederated.com>
Date: Tue, 28 Feb 2017 23:48:41 +0100
Subject: [PATCH] Fix #561 - Detect presence of audio in video, hide mute
 toggle when none

---
 .../components/components/video_player.jsx    | 61 ++++++++++++++++---
 .../status/components/detailed_status.jsx     |  2 +-
 2 files changed, 55 insertions(+), 8 deletions(-)

diff --git a/app/assets/javascripts/components/components/video_player.jsx b/app/assets/javascripts/components/components/video_player.jsx
index ccd67ddf0..5c2cef21a 100644
--- a/app/assets/javascripts/components/components/video_player.jsx
+++ b/app/assets/javascripts/components/components/video_player.jsx
@@ -61,12 +61,14 @@ const VideoPlayer = React.createClass({
     media: ImmutablePropTypes.map.isRequired,
     width: React.PropTypes.number,
     height: React.PropTypes.number,
-    sensitive: React.PropTypes.bool
+    sensitive: React.PropTypes.bool,
+    intl: React.PropTypes.object.isRequired,
+    autoplay: React.PropTypes.bool
   },
 
   getDefaultProps () {
     return {
-      width: 196,
+      width: 239,
       height: 110
     };
   },
@@ -75,7 +77,8 @@ const VideoPlayer = React.createClass({
     return {
       visible: !this.props.sensitive,
       preview: true,
-      muted: true
+      muted: true,
+      hasAudio: true
     };
   },
 
@@ -108,8 +111,42 @@ const VideoPlayer = React.createClass({
     });
   },
 
+  setRef (c) {
+    this.video = c;
+  },
+
+  handleLoadedData () {
+    if (('WebkitAppearance' in document.documentElement.style && this.video.audioTracks.length === 0) || this.video.mozHasAudio === false) {
+      this.setState({ hasAudio: false });
+    }
+  },
+
+  componentDidMount () {
+    if (!this.video) {
+      return;
+    }
+
+    this.video.addEventListener('loadeddata', this.handleLoadedData);
+  },
+
+  componentDidUpdate () {
+    if (!this.video) {
+      return;
+    }
+
+    this.video.addEventListener('loadeddata', this.handleLoadedData);
+  },
+
+  componentWillUnmount () {
+    if (!this.video) {
+      return;
+    }
+
+    this.video.removeEventListener('loadeddata', this.handleLoadedData);
+  },
+
   render () {
-    const { media, intl, width, height, sensitive } = this.props;
+    const { media, intl, width, height, sensitive, autoplay } = this.props;
 
     let spoilerButton = (
       <div style={spoilerButtonStyle} >
@@ -117,6 +154,16 @@ const VideoPlayer = React.createClass({
       </div>
     );
 
+    let muteButton = '';
+
+    if (this.state.hasAudio) {
+      muteButton = (
+        <div style={muteStyle}>
+          <IconButton title={intl.formatMessage(messages.toggle_sound)} icon={this.state.muted ? 'volume-off' : 'volume-up'} onClick={this.handleClick} />
+        </div>
+      );
+    }
+
     if (!this.state.visible) {
       if (sensitive) {
         return (
@@ -137,7 +184,7 @@ const VideoPlayer = React.createClass({
       }
     }
 
-    if (this.state.preview) {
+    if (this.state.preview && !autoplay) {
       return (
         <div style={{ cursor: 'pointer', position: 'relative', marginTop: '8px', width: `${width}px`, height: `${height}px`, background: `url(${media.get('preview_url')}) no-repeat center`, backgroundSize: 'cover' }} onClick={this.handleOpen}>
           {spoilerButton}
@@ -149,8 +196,8 @@ const VideoPlayer = React.createClass({
     return (
       <div style={{ cursor: 'default', marginTop: '8px', overflow: 'hidden', width: `${width}px`, height: `${height}px`, boxSizing: 'border-box', background: '#000', position: 'relative' }}>
         {spoilerButton}
-        <div style={muteStyle}><IconButton title={intl.formatMessage(messages.toggle_sound)} icon={this.state.muted ? 'volume-off' : 'volume-up'} onClick={this.handleClick} /></div>
-        <video src={media.get('url')} autoPlay='true' loop={true} muted={this.state.muted} style={videoStyle} onClick={this.handleVideoClick} />
+        {muteButton}
+        <video ref={this.setRef} src={media.get('url')} autoPlay='true' loop={true} muted={this.state.muted} style={videoStyle} onClick={this.handleVideoClick} />
       </div>
     );
   }
diff --git a/app/assets/javascripts/components/features/status/components/detailed_status.jsx b/app/assets/javascripts/components/features/status/components/detailed_status.jsx
index 8a7c0c5d5..caa46ff3c 100644
--- a/app/assets/javascripts/components/features/status/components/detailed_status.jsx
+++ b/app/assets/javascripts/components/features/status/components/detailed_status.jsx
@@ -39,7 +39,7 @@ const DetailedStatus = React.createClass({
 
     if (status.get('media_attachments').size > 0) {
       if (status.getIn(['media_attachments', 0, 'type']) === 'video') {
-        media = <VideoPlayer sensitive={status.get('sensitive')} media={status.getIn(['media_attachments', 0])} width={317} height={178} />;
+        media = <VideoPlayer sensitive={status.get('sensitive')} media={status.getIn(['media_attachments', 0])} width={300} height={150} autoplay />;
       } else {
         media = <MediaGallery sensitive={status.get('sensitive')} media={status.get('media_attachments')} height={300} onOpenMedia={this.props.onOpenMedia} />;
       }