feat(Messages): add ProductImageAdded message

Closes #314

src/Core/Model/Message/ProductImageAddedMessage.php

@@ -0,0 +1,53 @@
+<?php
+/**
+ * @author @jayS-de <jens.schulze@commercetools.de>
+ */
+
+namespace Commercetools\Core\Model\Message;
+
+use Commercetools\Core\Model\Common\DateTimeDecorator;
+use Commercetools\Core\Model\Common\Image;
+use Commercetools\Core\Model\Common\Reference;
+use Commercetools\Core\Model\Product\ProductProjection;
+use DateTime;
+
+/**
+ * @package Commercetools\Core\Model\Message
+ * @link https://dev.commercetools.com/http-api-projects-messages.html#productimageadded-message
+ * @method string getId()
+ * @method ProductImageAddedMessage setId(string $id = null)
+ * @method int getVersion()
+ * @method ProductImageAddedMessage setVersion(int $version = null)
+ * @method DateTimeDecorator getCreatedAt()
+ * @method ProductImageAddedMessage setCreatedAt(DateTime $createdAt = null)
+ * @method DateTimeDecorator getLastModifiedAt()
+ * @method ProductImageAddedMessage setLastModifiedAt(DateTime $lastModifiedAt = null)
+ * @method int getSequenceNumber()
+ * @method ProductImageAddedMessage setSequenceNumber(int $sequenceNumber = null)
+ * @method Reference getResource()
+ * @method ProductImageAddedMessage setResource(Reference $resource = null)
+ * @method int getResourceVersion()
+ * @method ProductImageAddedMessage setResourceVersion(int $resourceVersion = null)
+ * @method string getType()
+ * @method ProductImageAddedMessage setType(string $type = null)
+ * @method int getVariantId()
+ * @method ProductImageAddedMessage setVariantId(int $variantId = null)
+ * @method Image getImage()
+ * @method ProductImageAddedMessage setImage(Image $image = null)
+ * @method bool getStaged()
+ * @method ProductImageAddedMessage setStaged(bool $staged = null)
+ */
+class ProductImageAddedMessage extends Message
+{
+    const MESSAGE_TYPE = 'ProductImageAdded';
+
+    public function fieldDefinitions()
+    {
+        $definitions = parent::fieldDefinitions();
+        $definitions['variantId'] = [static::TYPE => 'int'];
+        $definitions['image'] = [static::TYPE => Image::class];
+        $definitions['staged'] = [static::TYPE => 'bool'];
+
+        return $definitions;
+    }
+}