投稿者: koji

$q = new WP_Query( array(
  'post_type'      => 'post',
  'post_status'    => 'publish',
  's'              => '参考文献',
  'posts_per_page' => -1,
) );

$block_h4 = array(
  array(
    'blockName'    => 'core/heading',
    'attrs' => array(
      'level'     => 4,
      'className' => 'lf_refernces',
    ),
    'innerBlocks'  => array(),
    'innerHTML'    => '',
    'innerContent' => array(
      PHP_EOL.'<h4 class="lf_refernces">参考文献</h4>'.PHP_EOL
    ),
  ),
  array(
    'blockName'    => null,
    'attrs'        => array(),
    'innerBlocks'  => array(),
    'innerHTML'    => '',
    'innerContent' => array( PHP_EOL.PHP_EOL ),
  ),
);

$pattern = '#(（|〈)参考文献(）|〉)\<br\>(.+)#';

foreach ( $q->posts as $p ) {
  $blocks = parse_blocks( $p->post_content );

  for ( $i = 0; $i < count( $blocks ); $i++ ) {

    if ( 'core/paragraph' == $blocks[$i]['blockName'] ) {
      if ( 1 == preg_match( $pattern, $blocks[$i]['innerContent'][0], $matches ) ) {
        $blocks[$i]['attrs']['className'] = 'lf_postscript'; 
        $blocks[$i]['innerContent'][0] = PHP_EOL.'<p class="lf_postscript">'.$matches[3].PHP_EOL;
        array_splice( $blocks, $i, 0, $block_h4 );
        $content = serialize_blocks( $blocks );
        $mypost  = array(
          'ID'           => $p->ID,
          'post_content' => $content,
        );
        wp_update_post( $mypost );
        break;
      }
    }
  }
}

add_filter( 'default_content', 'lf_default_content', 10, 2 );
function lf_default_content( $post_content, $post ) {
	$is_newlist = $_GET['newlist'] ?? '';
	if ( $is_newlist ) {
		// カテゴリを list に設定する
		$list_catid = get_category_by_slug( 'list' )->term_id;
		wp_set_post_categories( $post->ID, $list_catid, true );

		// リスト用テンプレートを設定する
		update_post_meta( $post->ID, '_wp_page_template', 'templates/template-cover.php' );

		// リスト投稿のブロックパターンを読み込む
		$bpr = WP_Block_Patterns_Registry::get_instance();
		$bp  = $bpr->get_registered( 'kh/new-list' );
		$post_content = $bp['content'];
	}
	return $post_content;
}

add_filter( 'pre_render_block', 'lf_pre_render_block', 10, 2 );
function lf_pre_render_block( $pre_render, $parsed_block ) {

    $post    = get_post();
    $post_id = $post->ID ?? 0;

    if ( $post_id == get_option( 'page_on_front')
        && 'core/latest-posts' == $parsed_block['blockName'] ) {

        $slug = &$parsed_block['attrs']['categories'][0]['slug'] ?? '';
        $transient = '';

        // 今日のリスト
        if ( 'lotd' == $slug ) {
            if ( $transient = get_transient( 'LF_BLOCK_LATESTPOSTS_LOTD' ) ) {
                $pre_render = $transient;
            }

        // 新着リスト
        } elseif ( 'list' == $slug ) {
            if ( $transient = get_transient( 'LF_BLOCK_LATESTPOSTS_LIST' ) ) {
                $pre_render = $transient;
            }
        }

        // キャッシュから取得できなかったら
        if ( ! $transient ) {

            // ブロックをキャッシュする
            add_filter( 'render_block_core/latest-posts', 'lf_render_block_latest_posts', 10, 2 );
        }
    }

    return $pre_render;
}

function lf_render_block_latest_posts( $block_content, $parsed_block ) {

    // For readability and safety
    $slug = &$parsed_block['attrs']['categories'][0]['slug'] ?? '';

    // 今日のリスト
    if ( 'lotd' == $slug ) {
        set_transient( 'LF_BLOCK_LATESTPOSTS_LOTD', $block_content, WEEK_IN_SECONDS );

    // 新着リスト
    } elseif ( 'list' == $slug ) {
        set_transient( 'LF_BLOCK_LATESTPOSTS_LIST', $block_content, WEEK_IN_SECONDS );
    }

    return $block_content;
}

add_action( 'transition_post_status', 'lf_post_status', 20, 3 );

function lf_post_status( $new_status, $old_status, $post ) {



    // （投稿タイプ、カテゴリ、投稿ステータスなどで絞り込む）

    delete_transient( 'LF_BLOCK_LATESTPOSTS_LIST' );

}