[API] DevRadar

Responsible for provide data to the web and mobile front-ends. Permit developers to register yourself using GitHub and to find another developers. The app has pagination, pagination's link header (to previous, next, first and last page), friendly errors, use JWT to logins, validation, also a simple versioning was made.

Table of Contents

• Installing
  • Configuring
    • .env
    • MongoDB
    • GitHub OAuth App
• Usage
  • Error Handling
    • Errors Reference
  • Pagination
    • Link Header
    • X-Total-Count
  • Bearer Token
  • Versioning
  • Routes
    • Requests
• Running the tests
  • Coverage report

Installing

Easy peasy lemon squeezy:

$ yarn

Or:

$ npm install

Was installed and configured the eslint and prettier to keep the code clean and patterned.

Configuring

The application uses just one database: MongoDB. For the fastest setup is recommended to use docker-compose, you just need to up all services:

$ docker-compose up -d

.env

In this file you may configure your MongoDB database connection, JWT settings, the environment, app's port, url to documentation (this will be returned with error responses, see error section) and GitHub's OAuth App keys. Rename the .env.example in the root directory to .env then just update with your settings.

key	description	default
APP_PORT	Port number where the app will run.	3333
NODE_ENV	App environment.	development
JWT_SECRET	An alphanumeric random string. Used to create signed tokens.	-
JWT_EXPIRATION_TIME	How long time will be the token valid. See jsonwebtoken repo for more information.	7d
MONGO_URL	MongoDB's server url.	mongodb://mongo:27017/devradar
GITHUB_CLIENT_ID and GITHUB_CLIENT_SECRET	GitHub's OAuth App credentials. See GitHub OAuth App for more information.	-
DOCS_URL	An url to docs where users can find more information about the app's internal code errors.	https://github.com/DiegoVictor/devradar-api#errors-reference

MongoDB

Store all application data. If for any reason you would like to create a MongoDB container instead of use docker-compose, you can do it by running the following command:

$ docker run --name devradar-mongo -d -p 27017:27017 mongo

Github OAuth App

First you need to create a GitHub OAuth App, just remember to configure the field Authorization callback URL with the project's web version home page url.

If you are running the application local I recommend you to use ngrok to export a url to access the application. (e.g. https://25752eff.ngrok.io)

Usage

To start up the app run:

$ yarn start

Or:

$ npm run start

Error Handling

Instead of only throw a simple message and HTTP Status Code this API return friendly errors:

{
  "statusCode": 400,
  "error": "Bad Request",
  "message": "You are already registered",
  "code": 140,
  "docs": "https://github.com/DiegoVictor/devradar-api#errors-reference"
}

Errors are implemented with @hapi/boom. As you can see a url to errors docs are returned too. To configure this url update the DOCS_URL key from .env file. In the next sub section (Errors Reference) you can see the errors code description.

Errors Reference

code	message	description
140	You are already registered	The GitHub's user is already registered.
144	Developer does not exists	The id sent not references an existing developer in the database.
531	An error ocurred while trying to exchange a GitHub's access token	An error occurred during the request to get the user's access token on GitHub API, look the details key for more information.
532	An error ocurred while trying to retrieve the user from GitHub	The request to get GitHub user's data from GitHub API throw an error. Look the details key for more information.
240	Missing authorization token	The Bearer Token was not sent.
241	Token expired or invalid	The Bearer Token provided is invalid or expired.

Pagination

All the routes with pagination returns 10 records per page, to navigate to other pages just send the page query parameter with the number of the page.

• To get the third page of incidents:

GET http://localhost:3333/v1/developers?page=3

Link Header

Also in the headers of every route with pagination the Link header is returned with links to first, last, next and prev (previous) page.

<http://localhost:3333/v1/developers?page=7>; rel="last",
<http://localhost:3333/v1/developers?page=4>; rel="next",
<http://localhost:3333/v1/developers?page=1>; rel="first",
<http://localhost:3333/v1/developers?page=2>; rel="prev"

See more about this header in this MDN doc: Link - HTTP.

X-Total-Count

Another header returned in routes with pagination, this bring the total records amount.

Bearer Token

A few routes expect a Bearer Token in an Authorization header.

You can see these routes in the routes section.

DELETE http://localhost:3333/v1/developers Authorization: Bearer <token>

To achieve this token you just need authenticate through the /sessions route and it will return the token key with a valid Bearer Token.

Versioning

A simple versioning was made. Just remember to set after the host the /v1/ string to your requests.

GET http://localhost:3333/v1/developers

Routes

route	HTTP Method	pagination	params	description	auth method
/sessions	POST	❌	Body with user's code.	Authenticates developer, return a Bearer Token and developer's information.	❌
/search	GET	❌	techs, latitude and longitude query parameters.	Search nearest developers with the same techs.	❌
/developers	GET	✔️	page query parameter.	List developers.	❌
/developers/:id	GET	❌	:id of the developer.	Return one developer.	❌
/developers	POST	❌	Body with developer's techs, latitude, longitude and code.	Create new developers.	❌
/developers	PUT	❌	Body with developer's name, bio, avatar_url, techs, latitude and longitude.	Update one developer.	Bearer
/developers	DELETE	❌	-	Remove one developer.	Bearer

Routes with Bearer as auth method expect an Authorization header. See Bearer Token section for more information. After users approve your OAuth App on GitHub, it will redirect to the Authorization callback URL with a parameter code that should be sent in some routes, that you can see above.

Requests

• POST /sessions

Request body:

{
  "code": "32g2a27129w2qc23pch3"
}

• POST /developers

Request body:

{
  "code": "6qca5876158fqq1ccat9",
  "techs": "Node.js, ReactJS, React Native",
  "latitude": 52.1199,
  "longitude": 159.0477
}

• PUT /developers

Request body:

{
  "techs": "Node.js, ReactJS",
  "name": "John Doe",
  "avatar_url": "https://avatars2.githubusercontent.com/u/15165349?s=460",
  "bio": "Let's go!",
  "latitude": -73.0510,
  "longitude": -64.7188
}

Running the tests

Jest was the choice to test the app, to run:

$ yarn test

Or:

$ npm run test

Coverage report

You can see the coverage report inside tests/coverage. They are automatically created after the tests run.