woocommerce/includes/widgets/class-wc-widget-layered-nav-filters.php

<?php

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * Layered Navigation Filters Widget.
 *
 * @author   WooThemes
 * @category Widgets
 * @package  WooCommerce/Widgets
 * @version  2.3.0
 * @extends  WC_Widget
 */
class WC_Widget_Layered_Nav_Filters extends WC_Widget {

	/**
	 * Constructor.
	 */
	public function __construct() {
		$this->widget_cssclass    = 'woocommerce widget_layered_nav_filters';
		$this->widget_description = __( 'Display a list of active product filters.', 'woocommerce' );
		$this->widget_id          = 'woocommerce_layered_nav_filters';
		$this->widget_name        = __( 'Active Product Filters', 'woocommerce' );
		$this->settings           = array(
			'title'  => array(
				'type'  => 'text',
				'std'   => __( 'Active filters', 'woocommerce' ),
				'label' => __( 'Title', 'woocommerce' ),
			),
		);

		parent::__construct();
	}

	/**
	 * Get current page URL for layered nav items.
	 *
	 * @return string
	 */
	protected function get_page_base_url() {
		if ( defined( 'SHOP_IS_ON_FRONT' ) ) {
			$link = home_url();
		} elseif ( is_post_type_archive( 'product' ) || is_page( wc_get_page_id( 'shop' ) ) ) {
			$link = get_post_type_archive_link( 'product' );
		} elseif ( is_product_category() ) {
			$link = get_term_link( get_query_var( 'product_cat' ), 'product_cat' );
		} elseif ( is_product_tag() ) {
			$link = get_term_link( get_query_var( 'product_tag' ), 'product_tag' );
		} else {
			$queried_object = get_queried_object();
			$link = get_term_link( $queried_object->slug, $queried_object->taxonomy );
		}

		// Min/Max
		if ( isset( $_GET['min_price'] ) ) {
			$link = add_query_arg( 'min_price', wc_clean( $_GET['min_price'] ), $link );
		}

		if ( isset( $_GET['max_price'] ) ) {
			$link = add_query_arg( 'max_price', wc_clean( $_GET['max_price'] ), $link );
		}

		// Order by
		if ( isset( $_GET['orderby'] ) ) {
			$link = add_query_arg( 'orderby', wc_clean( $_GET['orderby'] ), $link );
		}

		/**
		 * Search Arg.
		 * To support quote characters, first they are decoded from &quot; entities, then URL encoded.
		 */
		if ( get_search_query() ) {
			$link = add_query_arg( 's', rawurlencode( htmlspecialchars_decode( get_search_query( false ) ) ), $link );
		}

		// Post Type Arg
		if ( isset( $_GET['post_type'] ) ) {
			$link = add_query_arg( 'post_type', wc_clean( $_GET['post_type'] ), $link );
		}

		// Min Rating Arg
		if ( isset( $_GET['rating_filter'] ) ) {
			$link = add_query_arg( 'rating_filter', wc_clean( $_GET['rating_filter'] ), $link );
		}

		// All current filters
		if ( $_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes() ) {
			foreach ( $_chosen_attributes as $name => $data ) {
				$filter_name = sanitize_title( str_replace( 'pa_', '', $name ) );
				if ( ! empty( $data['terms'] ) ) {
					$link = add_query_arg( 'filter_' . $filter_name, implode( ',', $data['terms'] ), $link );
				}
				if ( 'or' == $data['query_type'] ) {
					$link = add_query_arg( 'query_type_' . $filter_name, 'or', $link );
				}
			}
		}

		return $link;
	}

	/**
	 * Output widget.
	 *
	 * @see WP_Widget
	 * @param array $args
	 * @param array $instance
	 */
	public function widget( $args, $instance ) {
		if ( ! is_post_type_archive( 'product' ) && ! is_tax( get_object_taxonomies( 'product' ) ) ) {
			return;
		}

		$_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes();
		$min_price          = isset( $_GET['min_price'] ) ? wc_clean( $_GET['min_price'] ) : 0;
		$max_price          = isset( $_GET['max_price'] ) ? wc_clean( $_GET['max_price'] ) : 0;
		$rating_filter      = isset( $_GET['rating_filter'] ) ? array_filter( array_map( 'absint', explode( ',', $_GET['rating_filter'] ) ) ) : array();
		$base_link          = $this->get_page_base_url();

		if ( 0 < count( $_chosen_attributes ) || 0 < $min_price || 0 < $max_price || ! empty( $rating_filter ) ) {

			$this->widget_start( $args, $instance );

			echo '<ul>';

			// Attributes
			if ( ! empty( $_chosen_attributes ) ) {
				foreach ( $_chosen_attributes as $taxonomy => $data ) {
					foreach ( $data['terms'] as $term_slug ) {
						if ( ! $term = get_term_by( 'slug', $term_slug, $taxonomy ) ) {
							continue;
						}

						$filter_name    = 'filter_' . sanitize_title( str_replace( 'pa_', '', $taxonomy ) );
						$current_filter = isset( $_GET[ $filter_name ] ) ? explode( ',', wc_clean( $_GET[ $filter_name ] ) ) : array();
						$current_filter = array_map( 'sanitize_title', $current_filter );
						$new_filter      = array_diff( $current_filter, array( $term_slug ) );

						$link = remove_query_arg( array( 'add-to-cart', $filter_name ), $base_link );

						if ( sizeof( $new_filter ) > 0 ) {
							$link = add_query_arg( $filter_name, implode( ',', $new_filter ), $link );
						}

						echo '<li class="chosen"><a rel="nofollow" aria-label="' . esc_attr__( 'Remove filter', 'woocommerce' ) . '" href="' . esc_url( $link ) . '">' . esc_html( $term->name ) . '</a></li>';
					}
				}
			}

			if ( $min_price ) {
				$link = remove_query_arg( 'min_price', $base_link );
				echo '<li class="chosen"><a rel="nofollow" aria-label="' . esc_attr__( 'Remove filter', 'woocommerce' ) . '" href="' . esc_url( $link ) . '">' . sprintf( __( 'Min %s', 'woocommerce' ), wc_price( $min_price ) ) . '</a></li>';
			}

			if ( $max_price ) {
				$link = remove_query_arg( 'max_price', $base_link );
				echo '<li class="chosen"><a rel="nofollow" aria-label="' . esc_attr__( 'Remove filter', 'woocommerce' ) . '" href="' . esc_url( $link ) . '">' . sprintf( __( 'Max %s', 'woocommerce' ), wc_price( $max_price ) ) . '</a></li>';
			}

			if ( ! empty( $rating_filter ) ) {
				foreach ( $rating_filter as $rating ) {
					$link_ratings = implode( ',', array_diff( $rating_filter, array( $rating ) ) );
					$link         = $link_ratings ? add_query_arg( 'rating_filter', $link_ratings ) : remove_query_arg( 'rating_filter', $base_link );
					echo '<li class="chosen"><a rel="nofollow" aria-label="' . esc_attr__( 'Remove filter', 'woocommerce' ) . '" href="' . esc_url( $link ) . '">' . sprintf( esc_html__( 'Rated %s out of 5', 'woocommerce' ), esc_html( $rating ) ) . '</a></li>';
				}
			}

			echo '</ul>';

			$this->widget_end( $args );
		}
	}
}