<?php
/**
 * Nav Menu API: Walker_Nav_Menu class
 *
 * @package WordPress
 * @subpackage Nav_Menus
 * @since 4.6.0
 */

	/**
	 * Custom Walker Nav Menu for Mobile
	 *
	 *
	 * @see Walker
	 */
	class madara_Walker_Mobile_Menu extends Walker_Nav_Menu {
		/**
		 * What the class handles.
		 *
		 * @since 3.0.0
		 * @access public
		 * @var string
		 *
		 * @see Walker::$tree_type
		 */
		public $tree_type = array( 'post_type', 'taxonomy', 'custom' );

		/**
		 * Database fields to use.
		 *
		 * @since 3.0.0
		 * @access public
		 * @todo Decouple this.
		 * @var array
		 *
		 * @see Walker::$db_fields
		 */
		public $db_fields = array( 'parent' => 'menu_item_parent', 'id' => 'db_id' );

		/**
		 * Starts the list before the elements are added.
		 *
		 * @since 3.0.0
		 *
		 * @see Walker::start_lvl()
		 *
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param int $depth Depth of menu item. Used for padding.
		 * @param stdClass $args An object of wp_nav_menu() arguments.
		 */
		public function start_lvl( &$output, $depth = 0, $args = array() ) {
			if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
				$t = '';
				$n = '';
			} else {
				$t = "\t";
				$n = "\n";
			}
			$indent = str_repeat( $t, $depth );
			
			// Default class.
			$classes = array( 'sub-menu', 'panel-collapse', 'collapse', 'sub-menu' );

			/**
			 * Filters the CSS class(es) applied to a menu list element.
			 *
			 * @since 4.8.0
			 *
			 * @param string[] $classes Array of the CSS classes that are applied to the menu `<ul>` element.
			 * @param stdClass $args    An object of `wp_nav_menu()` arguments.
			 * @param int      $depth   Depth of menu item. Used for padding.
			 */
			$class_names = join( ' ', apply_filters( 'nav_menu_submenu_css_class', $classes, $args, $depth ) );
			$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

			$output .= "{$n}{$indent}<ul id=\"sub-menu-id-{$this->curItem->ID}\" $class_names>{$n}";
		}

		/**
		 * Ends the list of after the elements are added.
		 *
		 * @since 3.0.0
		 *
		 * @see Walker::end_lvl()
		 *
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param int $depth Depth of menu item. Used for padding.
		 * @param stdClass $args An object of wp_nav_menu() arguments.
		 */
		public function end_lvl( &$output, $depth = 0, $args = array() ) {
			if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
				$t = '';
				$n = '';
			} else {
				$t = "\t";
				$n = "\n";
			}
			$indent = str_repeat( $t, $depth );
			$output .= "$indent</ul>{$n}";
		}

		/**
		 * Starts the element output.
		 *
		 * @since 3.0.0
		 * @since 4.4.0 The {@see 'nav_menu_item_args'} filter was added.
		 *
		 * @see Walker::start_el()
		 *
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param WP_Post $item Menu item data object.
		 * @param int $depth Depth of menu item. Used for padding.
		 * @param stdClass $args An object of wp_nav_menu() arguments.
		 * @param int $id Current item ID.
		 */
		public function start_el( &$output, $item, $depth = 0, $args = array(), $id = 0 ) {
			if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
				$t = '';
				$n = '';
			} else {
				$t = "\t";
				$n = "\n";
			}
			$indent = ( $depth ) ? str_repeat( $t, $depth ) : '';

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

			/**
			 * Filters the arguments for a single nav menu item.
			 *
			 * @since 4.4.0
			 *
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 * @param WP_Post $item Menu item data object.
			 * @param int $depth Depth of menu item. Used for padding.
			 */
			$args = apply_filters( 'nav_menu_item_args', $args, $item, $depth );

			/**
			 * Filters the CSS class(es) applied to a menu item's list item element.
			 *
			 * @since 3.0.0
			 * @since 4.1.0 The `$depth` parameter was added.
			 *
			 * @param array $classes The CSS classes that are applied to the menu item's `<li>` element.
			 * @param WP_Post $item The current menu item.
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 * @param int $depth Depth of menu item. Used for padding.
			 */
			$class_names = join( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $item, $args, $depth ) );
			$class_names = $class_names ? ' class="' . esc_attr( $class_names ) . '"' : '';

