n8n/packages/nodes-base/nodes/WorkflowTrigger/WorkflowTrigger.node.ts

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import { ITriggerFunctions } from 'n8n-core';
import {
INodeType,
INodeTypeDescription,
ITriggerResponse,
} from 'n8n-workflow';
type eventType = 'Workflow activated' | 'Workflow updated' | undefined;
type activationType = 'activate' | 'update';
export class WorkflowTrigger implements INodeType {
description: INodeTypeDescription = {
displayName: 'Workflow Trigger',
name: 'workflowTrigger',
icon: 'fa:network-wired',
group: ['trigger'],
version: 1,
description: 'Triggers based on various lifecycle events, like when a workflow is activated',
defaults: {
name: 'Workflow Trigger',
color: '#ff6d5a',
},
inputs: [],
outputs: ['main'],
properties: [
{
displayName: 'Events',
name: 'events',
type: 'multiOptions',
required: true,
default: [],
description: 'Specifies under which conditions an execution should happen:<br />' +
'- <b>Active Workflow Updated</b>: Triggers when this workflow is updated<br />' +
'- <b>Workflow Activated</b>: Triggers when this workflow is activated',
options: [
{
name: 'Active Workflow Updated',
value: 'update',
description: 'Triggers when this workflow is updated',
},
{
name: 'Workflow Activated',
value: 'activate',
description: 'Triggers when this workflow is activated',
},
],
},
],
};
async trigger(this: ITriggerFunctions): Promise<ITriggerResponse> {
const events = this.getNodeParameter('events', []) as activationType[];
const activationMode = this.getActivationMode() as activationType;
if (events.includes(activationMode)) {
let event: eventType;
if (activationMode === 'activate') {
event = 'Workflow activated';
}
if (activationMode === 'update') {
event = 'Workflow updated';
}
this.emit([
this.helpers.returnJsonArray([
{ event, timestamp: (new Date()).toISOString(), workflow_id: this.getWorkflow().id },
]),
]);
}
const self = this;
async function manualTriggerFunction() {
self.emit([self.helpers.returnJsonArray([{ event: 'Manual execution', timestamp: (new Date()).toISOString(), workflow_id: self.getWorkflow().id }])]);
}
return {
manualTriggerFunction,
};
}
}