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* Given a Navigation block's inner blocks and its corresponding `wp_navigation` post object,

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* this function inserts hooked blocks into it, and returns the serialized inner blocks in a

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* mock Navigation block wrapper.

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* If there are any hooked blocks that need to be inserted as the Navigation block's first or last

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* children, the `wp_navigation` post's `_wp_ignored_hooked_blocks` meta is checked to see if any

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* of those hooked blocks should be exempted from insertion.

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* @since 6.5.0

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* @param array $inner_blocks Parsed inner blocks of a Navigation block.

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* @param WP_Post $post `wp_navigation` post object corresponding to the block.

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* @return string Serialized inner blocks in mock Navigation block wrapper, with hooked blocks inserted, if any.

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function block_core_navigation_insert_hooked_blocks( $inner_blocks, $post ) {

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$mock_navigation_block = block_core_navigation_mock_parsed_block( $inner_blocks, $post );

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$hooked_blocks = get_hooked_blocks();

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$before_block_visitor = null;

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$after_block_visitor = null;

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if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {

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$before_block_visitor = make_before_block_visitor( $hooked_blocks, $post, 'insert_hooked_blocks' );

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$after_block_visitor = make_after_block_visitor( $hooked_blocks, $post, 'insert_hooked_blocks' );

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}

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return traverse_and_serialize_block( $mock_navigation_block, $before_block_visitor, $after_block_visitor );

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}

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/**

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* Insert ignoredHookedBlocks meta into the Navigation block and its inner blocks.

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* Given a Navigation block's inner blocks and its corresponding `wp_navigation` post object,

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* this function inserts ignoredHookedBlocks meta into it, and returns the serialized inner blocks in a

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* mock Navigation block wrapper.

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* @since 6.5.0

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* @param array $inner_blocks Parsed inner blocks of a Navigation block.

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* @param WP_Post $post `wp_navigation` post object corresponding to the block.

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* @return string Serialized inner blocks in mock Navigation block wrapper, with hooked blocks inserted, if any.

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function block_core_navigation_set_ignored_hooked_blocks_metadata( $inner_blocks, $post ) {

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$mock_navigation_block = block_core_navigation_mock_parsed_block( $inner_blocks, $post );

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$hooked_blocks = get_hooked_blocks();

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$before_block_visitor = null;

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$after_block_visitor = null;

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if ( ! empty( $hooked_blocks ) || has_filter( 'hooked_block_types' ) ) {

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$before_block_visitor = make_before_block_visitor( $hooked_blocks, $post, 'set_ignored_hooked_blocks_metadata' );

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$after_block_visitor = make_after_block_visitor( $hooked_blocks, $post, 'set_ignored_hooked_blocks_metadata' );

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}

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return traverse_and_serialize_block( $mock_navigation_block, $before_block_visitor, $after_block_visitor );

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}

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/**

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* Updates the post meta with the list of ignored hooked blocks when the navigation is created or updated via the REST API.

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* @access private

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* @since 6.5.0

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* @param stdClass $post Post object.

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* @return stdClass The updated post object.

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function block_core_navigation_update_ignore_hooked_blocks_meta( $post ) {

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* In this scenario the user has likely tried to create a navigation via the REST API.

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* In which case we won't have a post ID to work with and store meta against.

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if ( empty( $post->ID ) ) {

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return $post;

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}

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/**

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* Skip meta generation when consumers intentionally update specific Navigation fields

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* and omit the content update.

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if ( ! isset( $post->post_content ) ) {

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return $post;

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}

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* We run the Block Hooks mechanism to inject the `metadata.ignoredHookedBlocks` attribute into

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* all anchor blocks. For the root level, we create a mock Navigation and extract them from there.

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$blocks = parse_blocks( $post->post_content );

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* Block Hooks logic requires a `WP_Post` object (rather than the `stdClass` with the updates that

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* we're getting from the `rest_pre_insert_wp_navigation` filter) as its second argument (to be

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* used as context for hooked blocks insertion).

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* We thus have to look it up from the DB,based on `$post->ID`.

