Step by Step Guide to Building a Chargebee API Integration in Go

Hey there, fellow Go enthusiast! Ready to dive into the world of subscription management with Chargebee? Let's roll up our sleeves and build an awesome API integration using the chargebee-go package. Trust me, it's easier than you might think!

Prerequisites

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

• Go installed (I know you do, but just checking!)
• A Chargebee account with API keys handy
• Your Go skills polished and ready to go

Setting Up the Project

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

mkdir chargebee-integration
cd chargebee-integration
go mod init chargebee-integration
go get github.com/chargebee/chargebee-go

Easy peasy, right? Now we're ready to rock and roll!

Initializing the Chargebee Client

Let's start by importing the necessary packages and setting up our Chargebee client:

package main

import (
    "fmt"
    "github.com/chargebee/chargebee-go"
    "github.com/chargebee/chargebee-go/models/subscription"
)

func main() {
    chargebee.Configure("your-api-key", "your-site-name")
}

Replace "your-api-key" and "your-site-name" with your actual Chargebee credentials. You're now locked and loaded!

Implementing Core Chargebee Functionalities

Creating a Customer

Let's start by creating a customer:

result, err := customer.Create(&customer.CreateParams{
    FirstName: "John",
    LastName:  "Doe",
    Email:     "[email protected]",
}).Request()

if err != nil {
    fmt.Println("Error:", err)
    return
}

fmt.Println("Customer ID:", result.Customer.Id)

Creating a Subscription

Now, let's set up a subscription for our new customer:

result, err := subscription.Create(&subscription.CreateParams{
    PlanId:     "basic-monthly",
    CustomerId: result.Customer.Id,
}).Request()

if err != nil {
    fmt.Println("Error:", err)
    return
}

fmt.Println("Subscription ID:", result.Subscription.Id)

Retrieving Subscription Details

Want to check on that subscription? No problem:

result, err := subscription.Retrieve(result.Subscription.Id).Request()

if err != nil {
    fmt.Println("Error:", err)
    return
}

fmt.Printf("Subscription: %+v\n", result.Subscription)

Updating a Subscription

Need to make changes? We've got you covered:

result, err := subscription.Update(result.Subscription.Id, &subscription.UpdateParams{
    PlanId: "pro-monthly",
}).Request()

if err != nil {
    fmt.Println("Error:", err)
    return
}

fmt.Println("Updated Subscription:", result.Subscription.PlanId)

Canceling a Subscription

All good things must come to an end:

result, err := subscription.Cancel(result.Subscription.Id, &subscription.CancelParams{
    EndOfTerm: true,
}).Request()

if err != nil {
    fmt.Println("Error:", err)
    return
}

fmt.Println("Subscription Canceled:", result.Subscription.Status)

Error Handling and Best Practices

Always check for errors after each API call. The Chargebee API has rate limits, so consider implementing retry logic with exponential backoff for production use.

Testing the Integration

For testing, use Chargebee's test environment. Here's a quick unit test example:

func TestCreateCustomer(t *testing.T) {
    chargebee.Configure("your-test-api-key", "your-test-site")
    result, err := customer.Create(&customer.CreateParams{
        FirstName: "Test",
        LastName:  "User",
        Email:     "[email protected]",
    }).Request()

    if err != nil {
        t.Fatalf("Error creating customer: %v", err)
    }

    if result.Customer.FirstName != "Test" {
        t.Errorf("Expected first name 'Test', got '%s'", result.Customer.FirstName)
    }
}

Webhooks Integration (Optional)

Want to stay in the loop? Set up a webhook endpoint to handle Chargebee events:

http.HandleFunc("/webhook", func(w http.ResponseWriter, r *http.Request) {
    body, _ := ioutil.ReadAll(r.Body)
    event, err := webhook.Deserialize(string(body))
    if err != nil {
        http.Error(w, "Invalid webhook payload", http.StatusBadRequest)
        return
    }

    // Handle the event based on its type
    switch event.EventType {
    case "subscription_created":
        // Handle new subscription
    case "subscription_cancelled":
        // Handle cancellation
    // ... other event types
    }

    w.WriteHeader(http.StatusOK)
})

Wrapping Up

And there you have it! You've just built a solid Chargebee API integration in Go. Pretty cool, right? Remember, this is just scratching the surface. Chargebee offers a ton of other features you can explore.

For more in-depth info, check out the Chargebee API documentation and the chargebee-go package docs.

Happy coding, and may your subscriptions always be renewable!