diff -r c7c34916027a -r 177826044cd9 wp/wp-includes/blocks/archives.php
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/blocks/archives.php	Mon Oct 14 18:28:13 2019 +0200
@@ -0,0 +1,147 @@
+<?php
+/**
+ * Server-side rendering of the `core/archives` block.
+ *
+ * @package WordPress
+ */
+
+/**
+ * Renders the `core/archives` block on server.
+ *
+ * @see WP_Widget_Archives
+ *
+ * @param array $attributes The block attributes.
+ *
+ * @return string Returns the post content with archives added.
+ */
+function render_block_core_archives( $attributes ) {
+	$show_post_count = ! empty( $attributes['showPostCounts'] );
+
+	$class = 'wp-block-archives';
+
+	if ( isset( $attributes['align'] ) ) {
+		$class .= " align{$attributes['align']}";
+	}
+
+	if ( isset( $attributes['className'] ) ) {
+		$class .= " {$attributes['className']}";
+	}
+
+	if ( ! empty( $attributes['displayAsDropdown'] ) ) {
+
+		$class .= ' wp-block-archives-dropdown';
+
+		$dropdown_id = esc_attr( uniqid( 'wp-block-archives-' ) );
+		$title       = __( 'Archives' );
+
+		/** This filter is documented in wp-includes/widgets/class-wp-widget-archives.php */
+		$dropdown_args = apply_filters(
+			'widget_archives_dropdown_args',
+			array(
+				'type'            => 'monthly',
+				'format'          => 'option',
+				'show_post_count' => $show_post_count,
+			)
+		);
+
+		$dropdown_args['echo'] = 0;
+
+		$archives = wp_get_archives( $dropdown_args );
+
+		switch ( $dropdown_args['type'] ) {
+			case 'yearly':
+				$label = __( 'Select Year' );
+				break;
+			case 'monthly':
+				$label = __( 'Select Month' );
+				break;
+			case 'daily':
+				$label = __( 'Select Day' );
+				break;
+			case 'weekly':
+				$label = __( 'Select Week' );
+				break;
+			default:
+				$label = __( 'Select Post' );
+				break;
+		}
+
+		$label = esc_attr( $label );
+
+		$block_content = '<label class="screen-reader-text" for="' . $dropdown_id . '">' . $title . '</label>
+	<select id="' . $dropdown_id . '" name="archive-dropdown" onchange="document.location.href=this.options[this.selectedIndex].value;">
+	<option value="">' . $label . '</option>' . $archives . '</select>';
+
+		$block_content = sprintf(
+			'<div class="%1$s">%2$s</div>',
+			esc_attr( $class ),
+			$block_content
+		);
+	} else {
+
+		$class .= ' wp-block-archives-list';
+
+		/** This filter is documented in wp-includes/widgets/class-wp-widget-archives.php */
+		$archives_args = apply_filters(
+			'widget_archives_args',
+			array(
+				'type'            => 'monthly',
+				'show_post_count' => $show_post_count,
+			)
+		);
+
+		$archives_args['echo'] = 0;
+
+		$archives = wp_get_archives( $archives_args );
+
+		$classnames = esc_attr( $class );
+
+		if ( empty( $archives ) ) {
+
+			$block_content = sprintf(
+				'<div class="%1$s">%2$s</div>',
+				$classnames,
+				__( 'No archives to show.' )
+			);
+		} else {
+
+			$block_content = sprintf(
+				'<ul class="%1$s">%2$s</ul>',
+				$classnames,
+				$archives
+			);
+		}
+	}
+
+	return $block_content;
+}
+
+/**
+ * Register archives block.
+ */
+function register_block_core_archives() {
+	register_block_type(
+		'core/archives',
+		array(
+			'attributes'      => array(
+				'align'             => array(
+					'type' => 'string',
+				),
+				'className'         => array(
+					'type' => 'string',
+				),
+				'displayAsDropdown' => array(
+					'type'    => 'boolean',
+					'default' => false,
+				),
+				'showPostCounts'    => array(
+					'type'    => 'boolean',
+					'default' => false,
+				),
+			),
+			'render_callback' => 'render_block_core_archives',
+		)
+	);
+}
+
+add_action( 'init', 'register_block_core_archives' );