/wp-content/plugins/learnpress/inc/custom-post-types/question.php

<?php



if ( !defined( 'ABSPATH' ) ) {

	exit; // Exit if accessed directly

}



if ( !class_exists( 'LP_Question_Post_Type' ) ) {

	// Base class for custom post type to extends

	learn_press_include( 'custom-post-types/abstract.php' );



	// class LP_Question_Post_Type

	class LP_Question_Post_Type extends LP_Abstract_Post_Type {

		function __construct() {

			add_action( 'admin_head', array( $this, 'init' ) );



			//add_action( 'init', array( $this, 'register_post_type' ) );

			//add_action( 'admin_head', array( $this, 'enqueue_script' ) );

			//add_action( 'admin_init', array( $this, 'add_meta_boxes' ), 5 );

			add_filter( 'manage_lp_question_posts_columns', array( $this, 'columns_head' ) );

			add_action( 'manage_lp_question_posts_custom_column', array( $this, 'columns_content' ), 10, 2 );

			add_filter( 'posts_join_paged', array( $this, 'posts_join_paged' ) );

			add_action( 'before_delete_post', array( $this, 'delete_question_answers' ) );



			//add_filter( 'posts_fields', array( $this, 'posts_fields' ) );

			add_filter( 'posts_where_paged', array( $this, 'posts_where_paged' ) );

			add_filter( 'posts_orderby', array( $this, 'posts_orderby' ) );

			add_filter( 'manage_edit-lp_question_sortable_columns', array( $this, 'columns_sortable' ) );



			parent::__construct();



		}



		function init() {

			global $pagenow, $post_type;

			$hidden = get_user_meta( get_current_user_id(), 'manageedit-lp_questioncolumnshidden', true );

			if ( !is_array( $hidden ) && empty( $hidden ) ) {

				update_user_meta( get_current_user_id(), 'manageedit-lp_questioncolumnshidden', array( 'taxonomy-question-tag' ) );

			}

		}



		/**

		 * Delete all answers assign to question being deleted

		 *

		 * @param $post_id

		 */

		function delete_question_answers( $post_id ) {

			global $wpdb;

			$query = $wpdb->prepare( "

				DELETE FROM {$wpdb->prefix}learnpress_question_answers

				WHERE question_id = %d

			", $post_id );

			$wpdb->query( $query );

			learn_press_reset_auto_increment( 'learnpress_question_answers' );



			// also, delete question from quiz

			$wpdb->query(

				$wpdb->prepare( "

					DELETE FROM {$wpdb->prefix}learnpress_quiz_questions

					WHERE question_id = %d

				", $post_id )

			);

			learn_press_reset_auto_increment( 'learnpress_quiz_questions' );

		}



		/**

		 * Register question post type

		 */

		static function register_post_type() {

			register_post_type( LP_QUESTION_CPT,

				array(

					'labels'             => array(

						'name'               => __( 'Question Bank', 'learnpress' ),

						'menu_name'          => __( 'Question Bank', 'learnpress' ),

						'singular_name'      => __( 'Question', 'learnpress' ),

						'all_items'          => __( 'Questions', 'learnpress' ),

						'view_item'          => __( 'View Question', 'learnpress' ),

						'add_new_item'       => __( 'Add New Question', 'learnpress' ),

						'add_new'            => __( 'Add New', 'learnpress' ),

						'edit_item'          => __( 'Edit Question', 'learnpress' ),

						'update_item'        => __( 'Update Question', 'learnpress' ),

						'search_items'       => __( 'Search Questions', 'learnpress' ),

						'not_found'          => __( 'No question found', 'learnpress' ),

						'not_found_in_trash' => __( 'No question found in trash', 'learnpress' ),

					),

					'public'             => false, // disable access directly via permalink url

					'publicly_queryable' => false,

					'show_ui'            => true,

					'has_archive'        => false,

					'capability_type'    => LP_LESSON_CPT,

					'map_meta_cap'       => true,

					'show_in_menu'       => 'learn_press',

					'show_in_admin_bar'  => true,

					'show_in_nav_menus'  => true,

					'supports'           => array( 'title', 'editor', 'revisions' ),

					'hierarchical'       => true,

					'rewrite'            => array( 'slug' => 'questions', 'hierarchical' => true, 'with_front' => false )

				)

			);





			register_taxonomy( 'question_tag', array( LP_QUESTION_CPT ),

				array(

					'labels'            => array(

						'name'          => __( 'Question Tag', 'learnpress' ),

						'menu_name'     => __( 'Tag', 'learnpress' ),

						'singular_name' => __( 'Tag', 'learnpress' ),

						'add_new_item'  => __( 'Add New Tag', 'learnpress' ),

						'all_items'     => __( 'All Tags', 'learnpress' )

