[Glitch] Add download button to audio and video players

Port 3a451c820c to glitch-soc

Signed-off-by: Thibaut Girka <thib@sitedethib.com>

app/javascript/flavours/glitch/features/audio/index.js

@@ -12,6 +12,7 @@ const messages = defineMessages({
   pause: { id: 'video.pause', defaultMessage: 'Pause' },
   mute: { id: 'video.mute', defaultMessage: 'Mute sound' },
   unmute: { id: 'video.unmute', defaultMessage: 'Unmute sound' },
+  download: { id: 'video.download', defaultMessage: 'Download file' },
 });
 
 export default @injectIntl
@@ -218,6 +219,14 @@ class Audio extends React.PureComponent {
                 <span className='video-player__time-total'>{formatTime(this.state.duration || Math.floor(this.props.duration))}</span>
               </span>
             </div>
+
+            <div className='video-player__buttons right'>
+              <button type='button' aria-label={intl.formatMessage(messages.download)}>
+                <a className='video-player__download__icon' href={this.props.src} download>
+                  <Icon id={'download'} fixedWidth />
+                </a>
+              </button>
+            </div>
           </div>
         </div>
       </div>

app/javascript/flavours/glitch/features/video/index.js

@@ -19,6 +19,7 @@ const messages = defineMessages({
   close: { id: 'video.close', defaultMessage: 'Close video' },
   fullscreen: { id: 'video.fullscreen', defaultMessage: 'Full screen' },
   exit_fullscreen: { id: 'video.exit_fullscreen', defaultMessage: 'Exit full screen' },
+  download: { id: 'video.download', defaultMessage: 'Download file' },
 });
 
 export const formatTime = secondsNum => {
@@ -514,7 +515,13 @@ class Video extends React.PureComponent {
               {(!onCloseVideo && !editable) && <button type='button' aria-label={intl.formatMessage(messages.hide)} onClick={this.toggleReveal}><Icon id='eye-slash' fixedWidth /></button>}
               {(!fullscreen && onOpenVideo) && <button type='button' aria-label={intl.formatMessage(messages.expand)} onClick={this.handleOpenVideo}><Icon id='expand' fixedWidth /></button>}
               {onCloseVideo && <button type='button' aria-label={intl.formatMessage(messages.close)} onClick={this.handleCloseVideo}><Icon id='compress' fixedWidth /></button>}
+              <button type='button' aria-label={intl.formatMessage(messages.download)}>
+                <a className='video-player__download__icon' href={this.props.src} download>
+                  <Icon id={'download'} fixedWidth />
+                </a>
+              </button>
               <button type='button' aria-label={intl.formatMessage(fullscreen ? messages.exit_fullscreen : messages.fullscreen)} onClick={this.toggleFullscreen}><Icon id={fullscreen ? 'compress' : 'arrows-alt'} fixedWidth /></button>
+
             </div>
           </div>
         </div>

app/javascript/flavours/glitch/styles/components/media.scss

@@ -504,6 +504,10 @@
     display: flex;
     justify-content: space-between;
     padding-bottom: 10px;
+
+    .video-player__download__icon {
+      color: inherit;
+    }
   }
 
   &__buttons {