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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   * @global int $block_core_latest_posts_excerpt_length Excerpt length set by the Latest Posts core block.
  24   *
  25   * @return int Returns the global $block_core_latest_posts_excerpt_length variable
  26   *             to allow the excerpt_length filter respect the Latest Block setting.
  27   */
  28  function block_core_latest_posts_get_excerpt_length() {
  29      global $block_core_latest_posts_excerpt_length;
  30      return $block_core_latest_posts_excerpt_length;
  31  }
  32  
  33  /**
  34   * Renders the `core/latest-posts` block on server.
  35   *
  36   * @since 5.0.0
  37   *
  38   * @global WP_Post $post                                   Global post object.
  39   * @global int     $block_core_latest_posts_excerpt_length Excerpt length set by the Latest Posts core block.
  40   *
  41   * @param array $attributes The block attributes.
  42   *
  43   * @return string Returns the post content with latest posts added.
  44   */
  45  function render_block_core_latest_posts( $attributes ) {
  46      global $post, $block_core_latest_posts_excerpt_length;
  47      static $rendering_stack = array();
  48  
  49      $args = array(
  50          'posts_per_page'      => $attributes['postsToShow'],
  51          'post_status'         => 'publish',
  52          'order'               => $attributes['order'],
  53          'orderby'             => $attributes['orderBy'],
  54          'ignore_sticky_posts' => true,
  55          'no_found_rows'       => true,
  56      );
  57  
  58      $block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
  59      add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
  60  
  61      $categories = $attributes['categories'] ?? null;
  62      if ( ! empty( $categories ) && is_array( $categories ) ) {
  63          $args['category__in'] = array_column( $categories, 'id' );
  64      }
  65      if ( isset( $attributes['selectedAuthor'] ) ) {
  66          $args['author'] = $attributes['selectedAuthor'];
  67      }
  68  
  69      $query = new WP_Query( $args );
  70  
  71      if ( isset( $attributes['displayFeaturedImage'] ) && $attributes['displayFeaturedImage'] ) {
  72          update_post_thumbnail_cache( $query );
  73      }
  74  
  75      $list_items_markup = '';
  76      // Snapshot the current global post so it can be restored after the loop.
  77      // We use have_posts()/the_post() rather than foreach so that setup_postdata()
  78      // is called for each post, establishing the correct global context for
  79      // do_blocks() and other filters that run during full-content rendering.
  80      $previous_post = $post ?? null;
  81  
  82      while ( $query->have_posts() ) {
  83          $query->the_post();
  84          $post_link = esc_url( get_permalink() );
  85          $title     = get_the_title();
  86  
  87          if ( ! $title ) {
  88              $title = __( '(no title)' );
  89          }
  90  
  91          $list_items_markup .= '<li>';
  92  
  93          if ( $attributes['displayFeaturedImage'] && has_post_thumbnail() ) {
  94              $image_style = '';
  95              if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
  96                  $image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
  97              }
  98              if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
  99                  $image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
 100              }
 101  
 102              $image_classes = 'wp-block-latest-posts__featured-image';
 103              if ( isset( $attributes['featuredImageAlign'] ) ) {
 104                  $image_classes .= ' align' . $attributes['featuredImageAlign'];
 105              }
 106  
 107              $featured_image = get_the_post_thumbnail(
 108                  null,
 109                  $attributes['featuredImageSizeSlug'],
 110                  array(
 111                      'style' => esc_attr( $image_style ),
 112                  )
 113              );
 114              if ( $attributes['addLinkToFeaturedImage'] ) {
 115                  $featured_image = sprintf(
 116                      '<a href="%1$s" aria-label="%2$s">%3$s</a>',
 117                      esc_url( $post_link ),
 118                      esc_attr( $title ),
 119                      $featured_image
 120                  );
 121              }
 122              $list_items_markup .= sprintf(
 123                  '<div class="%1$s">%2$s</div>',
 124                  esc_attr( $image_classes ),
 125                  $featured_image
 126              );
 127          }
 128  
 129          $list_items_markup .= sprintf(
 130              '<a class="wp-block-latest-posts__post-title" href="%1$s">%2$s</a>',
 131              esc_url( $post_link ),
 132              $title
 133          );
 134  
 135          if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 136              $author_display_name = get_the_author_meta( 'display_name' );
 137  
 138              /* translators: byline. %s: author. */
 139              $byline = sprintf( __( 'by %s' ), $author_display_name );
 140  
 141              if ( ! empty( $author_display_name ) ) {
 142                  $list_items_markup .= sprintf(
 143                      '<div class="wp-block-latest-posts__post-author">%1$s</div>',
 144                      $byline
 145                  );
 146              }
 147          }
 148  
 149          if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 150              $list_items_markup .= sprintf(
 151                  '<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
 152                  esc_attr( get_the_date( 'c' ) ),
 153                  get_the_date( '' )
 154              );
 155          }
 156  
 157          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 158              && isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {
 159  
 160              $trimmed_excerpt = get_the_excerpt();
 161  
 162              /*
 163               * Adds a "Read more" link with screen reader text.
 164               * [&hellip;] is the default excerpt ending from wp_trim_excerpt() in Core.
