[PHP][Symfony] Enhancements (#6615)

* Removed commented code

* Input validation is now supported as strict JSON validation

* [PHP][Symfony] Improve the implementation
Closes #6614

* Generated code is tested to assure it compiles and updated README to dynamically load dependencies via composer

* Updated shell script because shippable tests were failing

samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php

@@ -0,0 +1,182 @@
+<?php
+/**
+ * Controller
+ *
+ * PHP version 5
+ *
+ * @category Class
+ * @package  Swagger\Server\Controller
+ * @author   Swagger Codegen team
+ * @link     https://github.com/swagger-api/swagger-codegen
+ */
+
+/**
+ * Swagger Petstore
+ *
+ * This is a sample server Petstore server.  You can find out more about Swagger at [http://swagger.io](http://swagger.io) or on [irc.freenode.net, #swagger](http://swagger.io/irc/).  For this sample, you can use the api key `special-key` to test the authorization filters.
+ *
+ * OpenAPI spec version: 1.0.0
+ * Contact: apiteam@swagger.io
+ * Generated by: https://github.com/swagger-api/swagger-codegen.git
+ *
+ */
+
+/**
+ * NOTE: This class is auto generated by the swagger code generator program.
+ * https://github.com/swagger-api/swagger-codegen
+ * Do not edit the class manually.
+ */
+
+namespace Swagger\Server\Controller;
+
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpKernel\Exception\HttpException;
+use Swagger\Server\Service\SerializerInterface;
+use Swagger\Server\Service\ValidatorInterface;
+
+/**
+ * Controller Class Doc Comment
+ *
+ * @category Class
+ * @package  Swagger\Server\Controller
+ * @author   Swagger Codegen team
+ * @link     https://github.com/swagger-api/swagger-codegen
+ */
+class Controller
+{
+    protected $validator;
+    protected $serializer;
+    protected $apiServer;
+
+    public function setValidator(ValidatorInterface $validator)
+    {
+        $this->validator = $validator;
+    }
+
+    public function setSerializer(SerializerInterface $serializer)
+    {
+        $this->serializer = $serializer;
+    }
+
+    public function setApiServer($server)
+    {
+        $this->apiServer = $server;
+    }
+
+    /**
+     * This will return a response with code 400. Usage example:
+     *     return $this->createBadRequestResponse('Unable to access this page!');
+     *
+     * @param string $message A message
+     *
+     * @return Response
+     */
+    public function createBadRequestResponse($message = 'Bad Request.')
+    {
+        return new Response($message, 400);
+    }
+
+    /**
+     * This will return an error response. Usage example:
+     *     return $this->createErrorResponse(new UnauthorizedHttpException());
+     *
+     * @param HttpException $exception An HTTP exception
+     *
+     * @return Response
+     */
+    public function createErrorResponse(HttpException $exception)
+    {
+        $statusCode = $exception->getStatusCode();
+        $headers    = array_merge($exception->getHeaders(), ['Content-Type' => 'application/json']);
+
+        $json = $this->exceptionToArray($exception);
+        $json['statusCode'] = $statusCode;
+
+        return new Response(json_encode($json, 15, 512), $statusCode, $headers);
+    }
+
+    /**
+     * Serializes data to a given type format.
+     *
+     * @param mixed  $data   The data to serialize.
+     * @param string $class  The source data class.
+     * @param string $format The target serialization format.
+     *
+     * @return string A serialized data string.
+     */
+    protected function serialize($data, $format)
+    {
+        return $this->serializer->serialize($data, $format);
+    }
+
+    /**
+     * Deserializes data from a given type format.
+     *
+     * @param string $data   The data to deserialize.
+     * @param string $class  The target data class.
+     * @param string $format The source serialization format.
+     *
+     * @return mixed A deserialized data.
+     */
+    protected function deserialize($data, $class, $format)
+    {
+        return $this->serializer->deserialize($data, $class, $format);
+    }
+
+    protected function validate($data, $asserts = null)
+    {
+        $errors = $this->validator->validate($data, $asserts);
+
+        if (count($errors) > 0) {
+            $errorsString = (string)$errors;
+            return $this->createBadRequestResponse($errorsString);
+        }
+    }
+
+    /**
+     * Converts an exception to a serializable array.
+     *
+     * @param \Exception|null $exception
+     *
+     * @return array
+     */
+    private function exceptionToArray(\Exception $exception = null)
+    {
+        if (null === $exception) {
+            return null;
+        }
+
+        return [
+            'message'  => $exception->getMessage(),
+            'type'     => get_class($exception),
+            'previous' => $this->exceptionToArray($exception->getPrevious()),
+        ];
+    }
+
+    protected function getOutputFormat($accept, array $produced)
+    {
+        // Figure out what the client accepts
+        $accept = preg_split("/[\s,]+/", $accept);
+        
+        if (in_array('*/*', $accept) || in_array('application/*', $accept)) {
+            // Prefer JSON if the client has no preference
+            if (in_array('application/json', $produced)) {
+                return 'application/json';
+            }
+            if (in_array('application/xml', $produced)) {
+                return 'application/xml';
+            }
+        }
+
+        if (in_array('application/json', $accept) && in_array('application/json', $produced)) {
+            return 'application/json';
+        }
+
+        if (in_array('application/xml', $accept) && in_array('application/xml', $produced)) {
+            return 'application/xml';
+        }
+
+        // If we reach this point, we don't have a common ground between server and client
+        return null;
+    }
+}