diff options
Diffstat (limited to 'wp-includes/blocks/rss.php')
| -rw-r--r-- | wp-includes/blocks/rss.php | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/wp-includes/blocks/rss.php b/wp-includes/blocks/rss.php new file mode 100644 index 0000000..91cdab3 --- /dev/null +++ b/wp-includes/blocks/rss.php @@ -0,0 +1,119 @@ +<?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( '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' ); |