feat: resubmit property for configuration lifecycle (#59)

Author: erodewald

lib/smart-app.js

@@ -271,6 +271,10 @@ module.exports = class SmartApp {
 
 				case 'CONFIGURATION': {
 					const {configurationData} = evt
+
+					// Inject whether or not the request was a resubmitted page
+					configurationData.isResubmit = configurationData.pageId === configurationData.previousPageId
+
 					switch (configurationData.phase) {
 						case 'INITIALIZE': {
 							this._log.event(evt, configurationData.phase)