Plugin: Guard construct_wp_query_args with check if implemented in WordPress Core

lib/compat/wordpress-5.8.php

@@ -0,0 +1,70 @@
+<?php
+/**
+ * Temporary compatibility shims for features present in Gutenberg.
+ * This file should be removed when WordPress 5.8.0 becomes the lowest
+ * supported version by this plugin.
+ *
+ * @package gutenberg
+ */
+
+if ( ! function_exists( 'construct_wp_query_args' ) ) {
+	/**
+	 * Helper function that constructs a WP_Query args array from
+	 * a `Query` block properties.
+	 *
+	 * It's used in QueryLoop, QueryPaginationNumbers and QueryPaginationNext blocks.
+	 *
+	 * @param WP_Block $block Block instance.
+	 * @param int      $page  Current query's page.
+	 *
+	 * @return array Returns the constructed WP_Query arguments.
+	 */
+	function construct_wp_query_args( $block, $page ) {
+		$query = array(
+			'post_type'    => 'post',
+			'order'        => 'DESC',
+			'orderby'      => 'date',
+			'post__not_in' => array(),
+		);
+
+		if ( isset( $block->context['query'] ) ) {
+			if ( isset( $block->context['query']['postType'] ) ) {
+				$query['post_type'] = $block->context['query']['postType'];
+			}
+			if ( isset( $block->context['query']['sticky'] ) && ! empty( $block->context['query']['sticky'] ) ) {
+				$sticky = get_option( 'sticky_posts' );
+				if ( 'only' === $block->context['query']['sticky'] ) {
+					$query['post__in'] = $sticky;
+				} else {
+					$query['post__not_in'] = array_merge( $query['post__not_in'], $sticky );
+				}
+			}
+			if ( isset( $block->context['query']['exclude'] ) ) {
+				$query['post__not_in'] = array_merge( $query['post__not_in'], $block->context['query']['exclude'] );
+			}
+			if ( isset( $block->context['query']['perPage'] ) ) {
+				$query['offset']         = ( $block->context['query']['perPage'] * ( $page - 1 ) ) + $block->context['query']['offset'];
+				$query['posts_per_page'] = $block->context['query']['perPage'];
+			}
+			if ( isset( $block->context['query']['categoryIds'] ) ) {
+				$query['category__in'] = $block->context['query']['categoryIds'];
+			}
+			if ( isset( $block->context['query']['tagIds'] ) ) {
+				$query['tag__in'] = $block->context['query']['tagIds'];
+			}
+			if ( isset( $block->context['query']['order'] ) ) {
+				$query['order'] = strtoupper( $block->context['query']['order'] );
+			}
+			if ( isset( $block->context['query']['orderBy'] ) ) {
+				$query['orderby'] = $block->context['query']['orderBy'];
+			}
+			if ( isset( $block->context['query']['author'] ) ) {
+				$query['author'] = $block->context['query']['author'];
+			}
+			if ( isset( $block->context['query']['search'] ) ) {
+				$query['s'] = $block->context['query']['search'];
+			}
+		}
+		return $query;
+	}
+}

lib/load.php

@@ -83,6 +83,7 @@ function gutenberg_is_experiment_enabled( $name ) {
 require_once __DIR__ . '/widgets-page.php';
 
 require __DIR__ . '/compat.php';
+require __DIR__ . '/compat/wordpress-5.8.php';
 require __DIR__ . '/utils.php';
 require __DIR__ . '/editor-settings.php';
 
@@ -120,7 +121,6 @@ function gutenberg_is_experiment_enabled( $name ) {
 require __DIR__ . '/navigation-page.php';
 require __DIR__ . '/experiments-page.php';
 require __DIR__ . '/global-styles.php';
-require __DIR__ . '/query-utils.php';
 
 require __DIR__ . '/block-supports/generated-classname.php';
 require __DIR__ . '/block-supports/colors.php';