first commit

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

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+import type {
+	ITriggerFunctions,
+	INodeType,
+	INodeTypeDescription,
+	ITriggerResponse,
+	TriggerTime,
+} from 'n8n-workflow';
+import { NodeConnectionTypes, NodeHelpers, toCronExpression } from 'n8n-workflow';
+
+export class Cron implements INodeType {
+	description: INodeTypeDescription = {
+		displayName: 'Cron',
+		name: 'cron',
+		icon: 'fa:clock',
+		group: ['trigger', 'schedule'],
+		version: 1,
+		hidden: true,
+		description: 'Triggers the workflow at a specific time',
+		eventTriggerDescription: '',
+		activationMessage:
+			'Your cron trigger will now trigger executions on the schedule you have defined.',
+		defaults: {
+			name: 'Cron',
+			color: '#29a568',
+		},
+
+		inputs: [],
+		outputs: [NodeConnectionTypes.Main],
+		properties: [
+			{
+				displayName:
+					"This workflow will run on the schedule you define here once you publish it.<br><br>For testing, you can also trigger it manually: by going back to the canvas and clicking 'execute workflow'",
+				name: 'notice',
+				type: 'notice',
+				default: '',
+			},
+			{
+				displayName: 'Trigger Times',
+				name: 'triggerTimes',
+				type: 'fixedCollection',
+				typeOptions: {
+					multipleValues: true,
+					multipleValueButtonText: 'Add Time',
+				},
+				default: {},
+				description: 'Triggers for the workflow',
+				placeholder: 'Add Cron Time',
+				options: NodeHelpers.cronNodeOptions,
+			},
+		],
+	};
+
+	async trigger(this: ITriggerFunctions): Promise<ITriggerResponse> {
+		const triggerTimes = this.getNodeParameter('triggerTimes') as unknown as {
+			item: TriggerTime[];
+		};
+
+		// Get all the trigger times
+		const expressions = (triggerTimes.item || []).map(toCronExpression);
+
+		// The trigger function to execute when the cron-time got reached
+		// or when manually triggered
+		const executeTrigger = () => {
+			this.emit([this.helpers.returnJsonArray([{}])]);
+		};
+
+		// Register the cron-jobs
+		expressions.forEach((expression) => this.helpers.registerCron({ expression }, executeTrigger));
+
+		return {
+			manualTriggerFunction: async () => executeTrigger(),
+		};
+	}
+}