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

204 lines
4.7 KiB
TypeScript

import {
readFile as fsReadFile,
} from 'fs';
import { promisify } from 'util';
const fsReadFileAsync = promisify(fsReadFile);
import { IExecuteFunctions } from 'n8n-core';
import {
INodeExecutionData,
INodeType,
INodeTypeDescription,
IExecuteWorkflowInfo,
IWorkflowBase,
} from 'n8n-workflow';
export class ExecuteWorkflow implements INodeType {
description: INodeTypeDescription = {
displayName: 'Execute Workflow',
name: 'executeWorkflow',
icon: 'fa:network-wired',
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: {
alwaysOpenEditWindow: true,
editor: 'code',
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.',
},
]
};
async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
const items = this.getInputData();
const source = this.getNodeParameter('source', 0) as string;
const workflowInfo: IExecuteWorkflowInfo = {};
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 fsReadFileAsync(workflowPath, { encoding: 'utf8' }) as string;
} catch (error) {
if (error.code === 'ENOENT') {
throw new Error(`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;
}
}