rss.php in Gutenberg 8

File

vendor/gutenberg/block-library/blocks/rss.php

<?php

/**
 * Server-side rendering of the `core/rss` block.
 *
 * @package WordPress
 */

/**
 * Renders the `core/rss` block on server.
 *
 * @param array $attributes The block attributes.
 *
 * @return string Returns the block content with received rss items.
 */
function gutenberg_render_block_core_rss($attributes) {
  $rss = fetch_feed($attributes['feedURL']);
  if (is_wp_error($rss)) {
    return '<div class="components-placeholder"><div class="notice notice-error"><strong>' . __('RSS Error:') . '</strong> ' . $rss
      ->get_error_message() . '</div></div>';
  }
  if (!$rss
    ->get_item_quantity()) {

    // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
    $rss
      ->__destruct();
    unset($rss);
    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> ', date_i18n(get_option('c'), $date), date_i18n(get_option('date_format'), $date));
      }
    }
    $author = '';
    if ($attributes['displayAuthor']) {
      $author = $item
        ->get_author();
      if (is_object($author)) {
        $author = $author
          ->get_name();
        $author = '<span class="wp-block-rss__item-author">' . __('by') . ' ' . esc_html(strip_tags($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'], ' [&hellip;]'));

      // Change existing [...] to [&hellip;].
      if ('[...]' === substr($excerpt, -5)) {
        $excerpt = substr($excerpt, 0, -5) . '[&hellip;]';
      }
      $excerpt = '<div class="wp-block-rss__item-excerpt">' . esc_html($excerpt) . '</div>';
    }
    $list_items .= "<li class='wp-block-rss__item'>{$title}{$date}{$author}{$excerpt}</li>";
  }
  $class = 'wp-block-rss';
  if (isset($attributes['align'])) {
    $class .= ' align' . $attributes['align'];
  }
  if (isset($attributes['blockLayout']) && 'grid' === $attributes['blockLayout']) {
    $class .= ' is-grid';
  }
  if (isset($attributes['columns']) && 'grid' === $attributes['blockLayout']) {
    $class .= ' columns-' . $attributes['columns'];
  }
  if (isset($attributes['className'])) {
    $class .= ' ' . $attributes['className'];
  }
  $list_items_markup = "<ul class='{$class}'>{$list_items}</ul>";

  // PHP 5.2 compatibility. See: http://simplepie.org/wiki/faq/i_m_getting_memory_leaks.
  $rss
    ->__destruct();
  unset($rss);
  return $list_items_markup;
}

/**
 * Registers the `core/rss` block on server.
 */
function gutenberg_register_block_core_rss() {
  register_block_type('core/rss', array(
    'attributes' => array(
      'align' => array(
        'type' => 'string',
        'enum' => array(
          'left',
          'center',
          'right',
          'wide',
          'full',
        ),
      ),
      'className' => array(
        'type' => 'string',
      ),
      'columns' => array(
        'type' => 'number',
        'default' => 2,
      ),
      'blockLayout' => array(
        'type' => 'string',
        'default' => 'list',
      ),
      'feedURL' => array(
        'type' => 'string',
        'default' => '',
      ),
      'itemsToShow' => array(
        'type' => 'number',
        'default' => 5,
      ),
      'displayExcerpt' => array(
        'type' => 'boolean',
        'default' => false,
      ),
      'displayAuthor' => array(
        'type' => 'boolean',
        'default' => false,
      ),
      'displayDate' => array(
        'type' => 'boolean',
        'default' => false,
      ),
      'excerptLength' => array(
        'type' => 'number',
        'default' => 55,
      ),
    ),
    'render_callback' => 'gutenberg_render_block_core_rss',
  ));
}
add_action('init', 'gutenberg_register_block_core_rss', 20);

Functions

Name	Description
gutenberg_register_block_core_rss	Registers the `core/rss` block on server.
gutenberg_render_block_core_rss	Renders the `core/rss` block on server.