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Navigation Block: Recursively remove Navigation block’s from appearing inside Navigation block on front of site #46279

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merged 6 commits into from
Dec 2, 2022
Merged

Navigation Block: Recursively remove Navigation block’s from appearing inside Navigation block on front of site #46279

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761553b
Recursively remove Navigation block’s from appearing inside Navigatio…
getdave Dec 2, 2022
818d173
Fix lint
getdave Dec 2, 2022
3340b65
Use whitelist approach
getdave Dec 2, 2022
0bbffc9
add a dupliation warning comment
scruffian Dec 2, 2022
4ecc4a3
Update packages/block-library/src/navigation/index.php
scruffian Dec 2, 2022
662c0ac
pacify linter
scruffian Dec 2, 2022
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35 changes: 24 additions & 11 deletions packages/block-library/src/navigation/index.php
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Original file line number Diff line number Diff line change
Expand Up @@ -384,20 +384,31 @@ function block_core_navigation_get_most_recently_published_navigation() {
}

/**
* Filter out empty "null" blocks from the block list.
* 'parse_blocks' includes a null block with '\n\n' as the content when
* Recursively filter out blocks from the block list that are considered invalid inside Navigation.
* This list includes:
* - The Navigation block itself (results in recursion).
* - empty "null" blocks from the block list.
*
* Note: 'parse_blocks' includes a null block with '\n\n' as the content when
* it encounters whitespace. This is not a bug but rather how the parser
* is designed.
*
* @param array $parsed_blocks the parsed blocks to be normalized.
* @return array the normalized parsed blocks.
* @param array $parsed_blocks the parsed blocks to be filtered.
* @return array the filtered parsed blocks.
*/
function block_core_navigation_filter_out_empty_blocks( $parsed_blocks ) {
$filtered = array_filter(
function block_core_navigation_filter_out_invalid_blocks( $parsed_blocks ) {
$filtered = array_reduce(
$parsed_blocks,
function( $block ) {
return isset( $block['blockName'] );
}
function( $carry, $block ) {
if ( isset( $block['blockName'] ) && 'core/navigation' !== $block['blockName'] ) {
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Should we use an array of allowedBlocks here? There's this array.

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Updated...but is there any danger of breaking sites that might utilise 3rd party blocks here?

if ( $block['innerBlocks'] ) {
$block['innerBlocks'] = block_core_navigation_filter_out_invalid_blocks( $block['innerBlocks'] );
}
$carry[] = $block;
}
return $carry;
},
array()
);

// Reset keys.
Expand Down Expand Up @@ -437,7 +448,8 @@ function block_core_navigation_get_fallback_blocks() {

// Use the first non-empty Navigation as fallback if available.
if ( $navigation_post ) {
$maybe_fallback = block_core_navigation_filter_out_empty_blocks( parse_blocks( $navigation_post->post_content ) );

$maybe_fallback = block_core_navigation_filter_out_invalid_blocks( parse_blocks( $navigation_post->post_content ) );

// Normalizing blocks may result in an empty array of blocks if they were all `null` blocks.
// In this case default to the (Page List) fallback.
Expand Down Expand Up @@ -595,7 +607,8 @@ function render_block_core_navigation( $attributes, $content, $block ) {

// 'parse_blocks' includes a null block with '\n\n' as the content when
// it encounters whitespace. This code strips it.
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We should update this comment.

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Actually this comment is fine, now I read it more carefully.

$compacted_blocks = block_core_navigation_filter_out_empty_blocks( $parsed_blocks );
$compacted_blocks = block_core_navigation_filter_out_invalid_blocks( $parsed_blocks );


// TODO - this uses the full navigation block attributes for the
// context which could be refined.
Expand Down