1 <?php

     2 /**

     3  * Server-side rendering of the `core/file` block.

     4  *

     5  * @package WordPress

     6  */

     7 

     8 /**

     9  * When the `core/file` block is rendering, check if we need to enqueue the `'wp-block-file-view` script.

    10  *

    11  * @param array $attributes The block attributes.

    12  * @param array $content    The block content.

    13  *

    14  * @return string Returns the block content.

    15  */

    16 function render_block_core_file( $attributes, $content ) {

    17 	$should_load_view_script = ! empty( $attributes['displayPreview'] ) && ! wp_script_is( 'wp-block-file-view' );

    18 	if ( $should_load_view_script ) {

    19 		wp_enqueue_script( 'wp-block-file-view' );

    20 	}

    21 

    22 	return $content;

    23 }

    24 

    25 /**

    26  * Registers the `core/file` block on server.

    27  */

    28 function register_block_core_file() {

    29 	register_block_type_from_metadata(

    30 		__DIR__ . '/file',

    31 		array(

    32 			'render_callback' => 'render_block_core_file',

    33 		)

    34 	);

    35 }

    36 add_action( 'init', 'register_block_core_file' );