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Add Block Hooks (a.k.a. Auto-inserting Blocks) #5157

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Add Block Hooks (a.k.a. Auto-inserting Blocks) #5157

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b926b86
Add callback arg to serialize_blocks
ockham Sep 6, 2023
017929d
Inject theme attribute during serialization
ockham Sep 6, 2023
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24 changes: 23 additions & 1 deletion src/wp-includes/block-template-utils.php
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Original file line number Diff line number Diff line change
Expand Up @@ -513,6 +513,26 @@ function _inject_theme_attribute_in_block_template_content( $template_content )
return $template_content;
}

/**
* Injects the active theme's stylesheet as a `theme` attribute
* into a given template part block.
*
* @since 6.4.0
* @access private
*
* @param array $block a parsed block.
* @return array Updated block.
*/
function _inject_theme_attribute_in_block_template_block( $block ) {
if (
'core/template-part' === $block['blockName'] &&
! isset( $block['attrs']['theme'] )
) {
$block['attrs']['theme'] = get_stylesheet();
}
return $block;
}

/**
* Parses a block template and removes the theme attribute from each template part.
*
Expand Down Expand Up @@ -565,7 +585,6 @@ function _build_block_template_result_from_file( $template_file, $template_type
$template = new WP_Block_Template();
$template->id = $theme . '//' . $template_file['slug'];
$template->theme = $theme;
$template->content = _inject_theme_attribute_in_block_template_content( $template_content );
$template->slug = $template_file['slug'];
$template->source = 'theme';
$template->type = $template_type;
Expand All @@ -589,6 +608,9 @@ function _build_block_template_result_from_file( $template_file, $template_type
$template->area = $template_file['area'];
}

$blocks = parse_blocks( $template_content );
$template->content = serialize_blocks( $blocks, '_inject_theme_attribute_in_block_template_block' );

return $template;
}

Expand Down
10 changes: 8 additions & 2 deletions src/wp-includes/blocks.php
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Original file line number Diff line number Diff line change
Expand Up @@ -794,16 +794,22 @@ function get_comment_delimited_block_content( $block_name, $block_attributes, $b
* instead preserve the markup as parsed.
*
* @since 5.3.1
* @since 6.4.0 The `$callback` parameter was added.
*
* @param array $block A representative array of a single parsed block object. See WP_Block_Parser_Block.
* @param string $callback Optional. Callback to run on the block before serialization.
* @return string String of rendered HTML.
*/
function serialize_block( $block ) {
function serialize_block( $block, $callback = null ) {
if ( is_callable( $callback ) ) {
$block = call_user_func( $callback, $block );
}

$block_content = '';

$index = 0;
foreach ( $block['innerContent'] as $chunk ) {
$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ] );
$block_content .= is_string( $chunk ) ? $chunk : serialize_block( $block['innerBlocks'][ $index++ ], $callback );
}

if ( ! is_array( $block['attrs'] ) ) {
Expand Down