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

Introduction

Hey there, fellow developer! Ready to dive into the world of Hotmart API integration using Go? You're in for a treat. We'll be building a robust integration that'll have you tapping into Hotmart's powerful features in no time. Let's get cracking!

Prerequisites

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

• Go installed on your machine (you're a pro, so I'm sure you've got this covered)
• A Hotmart account with API credentials (if you don't have this, hop over to Hotmart and sort it out)

Setting up the project

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

mkdir hotmart-integration
cd hotmart-integration
go mod init hotmart-integration

Now, let's grab the dependencies we'll need:

go get github.com/go-resty/resty/v2

Authentication

Alright, time to get our hands dirty with authentication. Hotmart uses OAuth 2.0, so we'll need to implement a token refresh mechanism. Here's a quick snippet to get you started:

import (
    "github.com/go-resty/resty/v2"
    "time"
)

type Token struct {
    AccessToken string `json:"access_token"`
    ExpiresIn   int    `json:"expires_in"`
}

func getToken(client *resty.Client, clientID, clientSecret string) (*Token, error) {
    // Implementation here
}

func refreshToken(client *resty.Client, refreshToken string) (*Token, error) {
    // Implementation here
}

Making API requests

Now that we've got authentication sorted, let's set up our HTTP client:

client := resty.New()
client.SetBaseURL("https://developers.hotmart.com/payments/api/v1")
client.SetAuthToken(token.AccessToken)

Implementing key Hotmart API endpoints

Let's implement some key endpoints. We'll focus on products, sales, subscriptions, and affiliates:

func getProducts(client *resty.Client) ([]Product, error) {
    // Implementation here
}

func getSales(client *resty.Client) ([]Sale, error) {
    // Implementation here
}

func getSubscriptions(client *resty.Client) ([]Subscription, error) {
    // Implementation here
}

func getAffiliates(client *resty.Client) ([]Affiliate, error) {
    // Implementation here
}

Error handling and logging

Don't forget to implement robust error handling and logging. It'll save you hours of debugging later:

import "log"

func handleError(err error) {
    if err != nil {
        log.Printf("Error: %v", err)
        // Handle the error appropriately
    }
}

Data processing and storage

Parse those JSON responses and store the data if needed. Here's a quick example:

import "encoding/json"

func parseProducts(data []byte) ([]Product, error) {
    var products []Product
    err := json.Unmarshal(data, &products)
    return products, err
}

Building a simple CLI tool

Let's wrap this all up in a neat CLI tool:

package main

import (
    "flag"
    "fmt"
)

func main() {
    action := flag.String("action", "", "Action to perform (products, sales, subscriptions, affiliates)")
    flag.Parse()

    switch *action {
    case "products":
        // Call getProducts
    case "sales":
        // Call getSales
    // ... other cases
    default:
        fmt.Println("Invalid action")
    }
}

Testing the integration

Don't forget to test your integration thoroughly. Here's a simple test to get you started:

func TestGetProducts(t *testing.T) {
    // Test implementation here
}

Best practices and optimization

Remember to implement rate limiting, caching, and consider concurrency for optimal performance. Here's a quick rate limiting example:

import "golang.org/x/time/rate"

limiter := rate.NewLimiter(rate.Every(time.Second), 5)

if err := limiter.Wait(context.Background()); err != nil {
    // Handle error
}
// Make API request

Conclusion

And there you have it! You've just built a solid Hotmart API integration in Go. Remember, this is just the beginning. There's always room for improvement and expansion. Keep exploring the Hotmart API docs and happy coding!

For more info, check out the Hotmart API documentation.

Now go forth and integrate with confidence!