Custom courses list for CoursePress Pro

wpmudev_cp_custom_course_lists.php

<?php
/**
 * Plugin Name: Custom courses list for CoursePress Pro
 * Version:     1.0
 * Description: Provides a shortcode that outputs a custom list of courses
 * Author:      Panos Lyrakis (WPMU DEV)
 * Author URI:  http://premium.wpmudev.org
 * Plugin URI:  http://premium.wpmudev.org/project/coursepress/
 * License:     GPL2
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * TextDomain:  cp
 */


if( ! class_exists( 'WPMUDEV_CP_Custom_List ') ){

	class WPMUDEV_CP_Custom_List{

		private static $_instance = null;


		public static function get_instance() {
            if ( is_null( self::$_instance ) ) {
                self::$_instance = new WPMUDEV_CP_Custom_List();
            }

            return self::$_instance;
        }


        private function __construct() {

        	//Allow shortcodes in widgets:
        	//add_filter('widget_text','do_shortcode');

        	//Override atts of [course_archive] shortcode
        	add_filter( 'shortcode_atts_course_archive', array( $this, 'shortcode_atts_course_archive' ), 10, 1 );

        	//Override box $template
        	add_filter( 'coursepress_template_course_list_box', array( $this, 'template_course_list_box' ), 10, 3 );
        }


        public function shortcode_atts_course_archive( $atts ){

        	if( ! is_main_query() || ! in_the_loop() ){
        		//The number of courses in a widget
				$atts['posts_per_page'] = 4;
			}	

			return $atts;

        }


        /*
		* Return the custom shortcode
        */
        public function course_archive_template( $template, $a ){

        	//It will return custom shortcode is in widget
			if( ! is_main_query() || ! in_the_loop() ) {
				$template = trim( '[wpmudev_course_list_box]' );
			}	

			return $template;

		}


		public function template_course_list_box( $template, $course_id, $a ){

			if( is_main_query() && in_the_loop() ) {
				return $template;
			}

			$clickable_label = sanitize_text_field( $a['clickable_label'] );
			$echo = cp_is_true( $a['echo'] );
			$clickable = cp_is_true( $a['clickable'] );
			$url = CoursePress_Data_Course::get_course_url( $course_id );

			$course_image = CoursePress_Data_Course::get_setting( $course_id, 'listing_image' );
			$has_thumbnail = ! empty( $course_image );

			$clickable_link = $clickable ? 'data-link="' . esc_url( $url ) . '"' : '';
			$clickable_class = $clickable ? 'clickable' : '';
			$clickable_text = $clickable ? '<div class="clickable-label">' . $clickable_label . '</div>' : '';
			$button_label = $a['button_label'];
			$button_link = $url;
			$withdraw_from_course = '';

			if ( ! empty( $a['override_button_link'] ) ) {
				$button_link = $a['override_button_link'];
			}

			$button_text = sprintf( '<a href="%s" rel="bookmark" class="button apply-button apply-button-details">%s</a>', esc_url( $button_link ), $button_label );
			$instructor_link = $clickable ? 'no' : 'yes';
			$thumbnail_class = $has_thumbnail ? 'has-thumbnail' : '';

			$completed = false;
			$student_progress = false;
			if ( is_user_logged_in() ) {
				$student_progress = CoursePress_Data_Student::get_completion_data( get_current_user_id(), $course_id );
				$completed = isset( $student_progress['completion']['completed'] ) && ! empty( $student_progress['completion']['completed'] );
				
				// Withdraw from course
				 
				$show_withdraw_link = cp_is_true( $a['show_withdraw_link'] );
				if ( $show_withdraw_link && ! $completed ) {
					$withdraw_link = add_query_arg(
						array(
							'_wpnonce' => wp_create_nonce( 'coursepress_student_withdraw' ),
							'course_id' => $course_id,
							'student_id' => get_current_user_id(),
						)
					);
					$withdraw_from_course = sprintf( '<a href="%s" class="cp-withdraw-student">%s</a>', esc_url( $withdraw_link ), __( 'Withdraw', 'cp' ) );
				}
			}
			$completion_class = CoursePress_Data_Course::course_class( $course_id );
			$completion_class = implode( ' ', $completion_class );

			// Add filter to post classes

			// Override button
			if ( ! empty( $a['override_button_text'] ) && ! empty( $a['override_button_link'] ) ) {
				$button_text = '<button class="coursepress-course-link" data-link="' . esc_url( $a['override_button_link'] ) . '">' . esc_attr( $a['override_button_text'] ) . '</button>';
			}

			
			// schema.org
			 
			$schema = apply_filters( 'coursepress_schema', '', 'itemscope' );
			$course_title = do_shortcode( sprintf( '[course_title course_id="%s"]', $course_id ) );
			$course_title = sprintf( '<a href="%s" rel="bookmark">%s</a>', esc_url( $url ), $course_title );

			$template = '<div class="course course_list_box_item course_' . $course_id . ' ' . $clickable_class . ' ' . $completion_class . ' ' . $thumbnail_class . '" ' . $clickable_link . ' ' . $schema .'>
					[course_thumbnail course_id="' . $course_id . '"]
					<div class="course-information">
						' . $course_title . $button_text . $clickable_text . '
					</div>
				</div>
				';

				$template = apply_filters( 'wpmudev_coursepress_template_course_list_box', $template, $course_id, $a );

				$content = do_shortcode( $template );

				if ( $echo ) {
					echo $content;
				}

				return $content;

		}

	}

	add_action( 'plugins_loaded', function(){
		$GLOBALS['WPMUDEV_CP_Custom_List'] = WPMUDEV_CP_Custom_List::get_instance();
	} );

}

 ?>