mapado/rest-client-sdk

Rest Client SDK for hydra API


README

PHP Rest Client SDK for JSON API.

This client tries to avoid the complexity of implementing a custom SDK for every API you have. You just have to implements your model and a little configuration and it will hide the complexity for you.

installation

composer require mapado/rest-client-sdk

Usage

Imagine you have those API endpoints:

  • /v2/carts
  • /v2/carts/{id}
  • /v2/cart_items
  • /v2/cart_items/{id}

You will need to have two entities, let's say:

  • Foo\Bar\Model\Cart
  • Foo\Bar\Model\CartItem

You will need to declare one Mapping containing your two ClassMetadata

Entity declarations

Configure an entity

Imagine the following entities:

namespace Acme\Foo\Bar;

use Mapado\RestClientSdk\Mapping\Annotations as Rest;

/**
 * @Rest\Entity(key="carts")
 */
class Cart {
    /**
     * @Rest\Id
     * @Rest\Attribute(name="@id", type="string")
     */
    private $iri;

    /**
     * @Rest\Attribute(name="status", type="string")
     */
    private $status;

    /**
     * @Rest\Attribute(name="created_at", type="datetime")
     */
    private $createdAt;

    /**
     * @Rest\OneToMany(name="cart_items", targetEntity="CartItem")
     */
    private $cartItemList;

    // getters & setters ...
}

/**
 * @Rest\Entity(key="cart_items")
 */
class CartItem {
    /**
     * @Rest\Id
     * @Rest\Attribute(name="@id", type="string")
     */
    private $iri;

    /**
     * @Rest\Attribute(name="number", type="integer")
     */
    private $number;

    /**
     * @Rest\ManyToOne(name="cart", targetEntity="Cart")
     */
    private $cart;
}

Explanations

Entity definitions:

  • key must be the key of your API endpoint

Attributes definition:

  • name the name of the key in the API return format
  • type type of the attribute

Relations definition:

  • name the name of the key in the API return format
  • targetEntity class name of the target entity

UnitOfWork

EntityRepository has a UnitofWork used for PUT and POST requests. It sends only changed data not the full model by comparing with the entity stored on GET request.

Configuration

Using Symfony ?

There is a bundle to easily integrate this component: mapado/rest-client-sdk-bundle.

Once configured, you can get a client like this:

$sdkClient = $this->get('mapado.rest_client_sdk.foo');

Not using Symfony

You need to configure client this way:

use Mapado\RestClientSdk\Mapping;
use Mapado\RestClientSdk\RestClient;
use Mapado\RestClientSdk\SdkClient;
use Mapado\RestClientSdk\Mapping\Driver\AnnotationDriver;

$restClient = new RestClient(new GuzzleHttp\Client(), 'http://path-to-your-api.root');

// if you need to pass some headers to the client, you can do something like this:
// $restClient = new RestClient(
//   new GuzzleHttp\Client(['headers' => [ 'Authorization' => 'Bearer foobar' ]]),
//   'http://path-to-your-api.root'
// );
// See guzzle documentation for more informations

$annotationDriver = new AnnotationDriver($cachePath, $debug = true);

$mapping = new Mapping('/v2'); // /v2 is the prefix of your routes
$mapping->setMapping($annotationDriver->loadDirectory($pathToEntityDirectory));

$sdkClient = new SdkClient($restClient, $mapping);

Accessing data

Fetching an entity / a list of entities

$repository = $sdkClient->getRepository('Acme\Foo\Bar\Cart');

// you can also access the repository by model key:
// $repository = $sdkClient->getRepository('cart');

// Find entity based on ID as defined in the entity by @Rest\Id
$cart = $repository->find(1);

// If you need to pass extra query parameters : 
$cart = $repository->find(1, ['foo' => 'bar']); // will call /v2/carts/1?foo=bar

// Find all entities in the database
$cart = $repository->findAll();

// Find one entity based on the fielddefined in the function name (in this case <Name>)
$cart = $repository->findOneByName('username'); // will call /v2/carts?name=username

// Find one entity based on the criteria defined in the array
$cart = $repository->findOneBy(array('name'=>'username','date'=>'1-1-2016')); // will call /v2/carts?name=username&date=1-1-2016

// To find all matches for the two examples above replace findOneByName() with findByName() and findOneBy() with findBy()

Creating a new instance

$cart = new \Acme\Foo\Bar\Cart;
$cart->setStatus('awaiting_payment');
$cart->setCreatedAt(new \DateTime());
$repository->persist($cart);

The persist operation will send a POST request with the serialized object to the API endpoint and return the newly created object

Updating an instance

$cart = $repository->find(13);
$cart->setStatus('payed');
$repository->update($cart);

The update operation will send a PUT request with the serialized object to the API endpoint (using the object Id) and return the updated object.

Deleting an instance

$cart = $repository->find(13);
$repository->remove($cart);

The remove operation will send a DELETE request to the API endpoint using the object Id.

Custom serialization

By default, when serializing, the SDK return only the Id to existing relations (like one-to-many).

You may want to serialize OneToMany relations though (imagine you have a Cart and you want to update linked cartItems)

to do so, you can specify a $serializationContext in the persist and update method:

$repostory->update($cart, [ 'serializeRelations' => [ 'cartItems' ] ]);

Extending the repository

If you need to extend the EntityRepository, you can just do something like that:

namespace Acme\Foo\Bar\Repository;

use Mapado\RestClientSdk\EntityRepository;

class CartRepository extends EntityRepository
{
    public function findOneByFoo($bar) {
        // generate the path to call
        $path = // ...
        $data = $this->restClient->get($path);
        return $this->sdk->getModelHydrator()->hydrate($data, $this->entityName); // hydrate for an entity, hydrateList for a list
    }
}

Update your entity @Rest annotation to let the entity be aware of it's repository:

namespace Acme\Foo\Bar;

use Mapado\RestClientSdk\Mapping\Annotations as Rest;

/**
 * @Rest\Entity(key="carts", repository="Acme\Foo\Bar\Repository\CartRepository")
 */
class Cart {

Handling exceptions

The SDK will throw an Exception if your API return something different than a 2xx or a 404 status code.

You can see all the exceptions in this folder.

If you need to access the body of the response from your API you can do something like this:

use Mapado\RestClientSdk\Exception\RestClientException;

try {
    // do something that will fail
} catch (\RestClientException $e) {
    $response = $e->getResponse(); // $response should be a Psr\Http\Message\ResponseInterface
    $body = $response->getBody();
    var_dump($body); // will dump your response body
}