<?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,

			'show_instance_in_rest'       => 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 ( ! empty( $url ) && 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() ), true ) ) {

			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 ( ! empty( $link ) && 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 );

		if ( $title ) {

			$feed_link = '';

			$feed_url  = strip_tags( $url );

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

			$feed_link = sprintf(

				'<a class="rsswidget rss-widget-feed" href="%1$s"><img class="rss-widget-icon" style="border:0" width="14" height="14" src="%2$s" alt="%3$s"%4$s /></a> ',

				esc_url( $feed_url ),

				esc_url( $feed_icon ),

				esc_attr__( 'RSS' ),

				( wp_lazy_loading_enabled( 'img', 'rss_widget_feed_icon' ) ? ' loading="lazy"' : '' )

			);

			/**

			 * Filters the classic RSS widget's feed icon link.

			 *

			 *

			 * @since 5.9.0

			 *

			 */

			$feed_link = apply_filters( 'rss_widget_feed_link', $feed_link, $instance );

			$title = $feed_link . '<a class="rsswidget rss-widget-title" href="' . esc_url( $link ) . '">' . esc_html( $title ) . '</a>';

		}

		echo $args['before_widget'];

		if ( $title ) {

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

		}

		$format = current_theme_supports( 'html5', 'navigation-widgets' ) ? 'html5' : 'xhtml';

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

		$format = apply_filters( 'navigation_widgets_format', $format );

		if ( 'html5' === $format ) {

			// The title may be filtered: Strip out HTML and make sure the aria-label is never empty.

			$title      = trim( strip_tags( $title ) );

			$aria_label = $title ? $title : __( 'RSS Feed' );

			echo '<nav aria-label="' . esc_attr( $aria_label ) . '">';

		}

		wp_widget_rss_output( $rss, $instance );

		if ( 'html5' === $format ) {

			echo '</nav>';

		}

		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 );

	}

}