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 * @since 5.8.0
12 *
13 * @param array $attributes The block attributes.
14 * @param string $content The block content.
15 *
16 * @return string Returns the block content.
17 */
18function render_block_core_file( $attributes, $content ) {
19 if ( empty( $attributes['displayPreview'] ) ) {
20 return $content;
21 }
22
23 // If it's interactive, enqueue the script module and add the directives.
24 wp_enqueue_script_module( '@wordpress/block-library/file/view' );
25
26 $processor = new WP_HTML_Tag_Processor( $content );
27 if ( $processor->next_tag() ) {
28 $processor->set_attribute( 'data-wp-interactive', 'core/file' );
29 }
30
31 // If there are no OBJECT elements, something might have already modified the block.
32 if ( ! $processor->next_tag( 'OBJECT' ) ) {
33 return $content;
34 }
35
36 $processor->set_attribute( 'data-wp-bind--hidden', '!state.hasPdfPreview' );
37 $processor->set_attribute( 'hidden', true );
38
39 $filename = $processor->get_attribute( 'aria-label' );
40 $has_filename = is_string( $filename ) && ! empty( $filename ) && 'PDF embed' !== $filename;
41 $label = $has_filename ? sprintf(
42 /* translators: %s: filename. */
43 __( 'Embed of %s.' ),
44 $filename
45 ) : __( 'PDF embed' );
46
47 // Update object's aria-label attribute if present in block HTML.
48 // Match an aria-label attribute from an object tag.
49 $processor->set_attribute( 'aria-label', $label );
50
51 return $processor->get_updated_html();
52}
53
54/**
55 * Registers the `core/file` block on server.
56 *
57 * @since 5.8.0
58 */
59function register_block_core_file() {
60 register_block_type_from_metadata(
61 __DIR__ . '/file',
62 array(
63 'render_callback' => 'render_block_core_file',
64 )
65 );
66}
67add_action( 'init', 'register_block_core_file' );
68