Added cache and filters for wc-customer get operations.

includes/admin/reports/class-wc-report-customer-list.php

@@ -62,6 +62,7 @@ class WC_Report_Customer_List extends WP_List_Table {
 
 			delete_user_meta( $user_id, '_money_spent' );
 			delete_user_meta( $user_id, '_order_count' );
+			delete_user_meta( $user_id, '_last_order' );
 			/* translators: User display name */
 			echo '<div class="updated"><p>' . sprintf( esc_html__( 'Refreshed stats for %s', 'woocommerce' ), esc_html( $user->display_name ) ) . '</p></div>';
 		}

includes/class-wc-post-data.php

@@ -406,8 +406,9 @@ class WC_Post_Data {
 					$customer->save();
 				}
 
-				// Delete order count meta.
+				// Delete order count and last order meta.
 				delete_user_meta( $customer_id, '_order_count' );
+				delete_user_meta( $customer_id, '_last_order' );
 			}
 
 			// Clean up items.

includes/data-stores/class-wc-customer-data-store.php

@@ -324,22 +324,31 @@ class WC_Customer_Data_Store extends WC_Data_Store_WP implements WC_Customer_Dat
 	 * @return WC_Order|false
 	 */
 	public function get_last_order( &$customer ) {
-		global $wpdb;
-
-		$last_order = $wpdb->get_var(
-			// phpcs:disable WordPress.DB.PreparedSQL.NotPrepared
-			"SELECT posts.ID
-			FROM $wpdb->posts AS posts
-			LEFT JOIN {$wpdb->postmeta} AS meta on posts.ID = meta.post_id
-			WHERE meta.meta_key = '_customer_user'
-			AND   meta.meta_value = '" . esc_sql( $customer->get_id() ) . "'
-			AND   posts.post_type = 'shop_order'
-			AND   posts.post_status IN ( '" . implode( "','", array_map( 'esc_sql', array_keys( wc_get_order_statuses() ) ) ) . "' )
-			ORDER BY posts.ID DESC"
-			// phpcs:enable
+		$last_order = apply_filters(
+			'woocommerce_customer_get_last_order',
+			get_user_meta( $customer->get_id(), '_last_order', true ),
+			$customer
 		);
 
-		if ( ! $last_order ) {
+		if ( '' === $last_order ) {
+			global $wpdb;
+
+			$last_order = $wpdb->get_var(
+				// phpcs:disable WordPress.DB.PreparedSQL.NotPrepared
+				"SELECT posts.ID
+				FROM $wpdb->posts AS posts
+				LEFT JOIN {$wpdb->postmeta} AS meta on posts.ID = meta.post_id
+				WHERE meta.meta_key = '_customer_user'
+				AND   meta.meta_value = '" . esc_sql( $customer->get_id() ) . "'
+				AND   posts.post_type = 'shop_order'
+				AND   posts.post_status IN ( '" . implode( "','", array_map( 'esc_sql', array_keys( wc_get_order_statuses() ) ) ) . "' )
+				ORDER BY posts.ID DESC"
+				// phpcs:enable
+			);
+			update_user_meta( $customer->get_id(), '_last_order', $last_order );
+		}
+
+		if ( ! $last_order || '' === $last_order ) {
 			return false;
 		}
 
@@ -354,7 +363,11 @@ class WC_Customer_Data_Store extends WC_Data_Store_WP implements WC_Customer_Dat
 	 * @return integer
 	 */
 	public function get_order_count( &$customer ) {
-		$count = get_user_meta( $customer->get_id(), '_order_count', true );
+		$count = apply_filters(
+			'woocommerce_customer_get_order_count',
+			get_user_meta( $customer->get_id(), '_order_count', true ),
+			$customer
+		);
 
 		if ( '' === $count ) {
 			global $wpdb;

includes/wc-order-functions.php

@@ -461,6 +461,7 @@ function wc_delete_shop_order_transients( $order = 0 ) {
 		$order_id = $order->get_id();
 		delete_user_meta( $order->get_customer_id(), '_money_spent' );
 		delete_user_meta( $order->get_customer_id(), '_order_count' );
+		delete_user_meta( $order->get_customer_id(), '_last_order' );
 	} else {
 		$order_id = 0;
 	}

includes/wc-update-functions.php

@@ -701,6 +701,7 @@ function wc_update_230_options() {
 	// _money_spent and _order_count may be out of sync - clear them
 	delete_metadata( 'user', 0, '_money_spent', '', true );
 	delete_metadata( 'user', 0, '_order_count', '', true );
+	delete_metadata( 'user', 0, '_last_order', '', true );
 
 	// To prevent taxes being hidden when using a default 'no address' in a store with tax inc prices, set the woocommerce_default_customer_address to use the store base address by default.
 	if ( '' === get_option( 'woocommerce_default_customer_address', false ) && wc_prices_include_tax() ) {