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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/latest-posts` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * The excerpt length set by the Latest Posts core block
  10   * set at render time and used by the block itself.
  11   *
  12   * @var int
  13   */
  14  global $block_core_latest_posts_excerpt_length;
  15  $block_core_latest_posts_excerpt_length = 0;
  16  
  17  /**
  18   * Callback for the excerpt_length filter used by
  19   * the Latest Posts block at render time.
  20   *
  21   * @since 5.4.0
  22   *
  23   * @return int Returns the global $block_core_latest_posts_excerpt_length variable
  24   *             to allow the excerpt_length filter respect the Latest Block setting.
  25   */
  26  function block_core_latest_posts_get_excerpt_length() {
  27      global $block_core_latest_posts_excerpt_length;
  28      return $block_core_latest_posts_excerpt_length;
  29  }
  30  
  31  /**
  32   * Renders the `core/latest-posts` block on server.
  33   *
  34   * @since 5.0.0
  35   *
  36   * @param array $attributes The block attributes.
  37   *
  38   * @return string Returns the post content with latest posts added.
  39   */
  40  function render_block_core_latest_posts( $attributes ) {
  41      global $post, $block_core_latest_posts_excerpt_length;
  42  
  43      $args = array(
  44          'posts_per_page'      => $attributes['postsToShow'],
  45          'post_status'         => 'publish',
  46          'order'               => $attributes['order'],
  47          'orderby'             => $attributes['orderBy'],
  48          'ignore_sticky_posts' => true,
  49          'no_found_rows'       => true,
  50      );
  51  
  52      $block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
  53      add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
  54  
  55      if ( ! empty( $attributes['categories'] ) ) {
  56          $args['category__in'] = array_column( $attributes['categories'], 'id' );
  57      }
  58      if ( isset( $attributes['selectedAuthor'] ) ) {
  59          $args['author'] = $attributes['selectedAuthor'];
  60      }
  61  
  62      $query        = new WP_Query();
  63      $recent_posts = $query->query( $args );
  64  
  65      if ( isset( $attributes['displayFeaturedImage'] ) && $attributes['displayFeaturedImage'] ) {
  66          update_post_thumbnail_cache( $query );
  67      }
  68  
  69      $list_items_markup = '';
  70  
  71      foreach ( $recent_posts as $post ) {
  72          $post_link = esc_url( get_permalink( $post ) );
  73          $title     = get_the_title( $post );
  74  
  75          if ( ! $title ) {
  76              $title = __( '(no title)' );
  77          }
  78  
  79          $list_items_markup .= '<li>';
  80  
  81          if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {
  82              $image_style = '';
  83              if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
  84                  $image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
  85              }
  86              if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
  87                  $image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
  88              }
  89  
  90              $image_classes = 'wp-block-latest-posts__featured-image';
  91              if ( isset( $attributes['featuredImageAlign'] ) ) {
  92                  $image_classes .= ' align' . $attributes['featuredImageAlign'];
  93              }
  94  
  95              $featured_image = get_the_post_thumbnail(
  96                  $post,
  97                  $attributes['featuredImageSizeSlug'],
  98                  array(
  99                      'style' => esc_attr( $image_style ),
 100                  )
 101              );
 102              if ( $attributes['addLinkToFeaturedImage'] ) {
 103                  $featured_image = sprintf(
 104                      '<a href="%1$s" aria-label="%2$s">%3$s</a>',
 105                      esc_url( $post_link ),
 106                      esc_attr( $title ),
 107                      $featured_image
 108                  );
 109              }
 110              $list_items_markup .= sprintf(
 111                  '<div class="%1$s">%2$s</div>',
 112                  esc_attr( $image_classes ),
 113                  $featured_image
 114              );
 115          }
 116  
 117          $list_items_markup .= sprintf(
 118              '<a class="wp-block-latest-posts__post-title" href="%1$s">%2$s</a>',
 119              esc_url( $post_link ),
 120              $title
 121          );
 122  
 123          if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 124              $author_display_name = get_the_author_meta( 'display_name', $post->post_author );
 125  
 126              /* translators: byline. %s: author. */
 127              $byline = sprintf( __( 'by %s' ), $author_display_name );
 128  
 129              if ( ! empty( $author_display_name ) ) {
 130                  $list_items_markup .= sprintf(
 131                      '<div class="wp-block-latest-posts__post-author">%1$s</div>',
 132                      $byline
 133                  );
 134              }
 135          }
 136  
 137          if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 138              $list_items_markup .= sprintf(
 139                  '<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
 140                  esc_attr( get_the_date( 'c', $post ) ),
 141                  get_the_date( '', $post )
 142              );
 143          }
 144  
 145          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 146              && isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {
 147  
 148              $trimmed_excerpt = get_the_excerpt( $post );
 149  
 150              /*
 151               * Adds a "Read more" link with screen reader text.
