Step by Step Guide to Building an OptinMonster API Integration in Go

Aug 16, 2024 • 5 minute read

Introduction

Hey there, fellow Go enthusiast! Ready to supercharge your marketing efforts with OptinMonster? Let's dive into building a slick API integration that'll have you managing campaigns, forms, and subscribers like a pro. We'll keep things snappy and to the point, so buckle up!

Prerequisites

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

Go installed (you're a pro, so I'm sure you do)
An OptinMonster account with API credentials (if not, hop to it!)

Setting up the project

Let's get this show on the road:

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

Now, let's grab the HTTP client we'll be using:

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

Authentication

Time to flex those API muscles. Create a new file client.go:

package optinmonster

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

type Client struct {
    httpClient *resty.Client
    apiKey     string
}

func NewClient(apiKey string) *Client {
    return &Client{
        httpClient: resty.New(),
        apiKey:     apiKey,
    }
}

Basic API requests

Let's whip up some GET and POST requests:

func (c *Client) GetCampaigns() ([]Campaign, error) {
    var campaigns []Campaign
    _, err := c.httpClient.R().
        SetHeader("Authorization", "Bearer "+c.apiKey).
        SetResult(&campaigns).
        Get("https://api.optinmonster.com/v2/campaigns")
    return campaigns, err
}

func (c *Client) CreateCampaign(campaign Campaign) (Campaign, error) {
    var createdCampaign Campaign
    _, err := c.httpClient.R().
        SetHeader("Authorization", "Bearer "+c.apiKey).
        SetBody(campaign).
        SetResult(&createdCampaign).
        Post("https://api.optinmonster.com/v2/campaigns")
    return createdCampaign, err
}

Handling responses

Go's got your back with built-in JSON parsing. Let's define our structs:

type Campaign struct {
    ID   string `json:"id"`
    Name string `json:"name"`
    // Add more fields as needed
}

Error handling? We've got you covered:

if err != nil {
    return fmt.Errorf("failed to get campaigns: %w", err)
}

Implementing key OptinMonster API endpoints

Let's tackle campaigns, forms, and subscribers:

func (c *Client) GetForms() ([]Form, error) {
    // Similar to GetCampaigns
}

func (c *Client) AddSubscriber(campaignID string, subscriber Subscriber) error {
    // Implementation here
}

Optimizing API usage

Keep an eye on those rate limits! Implement a simple rate limiter:

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

type Client struct {
    // ...
    rateLimiter *rate.Limiter
}

func NewClient(apiKey string) *Client {
    return &Client{
        // ...
        rateLimiter: rate.NewLimiter(rate.Limit(5), 1), // 5 requests per second
    }
}

Testing the integration

Time to put our code through its paces:

func TestGetCampaigns(t *testing.T) {
    client := NewClient("your-api-key")
    campaigns, err := client.GetCampaigns()
    assert.NoError(t, err)
    assert.NotEmpty(t, campaigns)
}

Best practices and tips

Log everything (but keep those API keys secret!)
Stay up-to-date with OptinMonster's API changes
Use environment variables for sensitive info

Conclusion

And there you have it! You've just built a lean, mean OptinMonster integration machine. With this foundation, you can expand and customize to your heart's content. Remember, the API is your oyster – so go forth and optimize those conversions!

Resources

Now go out there and make some OptinMonster magic happen! 🚀