<?php

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/**

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* Widget API: WP_Widget_RSS class

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*

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* @package WordPress

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* @subpackage Widgets

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* @since 4.4.0

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*/

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/**

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* Core class used to implement a RSS widget.

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*

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* @since 2.8.0

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*

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* @see WP_Widget

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*/

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class WP_Widget_RSS extends WP_Widget {

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/**

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* Sets up a new RSS widget instance.

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*

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* @since 2.8.0

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*/

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public function __construct() {

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$widget_ops = array(

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

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'customize_selective_refresh' => true,

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'show_instance_in_rest' => true,

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);

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$control_ops = array(

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'width' => 400,

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'height' => 200,

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);

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

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}

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/**

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* Outputs the content for the current RSS widget instance.

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*

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* @since 2.8.0

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*

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

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* 'before_widget', and 'after_widget'.

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

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*/

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public function widget( $args, $instance ) {

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

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return;

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}

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

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while ( ! empty( $url ) && stristr( $url, 'http' ) !== $url ) {

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$url = substr( $url, 1 );

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}

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if ( empty( $url ) ) {

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return;

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}

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// Self-URL destruction sequence.

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

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return;

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}

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$rss = fetch_feed( $url );

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$title = $instance['title'];

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$desc = '';

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$link = '';

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if ( ! is_wp_error( $rss ) ) {

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

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if ( empty( $title ) ) {

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

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}

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

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while ( ! empty( $link ) && stristr( $link, 'http' ) !== $link ) {

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$link = substr( $link, 1 );

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}

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}

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if ( empty( $title ) ) {

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

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}

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

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

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if ( $title ) {

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$feed_link = '';

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$feed_url = strip_tags( $url );

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

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$feed_link = sprintf(

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'<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> ',

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esc_url( $feed_url ),

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esc_url( $feed_icon ),

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esc_attr__( 'RSS' ),

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

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);

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/**

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

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*

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* Themes can remove the icon link by using `add_filter( 'rss_widget_feed_link', '__return_empty_string' );`.

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*

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* @since 5.9.0

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*

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* @param string|false $feed_link HTML for link to RSS feed.

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* @param array $instance Array of settings for the current widget.

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*/

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

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

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}

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echo $args['before_widget'];

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if ( $title ) {

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

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}

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

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

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

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

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

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

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

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

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}

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wp_widget_rss_output( $rss, $instance );

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

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echo '</nav>';

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}

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echo $args['after_widget'];

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if ( ! is_wp_error( $rss ) ) {

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$rss->__destruct();

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}

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unset( $rss );

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}

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/**

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* Handles updating settings for the current RSS widget instance.

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*

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* @since 2.8.0

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*

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

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* WP_Widget::form().

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

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* @return array Updated settings to save.

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*/

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public function update( $new_instance, $old_instance ) {

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

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return wp_widget_rss_process( $new_instance, $testurl );

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}

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/**

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* Outputs the settings form for the RSS widget.

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*

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* @since 2.8.0

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*

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* @param array $instance Current settings.

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*/

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public function form( $instance ) {

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if ( empty( $instance ) ) {

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$instance = array(

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'title' => '',

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'url' => '',

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'items' => 10,

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'error' => false,

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'show_summary' => 0,

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'show_author' => 0,

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'show_date' => 0,

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);

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}

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

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wp_widget_rss_form( $instance );

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}

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}

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