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Navigation block: Check Block Hooks API callback hasn't already been added. #58772

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14 changes: 12 additions & 2 deletions packages/block-library/src/navigation/index.php
Original file line number Diff line number Diff line change
Expand Up @@ -1440,9 +1440,14 @@ function block_core_navigation_update_ignore_hooked_blocks_meta( $post ) {
}
}

// Before adding our filter, we verify if it's already added in Core.
// However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".
// Therefore, we concatenate the Core's function name to circumvent this prefix for our check.
$rest_insert_wp_navigation_core_callback = 'block_core_navigation_' . 'update_ignore_hooked_blocks_meta';

// Injection of hooked blocks into the Navigation block relies on some functions present in WP >= 6.5
// that are not present in Gutenberg's WP 6.5 compatibility layer.
if ( function_exists( 'get_hooked_block_markup' ) ) {
if ( function_exists( 'get_hooked_block_markup' ) && ! has_filter( 'rest_insert_wp_navigation', $rest_insert_wp_navigation_core_callback ) ) {
add_action( 'rest_insert_wp_navigation', 'block_core_navigation_update_ignore_hooked_blocks_meta', 10, 3 );
}

Expand Down Expand Up @@ -1472,8 +1477,13 @@ function block_core_navigation_insert_hooked_blocks_into_rest_response( $respons
return $response;
}

// Before adding our filter, we verify if it's already added in Core.
// However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".
// Therefore, we concatenate the Core's function name to circumvent this prefix for our check.
$rest_prepare_wp_navigation_core_callback = 'block_core_navigation_' . 'insert_hooked_blocks_into_rest_response';

// Injection of hooked blocks into the Navigation block relies on some functions present in WP >= 6.5
// that are not present in Gutenberg's WP 6.5 compatibility layer.
if ( function_exists( 'get_hooked_block_markup' ) ) {
if ( function_exists( 'get_hooked_block_markup' ) && ! has_filter( 'rest_prepare_wp_navigation', $rest_prepare_wp_navigation_core_callback ) ) {
add_filter( 'rest_prepare_wp_navigation', 'block_core_navigation_insert_hooked_blocks_into_rest_response', 10, 3 );
}
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