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$markup = block_core_navigation_set_ignored_hooked_blocks_metadata( $blocks, get_post( $post->ID ) );

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$root_nav_block = parse_blocks( $markup )[0];

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$ignored_hooked_blocks = isset( $root_nav_block['attrs']['metadata']['ignoredHookedBlocks'] )

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? $root_nav_block['attrs']['metadata']['ignoredHookedBlocks']

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: array();

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if ( ! empty( $ignored_hooked_blocks ) ) {

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$existing_ignored_hooked_blocks = get_post_meta( $post->ID, '_wp_ignored_hooked_blocks', true );

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if ( ! empty( $existing_ignored_hooked_blocks ) ) {

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$existing_ignored_hooked_blocks = json_decode( $existing_ignored_hooked_blocks, true );

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$ignored_hooked_blocks = array_unique( array_merge( $ignored_hooked_blocks, $existing_ignored_hooked_blocks ) );

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}

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update_post_meta( $post->ID, '_wp_ignored_hooked_blocks', json_encode( $ignored_hooked_blocks ) );

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}

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$post->post_content = block_core_navigation_remove_serialized_parent_block( $markup );

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return $post;

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}

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* Before adding our filter, we verify if it's already added in Core.

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* However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".

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* Therefore, we concatenate the Core's function name to circumvent this prefix for our check.

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$rest_insert_wp_navigation_core_callback = 'block_core_navigation_' . 'update_ignore_hooked_blocks_meta'; // phpcs:ignore Generic.Strings.UnnecessaryStringConcat.Found

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* Do not add the `block_core_navigation_update_ignore_hooked_blocks_meta` filter in the following cases:

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* - If Core has added the `update_ignored_hooked_blocks_postmeta` filter already (WP >= 6.6);

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* - or if the `set_ignored_hooked_blocks_metadata` function is unavailable (which is required for the filter to work. It was introduced by WP 6.5 but is not present in Gutenberg's WP 6.5 compatibility layer);

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* - or if the `$rest_insert_wp_navigation_core_callback` filter has already been added.

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if (

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! has_filter( 'rest_pre_insert_wp_navigation', 'update_ignored_hooked_blocks_postmeta' ) &&

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function_exists( 'set_ignored_hooked_blocks_metadata' ) &&

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! has_filter( 'rest_pre_insert_wp_navigation', $rest_insert_wp_navigation_core_callback )

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) {

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add_filter( 'rest_pre_insert_wp_navigation', 'block_core_navigation_update_ignore_hooked_blocks_meta' );

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}

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* Previous versions of Gutenberg were attaching the block_core_navigation_update_ignore_hooked_blocks_meta

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* function to the `rest_insert_wp_navigation` _action_ (rather than the `rest_pre_insert_wp_navigation` _filter_).

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* To avoid collisions, we need to remove the filter from that action if it's present.

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if ( has_filter( 'rest_insert_wp_navigation', $rest_insert_wp_navigation_core_callback ) ) {

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remove_filter( 'rest_insert_wp_navigation', $rest_insert_wp_navigation_core_callback );

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}

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/**

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* Hooks into the REST API response for the core/navigation block and adds the first and last inner blocks.

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* @since 6.5.0

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* @param WP_REST_Response $response The response object.

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* @param WP_Post $post Post object.

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* @return WP_REST_Response The response object.

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function block_core_navigation_insert_hooked_blocks_into_rest_response( $response, $post ) {

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if ( ! isset( $response->data['content']['raw'] ) || ! isset( $response->data['content']['rendered'] ) ) {

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return $response;

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}

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$parsed_blocks = parse_blocks( $response->data['content']['raw'] );

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$content = block_core_navigation_insert_hooked_blocks( $parsed_blocks, $post );

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// Remove mock Navigation block wrapper.

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$content = block_core_navigation_remove_serialized_parent_block( $content );

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$response->data['content']['raw'] = $content;

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/** This filter is documented in wp-includes/post-template.php */

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$response->data['content']['rendered'] = apply_filters( 'the_content', $content );

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return $response;

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}

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* Before adding our filter, we verify if it's already added in Core.

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* However, during the build process, Gutenberg automatically prefixes our functions with "gutenberg_".

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* Therefore, we concatenate the Core's function name to circumvent this prefix for our check.

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$rest_prepare_wp_navigation_core_callback = 'block_core_navigation_' . 'insert_hooked_blocks_into_rest_response';

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* Do not add the `block_core_navigation_insert_hooked_blocks_into_rest_response` filter in the following cases:

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* - If Core has added the `insert_hooked_blocks_into_rest_response` filter already (WP >= 6.6);

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* - or if the `$rest_prepare_wp_navigation_core_callback` filter has already been added.

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if (

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! has_filter( 'rest_prepare_wp_navigation', 'insert_hooked_blocks_into_rest_response' ) &&

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function_exists( 'set_ignored_hooked_blocks_metadata' ) &&

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! has_filter( 'rest_prepare_wp_navigation', $rest_prepare_wp_navigation_core_callback )

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) {

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add_filter( 'rest_prepare_wp_navigation', 'block_core_navigation_insert_hooked_blocks_into_rest_response', 10, 3 );

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}

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