WORKERBASE Backend challenge

Welcome to the WORKERBASE live-coding challenge. This is a challenge in which you need to implement two simple endpoints and a module we call "Rule Engine". It is a module that executes certain actions by being triggered by certain events with certain conditions:

Prerequisites

In order to complete the task you will need the following:

• code editor of your choice
• NodeJs installed on your machine
• Postman installed on your machine

The challenge

The tasks of the challenge are:

• create a Rule model
• to implement API endpoint for Rule creation
• to implement an endpoint for the Rule webhook
• to implement the RuleEngine service
• to set up the test case (see Test Case chapter)

Data structure

The data structure you'll be working with is the following:

Please note that the User model is already implemented and the RuleCondition interface may be also found in src/interfaces/RuleCondition.ts

Requirements

• using Typescript is a must

Quick start

We prepared the starter project for you that contains a database connection, CRUD endpoints for a User, and Mqtt service.

How to run:

• copy .env.development file into .env

• run npm install to install the dependencies

• run npm run build to build the project

• run npm start to build and start the project or

• run npm run watch to start in dev mode and watch "src" folder

Success

After completing the task, you should be able to create the following test case:

• create a user via API and get and user's id (See payload in Payload section)
• create a "Rule 1" via API
• create a "Rule 2" via API
• trigger "Rule 1" by requesting Rule Webhook API (See payload in Payload section)

Expected result: the message is sent to workerbase/tasks/init (See payload in Payload section)

Payloads

1. Create a User:

const UserCreatePaylaod = {
	name: <user's name>,
	email: <user's email>,
	roles: [Roles.MAINTENANCE],
}

2. Trigger a rule webhook:

const RuleWebhookPayload = {
	userId: <userId>,
	priority: 4
}

3. Send task init message via MQTT:

const MqttTaskInitPayload = {
	title: "Title",
	headline: "Headline",
	description: "Description",
}

Good luck 🤞