feat add to date operator

packages/nodes-base/nodes/DateTime/V2/AddToDateDescription.ts

@@ -0,0 +1,105 @@
+import type { INodeProperties } from 'n8n-workflow';
+
+export const AddToDateDescription: INodeProperties[] = [
+	{
+		displayName:
+			"You can also do this using an expression, e.g. {{ your_date.plus(5, 'minutes') }}. More info",
+		name: 'notice',
+		type: 'notice',
+		default: '',
+		displayOptions: {
+			show: {
+				operation: ['addToDate'],
+			},
+		},
+	},
+	{
+		displayName: 'Date to Add To',
+		name: 'addToDate',
+		type: 'string',
+		description: 'The date that you want to change',
+		default: '',
+		displayOptions: {
+			show: {
+				operation: ['addToDate'],
+			},
+		},
+		required: true,
+	},
+	{
+		displayName: 'Time Unit to Add',
+		name: 'timeUnit',
+		description: 'Time unit for Duration parameter above',
+		displayOptions: {
+			show: {
+				operation: ['addToDate'],
+			},
+		},
+		type: 'options',
+		// eslint-disable-next-line n8n-nodes-base/node-param-options-type-unsorted-items
+		options: [
+			{
+				name: 'Quarters',
+				value: 'quarters',
+			},
+			{
+				name: 'Years',
+				value: 'years',
+			},
+			{
+				name: 'Months',
+				value: 'months',
+			},
+			{
+				name: 'Weeks',
+				value: 'weeks',
+			},
+			{
+				name: 'Days',
+				value: 'days',
+			},
+			{
+				name: 'Hours',
+				value: 'hours',
+			},
+			{
+				name: 'Minutes',
+				value: 'minutes',
+			},
+			{
+				name: 'Seconds',
+				value: 'seconds',
+			},
+			{
+				name: 'Milliseconds',
+				value: 'milliseconds',
+			},
+		],
+		default: 'days',
+		required: true,
+	},
+	{
+		displayName: 'Duration',
+		name: 'duration',
+		type: 'number',
+		description: 'The number of time units to add to the date',
+		default: 0,
+		displayOptions: {
+			show: {
+				operation: ['addToDate'],
+			},
+		},
+	},
+	{
+		displayName: 'Output Field Name',
+		name: 'outputFieldName',
+		type: 'string',
+		default: 'new_date',
+		description: 'Name of the field to put the output in',
+		displayOptions: {
+			show: {
+				operation: ['addToDate'],
+			},
+		},
+	},
+];

packages/nodes-base/nodes/DateTime/V2/DateTimeV2.node.ts

@@ -8,6 +8,7 @@ import type {
 	INodeTypeBaseDescription,
 	INodeTypeDescription,
 } from 'n8n-workflow';
+import { NodeOperationError } from 'n8n-workflow';
 
 import moment from 'moment-timezone';
 import { CurrentDateDescription } from './CurrentDateDescription';
@@ -95,6 +96,7 @@ export class DateTimeV2 implements INodeType {
 		const responseData = [];
 		const operation = this.getNodeParameter('operation', 0);
 		const workflowTimezone = this.getTimezone();
+
 		for (let i = 0; i < items.length; i++) {
 			if (operation === 'getCurrentDate') {
 				const includeTime = this.getNodeParameter('includeTime', i) as boolean;
@@ -105,6 +107,21 @@ export class DateTimeV2 implements INodeType {
 						: { [outputFieldName]: moment().startOf('day').tz(workflowTimezone) },
 				);
 			} else if (operation === 'addToDate') {
+				const addToDate = this.getNodeParameter('addToDate', i) as string;
+				const timeUnit = this.getNodeParameter('timeUnit', i) as string;
+				const duration = this.getNodeParameter('duration', i) as number;
+				const outputFieldName = this.getNodeParameter('outputFieldName', i) as string;
+				try {
+					const dateToAdd = moment.tz(addToDate, workflowTimezone);
+					const returnedDate = moment(dateToAdd).add(
+						duration,
+						timeUnit as moment.unitOfTime.DurationConstructor,
+					);
+					console.log(returnedDate);
+					responseData.push({ [outputFieldName]: returnedDate });
+				} catch {
+					throw new NodeOperationError(this.getNode(), 'Invalid date format');
+				}
 			}
 			const executionData = this.helpers.constructExecutionMetaData(
 				this.helpers.returnJsonArray(responseData as IDataObject[]),