<?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.
*
* Themes can remove the icon link by using `add_filter( 'rss_widget_feed_link', '__return_empty_string' );`.
*
* @since 5.9.0
*
* @param string|false $feed_link HTML for link to RSS feed.
* @param array $instance Array of settings for the current widget.
*/
$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 );
}
}