BP_Activity_Activity::total_favorite_count( int $user_id )

	public static function total_favorite_count( $user_id ) {

		// Get activities from user meta.
		$favorite_activity_entries = bp_get_user_meta( $user_id, 'bp_favorite_activities', true );
		if ( ! empty( $favorite_activity_entries ) ) {
			return count( $favorite_activity_entries );
		}

		// No favorites.
		return 0;
	}