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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   * @global WP_Post $post                                   Global post object.
  37   * @global int     $block_core_latest_posts_excerpt_length Excerpt length set by the Latest Posts core block.
  38   *
  39   * @param array $attributes The block attributes.
  40   *
  41   * @return string Returns the post content with latest posts added.
  42   */
  43  function render_block_core_latest_posts( $attributes ) {
  44      global $post, $block_core_latest_posts_excerpt_length;
  45  
  46      $args = array(
  47          'posts_per_page'      => $attributes['postsToShow'],
  48          'post_status'         => 'publish',
  49          'order'               => $attributes['order'],
  50          'orderby'             => $attributes['orderBy'],
  51          'ignore_sticky_posts' => true,
  52          'no_found_rows'       => true,
  53      );
  54  
  55      $block_core_latest_posts_excerpt_length = $attributes['excerptLength'];
  56      add_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
  57  
  58      if ( ! empty( $attributes['categories'] ) ) {
  59          $args['category__in'] = array_column( $attributes['categories'], 'id' );
  60      }
  61      if ( isset( $attributes['selectedAuthor'] ) ) {
  62          $args['author'] = $attributes['selectedAuthor'];
  63      }
  64  
  65      $query        = new WP_Query();
  66      $recent_posts = $query->query( $args );
  67  
  68      if ( isset( $attributes['displayFeaturedImage'] ) && $attributes['displayFeaturedImage'] ) {
  69          update_post_thumbnail_cache( $query );
  70      }
  71  
  72      $list_items_markup = '';
  73  
  74      foreach ( $recent_posts as $post ) {
  75          $post_link = esc_url( get_permalink( $post ) );
  76          $title     = get_the_title( $post );
  77  
  78          if ( ! $title ) {
  79              $title = __( '(no title)' );
  80          }
  81  
  82          $list_items_markup .= '<li>';
  83  
  84          if ( $attributes['displayFeaturedImage'] && has_post_thumbnail( $post ) ) {
  85              $image_style = '';
  86              if ( isset( $attributes['featuredImageSizeWidth'] ) ) {
  87                  $image_style .= sprintf( 'max-width:%spx;', $attributes['featuredImageSizeWidth'] );
  88              }
  89              if ( isset( $attributes['featuredImageSizeHeight'] ) ) {
  90                  $image_style .= sprintf( 'max-height:%spx;', $attributes['featuredImageSizeHeight'] );
  91              }
  92  
  93              $image_classes = 'wp-block-latest-posts__featured-image';
  94              if ( isset( $attributes['featuredImageAlign'] ) ) {
  95                  $image_classes .= ' align' . $attributes['featuredImageAlign'];
  96              }
  97  
  98              $featured_image = get_the_post_thumbnail(
  99                  $post,
 100                  $attributes['featuredImageSizeSlug'],
 101                  array(
 102                      'style' => esc_attr( $image_style ),
 103                  )
 104              );
 105              if ( $attributes['addLinkToFeaturedImage'] ) {
 106                  $featured_image = sprintf(
 107                      '<a href="%1$s" aria-label="%2$s">%3$s</a>',
 108                      esc_url( $post_link ),
 109                      esc_attr( $title ),
 110                      $featured_image
 111                  );
 112              }
 113              $list_items_markup .= sprintf(
 114                  '<div class="%1$s">%2$s</div>',
 115                  esc_attr( $image_classes ),
 116                  $featured_image
 117              );
 118          }
 119  
 120          $list_items_markup .= sprintf(
 121              '<a class="wp-block-latest-posts__post-title" href="%1$s">%2$s</a>',
 122              esc_url( $post_link ),
 123              $title
 124          );
 125  
 126          if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 127              $author_display_name = get_the_author_meta( 'display_name', $post->post_author );
 128  
 129              /* translators: byline. %s: author. */
 130              $byline = sprintf( __( 'by %s' ), $author_display_name );
 131  
 132              if ( ! empty( $author_display_name ) ) {
 133                  $list_items_markup .= sprintf(
 134                      '<div class="wp-block-latest-posts__post-author">%1$s</div>',
 135                      $byline
 136                  );
 137              }
 138          }
 139  
 140          if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 141              $list_items_markup .= sprintf(
 142                  '<time datetime="%1$s" class="wp-block-latest-posts__post-date">%2$s</time>',
 143                  esc_attr( get_the_date( 'c', $post ) ),
 144                  get_the_date( '', $post )
 145              );
 146          }
 147  
 148          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 149              && isset( $attributes['displayPostContentRadio'] ) && 'excerpt' === $attributes['displayPostContentRadio'] ) {
 150  
 151              $trimmed_excerpt = get_the_excerpt( $post );
 152  
 153              /*
 154               * Adds a "Read more" link with screen reader text.
 155               * [&hellip;] is the default excerpt ending from wp_trim_excerpt() in Core.
