Step by Step Guide to Building a Heroku API Integration in JS

Introduction

Hey there, fellow dev! Ready to supercharge your app with Heroku's API? Let's dive into building a slick integration using the heroku-client package. Trust me, it's easier than you think, and you'll be automating Heroku tasks like a pro in no time.

Prerequisites

Before we jump in, make sure you've got:

• Node.js and npm (you're a dev, so I'm sure you're covered)
• A Heroku account and API key (grab it from your account settings if you haven't already)

Setting up the project

Let's get the boring stuff out of the way:

mkdir heroku-api-project && cd heroku-api-project
npm init -y
npm install heroku-client

Configuring heroku-client

Now for the fun part. Let's get that client set up:

const Heroku = require('heroku-client');
const heroku = new Heroku({ token: process.env.HEROKU_API_KEY });

Pro tip: Always use environment variables for sensitive info. Your future self will thank you.

Basic API operations

Time to flex those API muscles:

// Fetch app info
const appInfo = await heroku.get('/apps/your-app-name');

// List dynos
const dynos = await heroku.get('/apps/your-app-name/dynos');

// Scale dynos
await heroku.patch('/apps/your-app-name/formation/web', {
  body: { quantity: 2, size: 'standard-1x' }
});

Advanced operations

Ready to level up? Let's tackle some advanced stuff:

// Deploy code
await heroku.post('/apps/your-app-name/builds', {
  body: {
    source_blob: {
      url: 'https://github.com/your-repo/archive/main.tar.gz'
    }
  }
});

// Manage addons
await heroku.post('/apps/your-app-name/addons', {
  body: { plan: 'heroku-postgresql:hobby-dev' }
});

// Handle logs
const logs = await heroku.get('/apps/your-app-name/log-sessions', {
  body: { tail: true, lines: 100 }
});

Error handling and best practices

Don't let errors catch you off guard:

try {
  // Your API call here
} catch (error) {
  if (error.statusCode === 429) {
    // Handle rate limit
    console.log('Whoa there! Slow down a bit.');
  } else {
    console.error('Oops!', error.message);
  }
}

Testing the integration

Let's make sure everything's ship-shape:

const mockHeroku = jest.mock('heroku-client');

test('fetches app info', async () => {
  mockHeroku.get.mockResolvedValue({ name: 'test-app' });
  const appInfo = await heroku.get('/apps/test-app');
  expect(appInfo.name).toBe('test-app');
});

Conclusion

And there you have it! You're now equipped to harness the power of Heroku's API. Remember, this is just scratching the surface. The Heroku API has tons more to offer, so don't be afraid to explore and experiment.

Want to dive deeper? Check out the Heroku Platform API Reference for more endpoints and options.

Happy coding, and may your deploys be swift and your apps scalable!