<?php
namespace IMAddons\Admin;
class Nav_Menu_Walker extends \Walker_Nav_Menu {

    private $current_Item;

    function start_lvl( &$output, $depth = 0, $args = array() ) {
        $indent = str_repeat("\t", $depth);
        if( $args->has_children ){
            $output .= "\n$indent<ul role=\"menu\" class=\"sub-menu \">\n";
        }
    }

    function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {

        $indent = ( $depth ) ? str_repeat( "\t", $depth ) : '';
        $this->current_Item = $item;

        if (strcasecmp($item->attr_title, 'divider') == 0 && $depth === 1) {
            $output .= $indent . '<li role="presentation" class="divider">';
        } else if (strcasecmp($item->attr_title, 'dropdown-header') == 0 && $depth === 1) {
            $output .= $indent . '<li role="presentation" class="dropdown-header">' . esc_attr( $item->title );
        } else if (strcasecmp($item->attr_title, 'disabled') == 0) {
            $output .= $indent . '<li role="presentation" class="disabled"><a href="#">' . esc_attr( $item->title ) . '</a>';
        } else {

            $class_names = $value = '';

            $classes = empty( $item->classes ) ? array() : (array) $item->classes;
            $classes[] = 'menu-item-' . $item->ID;

            $class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args ) );

            if($args->has_children  && $depth>0 ) $class_names .= ' dropdown ';

            if(in_array('current-menu-parent', $classes)) { $class_names .= ' active'; }
            if(in_array('current_page_parent', $classes)) { $class_names .= ' active'; }
            if(in_array('current-menu-item', $classes)) { $class_names .= ' active'; }

            $class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

            $id = apply_filters( 'nav_menu_item_id', 'menu-item-'. $item->ID, $item, $args );
            $id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

            $output .= $indent . '<li' . $id . $value . $class_names .'>';


            $atts = array();
            $atts['title']  = ! empty( $item->title )   ? $item->title  : '';
            $atts['target'] = ! empty( $item->target )  ? $item->target : '';
            $atts['rel']    = ! empty( $item->xfn )     ? $item->xfn    : '';
            $atts['href']   = ! empty( $item->url )     ? $item->url    : '';

            $atts = apply_filters( 'nav_menu_link_attributes', $atts, $item, $args, $depth );

            $attributes = '';
            foreach ( $atts as $attr => $value ) {
                if ( ! empty( $value ) ) {
                    $value = ( 'href' === $attr ) ? esc_url( $value ) : esc_attr( $value );
                    $attributes .= ' ' . $attr . '="' . $value . '"';
                }
            }

            $item_output = $args->before;
            

            $item_output .= '<a'. $attributes .'>';

            $item_output .= $args->link_before . apply_filters( 'the_title', $item->title, $item->ID ) . $args->link_after;


            $item_output .=  '</a>';
            
            $item_output .= $args->after;


            $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );
        }
    }

    function display_element( $element, &$children_elements, $max_depth, $depth, $args, &$output ) {
        if ( !$element ) {
            return;
        }
        $id_field = $this->db_fields['id'];
        if ( is_object( $args[0] ) ) {
            $args[0]->has_children = ! empty( $children_elements[$element->$id_field] );
        }
        parent::display_element($element, $children_elements, $max_depth, $depth, $args, $output);
    }
}