138 lines
3.8 KiB
PHP
138 lines
3.8 KiB
PHP
<?php
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/**
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* Server-side rendering of the `core/rss` block.
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*
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* @package WordPress
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*/
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/**
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* Renders the `core/rss` block on server.
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*
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* @param array $attributes The block attributes.
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*
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* @return string Returns the block content with received rss items.
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*/
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function render_block_core_rss( $attributes ) {
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$rss = fetch_feed( $attributes['feedURL'] );
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if ( is_wp_error( $rss ) ) {
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return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . $rss->get_error_message() . '</div></div>';
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}
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if ( ! $rss->get_item_quantity() ) {
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// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
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$rss->__destruct();
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unset( $rss );
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return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'An error has occurred, which probably means the feed is down. Try again later.' ) . '</div></div>';
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}
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$rss_items = $rss->get_items( 0, $attributes['itemsToShow'] );
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$list_items = '';
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foreach ( $rss_items as $item ) {
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$title = esc_html( trim( strip_tags( $item->get_title() ) ) );
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if ( empty( $title ) ) {
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$title = __( '(Untitled)' );
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}
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$link = $item->get_link();
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$link = esc_url( $link );
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if ( $link ) {
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$title = "<a href='{$link}'>{$title}</a>";
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}
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$title = "<div class='wp-block-rss__item-title'>{$title}</div>";
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$date = '';
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if ( $attributes['displayDate'] ) {
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$date = $item->get_date( 'U' );
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if ( $date ) {
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$date = sprintf(
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'<time datetime="%1$s" class="wp-block-rss__item-publish-date">%2$s</time> ',
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date_i18n( get_option( 'c' ), $date ),
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date_i18n( get_option( 'date_format' ), $date )
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);
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}
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}
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$author = '';
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if ( $attributes['displayAuthor'] ) {
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$author = $item->get_author();
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if ( is_object( $author ) ) {
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$author = $author->get_name();
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$author = '<span class="wp-block-rss__item-author">' . __( 'by' ) . ' ' . esc_html( strip_tags( $author ) ) . '</span>';
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}
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}
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$excerpt = '';
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if ( $attributes['displayExcerpt'] ) {
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$excerpt = html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) );
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$excerpt = esc_attr( wp_trim_words( $excerpt, $attributes['excerptLength'], ' […]' ) );
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// Change existing [...] to […].
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if ( '[...]' == substr( $excerpt, -5 ) ) {
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$excerpt = substr( $excerpt, 0, -5 ) . '[…]';
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}
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$excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html( $excerpt ) . '</div>';
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}
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$list_items .= "<li class='wp-block-rss__item'>{$title}{$date}{$author}{$excerpt}</li>";
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}
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$classes = 'grid' === $attributes['blockLayout'] ? ' is-grid columns-' . $attributes['columns'] : '';
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$list_items_markup = "<ul class='wp-block-rss{$classes}'>{$list_items}</ul>";
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// PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
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$rss->__destruct();
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unset( $rss );
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return $list_items_markup;
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}
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/**
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* Registers the `core/rss` block on server.
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*/
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function register_block_core_rss() {
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register_block_type( 'core/rss',
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array(
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'attributes' => array(
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'columns' => array(
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'type' => 'number',
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'default' => 2,
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),
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'blockLayout' => array(
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'type' => 'string',
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'default' => 'list',
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),
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'feedURL' => array(
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'type' => 'string',
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'default' => '',
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),
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'itemsToShow' => array(
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'type' => 'number',
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'default' => 5,
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),
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'displayExcerpt' => array(
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'type' => 'boolean',
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'default' => false,
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),
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'displayAuthor' => array(
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'type' => 'boolean',
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'default' => false,
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),
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'displayDate' => array(
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'type' => 'boolean',
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'default' => false,
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),
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'excerptLength' => array(
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'type' => 'number',
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'default' => 55,
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),
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),
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'render_callback' => 'render_block_core_rss',
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)
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);
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}
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add_action( 'init', 'register_block_core_rss' );
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