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

Introduction

Hey there, fellow Go enthusiast! Ready to dive into the world of Jobber API integration? You're in for a treat. We'll be building a robust integration that'll have you managing clients, jobs, and invoices like a pro. Let's get cracking!

Prerequisites

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

• A Go environment set up (I know you've probably got this sorted, but just in case!)
• Jobber API credentials (if you don't have these yet, hop over to Jobber's developer portal)

Setting up the project

Let's kick things off by creating a new Go module:

mkdir jobber-integration && cd jobber-integration
go mod init github.com/yourusername/jobber-integration

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

go get -u golang.org/x/oauth2
go get -u github.com/go-resty/resty/v2

Authentication

Jobber uses OAuth 2.0, so let's set that up:

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

func getClient(ctx context.Context) *http.Client {
    config := &oauth2.Config{
        ClientID:     "your-client-id",
        ClientSecret: "your-client-secret",
        Endpoint:     oauth2.Endpoint{
            AuthURL:  "https://api.getjobber.com/api/oauth/authorize",
            TokenURL: "https://api.getjobber.com/api/oauth/token",
        },
    }

    token := &oauth2.Token{
        AccessToken: "your-access-token",
        TokenType:   "Bearer",
    }

    return config.Client(ctx, token)
}

Pro tip: In a real-world scenario, you'd want to implement token refreshing and secure storage. But for now, this'll get us rolling!

Making API requests

Let's create a basic API client using the excellent resty library:

import "github.com/go-resty/resty/v2"

func newJobberClient(httpClient *http.Client) *resty.Client {
    return resty.NewWithClient(httpClient).
        SetBaseURL("https://api.getjobber.com/api").
        SetHeader("Accept", "application/json").
        SetRetryCount(3).
        SetRetryWaitTime(5 * time.Second)
}

See what we did there? We've baked in some retry logic to handle any temporary hiccups.

Implementing key Jobber API endpoints

Now for the fun part! Let's implement some key endpoints:

func getClients(client *resty.Client) ([]Client, error) {
    var response ClientResponse
    _, err := client.R().
        SetResult(&response).
        Get("/clients")
    return response.Clients, err
}

func createJob(client *resty.Client, job Job) error {
    _, err := client.R().
        SetBody(job).
        Post("/jobs")
    return err
}

func getInvoices(client *resty.Client) ([]Invoice, error) {
    var response InvoiceResponse
    _, err := client.R().
        SetResult(&response).
        Get("/invoices")
    return response.Invoices, err
}

Error handling and logging

Let's not forget about proper error handling and logging:

import "log"

func handleError(err error) {
    if err != nil {
        log.Printf("Error occurred: %v", err)
        // Add your error handling logic here
    }
}

Testing the integration

Testing is crucial, so let's write a quick unit test:

func TestGetClients(t *testing.T) {
    mockServer := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        w.WriteHeader(http.StatusOK)
        w.Write([]byte(`{"clients": [{"id": 1, "name": "Test Client"}]}`))
    }))
    defer mockServer.Close()

    client := resty.New().SetBaseURL(mockServer.URL)
    clients, err := getClients(client)

    if err != nil {
        t.Errorf("Expected no error, got %v", err)
    }

    if len(clients) != 1 {
        t.Errorf("Expected 1 client, got %d", len(clients))
    }
}

Best practices and optimization

To really make your integration shine, consider implementing caching for frequently accessed data and use goroutines for concurrent requests where appropriate.

Conclusion

And there you have it! You've just built a solid foundation for a Jobber API integration in Go. Remember, this is just the beginning. There's a whole world of Jobber API endpoints to explore and integrate.

Keep coding, keep learning, and most importantly, have fun with it! If you hit any snags, the Jobber API docs and Go community are fantastic resources. Now go forth and build something awesome!