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   1  <?php
   2  /**
   3   * Server-side rendering of the `core/read-more` block.
   4   *
   5   * @package WordPress
   6   */
   7  
   8  /**
   9   * Renders the `core/read-more` block on the server.
  10   *
  11   * @param array    $attributes Block attributes.
  12   * @param string   $content    Block default content.
  13   * @param WP_Block $block      Block instance.
  14   * @return string  Returns the post link.
  15   */
  16  function render_block_core_read_more( $attributes, $content, $block ) {
  17      if ( ! isset( $block->context['postId'] ) ) {
  18          return '';
  19      }
  20  
  21      $post_ID    = $block->context['postId'];
  22      $post_title = get_the_title( $post_ID );
  23      if ( '' === $post_title ) {
  24          $post_title = sprintf(
  25              /* translators: %s is post ID to describe the link for screen readers. */
  26              __( 'untitled post %s' ),
  27              $post_ID
  28          );
  29      }
  30      $screen_reader_text = sprintf(
  31          /* translators: %s is either the post title or post ID to describe the link for screen readers. */
  32          __( ': %s' ),
  33          $post_title
  34      );
  35      $justify_class_name = empty( $attributes['justifyContent'] ) ? '' : "is-justified-{$attributes['justifyContent']}";
  36      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $justify_class_name ) );
  37      $more_text          = ! empty( $attributes['content'] ) ? wp_kses_post( $attributes['content'] ) : __( 'Read more' );
  38      return sprintf(
  39          '<a %1s href="%2s" target="%3s">%4s<span class="screen-reader-text">%5s</span></a>',
  40          $wrapper_attributes,
  41          get_the_permalink( $post_ID ),
  42          esc_attr( $attributes['linkTarget'] ),
  43          $more_text,
  44          $screen_reader_text
  45      );
  46  }
  47  
  48  /**
  49   * Registers the `core/read-more` block on the server.
  50   */
  51  function register_block_core_read_more() {
  52      register_block_type_from_metadata(
  53          __DIR__ . '/read-more',
  54          array(
  55              'render_callback' => 'render_block_core_read_more',
  56          )
  57      );
  58  }
  59  add_action( 'init', 'register_block_core_read_more' );