Core::bp_get_courses_progress( $user_id,  $sort_order = 'desc' )

	public function bp_get_courses_progress ( $user_id, $sort_order = 'desc' ) {
		$course_completion_percentage = array();

		if ( ! $course_completion_percentage = wp_cache_get ( $user_id, 'ld_courses_progress' ) ) {
			$course_progress = get_user_meta( $user_id, '_sfwd-course_progress', true );

			if ( ! empty( $course_progress ) ) {

				foreach ( $course_progress as $course_id => $coursep ) {
					// We take default progress value as 1 % rather than 0%
					$course_completion_percentage[ $course_id ] = 1;//

					if ( $coursep['total'] == 0 ) {
						continue;
					}

					$course_steps_count = learndash_get_course_steps_count( $course_id );
					$course_steps_completed = learndash_course_get_completed_steps( $user_id, $course_id, $coursep );

					$completed_on = get_user_meta( $user_id, 'course_completed_' . $course_id, true );
					if ( !empty( $completed_on ) ) {

						$coursep['completed'] = $course_steps_count;
						$coursep['total'] = $course_steps_count;

					} else {
						$coursep['total'] = $course_steps_count;
						$coursep['completed'] = $course_steps_completed;

						if ( $coursep['completed'] > $coursep['total'] )
							$coursep['completed'] = $coursep['total'];
					}

					// cannot divide by 0
					if ( $coursep['total'] == 0 ) {
						$course_completion_percentage[ $course_id ] = 0;
					} else {
						$course_completion_percentage[ $course_id ] = ceil( ( $coursep['completed'] * 100 ) / $coursep['total'] );
					}
				}
			}

			//Avoid running the queries multiple times if user's course progress is empty
			$course_completion_percentage = !empty( $course_completion_percentage ) ? $course_completion_percentage : 'empty';

			wp_cache_set( $user_id, $course_completion_percentage, 'ld_courses_progress' );
		}

		$course_completion_percentage = 'empty' !== $course_completion_percentage ? $course_completion_percentage : array();

		if ( !empty( $course_completion_percentage ) ) {
			// Sort.
			if ( 'asc' == $sort_order ) {
				asort( $course_completion_percentage );
			} else {
				arsort( $course_completion_percentage );
			}
		}

		return $course_completion_percentage;
	}