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Add a hasThumbnail pseudo-attribute to the wp:query block #111

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Add a hasThumbnail pseudo-attribute to the wp:query block #111

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2 changes: 1 addition & 1 deletion ...p-content/themes/wporg-news-2021/block-template-parts/front-page/people-of-wordpress.html
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Original file line number Diff line number Diff line change
@@ -1,4 +1,4 @@
<!-- wp:query {"query":{"perPage":5,"categoryIds":[25]},"tagName":"section","className":"front__people-of-wordpress","align":"full"} -->
<!-- wp:query {"query":{"perPage":5,"categoryIds":[25],"hasThumbnail":true},"tagName":"section","className":"front__people-of-wordpress","align":"full"} -->
<section class="front__people-of-wordpress alignfull">
<!-- wp:heading {"level":2} -->
<h2>People of WordPress</h2>
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32 changes: 32 additions & 0 deletions source/wp-content/themes/wporg-news-2021/functions.php
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,7 @@
add_filter( 'post_class', __NAMESPACE__ . '\specify_post_classes', 10, 3 );
add_filter( 'theme_file_path', __NAMESPACE__ . '\conditional_template_part', 10, 2 );
add_filter( 'render_block_data', __NAMESPACE__ . '\custom_query_block_attributes' );
add_action( 'pre_get_posts', __NAMESPACE__ . '\custom_query_parameters' );
add_filter( 'template_redirect', __NAMESPACE__ . '\jetpack_likes_workaround' );

/**
Expand Down Expand Up @@ -324,11 +325,42 @@ function custom_query_block_attributes( $parsed_block ) {
$parsed_block[ 'attrs' ][ 'query' ][ 'categoryIds' ] = [ $category->term_id ];
}
}

if ( isset( $parsed_block[ 'attrs' ][ 'query' ][ 'hasThumbnail' ] ) ) {
// Use the search parameter as a hack for passing through extra context to the custom_query_parameters filter.
// There's probably a better way to do this in general. Ideally the query block would support a hasThumbnail parameter natively.
$parsed_block[ 'attrs' ][ 'query' ][ 'search' ] .= ':query-has-thumbnail';
}
}

return $parsed_block;
}

/**
* Support additional pseudo-parameters passed to WP_Query from the wp:query block via custom_query_block_attributes.
*
* This is the WP_Query side of the code that lets us create extra parameters needed in some templates.
*
* @param array $query The WP_Query object.
*
* @return array
*/
function custom_query_parameters( $query ) {
// See https://wordpress.stackexchange.com/a/392915 for the idea
if ( $query->is_search() && false !== strpos( $query->get( 's' ), ':query-has-thumbnail' ) ) {
// Add a meta query to only include posts with thumbnails/featured images.
$query->set( 'meta_query', array(
array(
'key' => '_thumbnail_id',
'compare' => 'EXISTS',
)
) );

// Remove the special keyword from the search parameter.
$query->set( 's', str_replace( ':query-has-thumbnail', '', $query->get( 's' ) ) );
}
}

/**
* A Workaround to make Jetpack Likes work with FSE themes.
*
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