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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      $justify_class_name = empty( $attributes['justifyContent'] ) ? '' : "is-justified-{$attributes['justifyContent']}";
  23      $wrapper_attributes = get_block_wrapper_attributes( array( 'class' => $justify_class_name ) );
  24      $more_text          = ! empty( $attributes['content'] ) ? wp_kses_post( $attributes['content'] ) : __( 'Read more' );
  25      return sprintf(
  26          '<a %1s href="%2s" target="%3s">%4s</a>',
  27          $wrapper_attributes,
  28          get_the_permalink( $post_ID ),
  29          esc_attr( $attributes['linkTarget'] ),
  30          $more_text
  31      );
  32  }
  33  
  34  /**
  35   * Registers the `core/read-more` block on the server.
  36   */
  37  function register_block_core_read_more() {
  38      register_block_type_from_metadata(
  39          __DIR__ . '/read-more',
  40          array(
  41              'render_callback' => 'render_block_core_read_more',
  42          )
  43      );
  44  }
  45  add_action( 'init', 'register_block_core_read_more' );