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- <?php
- /**
- * Server-side rendering of the `core/rss` block.
- *
- * @package WordPress
- */
- /**
- * Renders the `core/rss` block on server.
- *
- * @param array $attributes The block attributes.
- *
- * @return string Returns the block content with received rss items.
- */
- function render_block_core_rss( $attributes ) {
- if ( in_array( untrailingslashit( $attributes['feedURL'] ), array( site_url(), home_url() ), true ) ) {
- return '<div class="components-placeholder"><div class="notice notice-error">' . __( 'Adding an RSS feed to this site’s homepage is not supported, as it could lead to a loop that slows down your site. Try using another block, like the <strong>Latest Posts</strong> block, to list posts from the site.' ) . '</div></div>';
- }
- $rss = fetch_feed( $attributes['feedURL'] );
- if ( is_wp_error( $rss ) ) {
- return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __( 'RSS Error:' ) . '</strong> ' . esc_html( $rss->get_error_message() ) . '</div></div>';
- }
- if ( ! $rss->get_item_quantity() ) {
- 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>';
- }
- $rss_items = $rss->get_items( 0, $attributes['itemsToShow'] );
- $list_items = '';
- foreach ( $rss_items as $item ) {
- $title = esc_html( trim( strip_tags( $item->get_title() ) ) );
- if ( empty( $title ) ) {
- $title = __( '(no title)' );
- }
- $link = $item->get_link();
- $link = esc_url( $link );
- if ( $link ) {
- $title = "<a href='{$link}'>{$title}</a>";
- }
- $title = "<div class='wp-block-rss__item-title'>{$title}</div>";
- $date = '';
- if ( $attributes['displayDate'] ) {
- $date = $item->get_date( 'U' );
- if ( $date ) {
- $date = sprintf(
- '<time datetime="%1$s" class="wp-block-rss__item-publish-date">%2$s</time> ',
- esc_attr( date_i18n( get_option( 'c' ), $date ) ),
- esc_attr( date_i18n( get_option( 'date_format' ), $date ) )
- );
- }
- }
- $author = '';
- if ( $attributes['displayAuthor'] ) {
- $author = $item->get_author();
- if ( is_object( $author ) ) {
- $author = $author->get_name();
- $author = '<span class="wp-block-rss__item-author">' . sprintf(
- /* translators: %s: the author. */
- __( 'by %s' ),
- esc_html( strip_tags( $author ) )
- ) . '</span>';
- }
- }
- $excerpt = '';
- if ( $attributes['displayExcerpt'] ) {
- $excerpt = html_entity_decode( $item->get_description(), ENT_QUOTES, get_option( 'blog_charset' ) );
- $excerpt = esc_attr( wp_trim_words( $excerpt, $attributes['excerptLength'], ' […]' ) );
- // Change existing [...] to […].
- if ( '[...]' === substr( $excerpt, -5 ) ) {
- $excerpt = substr( $excerpt, 0, -5 ) . '[…]';
- }
- $excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html( $excerpt ) . '</div>';
- }
- $list_items .= "<li class='wp-block-rss__item'>{$title}{$date}{$author}{$excerpt}</li>";
- }
- $classnames = array();
- if ( isset( $attributes['blockLayout'] ) && 'grid' === $attributes['blockLayout'] ) {
- $classnames[] = 'is-grid';
- }
- if ( isset( $attributes['columns'] ) && 'grid' === $attributes['blockLayout'] ) {
- $classnames[] = 'columns-' . $attributes['columns'];
- }
- if ( $attributes['displayDate'] ) {
- $classnames[] = 'has-dates';
- }
- if ( $attributes['displayAuthor'] ) {
- $classnames[] = 'has-authors';
- }
- if ( $attributes['displayExcerpt'] ) {
- $classnames[] = 'has-excerpts';
- }
- $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classnames ) ) );
- return sprintf( '<ul %s>%s</ul>', $wrapper_attributes, $list_items );
- }
- /**
- * Registers the `core/rss` block on server.
- */
- function register_block_core_rss() {
- register_block_type_from_metadata(
- __DIR__ . '/rss',
- array(
- 'render_callback' => 'render_block_core_rss',
- )
- );
- }
- add_action( 'init', 'register_block_core_rss' );
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