			/**
			 * Filters the ID applied to a menu item's list item element.
			 *
			 * @since 3.0.1
			 * @since 4.1.0 The `$depth` parameter was added.
			 *
			 * @param string $menu_id The ID that is applied to the menu item's `<li>` element.
			 * @param WP_Post $item The current menu item.
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 * @param int $depth Depth of menu item. Used for padding.
			 */
			$id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $item->ID, $item, $args, $depth );
			$id = $id ? ' id="' . esc_attr( $id ) . '"' : '';

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

			$atts           = array();
			$atts['title']  = ! empty( $item->attr_title ) ? $item->attr_title : '';
			$atts['target'] = ! empty( $item->target ) ? $item->target : '';
			if ( '_blank' === $item->target && empty( $item->xfn ) ) {
				$atts['rel'] = 'noopener noreferrer';
			} else {
				$atts['rel'] = $item->xfn;
			}
			$atts['href']   = ! empty( $item->url ) ? $item->url : '';
			$atts['aria-current'] = $item->current ? 'page' : '';

			/**
			 * Filters the HTML attributes applied to a menu item's anchor element.
			 *
			 * @since 3.6.0
			 * @since 4.1.0 The `$depth` parameter was added.
			 *
			 * @param array $atts {
			 *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
			 *
			 * @type string $title Title attribute.
			 * @type string $target Target attribute.
			 * @type string $rel The rel attribute.
			 * @type string $href The href attribute.
			 * }
			 *
			 * @param WP_Post $item The current menu item.
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 * @param int $depth Depth of menu item. Used for padding.
			 */
			$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 . '"';
				}
			}

			/** This filter is documented in wp-includes/post-template.php */
			$title = apply_filters( 'the_title', $item->title, $item->ID );

			/**
			 * Filters a menu item's title.
			 *
			 * @since 4.4.0
			 *
			 * @param string $title The menu item's title.
			 * @param WP_Post $item The current menu item.
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 * @param int $depth Depth of menu item. Used for padding.
			 */
			$title = apply_filters( 'nav_menu_item_title', $title, $item, $args, $depth );

			$item_output = '';
			if ( in_array( "menu-item-has-children", $classes ) ) {
				$item_output = '<div class="panel-heading">';
			}

			$item_output .= $args->before;
			$item_output .= '<a' . $attributes . ' class="menu-link">';
			$item_output .= $args->link_before . $title . $args->link_after;
			$item_output .= '</a>';
			$item_output .= $args->after;

			if ( in_array( "menu-item-has-children", $classes ) ) {
				$item_output .= '<a data-toggle="collapse" data-parent="#mobile-nav" href="#sub-menu-id-' . $item->ID . '">
									<i class="fa fa-plus" aria-hidden="true"></i>
								</a>
							</div>';
			}

			/**
			 * Filters a menu item's starting output.
			 *
			 * The menu item's starting output only includes `$args->before`, the opening `<a>`,
			 * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
			 * no filter for modifying the opening and closing `<li>` for a menu item.
			 *
			 * @since 3.0.0
			 *
			 * @param string $item_output The menu item's starting HTML output.
			 * @param WP_Post $item Menu item data object.
			 * @param int $depth Depth of menu item. Used for padding.
			 * @param stdClass $args An object of wp_nav_menu() arguments.
			 */
			$output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $item, $depth, $args );

			// store current item
			$this->curItem = $item;
		}

		/**
		 * Ends the element output, if needed.
		 *
		 * @since 3.0.0
		 *
		 * @see Walker::end_el()
		 *
		 * @param string $output Passed by reference. Used to append additional content.
		 * @param WP_Post $item Page data object. Not used.
		 * @param int $depth Depth of page. Not Used.
		 * @param stdClass $args An object of wp_nav_menu() arguments.
		 */
		public function end_el( &$output, $item, $depth = 0, $args = array() ) {
			if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
				$t = '';
				$n = '';
			} else {
				$t = "\t";
				$n = "\n";
			}
			$output .= "</li>{$n}";
		}

	} // Walker_Nav_Menu