 156               */
 157              if ( str_ends_with( $trimmed_excerpt, ' [&hellip;]' ) ) {
 158                  /** This filter is documented in wp-includes/formatting.php */
 159                  $excerpt_length = (int) apply_filters( 'excerpt_length', $block_core_latest_posts_excerpt_length );
 160                  if ( $excerpt_length <= $block_core_latest_posts_excerpt_length ) {
 161                      $trimmed_excerpt  = substr( $trimmed_excerpt, 0, -11 );
 162                      $trimmed_excerpt .= sprintf(
 163                          /* translators: 1: A URL to a post, 2: Hidden accessibility text: Post title */
 164                          __( '… <a class="wp-block-latest-posts__read-more" href="%1$s" rel="noopener noreferrer">Read more<span class="screen-reader-text">: %2$s</span></a>' ),
 165                          esc_url( $post_link ),
 166                          esc_html( $title )
 167                      );
 168                  }
 169              }
 170  
 171              if ( post_password_required( $post ) ) {
 172                  $trimmed_excerpt = __( 'This content is password protected.' );
 173              }
 174  
 175              $list_items_markup .= sprintf(
 176                  '<div class="wp-block-latest-posts__post-excerpt">%1$s</div>',
 177                  $trimmed_excerpt
 178              );
 179          }
 180  
 181          if ( isset( $attributes['displayPostContent'] ) && $attributes['displayPostContent']
 182              && isset( $attributes['displayPostContentRadio'] ) && 'full_post' === $attributes['displayPostContentRadio'] ) {
 183  
 184              $post_content = html_entity_decode( $post->post_content, ENT_QUOTES, get_option( 'blog_charset' ) );
 185  
 186              if ( post_password_required( $post ) ) {
 187                  $post_content = __( 'This content is password protected.' );
 188              }
 189  
 190              $list_items_markup .= sprintf(
 191                  '<div class="wp-block-latest-posts__post-full-content">%1$s</div>',
 192                  wp_kses_post( $post_content )
 193              );
 194          }
 195  
 196          $list_items_markup .= "</li>\n";
 197      }
 198  
 199      remove_filter( 'excerpt_length', 'block_core_latest_posts_get_excerpt_length', 20 );
 200  
 201      $classes = array( 'wp-block-latest-posts__list' );
 202      if ( isset( $attributes['postLayout'] ) && 'grid' === $attributes['postLayout'] ) {
 203          $classes[] = 'is-grid';
 204      }
 205      if ( isset( $attributes['columns'] ) && 'grid' === $attributes['postLayout'] ) {
 206          $classes[] = 'columns-' . $attributes['columns'];
 207      }
 208      if ( isset( $attributes['displayPostDate'] ) && $attributes['displayPostDate'] ) {
 209          $classes[] = 'has-dates';
 210      }
 211      if ( isset( $attributes['displayAuthor'] ) && $attributes['displayAuthor'] ) {
 212          $classes[] = 'has-author';
 213      }
 214      if ( isset( $attributes['style']['elements']['link']['color']['text'] ) ) {
 215          $classes[] = 'has-link-color';
 216      }
 217  
 218      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => implode( ' ', $classes ) ) );
 219  
 220      return sprintf(
 221          '<ul %1$s>%2$s</ul>',
 222          $wrapper_attributes,
 223          $list_items_markup
 224      );
 225  }
 226  
 227  /**
 228   * Registers the `core/latest-posts` block on server.
 229   *
 230   * @since 5.0.0
 231   */
 232  function register_block_core_latest_posts() {
 233      register_block_type_from_metadata(
 234          __DIR__ . '/latest-posts',
 235          array(
 236              'render_callback' => 'render_block_core_latest_posts',
 237          )
 238      );
 239  }
 240  add_action( 'init', 'register_block_core_latest_posts' );
 241  
 242  /**
 243   * Handles outdated versions of the `core/latest-posts` block by converting
 244   * attribute `categories` from a numeric string to an array with key `id`.
 245   *
 246   * This is done to accommodate the changes introduced in #20781 that sought to
 247   * add support for multiple categories to the block. However, given that this
 248   * block is dynamic, the usual provisions for block migration are insufficient,
 249   * as they only act when a block is loaded in the editor.
 250   *
 251   * TODO: Remove when and if the bottom client-side deprecation for this block
 252   * is removed.
 253   *
 254   * @since 5.5.0
 255   *
 256   * @param array $block A single parsed block object.
 257   *
 258   * @return array The migrated block object.
 259   */
 260  function block_core_latest_posts_migrate_categories( $block ) {
 261      if (
 262          'core/latest-posts' === $block['blockName'] &&
 263          ! empty( $block['attrs']['categories'] ) &&
 264          is_string( $block['attrs']['categories'] )
 265      ) {
 266          $block['attrs']['categories'] = array(
 267              array( 'id' => absint( $block['attrs']['categories'] ) ),
 268          );
 269      }
 270  
 271      return $block;
 272  }
 273  add_filter( 'render_block_data', 'block_core_latest_posts_migrate_categories' );