How to implement custom node that wait for User Action trigger in another app

General
1

Hi All,

I am trying to do POC n8n for a workflow process.

Let’s say there is a Web application for shipment creation. Once a shipment is created it has its own life cycle as mentioned below:

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image2964×1844 227 KB

  1. Shipment Request Creation
    In this step, a user fills out a form to create a request in a web application, and from the backend API service, I would like to trigger a workflow that contains Shipment Request Creation node. The trigger will have a JSON payload of a shipment request.

  2. Shipment update ERP
    Post the output of the previous node to the ERP system.

For this step, I could use the HTTP Request node.

Step 1 and Step 2 will happen immediately once the workflow is triggered.

  1. Vehicle Assignment
    In this step, a user fills vehicle details against a specific shipment request in a web application, and from the backend API service, I would like to trigger a workflow that contains Vehicle Assignment node. The trigger will have a JSON payload of a shipment request.

This step should get executed only when user action happens at other web applications and how to create a custom node which should wait for such trigger.

  1. Truck-In
    In this step, a user fills truck details during entry to the factory against a specific shipment request in a web application, and from the backend API service, I would like to trigger a workflow that contains Truck In node. The trigger will have a JSON payload of a shipment request.

This step should get executed only when user action happens at other web applications and how to create a custom node which should wait for such trigger.

  1. Truck Out
    In this step, a user fills truck details during exit from the factory against a specific shipment request in a web application, and from the backend API service, I would like to trigger a workflow that contains Truck Out node. The trigger will have a JSON payload of a shipment request.

This step should get executed only when user action happens at other web applications and how to create a custom node which should wait for such trigger.

  1. Shipment Provision to ERP
    Post the output of the previous node to the ERP system.

For this step, I could use the HTTP Request node and can execute it immediately after the previous node execution.

  1. Proof of Delivery
    In this step, a user fills delivery details against a specific shipment request in a web application, and from the backend API service, I would like to trigger a workflow that contains Proof of Delivery node. The trigger will have a JSON payload of a shipment request.

This step should get executed only when user action happens at other web applications and how to create a custom node which should wait for such trigger.

Vehicle Assignment, Truck-In, Truck Out, Proof of Delivery are needs to be wait nodes in a single workflow and should be able to trigger via HTTP requests from other applications.

Please refer to the attached image for understanding the flow.
Thanks Swapnil Satpathy

2

Hi, not really clear what you are asking here? Is it for advice on whether Node-RED can do this? Or how it might do it?

Again, not really clear I'm afraid. n8n is a different tool to Node-RED. Are you saying that you are wanting to reproduce an n8n flow in Node-RED as a proof of concept?

Incidentally, Node-RED could certainly handle the flows you have outlined. It has several methods of presenting forms to users and can trigger flows off the back of the user form submissions.

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