feat(external-api): Add recording download link available event (#10229)

modules/API/API.js

         });
     }
 
+    /**
+     * Notify external application (if API is enabled) that the current recording link is
+     * available.
+     *
+     * @param {string} link - The recording download link.
+     * @returns {void}
+     */
+    notifyRecordingLinkAvailable(link: string) {
+        this._sendEvent({
+            name: 'recording-link-available',
+            link
+        });
+    }
+
     /**
      * Notify external application (if API is enabled) that a participant is knocking in the lobby.
      *

modules/API/external/external_api.js

     'password-required': 'passwordRequired',
     'proxy-connection-event': 'proxyConnectionEvent',
     'raise-hand-updated': 'raiseHandUpdated',
+    'recording-link-available': 'recordingLinkAvailable',
     'recording-status-changed': 'recordingStatusChanged',
     'video-ready-to-close': 'readyToClose',
     'video-conference-joined': 'videoConferenceJoined',

react/features/recording/actions.any.js

 import { getRecordingLink, getResourceId, isSavingRecordingOnDropbox } from './functions';
 import logger from './logger';
 
+declare var APP: Object;
+
 /**
  * Clears the data of every recording sessions.
  *
                 try {
                     const link = await getRecordingLink(recordingSharingUrl, sessionId, region, tenant);
 
+                    if (typeof APP === 'object') {
+                        APP.API.notifyRecordingLinkAvailable(link);
+                    }
+
                     // add the option to copy recording link
                     dialogProps.customActionNameKey = 'recording.copyLink';
                     dialogProps.customActionHandler = () => copyText(link);