Core::bp_ld_get_progress_course_percentage( $user_id,  $course_id )

	public function bp_ld_get_progress_course_percentage( $user_id, $course_id ) {

		if ( empty( $user_id ) ) {
			// $current_user = wp_get_current_user();
			if ( is_user_logged_in() ) {
				$user_id = get_current_user_id();
			} else {
				$user_id = 0;
			}
		}

		if ( empty( $course_id ) ) {
			$course_id = learndash_get_course_id();
		}

		if ( empty( $course_id ) ) {
			return '';
		}

		$completed = 0;
		$total     = false;

		if ( ! empty( $user_id ) ) {

			$course_progress = get_user_meta( $user_id, '_sfwd-course_progress', true );

			$percentage = 0;
			$message    = '';

			if ( ( ! empty( $course_progress ) ) && ( isset( $course_progress[ $course_id ] ) ) && ( ! empty( $course_progress[ $course_id ] ) ) ) {
				if ( isset( $course_progress[ $course_id ]['completed'] ) ) {
					$completed = absint( $course_progress[ $course_id ]['completed'] );
				}

				if ( isset( $course_progress[ $course_id ]['total'] ) ) {
					$total = absint( $course_progress[ $course_id ]['total'] );
				}
			} else {
				$total = 0;
			}
		}

		// If $total is still false we calculate the total from course steps.
		if ( false === $total ) {
			$total = learndash_get_course_steps_count( $course_id );
		}

		if ( $total > 0 ) {
			$percentage = intval( $completed * 100 / $total );
			$percentage = ( $percentage > 100 ) ? 100 : $percentage;
		} else {
			$percentage = 0;
		}

		return $percentage;

	}