<?php
class Widget_Recent_Comments extends WP_Widget
{
  /**
   * Widget_Recent_Comments with  pre_get_posts filter.
   *
   * @see WP_Widget::__construct()
   */
  function __construct()
  {
    unregister_widget('WP_Widget_Recent_Posts');
    $widget_ops = array(
      'classname'                   => 'widget_recent_comments',
      'description'                 => __('Your site&#8217;s most recent comments.') . ' filtrés',
      'classname'                   => 'widget_recent_comments',
      'customize_selective_refresh' => true,
    );
    parent::__construct(false, __('Recent Comments') . ' filtrés', $widget_ops);
    $this->alt_option_name = 'widget_recent_comments';
  }

  public function recent_comments_style()
  {
    if (
      !current_theme_supports('widgets')  || !apply_filters('show_recent_comments_widget_style', true, $this->id_base)
    ) {
      return;
    }
    $type_attr = current_theme_supports('html5', 'style') ? '' : ' type="text/css"';
    printf(
      '<style%s>.recentcomments a{display:inline !important;padding:0 !important;margin:0 !important;}</style>',
      $type_attr
    );
  }


  /**
   * The widget's HTML output.
   */
  function widget($args, $instance)
  {
    static $first_instance = true;
    if (!isset($args['widget_id'])) {
      $args['widget_id'] = $this->id;
    }

    $output = '';
    $title = (!empty($instance['title'])) ? $instance['title'] : __('Recent Comments');
    /** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
    $title = apply_filters('widget_title', $title, $instance, $this->id_base);

    $number = (!empty($instance['number'])) ? absint($instance['number']) : 5;
    if (!$number) {
      $number = 5;
    }

    /* checkbox  $instance['filter'] */
    $filter = (!empty($instance['filter'])) ? true : false;

    if($filter === true) {
      $URR = new UserRoleRestrict;


      /**
       * array of roles
       * $posts_filter = ['public', 'subscriber', ... , 'administrator'];
       *
       */
      $posts_filter = $URR->get_filter($URR->my_capabilities());


      $comments = get_comments(
        apply_filters(
          'widget_comments_args',
          array(
            'number'      => $number,
            'status'      => 'approve',
            'post_status' => 'publish',
            'meta_query'  => array(
              'meta_key'     => 'target',
              'meta_value'   => $posts_filter,
            ),
          ),
          $instance
        )
      );
    }
    else {
      $comments = get_comments(
        /**
         * Filters the arguments for the Recent Comments widget.
         *
         * @since 3.4.0
         * @since 4.9.0 Added the `$instance` parameter.
         *
         * @see WP_Comment_Query::query() for information on accepted arguments.
         *
         * @param array $comment_args An array of arguments used to retrieve the recent comments.
         * @param array $instance     Array of settings for the current widget.
         */
        apply_filters(
          'widget_comments_args',
          array(
            'number'      => $number,
            'status'      => 'approve',
            'post_status' => 'publish',
          ),
          $instance
        )
      );
    }
    $output .= $args['before_widget'];
    if ($title) {
      $output .= $args['before_title'] . $title . $args['after_title'];
    }

    $recent_comments_id = ($first_instance) ? 'recentcomments' : "recentcomments-{$this->number}";
    $first_instance     = false;

    $output .= '<ul id="' . esc_attr($recent_comments_id) . '">';
    if (is_array($comments) && $comments) {
      // Prime cache for associated posts. (Prime post term cache if we need it for permalinks.)
      $post_ids = array_unique(wp_list_pluck($comments, 'comment_post_ID'));
      _prime_post_caches($post_ids, strpos(get_option('permalink_structure'), '%category%'), false);

      foreach ((array) $comments as $comment) {
        $output .= '<li class="recentcomments">';
        $output .= sprintf(
          /* translators: Comments widget. 1: Comment author, 2: Post link. */
          _x('%1$s', 'widgets'),
          '<a href="' . esc_url(get_comment_link($comment)) . '">' . get_the_title($comment->comment_post_ID) . '</a>'
        );
        $output .= '</li>';
      }
    }
    $output .= '</ul>';
    $output .= $args['after_widget'];

    echo $output;
  }

  /**
   * The widget update handler.
   *
   * @see WP_Widget::update()
   *
   * @param array $new_instance The new instance of the widget.
   * @param array $old_instance The old instance of the widget.
   * @return array The updated instance of the widget.
   */
  function update($new_instance, $old_instance)
  {
    $instance           = $old_instance;
    $instance['title']  = sanitize_text_field($new_instance['title']);
    $instance['number'] = absint($new_instance['number']);
    $instance['filter'] = absint($new_instance['filter']);
    return $instance;
  }

  /**
   * Output the admin widget options form HTML.
   *
   * @param array $instance The current widget settings.
   * @return string The HTML markup for the form.
   */
  function form($instance)
  {
    $title  = isset($instance['title'])  ? $instance['title'] : '';
    $number = isset($instance['number']) ? absint($instance['number']) : 5;
    $filter = isset($instance['filter']) ? $instance['filter'] : false;

    ?>
    <p><label for="<?php echo $this->get_field_id('title'); ?>"><?php _e('Title:'); ?></label>
      <input class="widefat" id="<?php echo $this->get_field_id('title'); ?>" name="<?php echo $this->get_field_name('title'); ?>" type="text" value="<?php echo esc_attr($title); ?>" /></p>

    <p><label for="<?php echo $this->get_field_id('number'); ?>"><?php _e('Number of comments to show:'); ?></label>
      <input class="tiny-text" id="<?php echo $this->get_field_id('number'); ?>" name="<?php echo $this->get_field_name('number'); ?>" type="number" step="1" min="1" value="<?php echo $number; ?>" size="3" /></p>

    <p><input <?php checked($filter, true)?> class="checkbox" type="checkbox" id="<?php echo $this->get_field_name('filter'); ?>" name="<?php echo $this->get_field_name('filter'); ?>" value="1">
      <label for="<?php echo $this->get_field_id('filter'); ?>"><?php _e('Filter'); ?></label></p>

    <?php
  }

  public function flush_widget_cache()
  {
    _deprecated_function(__METHOD__, '4.4.0');
  }
} // end of Class

/**
 * Register the new widget.
 *
 * @see 'widgets_init'
 */
add_action('widgets_init', 'Widget_Recent_Comments');
function Widget_Recent_Comments()
{
  register_widget('Widget_Recent_Comments');
}