bp_activity_type_supports( string $activity_type = '', string $feature = '' )

function bp_activity_type_supports( $activity_type = '', $feature = '' ) {
	$retval = false;

	$bp = buddypress();

	switch ( $feature ) {
		/**
		 * Does this activity type support comment tracking?
		 *
		 * eg. 'new_blog_post' and 'new_blog_comment' will both return true.
		 */
		case 'post-type-comment-tracking' :
			// Set the activity track global if not set yet
			if ( empty( $bp->activity->track ) ) {
				$bp->activity->track = bp_activity_get_post_types_tracking_args();
			}

			if ( ! empty( $bp->activity->track[ $activity_type ]->comments_tracking ) ) {
				$retval = true;
			}
			break;

		/**
		 * Is this a parent activity type that support post comments?
		 *
		 * eg. 'new_blog_post' will return true; 'new_blog_comment' will return false.
		 */
		case 'post-type-comment-reply' :
			// Set the activity track global if not set yet.
			if ( empty( $bp->activity->track ) ) {
				$bp->activity->track = bp_activity_get_post_types_tracking_args();
			}

			if ( ! empty( $bp->activity->track[ $activity_type ]->comments_tracking ) && ! empty( $bp->activity->track[ $activity_type ]->comment_action_id ) ) {
				$retval = true;
			}
			break;

		/**
		 * Does this activity type support comment & reply?
		 */
		case 'comment-reply' :
			// Set the activity track global if not set yet.
			if ( empty( $bp->activity->track ) ) {
				$bp->activity->track = bp_activity_get_post_types_tracking_args();
			}

			// Post Type activities
			if ( ! empty( $bp->activity->track[ $activity_type ] ) ) {
				if ( isset( $bp->activity->track[ $activity_type ]->activity_comment ) ) {
					$retval = $bp->activity->track[ $activity_type ]->activity_comment;
				}

				// Eventually override with comment synchronization feature.
				if ( isset( $bp->activity->track[ $activity_type ]->comments_tracking ) ) {
					$retval = $bp->activity->track[ $activity_type ]->comments_tracking && ! bp_disable_blogforum_comments();
				}

			// Retired Forums component
			} elseif ( 'new_forum_topic' === $activity_type || 'new_forum_post' === $activity_type ) {
				$retval = ! bp_disable_blogforum_comments();

			// By Default, all other activity types are supporting comments.
			} else {
				$retval = true;
			}
			break;
	}

	return $retval;
}