FEAT: Automatically copy invite URL after creating a room (#7581)

* Resolves #7501
- Automatically copy invite URL after creating a room

* Resolves #7501
- Automatically copy invite URL after creating a room

* - Adding config flag to enable the feature

config.js

     // set or the lobby is not enabled.
     // enableInsecureRoomNameWarning: false,
 
+    // Whether to automatically copy invitation URL after creating a room.
+    // Document should be focused for this option to work
+    // enableAutomaticUrlCopy: false,
+
     // Stats
     //
 

react/features/base/config/configWhitelist.js

     'enableNoAudioDetection',
     'enableNoisyMicDetection',
     'enableTcc',
+    'enableAutomaticUrlCopy',
     'etherpad_base',
     'failICE',
     'feedbackPercentage',

react/features/base/premeeting/components/web/CopyMeetingUrl.js

     /**
      * Used for translation.
      */
-    t: Function
+    t: Function,
+
+    /**
+     * Used to determine if invitation link should be automatically copied
+     * after creating a meeting.
+     */
+    _enableAutomaticUrlCopy: boolean,
 };
 
 type State = {
         this._hideLinkCopied = this._hideLinkCopied.bind(this);
         this._showCopyLink = this._showCopyLink.bind(this);
         this._showLinkCopied = this._showLinkCopied.bind(this);
+        this._copyUrlAutomatically = this._copyUrlAutomatically.bind(this);
     }
 
     _copyUrl: () => void;
         });
     }
 
+    _copyUrlAutomatically: () => void;
+
+    /**
+     * Attempts to automatically copy invitation URL.
+     * Document has to be focused in order for this to work.
+     *
+     * @private
+     * @returns {void}
+     */
+    _copyUrlAutomatically() {
+        navigator.clipboard.writeText(this.props.url)
+            .then(() => {
+                this._showLinkCopied();
+                window.setTimeout(this._hideLinkCopied, COPY_TIMEOUT);
+            });
+    }
+
+    /**
+     * Implements React's {@link Component#componentDidMount()}. Invoked
+     * immediately before mounting occurs.
+     *
+     * @inheritdoc
+     */
+    componentDidMount() {
+        const { _enableAutomaticUrlCopy } = this.props;
+
+        if (_enableAutomaticUrlCopy) {
+            setTimeout(this._copyUrlAutomatically, 2000);
+        }
+    }
+
     /**
      * Implements React's {@link Component#render()}.
      *
  * @returns {Object}
  */
 function mapStateToProps(state) {
+    const { enableAutomaticUrlCopy } = state['features/base/config'];
+
     return {
-        url: getCurrentConferenceUrl(state)
+        url: getCurrentConferenceUrl(state),
+        _enableAutomaticUrlCopy: enableAutomaticUrlCopy || false
     };
 }