Xmartlabs Node.js Template

This project contains Xmartlabs' Node.js template.

Contributing to this Template

Make sure you have the appropriate version of Node (20.9.0) installed.

Then install the required packages:

npm install

To run tests you'll need to create a .env.test file. You can simply copy the example file (.env.example) and rename it. You can check config.ts file for valid values. Before using the command to run the test, you'll need to start the docker container for the database use for testing, you can do this by using the command:

docker-compose up db-testing

Tests are run using the typical command:

npm test

---

Project Setup

• Install Node 20.9.0 (as documented on .node-version)
• Install the appropriate version of npm: npm i -g [email protected]
• Install packages with npm install
• Create a new .env file using the .env.example as an example. for that run $ cp .env.example .env.
• Set the variables in the new environment file .env you created above.
• Start the redis container with docker-compose up redis-server
• Start the project with npm start

Project structure

• .github - GitHub Actions config files.
• .vs_code - Visual Studio Code sdebugger config.
• build - Generated with tsoa specs-and-routes. This is where it generates the routes and controllers documentation. Needed to run the code and generated on npm start and npm test. Added on .gitignore.
• node_modules - Contains all the dependencies. Generated with npm install. Added on .gitignore.
• prisma - Prisma migrations and schema. This is where all database changes should be made.
• src - Has the following structure:
  • config - Contains app envs, logging and error handling config.
  • controllers - Contains all the controllers.
  • middlewares - Contains auth, error handling,logging and security middlewares.
  • queue - Contains all queues. This is used to add tasks for the workers to pick up.
  • routes - Contains index and /docs routes. Remember that all controller routes are generated by tsoa
  • services - Contains all the services.
  • tests - Contains tests setup and utils.
  • types - Contains all the TS types and interfaces (except the ones generated by prisma client).
  • utils - Contains all the utils.
• worker - Contains all the workers that will run in another process.

Prisma ORM

Prisma is a next-generation ORM for Node.js. prisma client - Auto-generated and type-safe query builder for Node.js & TypeScript. prisma migrate - Prisma migration system. Requeriments:

• set a DATABASE_URL on .env - The format is specified in .env.example
• Running database: There's a docker-compose file example: docker-compose up -d
• Run database migrations: npx prisma migrate dev

If you want to change the database schema, you just have to change the prisma/schema.prisma file and generate a new migration with npx prisma migrate dev --name migration_name

TSOA - Swagger docs and routes generation

TSOA is a framework with integrated OpenAPI compiler to build Node.js serve-side applications using TypeScript. It allows you to generate Swagger documentation and routes for your API.

Generating Routes and Specs

To generate routes and specs (mandatory to run the project) a command (tsoa specs-and-routes) is needed and it's included in npm start and npm test.

Decorators

TSOA uses decorators to define the API routes and docs. check out the TSOA docs for more info.

Notes

• The security decorator acts as a middleware adding a user object to the request that contains the decoded JWT token (or whatever you put on the return of the function in middlewares/auth.ts).
• The class ValidateError (extends Error) is used by TSOA to handle validation errors. Ex: If there's a missing property in the request body. A ValidateError is thrown and the error is handled by the ErrorHandler middleware.

Docker Configuration

A Dockerfile has been added to this project. The main reason to use Docker is to generate a production build, it is not intended for use for development. In fact, the Dockerfile has instructions only for generating the production-ready build. This is a multi-stage build that will build the project, run the migrations, and then run the server only with production dependiencies.

BullMQ worker

• To add a new worker we just need to create a new Worker() object in the worker folder and pass a queue name to pick up tasks from.
• To schedule a new job in the queue we need to create a new Queue() object in the queue folder and pass it a queue name to schedule tasks in. Any metadata for the task should be pass as a JSON, e.g queue.add('job_name', { ...params }, options);.

Rate limit

• To use express rate limit set the ENABLE_RATE_LIMIT env var to true otherwise rate limits will dependant on the nginx configuration.
• To add a new rate limit we need to create a new rateLimit object and then assign it to an endpoint e.g app.use('v1/auth/register', rateLimit). For more info check out the express-rate-limit docs.