private static function get_existing_posts( $post_type = '', $search_term = '', $page = 1 ) {

		$args = array(
			'order'          => 'ASC',
			'orderby'        => 'post_title',
			'paged'          => $page,
			'post_status'    => array( 'publish', 'draft', 'pending' ),
			'posts_per_page' => 10,
		);

		if ( $post_type ) {
			$args['post_type'] = $post_type;
		}

		if ( ! current_user_can( 'manage_lifterlms' ) ) {

			$instructor = llms_get_instructor();
			$parents    = $instructor->get( 'parent_instructors' );
			if ( ! $parents ) {
				$parents = array();
			}

			$args['author__in'] = array_unique(
				array_merge(
					array( get_current_user_id() ),
					$instructor->get_assistants(),
					$parents
				)
			);

		}

		self::$search_term = $search_term;
		add_filter( 'posts_where', array( __CLASS__, 'get_existing_posts_where' ), 10, 2 );
		$query = new WP_Query( $args );
		remove_filter( 'posts_where', array( __CLASS__, 'get_existing_posts_where' ), 10, 2 );

		$posts = array();

		if ( $query->have_posts() ) {

			foreach ( $query->posts as $post ) {

				$post = llms_get_post( $post );

				$parents = array();

				if ( method_exists( $post, 'is_orphan' ) && $post->is_orphan() ) {

					$action = 'attach';

				} else {

					$action = 'clone';

					$course_id = false;
					$lesson_id = false;

					if ( 'lesson' === $post->get( 'type' ) ) {
						$course_id = $post->get( 'parent_course' );
					} elseif ( 'llms_quiz' === $post->get( 'type' ) ) {
						$lesson_id = $post->get( 'lesson_id' );
						$course    = $post->get_course();
						if ( $course ) {
							$course_id = $course->get( 'id' );
						}
					}

					if ( $lesson_id ) {
						// Translators: %1$s = Lesson title; %2$d = Lesson id.
						$parents['lesson'] = sprintf( __( 'Lesson: %1$s (#%2$d)', 'lifterlms' ), '<em>' . get_the_title( $lesson_id ) . '</em>', $lesson_id );
					}
					if ( $course_id ) {
						// Translators: %1$s = Course title; %2$d - Course id.
						$parents['course'] = sprintf( __( 'Course: %1$s (#%2$d)', 'lifterlms' ), '<em>' . get_the_title( $course_id ) . '</em>', $course_id );
					}
				}

				$posts[] = array(
					'action'  => $action,
					'data'    => $post,
					'id'      => $post->get( 'id' ),
					'parents' => $parents,
					'text'    => sprintf( '%1$s (#%2$d)', $post->get( 'title' ), $post->get( 'id' ) ),
				);

			}
		}

		$ret = array(
			'results'    => $posts,
			'pagination' => array(
				'more' => ( $page < $query->max_num_pages ),
			),
		);

		return $ret;

	}