import { readFile as fsReadFile } from 'fs/promises'; import { IExecuteFunctions } from 'n8n-core'; import { IExecuteWorkflowInfo, INodeExecutionData, INodeType, INodeTypeDescription, IWorkflowBase, NodeOperationError, } from 'n8n-workflow'; export class ExecuteWorkflow implements INodeType { description: INodeTypeDescription = { displayName: 'Execute Workflow', name: 'executeWorkflow', icon: 'fa:sign-in-alt', group: ['transform'], version: 1, subtitle: '={{"Workflow: " + $parameter["workflowId"]}}', description: 'Execute another workflow', defaults: { name: 'Execute Workflow', color: '#ff6d5a', }, inputs: ['main'], outputs: ['main'], properties: [ { displayName: 'Source', name: 'source', type: 'options', options: [ { name: 'Database', value: 'database', description: 'Load the workflow from the database by ID', }, { name: 'Local File', value: 'localFile', description: 'Load the workflow from a locally saved file', }, { name: 'Parameter', value: 'parameter', description: 'Load the workflow from a parameter', }, { name: 'URL', value: 'url', description: 'Load the workflow from an URL', }, ], default: 'database', description: 'Where to get the workflow to execute from', }, // ---------------------------------- // source:database // ---------------------------------- { displayName: 'Workflow ID', name: 'workflowId', type: 'string', displayOptions: { show: { source: ['database'], }, }, default: '', required: true, description: 'The workflow to execute', }, // ---------------------------------- // source:localFile // ---------------------------------- { displayName: 'Workflow Path', name: 'workflowPath', type: 'string', displayOptions: { show: { source: ['localFile'], }, }, default: '', placeholder: '/data/workflow.json', required: true, description: 'The path to local JSON workflow file to execute', }, // ---------------------------------- // source:parameter // ---------------------------------- { displayName: 'Workflow JSON', name: 'workflowJson', type: 'string', typeOptions: { editor: 'json', rows: 10, }, displayOptions: { show: { source: ['parameter'], }, }, default: '\n\n\n', required: true, description: 'The workflow JSON code to execute', }, // ---------------------------------- // source:url // ---------------------------------- { displayName: 'Workflow URL', name: 'workflowUrl', type: 'string', displayOptions: { show: { source: ['url'], }, }, default: '', placeholder: 'https://example.com/workflow.json', required: true, description: 'The URL from which to load the workflow from', }, { displayName: 'Any data you pass into this node will be output by the Execute Workflow Trigger. More info', name: 'executeWorkflowNotice', type: 'notice', default: '', }, ], }; async execute(this: IExecuteFunctions): Promise { const items = this.getInputData(); const source = this.getNodeParameter('source', 0) as string; const workflowInfo: IExecuteWorkflowInfo = {}; try { if (source === 'database') { // Read workflow from database workflowInfo.id = this.getNodeParameter('workflowId', 0) as string; } else if (source === 'localFile') { // Read workflow from filesystem const workflowPath = this.getNodeParameter('workflowPath', 0) as string; let workflowJson; try { workflowJson = await fsReadFile(workflowPath, { encoding: 'utf8' }); } catch (error) { if (error.code === 'ENOENT') { throw new NodeOperationError( this.getNode(), `The file "${workflowPath}" could not be found.`, ); } throw error; } workflowInfo.code = JSON.parse(workflowJson) as IWorkflowBase; } else if (source === 'parameter') { // Read workflow from parameter const workflowJson = this.getNodeParameter('workflowJson', 0) as string; workflowInfo.code = JSON.parse(workflowJson) as IWorkflowBase; } else if (source === 'url') { // Read workflow from url const workflowUrl = this.getNodeParameter('workflowUrl', 0) as string; const requestOptions = { headers: { accept: 'application/json,text/*;q=0.99', }, method: 'GET', uri: workflowUrl, json: true, gzip: true, }; const response = await this.helpers.request(requestOptions); workflowInfo.code = response; } const receivedData = await this.executeWorkflow(workflowInfo, items); return receivedData; } catch (error) { if (this.continueOnFail()) { return this.prepareOutputData([{ json: { error: error.message } }]); } throw error; } } }