Provides a shortcode for custom product listing

wpmudev-mp-custom-listing.php

<?php
/*
Plugin Name: WPMUDEV MP - Custom Products List
Plugin URI: http://premium.wpmudev.org/
Description: Provides a shortcode for custom product listing
Version: 1.0.0
Author: Panos Lyrakis (WPMUDEV)
Author URI: http://premium.wpmudev.org
License: GNU General Public License (Version 2 - GPLv2)
*/

if( ! class_exists( 'WPMUDEV_MP_Custom_Products_List' ) ){
    class WPMUDEV_MP_Custom_Products_List{
        private static $_instance = null;

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

        private function __construct() {

            add_shortcode( 'wpmudev_products_list', array( $this, 'products_list_sh' ) );

        }

        public function products_list_sh( $atts, $content ){

            if( ! class_exists( 'MP_Product' ) ) return;

            $atts = shortcode_atts(
                    array(
                        'per_page'                  => '3',
                        'page'                      => 1,
                        'post_status'               => 'publish',
                        'category'                  => null,
                        'tag'                       => null,
                        'paginate'                  => null,
                        'order'                     => null,
                        'order_by'                   => null,
                        'echo'                      => true,
                        'nopaging'                  => true,
                        'show_options'              => false,
                        'exclude_downloadables'     => true,
                        'weight'                    => null
                    ), $atts, 'wpmudev_products_list' );
                
            $query = array(
                'post_type'   => MP_Product::get_post_type(),
                'post_status' => $atts['post_status'],

            );

            $tax_query = array();
            if ( ! is_null( $atts['category'] ) || ! is_null( $atts['tag'] ) ) {
                if ( ! is_null( $atts['category'] ) ) {
                    $tax_query[] = array(
                        'taxonomy' => 'product_category',
                        'field'    => 'slug',
                        'terms'    => sanitize_title( $atts['category'] ),
                    );
                }

                if ( ! is_null( $atts['tag'] ) ) {
                    $tax_query[] = array(
                        'taxonomy' => 'product_tag',
                        'field'    => 'slug',
                        'terms'    => sanitize_title( $atts['tag'] ),
                    );
                }
            }

            if ( count( $tax_query ) > 1 ) {
                $query['tax_query'] = array_merge( array( 'relation' => 'AND' ), $tax_query );
            } elseif ( count( $tax_query ) == 1 ) {
                $query['tax_query'] = $tax_query;
            }

            // Setup pagination
            if ( ( ! is_null( $atts['paginate'] ) && ! $atts['paginate'] ) || ( is_null( $atts['paginate'] ) && ! mp_get_setting( 'paginate' ) ) ) {
                $query['nopaging'] = $atts['nopaging'] = true;
            } else {
                // Figure out per page
                if ( ! is_null( $atts['per_page'] ) ) {
                    $query['posts_per_page'] = intval( $atts['per_page'] );
                } else {                    
                    $query['posts_per_page'] = intval( mp_get_setting( 'per_page' ) );
                }

                // Figure out page
                if ( ! is_null( $atts['page'] ) ) {
                    $query['paged'] = intval( $atts['page'] );
                } elseif ( get_query_var( 'paged' ) != '' ) {
                    $query['paged'] = $atts['page'] = intval( get_query_var( 'paged' ) );
                } elseif ( get_query_var( 'page' ) != '' ) {
                    $query['paged'] = $atts['page'] = intval( get_query_var( 'page' ) );
                }

            }

            if( !isset( $_SESSION ) ){
				$_SESSION = array();
			}

			$order_by = isset( $_SESSION['mp_product_list_order_by'] ) ? $_SESSION['mp_product_list_order_by'] : '';
			$order    = isset( $_SESSION['mp_product_list_order'] ) ? $_SESSION['mp_product_list_order'] : '';

			if ( ! empty( $order_by ) && ! empty( $order ) ) {
				$query['orderby'] = $order_by;
				$query['order']   = $order;

				$atts['order_by'] = $order_by;
				$atts['order']    = $order;
			}

            // Get order by
			if ( ! is_null( $atts['order_by'] ) ) {
				if ( 'price' == $atts['order_by'] ) {
					$query['meta_key'] = 'sort_price';
					$query['orderby']  = 'meta_value_num';
				} else if ( 'sales' == $atts['order_by'] ) {
					$query['meta_key'] = 'mp_sales_count';
					$query['orderby']  = 'meta_value_num';
				} else {
					$query['orderby'] = $atts['order_by'];
				}
			} elseif ( 'price' == mp_get_setting( 'order_by' ) ) {
				$query['meta_key'] = 'sort_price';
				$query['orderby']  = 'meta_value_num';
			} elseif ( 'sales' == mp_get_setting( 'order_by' ) ) {
				$query['meta_key'] = 'mp_sales_count';
				$query['orderby']  = 'meta_value_num';
			} else {
				$query['orderby'] = mp_get_setting( 'order_by' );
			}
		
            // Get order direction
            $query['order'] = mp_get_setting( 'order' );
            if ( ! is_null( $atts['order'] ) ) {
                $query['order'] = $atts['order'];
            }

            $meta_queries = array();
            //Get producs with specific weight           
            if( ! is_null( $atts['weight'] ) ){
                
                $meta_queries[]= array(
                        'key'     => 'weight_pounds',
                        'value'   => $atts['weight'],
                        'compare' => '<=',
                    );

            }

            if( $atts['exclude_downloadables'] ){
                $meta_queries[] = array(
                        'key'     => 'product_type',
                        'value'   => 'digital',
                        'compare' => '!=',
                    );
                
            }

            if( ! empty( $meta_queries ) ){

                $query['meta_query'] = array();

                foreach( $meta_queries as $meta_query ){
                    $query['meta_query'][] = $meta_query;
                }

            }           
            
            $custom_query = new WP_Query( $query );

            // Get layout type
            $layout_type = mp_get_setting( 'list_view' );
            if ( ! is_null( $atts['list_view'] ) ) {
                $layout_type = $atts['list_view'] ? 'list' : 'grid';
            }

            // Build content
            $content = '';

            if ( ! mp_doing_ajax() && $atts['show_options'] ) {
                $per_page = ( is_null( $atts['per_page'] ) ) ? null : $atts['per_page'];
                $content .= ( $atts['filters'] || ( is_null( $atts['filters'] ) && 1 != mp_get_setting( 'hide_products_filter' ) ) ) ? mp_products_filter( false, $per_page, $custom_query ) : '';
            }

            $content .= '<!-- MP Product List --><section id="mp-products" class="hfeed mp_products mp_products-' . $layout_type . '">';

            if ( $last = $custom_query->post_count ) {
                $content .= $layout_type == 'grid' ? _mp_products_html_grid( $custom_query ) : _mp_products_html_list( $custom_query );
            } else {
                $content .= '<div id="mp-products-empty">' . apply_filters( 'wpmudev_mp_product_list_none', __( 'No Products', 'mp' ) ) . '</div><!-- end mp-no-products -->';
            }

            $content .= '</section><!-- end mp-products -->';

            $content .= ( ! $atts['nopaging'] ) ? mp_products_nav( false, $custom_query ) : '';

            /**
            * Filter product list html
            *
            * @since 3.0
            *
            * @param string $content The current html content.
            * @param array $args The arguments passed to mp_list_products
            */
            $content = apply_filters( 'wpmudev_mp_list_products', $content, $atts );

            if ( $atts['echo'] ) {
                echo $content;
            } else {
                return $content;
            }

        }

    }
    add_action( 'plugins_loaded', function(){
		WPMUDEV_MP_Custom_Products_List::get_instance();
	} );
}

?>