1 files changed, 84 insertions, 0 deletions
diff --git a/wp-includes/blocks/query-pagination-previous.php b/wp-includes/blocks/query-pagination-previous.php
new file mode 100644
index 0000000..fc1fee0
--- /dev/null
+++ b/wp-includes/blocks/query-pagination-previous.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * Server-side rendering of the `core/query-pagination-previous` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/query-pagination-previous` block on the server.
+ *
+ * @param array    $attributes Block attributes.
+ * @param string   $content    Block default content.
+ * @param WP_Block $block      Block instance.
+ *
+ * @return string Returns the previous posts link for the query.
+ */
+function render_block_core_query_pagination_previous( $attributes, $content, $block ) {
+	$page_key            = isset( $block->context['queryId'] ) ? 'query-' . $block->context['queryId'] . '-page' : 'query-page';
+	$enhanced_pagination = isset( $block->context['enhancedPagination'] ) && $block->context['enhancedPagination'];
+	$page                = empty( $_GET[ $page_key ] ) ? 1 : (int) $_GET[ $page_key ];
+
+	$wrapper_attributes = get_block_wrapper_attributes();
+	$show_label         = isset( $block->context['showLabel'] ) ? (bool) $block->context['showLabel'] : true;
+	$default_label      = __( 'Previous Page' );
+	$label_text         = isset( $attributes['label'] ) && ! empty( $attributes['label'] ) ? esc_html( $attributes['label'] ) : $default_label;
+	$label              = $show_label ? $label_text : '';
+	$pagination_arrow   = get_query_pagination_arrow( $block, false );
+	if ( ! $label ) {
+		$wrapper_attributes .= ' aria-label="' . $label_text . '"';
+	}
+	if ( $pagination_arrow ) {
+		$label = $pagination_arrow . $label;
+	}
+	$content = '';
+	// Check if the pagination is for Query that inherits the global context
+	// and handle appropriately.
+	if ( isset( $block->context['query']['inherit'] ) && $block->context['query']['inherit'] ) {
+		$filter_link_attributes = static function () use ( $wrapper_attributes ) {
+			return $wrapper_attributes;
+		};
+
+		add_filter( 'previous_posts_link_attributes', $filter_link_attributes );
+		$content = get_previous_posts_link( $label );
+		remove_filter( 'previous_posts_link_attributes', $filter_link_attributes );
+	} elseif ( 1 !== $page ) {
+		$content = sprintf(
+			'<a href="%1$s" %2$s>%3$s</a>',
+			esc_url( add_query_arg( $page_key, $page - 1 ) ),
+			$wrapper_attributes,
+			$label
+		);
+	}
+
+	if ( $enhanced_pagination && isset( $content ) ) {
+		$p = new WP_HTML_Tag_Processor( $content );
+		if ( $p->next_tag(
+			array(
+				'tag_name'   => 'a',
+				'class_name' => 'wp-block-query-pagination-previous',
+			)
+		) ) {
+			$p->set_attribute( 'data-wp-key', 'query-pagination-previous' );
+			$p->set_attribute( 'data-wp-on--click', 'actions.core.query.navigate' );
+			$p->set_attribute( 'data-wp-on--mouseenter', 'actions.core.query.prefetch' );
+			$p->set_attribute( 'data-wp-effect', 'effects.core.query.prefetch' );
+			$content = $p->get_updated_html();
+		}
+	}
+
+	return $content;
+}
+
+/**
+ * Registers the `core/query-pagination-previous` block on the server.
+ */
+function register_block_core_query_pagination_previous() {
+	register_block_type_from_metadata(
+		__DIR__ . '/query-pagination-previous',
+		array(
+			'render_callback' => 'render_block_core_query_pagination_previous',
+		)
+	);
+}
+add_action( 'init', 'register_block_core_query_pagination_previous' );