lightspeeddevelopment/lsx-search

<?php
/**
 * LSX_Search_FacetWP_Hierarchy Frontend Main Class
 */

namespace lsx\search\classes\facetwp;

class Hierarchy {

    /**
     * Holds class instance
     *
     * @since 1.0.0
     *
     * @var      object \lsx\search\classes\facetwp\Hierarchy()
     */
    protected static $instance = null;

    /**
     * Constructor
     */
    public function __construct() {
        add_filter( 'facetwp_facet_html', array( $this, 'checkbox_facet_html' ), 100, 2 );
    }

    /**
     * Return an instance of this class.
     *
     * @since 1.0.0
     *
     * @return    object \lsx\search\classes\facetwp\Hierarchy()    A single instance of this class.
     */
    public static function get_instance() {
        // If the single instance hasn't been set, set it now.
        if ( null === self::$instance ) {
            self::$instance = new self();
        }
        return self::$instance;
    }

    public function checkbox_facet_html( $output, $params ) {
        if ( 'checkboxes' === $params['facet']['type'] && 'yes' === $params['facet']['hierarchical'] ) {
            $output = $this->render_hierarchy( $params );
        }
        return $output;
    }

    /**
     * Generate the facet HTML (hierarchical taxonomies)
     */
    function render_hierarchy( $params ) {

        $output = '';
        $facet = $params['facet'];
        $selected_values = (array) $params['selected_values'];
        $values = FWP()->helper->sort_taxonomy_values( $params['values'], $facet['orderby'] );

        $init_depth = -1;
        $last_depth = -1;

        foreach ( $values as $result ) {
            $depth = (int) $result['depth'];

            /*if ( -1 == $last_depth ) {
                $init_depth = $depth;
            }
            elseif ( $depth > $last_depth ) {
                $output .= '<div class="facetwp-depth">';
            }
            elseif ( $depth < $last_depth ) {
                for ( $i = $last_depth; $i > $depth; $i-- ) {
                    $output .= '</div>';
                }
            }*/

            $selected = in_array( $result['facet_value'], $selected_values ) ? ' checked' : '';
            $selected .= ( 0 == $result['counter'] && '' == $selected ) ? ' disabled' : '';

            $is_child = ( 0 == $result['parent_id'] && '0' == $result['parent_id'] ) ? ' is-child' : '';
            $depth_css = ' depth-' . $result['depth'];

            $output .= '<div class="facetwp-checkbox' . $selected . $is_child . $depth_css . '" data-parent-id="' . esc_attr( $result['parent_id'] ) . '" data-value="' . esc_attr( $result['facet_value'] ) . '">';
            $output .= esc_html( $result['facet_display_value'] ) . ' <span class="facetwp-counter">(' . $result['counter'] . ')</span>';
            $output .= '</div>';

            $last_depth = $depth;
        }

        for ( $i = $last_depth; $i > $init_depth; $i-- ) {
            $output .= '</div>';
        }

        return $output;
    }
}