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# AliExpress TOP API client
API client implementation for AliExpress TOP.

## Usage
1. This library uses `php-http/httplug` under the hood. If you don't want to bother with details, just install library and it's dependencies via Composer:
```sh
composer require php-http/curl-client nyholm/psr7 php-http/message retailcrm/aliexpress-top-client
```
Details about those third-party libraries and why you need to install them can be found [here](http://docs.php-http.org/en/latest/httplug/users.html).

2. Instantiate client using `TopClientFactory`:
```php
use RetailCrm\Component\AppData;
use RetailCrm\Factory\TopClientFactory;

$client = TopClientFactory::createClient(
    AppData::OVERSEAS_ENDPOINT,
    'appKey',
    'appSecret',
    'session token here'
);
```

3. Create and fill request data. All requests and responses use the same naming: part of the namespace is the first word in the request name, and everything else is in the request DTO class name. Requests live under `RetailCrm\Model\Request` namespace, and responses can be found in the `RetailCrm\Model\Response` namespace.
Let's use `taobao.httpdns.get` request as an example. It's first word is the `taobao`, so, this request can be found under `RetailCrm\Model\Request\Taobao` namespace, and it's class name is `HttpDnsGetRequest`. You can instantiate it with this code:
```php
use RetailCrm\Model\Request\Taobao\HttpDnsGetRequest;

$request = new HttpDnsGetRequest();
```
4. Send request using `TopClient::sendRequest` or `TopClient::sendAuthenticatedRequest` (you can't send authenticated request using client without authenticator). `taobao.httpdns.get` can be sent like this:
```php
/** @var \RetailCrm\Model\Response\Taobao\HttpDnsGetResponse $response */
$response = $client->sendRequest(new HttpDnsGetRequest());
```
This particular request doesn't require authorization, so, it can be sent via `TopClient::sendRequest` method. For any other requests which require authorization you must use `TopClient::sendAuthenticatedRequest` method (an example of such request would be `aliexpress.solution.seller.category.tree.query`, which class FQN is `\RetailCrm\Model\Request\AliExpress\SolutionSellerCategoryTreeQuery`).

**Friendly note.** Use response type annotations. Both client methods which returns responses actually returns `ResponseInterface` (not the PSR one). Actual response type will be determined by the request model. Your IDE will not recognize any response options unless you put a proper type annotation for the response variable.

## Customization
This library uses Container pattern under the hood. You can pass additional dependencies using `ContainerBuilder`. For example:
```php
use Http\Client\Curl\Client;
use RetailCrm\Component\AppData;
use RetailCrm\Component\Environment;
use Nyholm\Psr7\Factory\Psr17Factory;
use RetailCrm\Builder\TopClientBuilder;
use RetailCrm\Builder\ContainerBuilder;
use RetailCrm\Component\Logger\StdoutLogger;
use RetailCrm\Component\Authenticator\TokenAuthenticator;

$client = new Client();
$logger = new StdoutLogger();
$factory = new Psr17Factory();
$authenticator = new TokenAuthenticator('token');
$appData = new AppData(AppData::OVERSEAS_ENDPOINT, 'appKey', 'appSecret');
$container = ContainerBuilder::create()
            ->setEnv(Environment::TEST)
            ->setClient($client)
            ->setLogger($logger)
            ->setStreamFactory($factory)
            ->setRequestFactory($factory)
            ->setUriFactory($factory)
            ->build();
$client = TopClientBuilder::create()
            ->setContainer($container)
            ->setAppData($appData)
            ->build();
```
Logger should implement `Psr\Log\LoggerInterface` (PSR-3), HTTP client should implement `Psr\Http\TopClient\TopClientInterface` (PSR-18), HTTP objects must be compliant to PSR-7.
You can use your own container if you want to - it must be compliant to PSR-11. This is strongly discouraged because it'll be much easier to just integrate library with your own application, and your own DI system.

The simplest example of client initialization without using `TopClientFactory` looks like this:
```php
use RetailCrm\Component\AppData;
use RetailCrm\Builder\TopClientBuilder;
use RetailCrm\Builder\ContainerBuilder;
use RetailCrm\Component\Authenticator\TokenAuthenticator;

$appData = new AppData(AppData::OVERSEAS_ENDPOINT, 'appKey', 'appSecret');
$client = TopClientBuilder::create()
            ->setContainer(ContainerBuilder::create()->build())
            ->setAppData($appData)
            ->setAuthenticator(new TokenAuthenticator('session token here'))
            ->build();
```
In fact, `TopClientFactory` works just like this under the hood.