<?php
/**
* Replaces pattern blocks with their content.
*
* @param array $blocks Array of blocks.
* @param array $inner_content Optional array of inner content.
* @return array Array of blocks with patterns replaced.
*/
function gutenberg_replace_pattern_blocks( $blocks, &$inner_content = null ) {
// Keep track of seen references to avoid infinite loops.
static $seen_refs = array();
$i = 0;
while ( $i < count( $blocks ) ) {
if ( 'core/pattern' === $blocks[ $i ]['blockName'] ) {
$slug = $blocks[ $i ]['attrs']['slug'];
if ( isset( $seen_refs[ $slug ] ) ) {
// Skip recursive patterns.
array_splice( $blocks, $i, 1 );
continue;
}
$registry = WP_Block_Patterns_Registry::get_instance();
$pattern = $registry->get_registered( $slug );
// Skip unknown patterns.
if ( ! $pattern ) {
++$i;
continue;
}
$blocks_to_insert = parse_blocks( $pattern['content'] );
$seen_refs[ $slug ] = true;
$blocks_to_insert = gutenberg_replace_pattern_blocks( $blocks_to_insert );
unset( $seen_refs[ $slug ] );
array_splice( $blocks, $i, 1, $blocks_to_insert );
// If we have inner content, we need to insert nulls in the
// inner content array, otherwise serialize_blocks will skip
// blocks.
if ( $inner_content ) {
$null_indices = array_keys( $inner_content, null, true );
$content_index = $null_indices[ $i ];
$nulls = array_fill( 0, count( $blocks_to_insert ), null );
array_splice( $inner_content, $content_index, 1, $nulls );
}
// Skip inserted blocks.
$i += count( $blocks_to_insert );
} else {
if ( ! empty( $blocks[ $i ]['innerBlocks'] ) ) {
$blocks[ $i ]['innerBlocks'] = gutenberg_replace_pattern_blocks(
$blocks[ $i ]['innerBlocks'],
$blocks[ $i ]['innerContent']
);
}
++$i;
}
}
return $blocks;
}
function gutenberg_replace_pattern_blocks_patterns_endpoint( $result, $server, $request ) {
if ( $request->get_route() !== '/wp/v2/block-patterns/patterns' ) {
return $result;
}
$data = $result->get_data();
foreach ( $data as $index => $pattern ) {
$blocks = parse_blocks( $pattern['content'] );
$blocks = gutenberg_replace_pattern_blocks( $blocks );
$data[ $index ]['content'] = serialize_blocks( $blocks );
}
$result->set_data( $data );
return $result;
}
// Similarly, for patterns, we can avoid the double parse here:
// https://github.com/WordPress/wordpress-develop/blob/02fb53498f1ce7e63d807b9bafc47a7dba19d169/src/wp-includes/class-wp-block-patterns-registry.php#L175
add_filter( 'rest_post_dispatch', 'gutenberg_replace_pattern_blocks_patterns_endpoint', 10, 3 );