Updating MWS client to set API version on-the-fly

Mws/Command/AbstractMwsCommand.php

@@ -23,7 +23,11 @@
  */
 class AbstractMwsCommand extends AbstractCommand
 {
-
+    /**
+     * @var string API version
+     */
+    protected $version = '2009-01-01';
+
     /**
      * @var string MWS operation name
      */
@@ -42,6 +46,12 @@ class AbstractMwsCommand extends AbstractCommand
      */
     protected function build()
     {
+        // Hack, set API version on the fly - different sections have different API versions
+        $observers = $this->getClient()->getEventManager()->getAttached('Guzzle\Aws\QueryStringAuthPlugin');
+        foreach($observers as $observer) {
+            $observer->setApiVersion($this->version);
+        }
+
         if (!$this->action) {
             // @codeCoverageIgnoreStart
             throw new \Exception('You must define an action name');

Mws/Command/AbstractMwsOrderCommand.php

@@ -7,6 +7,9 @@
 
 namespace Guzzle\Aws\Mws\Command;
 
+use Guzzle\Aws\QueryStringAuthPlugin;
+use Guzzle\Aws\Signature\SignatureV2;
+
 /**
  * Base class order MWS Order API commands
  *
@@ -17,13 +20,18 @@
  */
 class AbstractMwsOrderCommand extends AbstractMwsCommand
 {
-
+    /**
+     * @var string API version
+     */
+    protected $version = '2011-01-01';
+
     /**
      * Build the HTTP request
      */
     protected function build()
     {
         parent::build();
+
         // Change path
         $this->getRequest()->setPath('/Orders/2011-01-01');
 

QueryStringAuthPlugin.php

@@ -60,6 +60,20 @@ public function getApiVersion()
     {
         return $this->apiVersion;
     }
+
+    /**
+     * Set the API version of the service
+     * 
+     * @param string $version
+     * 
+     * @return QueryStringAuthPlugin 
+     */
+    public function setApiVersion($version)
+    {
+        $this->apiVersion = $version;
+
+        return $this;
+    }
 
     /**
      * Add required query string fields to a request