 152               * [&hellip;] is the default excerpt ending from wp_trim_excerpt() in Core.
 153               */
 154              if ( str_ends_with( $trimmed_excerpt, ' [&hellip;]' ) ) {
 155                  /** This filter is documented in wp-includes/formatting.php */
 156                  $excerpt_length = (int) apply_filters( 'excerpt_length', $block_core_latest_posts_excerpt_length );
 157                  if ( $excerpt_length <= $block_core_latest_posts_excerpt_length ) {
 158                      $trimmed_excerpt  = substr( $trimmed_excerpt, 0, -11 );
 159                      $trimmed_excerpt .= sprintf(
 160                          /* translators: 1: A URL to a post, 2: Hidden accessibility text: Post title */
 161                          __( '… <a class="wp-block-latest-posts__read-more" href="%1$s" rel="noopener noreferrer">Read more<span class="screen-reader-text">: %2$s</span></a>' ),
 162                          esc_url( $post_link ),
 163                          esc_html( $title )
 164                      );
 165                  }
 166              }
 167  
 168              if ( post_password_required( $post ) ) {
 169                  $trimmed_excerpt = __( 'This content is password protected.' );
 170              }
 171  
 172              $list_items_markup .= sprintf(
 173                  '<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
 174                  $trimmed_excerpt
 175              );
 176          }
 177  
 178          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 179              && isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
 180  
 181              $post_content = html_entity_decode( $post->post_content, ENT_QUOTES, get_option( 'blog_charset' ) );
 182  
 183              if ( post_password_required( $post ) ) {
 184                  $post_content = __( 'This content is password protected.' );
 185              }
 186  
 187              $list_items_markup .= sprintf(
 188                  '<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
 189                  wp_kses_post( $post_content )
 190              );
 191          }
 192  
 193          $list_items_markup .= "</li>\n";
 194      }
 195  
 196      remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
 197  
 198      $classes = array( 'wp-block-latest-posts__list' );
 199      if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {
 200          $classes[] = 'is-grid';
 201      }
 202      if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {
 203          $classes[] = 'columns-' . $attributes['columns'];
 204      }
 205      if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 206          $classes[] = 'has-dates';
 207      }
 208      if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 209          $classes[] = 'has-author';
 210      }
 211      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 212          $classes[] = 'has-link-color';
 213      }
 214  
 215      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 216  
 217      return sprintf(
 218          '<ul %1$s>%2$s</ul>',
 219          $wrapper_attributes,
 220          $list_items_markup
 221      );
 222  }
 223  
 224  /**
 225   * Registers the `core/latest-posts` block on server.
 226   *
 227   * @since 5.0.0
 228   */
 229  function register_block_core_latest_posts() {
 230      register_block_type_from_metadata(
 231          __DIR__ . '/latest-posts',
 232          array(
 233              'render_callback' => 'render_block_core_latest_posts',
 234          )
 235      );
 236  }
 237  add_action( 'init', 'register_block_core_latest_posts' );
 238  
 239  /**
 240   * Handles outdated versions of the `core/latest-posts` block by converting
 241   * attribute `categories` from a numeric string to an array with key `id`.
 242   *
 243   * This is done to accommodate the changes introduced in #20781 that sought to
 244   * add support for multiple categories to the block. However, given that this
 245   * block is dynamic, the usual provisions for block migration are insufficient,
 246   * as they only act when a block is loaded in the editor.
 247   *
 248   * TODO: Remove when and if the bottom client-side deprecation for this block
 249   * is removed.
 250   *
 251   * @since 5.5.0
 252   *
 253   * @param array $block A single parsed block object.
 254   *
 255   * @return array The migrated block object.
 256   */
 257  function block_core_latest_posts_migrate_categories( $block ) {
 258      if (
 259          'core/latest-posts' === $block['blockName'] &&
 260          ! empty( $block['attrs']['categories'] ) &&
 261          is_string( $block['attrs']['categories'] )
 262      ) {
 263          $block['attrs']['categories'] = array(
 264              array( 'id' => absint( $block['attrs']['categories'] ) ),
 265          );
 266      }
 267  
 268      return $block;
 269  }
 270  add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );