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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  
  48      $args = array(
  49          'posts_per_page'      => $attributes['postsToShow'],
  50          'post_status'         => 'publish',
  51          'order'               => $attributes['order'],
  52          'orderby'             => $attributes['orderBy'],
  53          'ignore_sticky_posts' => true,
  54          'no_found_rows'       => true,
  55      );
  56  
  57      $block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
  58      add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
  59  
  60      if ( ! empty( $attributes['categories'] ) ) {
  61          $args['category__in'] = array_column( $attributes['categories'], 'id' );
  62      }
  63      if ( isset( $attributes['selectedAuthor'] ) ) {
  64          $args['author'] = $attributes['selectedAuthor'];
  65      }
  66  
  67      $query        = new WP_Query();
  68      $recent_posts = $query->query( $args );
  69  
  70      if ( isset( $attributes['displayFeaturedImage'] ) && $attributes['displayFeaturedImage'] ) {
  71          update_post_thumbnail_cache( $query );
  72      }
  73  
  74      $list_items_markup = '';
  75  
  76      foreach ( $recent_posts as $post ) {
  77          $post_link = esc_url( get_permalink( $post ) );
  78          $title     = get_the_title( $post );
  79  
  80          if ( ! $title ) {
  81              $title = __( '(no title)' );
  82          }
  83  
  84          $list_items_markup .= '<li>';
  85  
  86          if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {
  87              $image_style = '';
  88              if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
  89                  $image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
  90              }
  91              if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
  92                  $image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
  93              }
  94  
  95              $image_classes = 'wp-block-latest-posts__featured-image';
  96              if ( isset( $attributes['featuredImageAlign'] ) ) {
  97                  $image_classes .= ' align' . $attributes['featuredImageAlign'];
  98              }
  99  
 100              $featured_image = get_the_post_thumbnail(
 101                  $post,
 102                  $attributes['featuredImageSizeSlug'],
 103                  array(
 104                      'style' => esc_attr( $image_style ),
 105                  )
 106              );
 107              if ( $attributes['addLinkToFeaturedImage'] ) {
 108                  $featured_image = sprintf(
 109                      '<a href="%1$s" aria-label="%2$s">%3$s</a>',
 110                      esc_url( $post_link ),
 111                      esc_attr( $title ),
 112                      $featured_image
 113                  );
 114              }
 115              $list_items_markup .= sprintf(
 116                  '<div class="%1$s">%2$s</div>',
 117                  esc_attr( $image_classes ),
 118                  $featured_image
 119              );
 120          }
 121  
 122          $list_items_markup .= sprintf(
 123              '<a class="wp-block-latest-posts__post-title" href="%1$s">%2$s</a>',
 124              esc_url( $post_link ),
 125              $title
 126          );
 127  
 128          if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 129              $author_display_name = get_the_author_meta( 'display_name', $post->post_author );
 130  
 131              /* translators: byline. %s: author. */
 132              $byline = sprintf( __( 'by %s' ), $author_display_name );
 133  
 134              if ( ! empty( $author_display_name ) ) {
 135                  $list_items_markup .= sprintf(
 136                      '<div class="wp-block-latest-posts__post-author">%1$s</div>',
 137                      $byline
 138                  );
 139              }
 140          }
 141  
 142          if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 143              $list_items_markup .= sprintf(
 144                  '<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
 145                  esc_attr( get_the_date( 'c', $post ) ),
 146                  get_the_date( '', $post )
 147              );
 148          }
 149  
 150          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 151              && isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {
 152  
 153              $trimmed_excerpt = get_the_excerpt( $post );
 154  
 155              /*
 156               * Adds a "Read more" link with screen reader text.
 157               * [&hellip;] is the default excerpt ending from wp_trim_excerpt() in Core.
 158               */
 159              if ( str_ends_with( $trimmed_excerpt, ' [&hellip;]' ) ) {
 160                  /** This filter is documented in wp-includes/formatting.php */
 161                  $excerpt_length = (int) apply_filters( 'excerpt_length', $block_core_latest_posts_excerpt_length );
 162                  if ( $excerpt_length <= $block_core_latest_posts_excerpt_length ) {
 163                      $trimmed_excerpt  = substr( $trimmed_excerpt, 0, -11 );
 164                      $trimmed_excerpt .= sprintf(
 165                          /* translators: 1: A URL to a post, 2: Hidden accessibility text: Post title */
 166                          __( '… <a class="wp-block-latest-posts__read-more" href="%1$s" rel="noopener noreferrer">Read more<span class="screen-reader-text">: %2$s</span></a>' ),
 167                          esc_url( $post_link ),
 168                          esc_html( $title )
 169                      );
 170                  }
 171              }
 172  
 173              if ( post_password_required( $post ) ) {
 174                  $trimmed_excerpt = __( 'This content is password protected.' );
 175              }
 176  
 177              $list_items_markup .= sprintf(
 178                  '<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
 179                  $trimmed_excerpt
 180              );
 181          }
 182  
 183          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 184              && isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
 185  
 186              $post_content = html_entity_decode( $post->post_content, ENT_QUOTES, get_option( 'blog_charset' ) );
 187  
 188              if ( post_password_required( $post ) ) {
 189                  $post_content = __( 'This content is password protected.' );
 190              }
 191  
 192              $list_items_markup .= sprintf(
 193                  '<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
 194                  wp_kses_post( $post_content )
 195              );
 196          }
 197  
 198          $list_items_markup .= "</li>\n";
 199      }
 200  
 201      remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
 202  
 203      $classes = array( 'wp-block-latest-posts__list' );
 204      if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {
 205          $classes[] = 'is-grid';
 206      }
 207      if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {
 208          $classes[] = 'columns-' . $attributes['columns'];
 209      }
 210      if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 211          $classes[] = 'has-dates';
 212      }
 213      if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 214          $classes[] = 'has-author';
 215      }
 216      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 217          $classes[] = 'has-link-color';
 218      }
 219  
 220      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 221  
 222      return sprintf(
 223          '<ul %1$s>%2$s</ul>',
 224          $wrapper_attributes,
 225          $list_items_markup
 226      );
 227  }
 228  
 229  /**
 230   * Registers the `core/latest-posts` block on server.
 231   *
 232   * @since 5.0.0
 233   */
 234  function register_block_core_latest_posts() {
 235      register_block_type_from_metadata(
 236          __DIR__ . '/latest-posts',
 237          array(
 238              'render_callback' => 'render_block_core_latest_posts',
 239          )
 240      );
 241  }
 242  add_action( 'init', 'register_block_core_latest_posts' );
 243  
 244  /**
 245   * Handles outdated versions of the `core/latest-posts` block by converting
 246   * attribute `categories` from a numeric string to an array with key `id`.
 247   *
 248   * This is done to accommodate the changes introduced in #20781 that sought to
 249   * add support for multiple categories to the block. However, given that this
 250   * block is dynamic, the usual provisions for block migration are insufficient,
 251   * as they only act when a block is loaded in the editor.
 252   *
 253   * TODO: Remove when and if the bottom client-side deprecation for this block
 254   * is removed.
 255   *
 256   * @since 5.5.0
 257   *
 258   * @param array $block A single parsed block object.
 259   *
 260   * @return array The migrated block object.
 261   */
 262  function block_core_latest_posts_migrate_categories( $block ) {
 263      if (
 264          'core/latest-posts' === $block['blockName'] &&
 265          ! empty( $block['attrs']['categories'] ) &&
 266          is_string( $block['attrs']['categories'] )
 267      ) {
 268          $block['attrs']['categories'] = array(
 269              array( 'id' => absint( $block['attrs']['categories'] ) ),
 270          );
 271      }
 272  
 273      return $block;
 274  }
 275  add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );