function bp_activity_action_sitewide_feed() {
	$bp = buddypress();

	if ( ! bp_is_activity_component() || ! bp_is_current_action( 'feed' ) || bp_is_user() || ! empty( $bp->groups->current_group ) ) {
		return false;
	}

	$link = bp_get_activity_directory_permalink();

	// Setup the feed.
	buddypress()->activity->feed = new BP_Activity_Feed( array(
		'id'            => 'sitewide',

		/* translators: %s Site Name */
		'title'         => sprintf( __( '%s | Site-Wide Activity', 'buddypress' ), bp_get_site_name() ),
		'link'          => $link,
		'description'   => __( 'Activity feed for the entire site.', 'buddypress' ),
		'activity_args' => 'display_comments=threaded'
	) );

	if ( ! buddypress()->activity->feed->enabled ) {
		bp_core_redirect( $link );
	}
}