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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   * @since 6.0.0
  12   *
  13   * @param array    $attributes Block attributes.
  14   * @param string   $content    Block default content.
  15   * @param WP_Block $block      Block instance.
  16   * @return string  Returns the post link.
  17   */
  18  function render_block_core_read_more( $attributes, $content, $block ) {
  19      if ( ! isset( $block->context['postId'] ) ) {
  20          return '';
  21      }
  22  
  23      $post_ID    = $block->context['postId'];
  24      $post_title = get_the_title( $post_ID );
  25      if ( '' === $post_title ) {
  26          $post_title = sprintf(
  27              /* translators: %s is post ID to describe the link for screen readers. */
  28              __( 'untitled post %s' ),
  29              $post_ID
  30          );
  31      }
  32      $screen_reader_text = sprintf(
  33          /* translators: %s is either the post title or post ID to describe the link for screen readers. */
  34          __( ': %s' ),
  35          $post_title
  36      );
  37      $justify_class_name = empty( $attributes['justifyContent'] ) ? '' : "is-justified-{$attributes['justifyContent']}";
  38      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $justify_class_name ) );
  39      $more_text          = ! empty( $attributes['content'] ) ? wp_kses_post( $attributes['content'] ) : __( 'Read more' );
  40      return sprintf(
  41          '<a %1s href="%2s" target="%3s">%4s<span class="screen-reader-text">%5s</span></a>',
  42          $wrapper_attributes,
  43          get_the_permalink( $post_ID ),
  44          esc_attr( $attributes['linkTarget'] ),
  45          $more_text,
  46          $screen_reader_text
  47      );
  48  }
  49  
  50  /**
  51   * Registers the `core/read-more` block on the server.
  52   *
  53   * @since 6.0.0
  54   */
  55  function register_block_core_read_more() {
  56      register_block_type_from_metadata(
  57          __DIR__ . '/read-more',
  58          array(
  59              'render_callback' => 'render_block_core_read_more',
  60          )
  61      );
  62  }
  63  add_action( 'init', 'register_block_core_read_more' );