<?php

/**

 * Widget API: WP_Widget_RSS class

 *

 * @package WordPress

 * @subpackage Widgets

 * @since 4.4.0

 */

/**

 * Core class used to implement a RSS widget.

 *

 * @since 2.8.0

 *

 * @see WP_Widget

 */

class WP_Widget_RSS extends WP_Widget {

	/**

	 * Sets up a new RSS widget instance.

	 *

	 * @since 2.8.0

	 */

	public function __construct() {

		$widget_ops = array(

			'description' => __( 'Entries from any RSS or Atom feed.' ),

			'customize_selective_refresh' => true,

		);

		$control_ops = array( 'width' => 400, 'height' => 200 );

		parent::__construct( 'rss', __( 'RSS' ), $widget_ops, $control_ops );

	}

	/**

	 * Outputs the content for the current RSS widget instance.

	 *

	 * @since 2.8.0

	 *

	 * @param array $args     Display arguments including 'before_title', 'after_title',

	 *                        'before_widget', and 'after_widget'.

	 * @param array $instance Settings for the current RSS widget instance.

	 */

	public function widget( $args, $instance ) {

		if ( isset($instance['error']) && $instance['error'] )

			return;

		$url = ! empty( $instance['url'] ) ? $instance['url'] : '';

		while ( stristr($url, 'http') != $url )

			$url = substr($url, 1);

		if ( empty($url) )

			return;

		// self-url destruction sequence

		if ( in_array( untrailingslashit( $url ), array( site_url(), home_url() ) ) )

			return;

		$rss = fetch_feed($url);

		$title = $instance['title'];

		$desc = '';

		$link = '';

		if ( ! is_wp_error($rss) ) {

			$desc = esc_attr(strip_tags(@html_entity_decode($rss->get_description(), ENT_QUOTES, get_option('blog_charset'))));

			if ( empty($title) )

				$title = strip_tags( $rss->get_title() );

			$link = strip_tags( $rss->get_permalink() );

			while ( stristr($link, 'http') != $link )

				$link = substr($link, 1);

		}

		if ( empty( $title ) ) {

			$title = ! empty( $desc ) ? $desc : __( 'Unknown Feed' );

		}

		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */

		$title = apply_filters( 'widget_title', $title, $instance, $this->id_base );

		$url = strip_tags( $url );

		$icon = includes_url( 'images/rss.png' );

		if ( $title )

			$title = '<a class="rsswidget" href="' . esc_url( $url ) . '"><img class="rss-widget-icon" style="border:0" width="14" height="14" src="' . esc_url( $icon ) . '" alt="RSS" /></a> <a class="rsswidget" href="' . esc_url( $link ) . '">'. esc_html( $title ) . '</a>';

		echo $args['before_widget'];

		if ( $title ) {

			echo $args['before_title'] . $title . $args['after_title'];

		}

		wp_widget_rss_output( $rss, $instance );

		echo $args['after_widget'];

		if ( ! is_wp_error($rss) )

			$rss->__destruct();

		unset($rss);

	}

	/**

	 * Handles updating settings for the current RSS widget instance.

	 *

	 * @since 2.8.0

	 *

	 * @param array $new_instance New settings for this instance as input by the user via

	 *                            WP_Widget::form().

	 * @param array $old_instance Old settings for this instance.

	 * @return array Updated settings to save.

	 */

	public function update( $new_instance, $old_instance ) {

		$testurl = ( isset( $new_instance['url'] ) && ( !isset( $old_instance['url'] ) || ( $new_instance['url'] != $old_instance['url'] ) ) );

		return wp_widget_rss_process( $new_instance, $testurl );

	}

	/**

	 * Outputs the settings form for the RSS widget.

	 *

	 * @since 2.8.0

	 *

	 * @param array $instance Current settings.

	 */

	public function form( $instance ) {

		if ( empty( $instance ) ) {

			$instance = array( 'title' => '', 'url' => '', 'items' => 10, 'error' => false, 'show_summary' => 0, 'show_author' => 0, 'show_date' => 0 );

		}

		$instance['number'] = $this->number;

		wp_widget_rss_form( $instance );

	}

}