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<?php

class WP_Nav_Menu_Widget extends WP_Widget
{
    public function __construct()
    {
        $widget_ops = array('description' => __('Add a navigation menu to your sidebar.'), 'customize_selective_refresh' => true);
        parent::__construct('nav_menu', __('Navigation Menu'), $widget_ops);
    }
    public function widget($args, $instance)
    {
        $nav_menu = !empty($instance['nav_menu']) ? wp_get_nav_menu_object($instance['nav_menu']) : false;
        if (!$nav_menu) {
            return;
        }
        $default_title = __('Menu');
        $title = !empty($instance['title']) ? $instance['title'] : '';
        $title = apply_filters('widget_title', $title, $instance, $this->id_base);
        echo $args['before_widget'];
        if ($title) {
            echo $args['before_title'] . $title . $args['after_title'];
        }
        $format = current_theme_supports('html5', 'navigation-widgets') ? 'html5' : 'xhtml';
        $format = apply_filters('navigation_widgets_format', $format);
        if ('html5' === $format) {
            $title = trim(strip_tags($title));
            $aria_label = $title ? $title : $default_title;
            $nav_menu_args = array('fallback_cb' => '', 'menu' => $nav_menu, 'container' => 'nav', 'container_aria_label' => $aria_label, 'items_wrap' => '<ul id="%1$s" class="%2$s">%3$s</ul>');
        } else {
            $nav_menu_args = array('fallback_cb' => '', 'menu' => $nav_menu);
        }
        wp_nav_menu(apply_filters('widget_nav_menu_args', $nav_menu_args, $nav_menu, $args, $instance));
        echo $args['after_widget'];
    }
    public function update($new_instance, $old_instance)
    {
        $instance = array();
        if (!empty($new_instance['title'])) {
            $instance['title'] = sanitize_text_field($new_instance['title']);
        }
        if (!empty($new_instance['nav_menu'])) {
            $instance['nav_menu'] = (int) $new_instance['nav_menu'];
        }
        return $instance;
    }
    public function form($instance)
    {
        global $wp_customize;
        $title = isset($instance['title']) ? $instance['title'] : '';
        $nav_menu = isset($instance['nav_menu']) ? $instance['nav_menu'] : '';
        $menus = wp_get_nav_menus();
        $empty_menus_style = '';
        $not_empty_menus_style = '';
        if (empty($menus)) {
            $empty_menus_style = ' style="display:none" ';
        } else {
            $not_empty_menus_style = ' style="display:none" ';
        }
        $nav_menu_style = '';
        if (!$nav_menu) {
            $nav_menu_style = 'display: none;';
        }
        ?>
		<p class="nav-menu-widget-no-menus-message" <?php 
        echo $not_empty_menus_style;
        ?>>
			<?php 
        if ($wp_customize instanceof WP_Customize_Manager) {
            $url = 'javascript: wp.customize.panel( "nav_menus" ).focus();';
        } else {
            $url = admin_url('nav-menus.php');
        }
        printf(__('No menus have been created yet. <a href="%s">Create some</a>.'), esc_attr($url));
        ?>
		</p>
		<div class="nav-menu-widget-form-controls" <?php 
        echo $empty_menus_style;
        ?>>
			<p>
				<label for="<?php 
        echo $this->get_field_id('title');
        ?>"><?php 
        _e('Title:');
        ?></label>
				<input type="text" class="widefat" id="<?php 
        echo $this->get_field_id('title');
        ?>" name="<?php 
        echo $this->get_field_name('title');
        ?>" value="<?php 
        echo esc_attr($title);
        ?>"/>
			</p>
			<p>
				<label for="<?php 
        echo $this->get_field_id('nav_menu');
        ?>"><?php 
        _e('Select Menu:');
        ?></label>
				<select id="<?php 
        echo $this->get_field_id('nav_menu');
        ?>" name="<?php 
        echo $this->get_field_name('nav_menu');
        ?>">
					<option value="0"><?php 
        _e('&mdash; Select &mdash;');
        ?></option>
					<?php 
        foreach ($menus as $menu) {
            ?>
						<option value="<?php 
            echo esc_attr($menu->term_id);
            ?>" <?php 
            selected($nav_menu, $menu->term_id);
            ?>>
							<?php 
            echo esc_html($menu->name);
            ?>
						</option>
					<?php 
        }
        ?>
				</select>
			</p>
			<?php 
        if ($wp_customize instanceof WP_Customize_Manager) {
            ?>
				<p class="edit-selected-nav-menu" style="<?php 
            echo $nav_menu_style;
            ?>">
					<button type="button" class="button"><?php 
            _e('Edit Menu');
            ?></button>
				</p>
			<?php 
        }
        ?>
		</div>
		<?php 
    }
}