					),

					'public'            => true,

					'hierarchical'      => false,

					'show_ui'           => true,

					'show_admin_column' => 'true',

					'show_in_nav_menus' => true,

					'rewrite'           => array(

						'slug'         => 'question-tag',

						'hierarchical' => false,

						'with_front'   => false

					),

				)

			);

			add_post_type_support( 'question', 'comments' );





		}



		static function add_meta_boxes() {



			new RW_Meta_Box(

				array(

					'id'     => 'question_answer',

					'title'  => __( 'Answer', 'learnpress' ),

					'pages'  => array( LP()->question_post_type ),

					'fields' => array(

						array(

							'name' => __( '', 'learnpress' ),

							'id'   => "_lp_question_answer",

							'type' => 'question'

						)

					)

				)

			);



			$meta_box = self::settings_meta_box();

			new RW_Meta_Box( $meta_box );

		}



		static function settings_meta_box() {

			$prefix   = '_lp_';

			$meta_box = array(

				'id'     => 'question_settings',

				'title'  => __( 'Settings', 'learnpress' ),

				'pages'  => array( LP()->question_post_type ),

				'fields' => array(

					array(

						'name'  => __( 'Mark for this question', 'learnpress' ),

						'id'    => "{$prefix}mark",

						'type'  => 'number',

						'clone' => false,

						'desc'  => __( 'Mark for choosing the right answer', 'learnpress' ),

						'min'   => 1,

						'std'   => 1

					),

					array(

						'name' => __( 'Question explanation', 'learnpress' ),

						'id'   => "{$prefix}explanation",

						'type' => 'textarea',

						'desc' => __( 'Explanation why an option is true and other is false', 'learnpress' ),

						'std'  => null

					),

					array(

						'name' => __( 'Question hint', 'learnpress' ),

						'id'   => "{$prefix}hint",

						'type' => 'textarea',

						'desc' => __( 'Instruction for user select the right answer', 'learnpress' ),

						'std'  => null

					)

				)

			);



			return apply_filters( 'learn_press_question_meta_box_args', $meta_box );

		}



		/**

		 * Enqueue scripts

		 */

		static function admin_scripts() {

			if ( !in_array( get_post_type(), array( LP()->question_post_type ) ) ) return;

			ob_start();

			?>

			<script>

				var form = $('#post');

				form.submit(function (evt) {

					var $title = $('#title'),

						is_error = false;

					if (0 == $title.val().length) {

						alert('<?php _e( 'Please enter the title of the question', 'learnpress' );?>');

						$title.focus();

						is_error = true;

					} else if ($('.lpr-question-types').length && ( 0 == $('.lpr-question-types').val().length )) {

						alert('<?php _e( 'Please a type of question', 'learnpress' );?>');

						$('.lpr-question-types').focus();

						is_error = true;

					}

					if (is_error) {

						evt.preventDefault();

						return false;

					}

				});

			</script>

			<?php

			$script = ob_get_clean();

			$script = preg_replace( '!</?script>!', '', $script );

			learn_press_enqueue_script( $script );

			ob_start();

			?>

			<script type="text/html" id="tmpl-form-quick-add-question">

				<div id="lpr-form-quick-add-question" class="lpr-quick-add-form">

					<input type="text">

					<select class="lpr-question-types lpr-select2" name="lpr_question[type]" id="lpr-quiz-question-type">

						<?php if ( $questions = learn_press_question_types() ): ?>

							<?php foreach ( $questions as $type => $name ): ?>

								<option value="<?php echo $type; ?>"><?php echo $name; ?></option>

							<?php endforeach; ?>

						<?php endif; ?>

					</select>

					<button class="button" data-action="add" type="button"><?php _e( 'Add [Enter]', 'learnpress' ); ?></button>

					<button data-action="cancel" class="button" type="button"><?php _e( 'Cancel [ESC]', 'learnpress' ); ?></button>

					<span class="lpr-ajaxload">...</span>

				</div>

			</script>

			<?php

			$js_template = ob_get_clean();

			learn_press_enqueue_script( $js_template, true );

		}



		/**

		 * Add columns to admin manage question page

		 *

		 * @param  array $columns

		 *

		 * @return array

		 */

		function columns_head( $columns ) {

			$pos         = array_search( 'title', array_keys( $columns ) );

			$new_columns = array(

				LP()->quiz_post_type => __( 'Quiz', 'learnpress' ),

				'type'               => __( 'Type', 'learnpress' )

			);



			if ( false !== $pos && !array_key_exists( LP()->quiz_post_type, $columns ) ) {

				$columns = array_merge(

					array_slice( $columns, 0, $pos + 1 ),

					$new_columns,

					array_slice( $columns, $pos + 1 )

				);

