validate AppData, easier client instantiation for those who don't want to look into the complex inner logic

README.md

@@ -7,25 +7,23 @@
 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 through Composer:
+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 like that:
+2. Instantiate client using `TopClientFactory`:
 ```php
 use RetailCrm\Component\AppData;
-use RetailCrm\Builder\TopClientBuilder;
-use RetailCrm\Builder\ContainerBuilder;
-use RetailCrm\Component\Authenticator\TokenAuthenticator;
+use RetailCrm\Factory\TopClientFactory;
 
-$appData = new AppData(AppData::OVERSEAS_ENDPOINT, 'appKey', 'appSecret');
-$client = TopClientBuilder::create()
-            ->setContainer(ContainerBuilder::create()->build())
-            ->setAppData($appData)
-            ->setAuthenticator(new TokenAuthenticator('session token here'))
-            ->build();
+$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.
@@ -75,5 +73,21 @@ $client = TopClientBuilder::create()
             ->build();
 ```
 Logger should implement `Psr\Log\LoggerInterface` (PSR-3), HTTP client should implement `Psr\Http\TopClient\TopClientInterface` (PSR-18), HTTP objects must be compliant to PSR-7.
+You can use your own container if you want to - it must be compliant to PSR-11. This is strongly discouraged because it'll be much easier to just integrate library with your own application, and your own DI system.
+
+The simplest example of client initialization without using `TopClientFactory` looks like this:
+```php
+use RetailCrm\Component\AppData;
+use RetailCrm\Builder\TopClientBuilder;
+use RetailCrm\Builder\ContainerBuilder;
+use RetailCrm\Component\Authenticator\TokenAuthenticator;
+
+$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.
 
-You can use your own container - 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.

src/Component/AppData.php

@@ -26,7 +26,7 @@ class AppData implements AppDataInterface
     /**
      * @var string $serviceUrl
      * @Assert\Url()
-     * @Assert\Choice(choices=Client::AVAILABLE_ENDPOINTS, message="Invalid endpoint provided.")
+     * @Assert\Choice(choices=AppData::AVAILABLE_ENDPOINTS, message="Invalid endpoint provided.")
      */
     protected $serviceUrl;
 

src/Factory/TopClientFactory.php

@@ -0,0 +1,53 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category TopClientFactory
+ * @package  RetailCrm\Factory
+ */
+namespace RetailCrm\Factory;
+
+use RetailCrm\Builder\ContainerBuilder;
+use RetailCrm\Builder\TopClientBuilder;
+use RetailCrm\Component\AppData;
+use RetailCrm\Component\Authenticator\TokenAuthenticator;
+use RetailCrm\TopClient\TopClient;
+
+/**
+ * Class TopClientFactory
+ *
+ * @category TopClientFactory
+ * @package  RetailCrm\Factory
+ */
+class TopClientFactory
+{
+    /**
+     * Create new TopClient
+     *
+     * @param string $serviceUrl
+     * @param string $appKey
+     * @param string $appSecret
+     * @param string $token
+     *
+     * @return \RetailCrm\TopClient\TopClient
+     * @throws \RetailCrm\Component\Exception\ValidationException
+     */
+    public static function createClient(
+        string $serviceUrl,
+        string $appKey,
+        string $appSecret,
+        string $token = ''
+    ): TopClient {
+        $appData = new AppData($serviceUrl, $appKey, $appSecret);
+        $builder = TopClientBuilder::create()
+            ->setContainer(ContainerBuilder::create()->build())
+            ->setAppData($appData);
+
+        if ('' !== $token) {
+            $builder->setAuthenticator(new TokenAuthenticator($token));
+        }
+
+        return $builder->build();
+    }
+}

src/TopClient/TopClient.php

@@ -108,6 +108,7 @@ class TopClient implements TopClientInterface
     public function validateSelf(): void
     {
         $this->validate($this);
+        $this->validate($this->appData);
     }
 
     /**

tests/RetailCrm/Tests/Factory/TopClientFactoryTest.php

@@ -0,0 +1,41 @@
+<?php
+
+/**
+ * PHP version 7.3
+ *
+ * @category TopClientFactoryTest
+ * @package  RetailCrm\Tests\Factory
+ */
+namespace RetailCrm\Tests\Factory;
+
+use RetailCrm\Component\AppData;
+use RetailCrm\Component\Exception\ValidationException;
+use RetailCrm\Factory\TopClientFactory;
+use RetailCrm\Test\TestCase;
+
+/**
+ * Class TopClientFactoryTest
+ *
+ * @category TopClientFactoryTest
+ * @package  RetailCrm\Tests\Factory
+ */
+class TopClientFactoryTest extends TestCase
+{
+    public function testCreateClient(): void
+    {
+        $client = TopClientFactory::createClient(
+            AppData::OVERSEAS_ENDPOINT,
+            'appKey',
+            'appSecret',
+            'token'
+        );
+
+        self::assertNotEmpty($client);
+    }
+
+    public function testCreateClientException(): void
+    {
+        $this->expectException(ValidationException::class);
+        TopClientFactory::createClient('https://example.com', 'appKey', 'appSecret');
+    }
+}