woothemes/woocommerce

<?php
/**
 * Layered Navigation Filters Widget.
 *
 * @package WooCommerce\Widgets
 * @version 2.3.0
 */

defined( 'ABSPATH' ) || exit;

/**
 * Widget layered nav filters.
 */
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();
    }

    /**
     * Output widget.
     *
     * @see WP_Widget
     * @param array $args     Arguments.
     * @param array $instance Widget instance.
     */
    public function widget( $args, $instance ) {
        if ( ! is_shop() && ! is_product_taxonomy() ) {
            return;
        }

        $_chosen_attributes = WC_Query::get_layered_nav_chosen_attributes();
        $min_price          = isset( $_GET['min_price'] ) ? wc_clean( wp_unslash( $_GET['min_price'] ) ) : 0; // WPCS: input var ok, CSRF ok.
        $max_price          = isset( $_GET['max_price'] ) ? wc_clean( wp_unslash( $_GET['max_price'] ) ) : 0; // WPCS: input var ok, CSRF ok.
        $rating_filter      = isset( $_GET['rating_filter'] ) ? array_filter( array_map( 'absint', explode( ',', wp_unslash( $_GET['rating_filter'] ) ) ) ) : array(); // WPCS: sanitization ok, input var ok, CSRF ok.
        $base_link          = $this->get_current_page_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 ) {
                        $term = get_term_by( 'slug', $term_slug, $taxonomy );
                        if ( ! $term ) {
                            continue;
                        }

                        $filter_name    = 'filter_' . wc_attribute_taxonomy_slug( $taxonomy );
                        $current_filter = isset( $_GET[ $filter_name ] ) ? explode( ',', wc_clean( wp_unslash( $_GET[ $filter_name ] ) ) ) : array(); // WPCS: input var ok, CSRF ok.
                        $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 ( count( $new_filter ) > 0 ) {
                            $link = add_query_arg( $filter_name, implode( ',', $new_filter ), $link );
                        }

                        $filter_classes = array( 'chosen', 'chosen-' . sanitize_html_class( str_replace( 'pa_', '', $taxonomy ) ), 'chosen-' . sanitize_html_class( str_replace( 'pa_', '', $taxonomy ) . '-' . $term_slug ) );

                        echo '<li class="' . esc_attr( implode( ' ', $filter_classes ) ) . '"><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 );
                /* translators: %s: minimum price */
                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>'; // WPCS: XSS ok.
            }

            if ( $max_price ) {
                $link = remove_query_arg( 'max_price', $base_link );
                /* translators: %s: maximum price */
                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>'; // WPCS: XSS ok.
            }

            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 );

                    /* translators: %s: rating */
                    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 );
        }
    }
}