			}



			$user = wp_get_current_user();

			if ( in_array( LP()->teacher_role, $user->roles ) ) {

				unset( $columns['author'] );

			}

			return $columns;

		}



		/**

		 * Displaying the content of extra columns

		 *

		 * @param $name

		 * @param $post_id

		 */

		function columns_content( $name, $post_id ) {

			switch ( $name ) {

				case LP()->quiz_post_type:

					$quizzes = learn_press_get_question_quizzes( $post_id );

					if ( $quizzes ) {

						foreach ( $quizzes as $quiz ) {

							echo '<div><a href="' . esc_url( add_query_arg( array( 'filter_quiz' => $quiz->ID ) ) ) . '">' . get_the_title( $quiz->ID ) . '</a>';

							echo '<div class="row-actions">';

							printf( '<a href="%s">%s</a>', admin_url( sprintf( 'post.php?post=%d&action=edit', $quiz->ID ) ), __( 'Edit', 'learnpress' ) );

							echo "&nbsp;|&nbsp;";

							printf( '<a href="%s">%s</a>', get_the_permalink( $quiz->ID ), __( 'View', 'learnpress' ) );

							echo "&nbsp;|&nbsp;";

							if ( $quiz_id = learn_press_get_request( 'filter_quiz' ) ) {

								printf( '<a href="%s">%s</a>', remove_query_arg( 'filter_quiz' ), __( 'Remove Filter', 'learnpress' ) );

							} else {

								printf( '<a href="%s">%s</a>', add_query_arg( 'filter_quiz', $quiz->ID ), __( 'Filter', 'learnpress' ) );

							}

							echo '</div></div>';

						}



					} else {

						_e( 'Not assigned yet', 'learnpress' );

					}



					break;

				case 'type':

					echo learn_press_question_name_from_slug( get_post_meta( $post_id, '_lp_type', true ) );

			}

		}



		/**

		 * @param $join

		 *

		 * @return string

		 */

		function posts_join_paged( $join ) {

			if ( !$this->_is_archive() ) {

				return $join;

			}

			global $wpdb;

			if ( $quiz_id = $this->_filter_quiz() || ( $this->_get_orderby() == 'quiz-name' ) ) {

				$join .= " LEFT JOIN {$wpdb->prefix}learnpress_quiz_questions qq ON {$wpdb->posts}.ID = qq.question_id";

				$join .= " LEFT JOIN {$wpdb->posts} q ON q.ID = qq.quiz_id";

			}

			return $join;

		}



		/**

		 * @param $where

		 *

		 * @return mixed|string

		 */

		function posts_where_paged( $where ) {



			if ( !$this->_is_archive() ) {

				return $where;

			}



			global $wpdb;

			if ( $quiz_id = $this->_filter_quiz() ) {

				$where .= $wpdb->prepare( " AND (q.ID = %d)", $quiz_id );

			}

			return $where;

			if ( isset( $_GET['s'] ) ) {

				$s = $_GET['s'];

				if ( !empty( $s ) ) {

					$where = preg_replace(

						"/\.post_content\s+LIKE\s*(\'[^\']+\')\s*\)/",

						" .post_content LIKE '%$s%' ) OR ({$wpdb->posts}.post_title LIKE '%$s%' )", $where

					);

				}

			}



			return $where;

		}



		/**

		 * @param $order_by_statement

		 *

		 * @return string

		 */

		function posts_orderby( $order_by_statement ) {

			if ( !$this->_is_archive() ) {

				return $order_by_statement;

			}

			if ( isset ( $_GET['orderby'] ) && isset ( $_GET['order'] ) ) {

				switch ( $_GET['orderby'] ) {

					case 'quiz-name':

						$order_by_statement = "q.post_title {$_GET['order']}";

						break;

				}

			}

			return $order_by_statement;

		}



		/**

		 * @param $columns

		 *

		 * @return mixed

		 */

		function columns_sortable( $columns ) {

			$columns[LP()->quiz_post_type] = 'quiz-name';

			return $columns;

		}



		static function admin_styles() {

		}



		static function admin_params() {



		}



		function save() {

			$this->save_post();

		}



		private function _is_archive() {

			global $pagenow, $post_type;

			if ( !is_admin() || ( $pagenow != 'edit.php' ) || ( LP()->question_post_type != $post_type ) ) {

				return false;

			}

			return true;

		}



		private function _filter_quiz() {

			return !empty( $_REQUEST['filter_quiz'] ) ? absint( $_REQUEST['filter_quiz'] ) : false;

		}



		private function _get_orderby() {

			return isset( $_REQUEST['orderby'] ) ? $_REQUEST['orderby'] : '';

		}

	} // end LP_Question_Post_Type

}



new LP_Question_Post_Type();