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

Introduction

Hey there, fellow Go enthusiast! Ready to dive into the world of Salesmate API integration? You're in for a treat. We'll be building a robust integration that'll make your CRM data sing. Let's get cracking!

Prerequisites

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

• Go installed (I know, obvious, right?)
• Salesmate API credentials (you can't sneak into the party without an invite)
• Your favorite Go packages for HTTP requests and JSON handling

Setting up the project

First things first, let's get our project structure sorted:

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

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

Authentication

Salesmate uses API key authentication. Let's create a reusable client:

import (
    "net/http"
    "time"
)

type Client struct {
    BaseURL    string
    APIKey     string
    HTTPClient *http.Client
}

func NewClient(apiKey string) *Client {
    return &Client{
        BaseURL: "https://api.salesmate.io/v3",
        APIKey:  apiKey,
        HTTPClient: &http.Client{
            Timeout: time.Second * 10,
        },
    }
}

Basic API Operations

Now, let's get our hands dirty with some CRUD operations:

GET: Fetching contacts

func (c *Client) GetContacts() ([]Contact, error) {
    req, _ := http.NewRequest("GET", c.BaseURL+"/contacts", nil)
    req.Header.Set("X-API-KEY", c.APIKey)
    
    resp, err := c.HTTPClient.Do(req)
    // Handle response and error...
}

POST: Creating a new contact

func (c *Client) CreateContact(contact Contact) error {
    jsonData, _ := json.Marshal(contact)
    req, _ := http.NewRequest("POST", c.BaseURL+"/contacts", bytes.NewBuffer(jsonData))
    req.Header.Set("X-API-KEY", c.APIKey)
    req.Header.Set("Content-Type", "application/json")
    
    resp, err := c.HTTPClient.Do(req)
    // Handle response and error...
}

You get the idea for PUT and DELETE, right? Same dance, different moves.

Error Handling

Don't let those pesky errors catch you off guard. Parse them like a pro:

type APIError struct {
    Code    int    `json:"code"`
    Message string `json:"message"`
}

func (e *APIError) Error() string {
    return fmt.Sprintf("API error: %d - %s", e.Code, e.Message)
}

Advanced Features

Pagination

Salesmate uses cursor-based pagination. Here's how to handle it:

func (c *Client) GetContactsPaginated(cursor string) ([]Contact, string, error) {
    url := fmt.Sprintf("%s/contacts?cursor=%s", c.BaseURL, cursor)
    // Perform request and extract next cursor from response headers
}

Testing

Don't forget to test your code! Here's a quick example:

func TestGetContacts(t *testing.T) {
    client := NewClient("fake-api-key")
    client.BaseURL = "http://mock-api.com" // Use a mock server
    
    contacts, err := client.GetContacts()
    assert.NoError(t, err)
    assert.Len(t, contacts, 2)
}

Best Practices

1. Implement rate limiting to play nice with Salesmate's API.
2. Cache frequently accessed data to reduce API calls.
3. Log API requests and responses for easier debugging.

Conclusion

And there you have it! You've just built a sleek Salesmate API integration in Go. Remember, this is just the beginning. There's always room for optimization and expansion. Keep coding, keep learning, and most importantly, have fun with it!

For more details, check out the Salesmate API docs. Now go forth and integrate!