Step by Step Guide to Building a Kajabi API Integration in Ruby

Introduction

Hey there, fellow developer! Ready to dive into the world of Kajabi API integration? You're in for a treat. Kajabi's API is a powerful tool that'll let you tap into their platform's functionality, opening up a world of possibilities for your Ruby projects. Whether you're looking to manage courses, handle users, or process payments, we've got you covered. Let's get started!

Prerequisites

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

• Ruby 2.7+ installed
• The httparty and dotenv gems
• Your Kajabi API credentials (if you don't have these yet, don't sweat it – we'll cover that)

Setting Up the Project

First things first, let's get our project set up:

mkdir kajabi_integration
cd kajabi_integration
bundle init

Now, add these gems to your Gemfile:

gem 'httparty'
gem 'dotenv'

Run bundle install, and you're good to go!

Authentication

Alright, time for the fun part – authentication. Kajabi uses OAuth 2.0, so let's set that up:

1. Head over to your Kajabi Developer Portal and create a new app to get your API credentials.
2. Create a .env file in your project root and add your credentials:

KAJABI_CLIENT_ID=your_client_id
KAJABI_CLIENT_SECRET=your_client_secret

3. Now, let's implement the OAuth flow:

require 'httparty'
require 'dotenv/load'

class KajabiAuth
  include HTTParty
  base_uri 'https://kajabi.com/oauth'

  def self.get_token
    response = post('/token', {
      body: {
        grant_type: 'client_credentials',
        client_id: ENV['KAJABI_CLIENT_ID'],
        client_secret: ENV['KAJABI_CLIENT_SECRET']
      }
    })
    response['access_token']
  end
end

Making API Requests

Now that we're authenticated, let's make some requests:

class KajabiAPI
  include HTTParty
  base_uri 'https://kajabi.com/api/v1'

  def initialize
    @options = { headers: { 'Authorization' => "Bearer #{KajabiAuth.get_token}" } }
  end

  def get_courses
    self.class.get('/courses', @options)
  end

  # Add more methods for other endpoints
end

Core API Functionalities

Let's implement some key functionalities:

class KajabiAPI
  # ... previous code ...

  def create_user(user_data)
    self.class.post('/users', @options.merge(body: user_data))
  end

  def process_payment(payment_data)
    self.class.post('/payments', @options.merge(body: payment_data))
  end
end

Webhooks Integration

Kajabi's webhooks are super useful for real-time updates. Here's a basic Sinatra app to handle them:

require 'sinatra'
require 'json'

post '/webhooks/kajabi' do
  payload = JSON.parse(request.body.read)
  
  case payload['event']
  when 'course.purchased'
    # Handle course purchase
  when 'subscription.created'
    # Handle new subscription
  end

  status 200
end

Error Handling and Logging

Don't forget to implement robust error handling:

class KajabiAPI
  # ... previous code ...

  private

  def handle_response(response)
    case response.code
    when 200..299
      response
    when 401
      raise "Unauthorized: #{response.message}"
    when 404
      raise "Not Found: #{response.message}"
    else
      raise "API Error: #{response.message}"
    end
  end
end

Testing the Integration

Testing is crucial. Here's a simple RSpec example:

RSpec.describe KajabiAPI do
  let(:api) { KajabiAPI.new }

  it "fetches courses successfully" do
    VCR.use_cassette("courses") do
      response = api.get_courses
      expect(response.code).to eq(200)
      expect(response.body).to include("courses")
    end
  end
end

Best Practices and Optimization

Remember to respect rate limits and implement caching where appropriate. For example:

def get_courses
  Rails.cache.fetch("kajabi_courses", expires_in: 1.hour) do
    self.class.get('/courses', @options)
  end
end

Deployment Considerations

When deploying, ensure your API keys are securely stored as environment variables. Consider using a service like Heroku Config Vars or AWS Secrets Manager.

Conclusion

And there you have it! You've just built a solid Kajabi API integration in Ruby. Remember, this is just the beginning – there's so much more you can do with the Kajabi API. Keep exploring, keep building, and most importantly, have fun with it!

For more details, check out the Kajabi API documentation. Happy coding!