 165               */
 166              if ( str_ends_with( $trimmed_excerpt, ' [&hellip;]' ) ) {
 167                  /** This filter is documented in wp-includes/formatting.php */
 168                  $excerpt_length = (int) apply_filters( 'excerpt_length', $block_core_latest_posts_excerpt_length );
 169                  if ( $excerpt_length <= $block_core_latest_posts_excerpt_length ) {
 170                      $trimmed_excerpt  = substr( $trimmed_excerpt, 0, -11 );
 171                      $trimmed_excerpt .= sprintf(
 172                          /* translators: 1: A URL to a post, 2: Hidden accessibility text: Post title */
 173                          __( '… <a class="wp-block-latest-posts__read-more" href="%1$s" rel="noopener">Read more<span class="screen-reader-text">: %2$s</span></a>' ),
 174                          esc_url( $post_link ),
 175                          esc_html( $title )
 176                      );
 177                  }
 178              }
 179  
 180              if ( post_password_required() ) {
 181                  $trimmed_excerpt = __( 'This content is password protected.' );
 182              }
 183  
 184              $list_items_markup .= sprintf(
 185                  '<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
 186                  $trimmed_excerpt
 187              );
 188          }
 189  
 190          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 191              && isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
 192  
 193              if ( post_password_required() ) {
 194                  $post_content = __( 'This content is password protected.' );
 195              } else {
 196                  $post_id      = get_the_ID();
 197                  $post_content = get_post_field( 'post_content', $post_id, 'raw' );
 198                  // Check if we're already rendering this post to prevent infinite recursion.
 199                  if ( in_array( $post_id, $rendering_stack, true ) ) {
 200                      $post_content = '';
 201                  } else {
 202                      $rendering_stack[] = $post_id;
 203  
 204                      try {
 205                          // Run through the actions that are typically taken on the_content.
 206                          $post_content = _wp_apply_block_content_filters( $post_content, 'latest-posts' );
 207                      } finally {
 208                          array_pop( $rendering_stack );
 209                      }
 210                  }
 211              }
 212  
 213              $post_content       = str_replace( ']]>', ']]&gt;', $post_content );
 214              $list_items_markup .= sprintf(
 215                  '<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
 216                  $post_content
 217              );
 218          }
 219  
 220          $list_items_markup .= "</li>\n";
 221      }
 222  
 223      // Restore the post context that was active before this secondary query.
 224      // wp_reset_postdata() is intentionally not used here: when this block is
 225      // rendered inside another post's content (e.g. via do_blocks()), it would
 226      // restore to the main query post rather than the outer rendering post.
 227      $post = $previous_post;
 228      if ( $previous_post instanceof WP_Post ) {
 229          setup_postdata( $previous_post );
 230      }
 231  
 232      remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
 233  
 234      $layout             = $attributes['layout'] ?? array();
 235      $legacy_layout_type = (
 236          isset( $attributes['postLayout'] ) &&
 237          'grid' === $attributes['postLayout']
 238      ) ? 'grid' : 'default';
 239      $layout_type        = $layout['type'] ?? $legacy_layout_type;
 240      $column_count       = $layout['columnCount'] ?? ( $attributes['columns'] ?? null );
 241  
 242      $classes = array( 'wp-block-latest-posts__list' );
 243      if ( 'grid' === $layout_type ) {
 244          $classes[] = 'is-grid';
 245      }
 246      if ( 'grid' === $layout_type && ! empty( $column_count ) ) {
 247          $classes[] = sanitize_title( 'columns-' . $column_count );
 248      }
 249      if ( 'grid' === $layout_type && ! empty( $column_count ) && ! empty( $layout['minimumColumnWidth'] ) ) {
 250          $classes[] = 'has-native-responsive-grid';
 251      }
 252      if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 253          $classes[] = 'has-dates';
 254      }
 255      if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 256          $classes[] = 'has-author';
 257      }
 258      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 259          $classes[] = 'has-link-color';
 260      }
 261  
 262      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 263  
 264      return sprintf(
 265          '<ul %1$s>%2$s</ul>',
 266          $wrapper_attributes,
 267          $list_items_markup
 268      );
 269  }
 270  
 271  /**
 272   * Registers the `core/latest-posts` block on server.
 273   *
 274   * @since 5.0.0
 275   */
 276  function register_block_core_latest_posts() {
 277      register_block_type_from_metadata(
 278          __DIR__ . '/latest-posts',
 279          array(
 280              'render_callback' => 'render_block_core_latest_posts',
 281          )
 282      );
 283  }
 284  add_action( 'init', 'register_block_core_latest_posts' );
 285  
 286  /**
 287   * Handles outdated versions of the `core/latest-posts` block by converting
 288   * attribute `categories` from a numeric string to an array with key `id`.
 289   *
 290   * This is done to accommodate the changes introduced in #20781 that sought to
 291   * add support for multiple categories to the block. However, given that this
 292   * block is dynamic, the usual provisions for block migration are insufficient,
 293   * as they only act when a block is loaded in the editor.
 294   *
 295   * TODO: Remove when and if the bottom client-side deprecation for this block
 296   * is removed.
 297   *
 298   * @since 5.5.0
 299   *
 300   * @param array $block A single parsed block object.
 301   *
 302   * @return array The migrated block object.
 303   */
 304  function block_core_latest_posts_migrate_categories( $block ) {
 305      if (
 306          'core/latest-posts' === $block['blockName'] &&
 307          ! empty( $block['attrs']['categories'] ) &&
 308          is_string( $block['attrs']['categories'] )
 309      ) {
 310          $block['attrs']['categories'] = array(
 311              array( 'id' => absint( $block['attrs']['categories'] ) ),
 312          );
 313      }
 314  
 315      return $block;
 316  }
 317  add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );