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

Introduction

Hey there, fellow Go enthusiast! Ready to ride the Wave? No, not the ocean kind – we're talking about the Wave API. In this guide, we'll walk through building a slick integration that'll have you surfing through financial data like a pro. Buckle up, because we're about to catch some serious code waves!

Prerequisites

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

• Go installed (I know, obvious, right?)
• Wave API credentials (if you don't have 'em, go grab 'em!)
• Your favorite Go packages for HTTP requests and JSON handling

Setting up the project

Let's get this party started:

mkdir wave-api-integration
cd wave-api-integration
go mod init github.com/yourusername/wave-api-integration

Boom! Project structure: done. Go modules: initialized. You're on a roll!

Authentication

Wave uses OAuth 2.0, so let's tackle that beast:

import (
    "golang.org/x/oauth2"
)

config := &oauth2.Config{
    ClientID:     "your-client-id",
    ClientSecret: "your-client-secret",
    Endpoint:     oauth2.Endpoint{
        AuthURL:  "https://api.waveapps.com/oauth2/authorize/",
        TokenURL: "https://api.waveapps.com/oauth2/token/",
    },
}

// Get your token and store it securely
// You know the drill!

Pro tip: Store those tokens safely. Your future self will thank you!

Making API requests

Time to create our API client:

type WaveClient struct {
    httpClient *http.Client
    baseURL    string
}

func NewWaveClient(token string) *WaveClient {
    return &WaveClient{
        httpClient: oauth2.NewClient(context.Background(), oauth2.StaticTokenSource(
            &oauth2.Token{AccessToken: token},
        )),
        baseURL: "https://api.waveapps.com/v1/",
    }
}

Don't forget to handle rate limiting and retries. Be nice to the API, and it'll be nice to you!

Implementing key Wave API endpoints

Let's get our hands dirty with some real endpoints:

func (c *WaveClient) GetCustomers() ([]Customer, error) {
    // Fetch those customers!
}

func (c *WaveClient) CreateInvoice(invoice Invoice) (Invoice, error) {
    // Create an invoice like a boss
}

func (c *WaveClient) ProcessPayment(payment Payment) error {
    // Show me the money!
}

Error handling and logging

Nobody likes silent failures. Let's make some noise:

if err != nil {
    log.Printf("Error fetching customers: %v", err)
    return nil, fmt.Errorf("failed to fetch customers: %w", err)
}

Logging is your friend. Embrace it!

Testing the integration

Test, test, and test again:

func TestGetCustomers(t *testing.T) {
    // Mock the API response
    // Assert till your heart's content
}

Don't forget to use Wave's sandbox for integration testing. It's like a playground, but for code!

Best practices and optimization

• Cache like there's no tomorrow (but invalidate responsibly)
• Concurrent requests? Go routines are your best pals

Conclusion

And there you have it! You've just built a Wave API integration that would make any gopher proud. Remember, the API is your oyster – keep exploring, keep coding, and keep riding those waves!

For more in-depth info, check out the Wave API docs. Now go forth and create some financial magic! 🌊🚀