simple-product-options-admin.php

<?php

class wpec_simple_product_options_walker extends Walker {

    var $tree_type = 'category';

    // Not sure what this is for. It was in the WordPress Walker_Category_Checklist class
    // with a note saying "TODO: decouple this", so I have left it in.
    var $db_fields = array( 'parent' => 'parent', 'id' => 'term_id' );

    // Don't need to output anything - if this was a nest list it would be a <ul>
    // It's here purely to override the default output with nothing.
    function start_lvl( &$output, $depth = 0, $args = array() ) {
    }

    // Same as above for the closing tag.
    function end_lvl( &$output, $depth = 0, $args = array() ) {
    }

    // Start variation set or variation
    function start_el( &$output, $category, $depth = 0, $args = array(), $current_object_id = 0 ) {

        // Only show product option sets, and their immediate children:
        if ( $depth > 1 )
            return;

        extract( $args );

        if ( empty( $taxonomy ) )
            $taxonomy = 'wpsc-variation';

        if ( $depth == 0 ) {

            // Start variation set
            $output .= '<div class="product_option_set">';
            $output .= '<label class="set_label">
                        <input class="wpec-spo-option-set-checkbox" type="checkbox"' . checked( in_array( $category->term_id, $selected_cats ), true, false ) .'name="tax_input['.esc_attr($taxonomy).'][]" value="' . esc_attr($category->term_id) . '">' . esc_html( apply_filters( 'the_category', $category->name ) ) . '
                        </label>';

        } else {

            // Start variation
            $output .= '<div class="product_option" style="margin-left: 1em;">
                        <label>
                        <input class="wpec-spo-option" type="checkbox"' . checked( in_array( $category->term_id, $selected_cats ), true, false ) . 'name="tax_input['.esc_attr($taxonomy).'][]" value="'.esc_attr($category->term_id).'">' . esc_html( apply_filters( 'the_category', $category->name ) ) . '
                        </label>';

        }

    }

    // End variation set or variation
    function end_el( &$output, $category, $depth = 0, $args = array() ) {

        if ( $depth > 1 )
            return;

        $output .= '</div>';
    }

}



class wpec_simple_product_options_admin {



    function __construct() {
        add_action ( 'admin_init', array ( &$this, 'admin_init' ),11 );
    }



    function admin_init() {

        // Remove standard WP meta box for the taxonomy, and add our own
        remove_meta_box ( 'wpec_product_optiondiv', 'wpsc-product', 'side' ) ;

        if ( get_terms ( 'wpec_product_option', array ( 'fields' => 'count', 'hide_empty' => false ) ) ) {
            add_meta_box ( 'wpec-spo-product-options', __('Product Options', 'wpec_spo'), array(&$this, 'meta_box'), 'wpsc-product', 'normal', 'default' ) ;
            add_filter ( 'taxonomy_dropdown_args', array ( &$this, 'limit_taxonomy_parent_choices' ), 10, 2 );
            add_action ( 'wpec_product_option_pre_add_form', array ( &$this, 'show_taxonomy_hierarchy_warning' ) );
            wp_enqueue_script( 'simple-product-options', plugin_dir_url( __FILE__ ).'js/simple-product-options.js', array());
        }

    }



    function show_taxonomy_hierarchy_warning () {
        echo '<div class="error" class="updated">You should create &quot;<strong>Parent</strong>&quot; elements for each option type you want, and then &quot;<strong>child</strong>&quot; elements for each individual choice for that option. <strong>Do not</strong> create children of children as they won\'t show up</div>';
    }



    function limit_taxonomy_parent_choices ( $args, $taxonomy ) {

        if ( $taxonomy != 'wpec_product_option' )
            return $args;

        $args['depth'] = 1 ;

        return $args;
    }



    function meta_box() {

        global $post;

        // Get variation data from WP Terms
        $product_term_data = wp_get_object_terms( $post->ID, 'wpec_product_option' );

        if ( !empty( $product_term_data ) ) {

            foreach ( $product_term_data as $product_term )

                $product_terms[] = $product_term->term_id;

        } else {

            $product_terms = array();

        }

        ?> <ul id="wpec_product_optionchecklist" class="list:wpec_product_option categorychecklist form-no-clear"><input type='hidden' name='tax_input[wpec_product_option][]' value='0' /><?php
        wp_terms_checklist ( $post->ID, array (
                                               'taxonomy' => 'wpec_product_option',
                                               'selected_cats' => $product_terms,
                                               'walker' => new wpec_simple_product_options_walker,
                                               'checked_ontop' => false
                                               )
        );
        ?></ul> <?php

    }


}

$wpec_simple_product_options_admin = new wpec_simple_product_options_admin();