Step by Step Guide to Building an Adobe Commerce API Integration in PHP

Introduction

Hey there, fellow developer! Ready to dive into the world of Adobe Commerce API integration? You're in for a treat. This guide will walk you through creating a robust PHP integration with Adobe Commerce's powerful API. We'll cover everything from authentication to best practices, so buckle up and let's get coding!

Prerequisites

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

• A PHP environment (7.4+ recommended)
• An Adobe Commerce account with API credentials
• Composer installed for managing dependencies

Got all that? Great! Let's move on to the fun stuff.

Authentication

First things first, we need to get that sweet, sweet access token. Adobe Commerce uses OAuth 2.0, so let's implement that flow:

<?php
$client = new GuzzleHttp\Client();
$response = $client->post('https://your-instance.com/oauth/token', [
    'form_params' => [
        'grant_type' => 'client_credentials',
        'client_id' => 'your_client_id',
        'client_secret' => 'your_client_secret',
    ]
]);

$token = json_decode($response->getBody())->access_token;

Nice! Now we've got our token, we're ready to start making requests.

Setting up the API Client

Let's create a base API client class to handle our requests. We'll use Guzzle for this:

<?php
use GuzzleHttp\Client;

class AdobeCommerceClient
{
    private $client;
    private $token;

    public function __construct($token)
    {
        $this->token = $token;
        $this->client = new Client([
            'base_uri' => 'https://your-instance.com/rest/V1/',
            'headers' => [
                'Authorization' => 'Bearer ' . $this->token,
                'Content-Type' => 'application/json',
            ]
        ]);
    }

    public function get($endpoint)
    {
        return $this->client->get($endpoint);
    }

    // Add post, put, delete methods as needed
}

Implementing Core API Endpoints

Now for the meat and potatoes. Let's implement some core endpoints:

Products API

public function getProducts($searchCriteria = [])
{
    $query = http_build_query(['searchCriteria' => $searchCriteria]);
    return $this->get("products?{$query}");
}

Orders API

public function getOrders($searchCriteria = [])
{
    $query = http_build_query(['searchCriteria' => $searchCriteria]);
    return $this->get("orders?{$query}");
}

Customers API

public function getCustomers($searchCriteria = [])
{
    $query = http_build_query(['searchCriteria' => $searchCriteria]);
    return $this->get("customers/search?{$query}");
}

Error Handling and Logging

Don't forget to wrap your API calls in try-catch blocks and log those responses:

try {
    $response = $this->client->getProducts();
    $this->logger->info('Products fetched successfully', ['response' => $response]);
} catch (\Exception $e) {
    $this->logger->error('Error fetching products', ['error' => $e->getMessage()]);
}

Rate Limiting and Pagination

Adobe Commerce has rate limits, so let's handle those gracefully:

public function handleRateLimit($response)
{
    if ($response->getStatusCode() === 429) {
        $retryAfter = $response->getHeader('Retry-After')[0] ?? 60;
        sleep($retryAfter);
        return $this->client->send($response->getRequest());
    }
    return $response;
}

For pagination, use the searchCriteria parameter:

$searchCriteria = [
    'currentPage' => 1,
    'pageSize' => 20
];

Testing the Integration

Unit testing is your friend. Here's a quick example using PHPUnit:

public function testGetProducts()
{
    $client = $this->createMock(AdobeCommerceClient::class);
    $client->expects($this->once())
           ->method('get')
           ->with('products')
           ->willReturn(['product1', 'product2']);

    $this->assertEquals(['product1', 'product2'], $client->getProducts());
}

Best Practices and Optimization

1. Cache frequently accessed data to reduce API calls.
2. Use asynchronous requests for non-blocking operations.
3. Implement webhooks for real-time updates instead of constant polling.

Conclusion

And there you have it! You've just built a solid foundation for your Adobe Commerce API integration. Remember, this is just the beginning. The API has a ton more endpoints to explore, so keep experimenting and building awesome stuff!

For more in-depth info, check out the official Adobe Commerce API docs. Happy coding!