fix(IF Node): Fix "Is Empty" and "Is Not Empty" operation fails for d…

…ate objects (#4670)

* IF node isEmtpy and IsNotEmpty operation: ignore empty date objects
* IF node isEmtpy and IsNotEmpty operation: treat invalid dates as empty

packages/nodes-base/nodes/If/If.node.ts

@@ -315,6 +315,9 @@ export class If implements INodeType {
 		let item: INodeExecutionData;
 		let combineOperation: string;
 
+		const isDateObject = (value: NodeParameterValue) => Object.prototype.toString.call(value) === '[object Date]';
+		const isDateInvalid = (value: NodeParameterValue) => value?.toString() === 'Invalid Date';
+
 		// The compare operations
 		const compareOperationFunctions: {
 			[key: string]: (value1: NodeParameterValue, value2: NodeParameterValue) => boolean;
@@ -347,15 +350,17 @@ export class If implements INodeType {
 				!(value1 as string).startsWith(value2 as string),
 			isEmpty: (value1: NodeParameterValue) =>
 				[undefined, null, '', NaN].includes(value1 as string) ||
-				(typeof value1 === 'object' && value1 !== null
+				(typeof value1 === 'object' && value1 !== null && !isDateObject(value1)
 					? Object.entries(value1 as string).length === 0
-					: false),
+					: false) ||
+				(isDateObject(value1) && isDateInvalid(value1)),
 			isNotEmpty: (value1: NodeParameterValue) =>
 				!(
 					[undefined, null, '', NaN].includes(value1 as string) ||
-					(typeof value1 === 'object' && value1 !== null
+					(typeof value1 === 'object' && value1 !== null && !isDateObject(value1)
 						? Object.entries(value1 as string).length === 0
-						: false)
+						: false) ||
+					(isDateObject(value1) && isDateInvalid(value1))
 				),
 			regex: (value1: NodeParameterValue, value2: NodeParameterValue) => {
 				const regexMatch = (value2 || '').toString().match(new RegExp('^/(.*?)/([gimusy]*)$'));