Fix Swagger-generated operation parameter names for "body" parameters

These were previously all output as a string "$body". This improves Swagger-generated API clients and compatibility with swagger-codegen & janephp/openapi generator.

This caused the following issues:

- Variable variable output in janephp/openapi code generation
- Incorrect code output (multiple models called "Body") in janephp/openapi
- "Anonymous" class naming in swagger-codegen generated clients (approx 20 models called Body1, Body2, Body3 are output for a Magento Enterprise schema)

The new format is: operationNamePostBody. Operation Id is guaranteed to be unique under the Open API specification. Changing the body parameter in the schema should also not affect clients conforming to the specification.

Author: Carey Sizer

app/code/Magento/Webapi/Model/Rest/Swagger/Generator.php

@@ -204,14 +204,14 @@ protected function getGeneralInfo()
     protected function generatePathInfo($methodName, $httpMethodData, $tagName)
     {
         $methodData = $httpMethodData[Converter::KEY_METHOD];
+        $operationId = $this->typeProcessor->getOperationName($tagName, $methodData[Converter::KEY_METHOD]) . ucfirst($methodName);
         $pathInfo = [
             'tags' => [$tagName],
             'description' => $methodData['documentation'],
-            'operationId' => $this->typeProcessor->getOperationName($tagName, $methodData[Converter::KEY_METHOD]) .
-                ucfirst($methodName)
+            'operationId' => $operationId,
         ];
 
-        $parameters = $this->generateMethodParameters($httpMethodData);
+        $parameters = $this->generateMethodParameters($httpMethodData, $operationId);
         if ($parameters) {
             $pathInfo['parameters'] = $parameters;
         }
@@ -265,11 +265,12 @@ protected function generateMethodResponses($methodData)
      * Generate parameters based on method data
      *
      * @param array $httpMethodData
+     * @param string $operationId
      * @return array
      * @SuppressWarnings(PHPMD.CyclomaticComplexity)
      * @SuppressWarnings(PHPMD.NPathComplexity)
      */
-    private function generateMethodParameters($httpMethodData)
+    private function generateMethodParameters($httpMethodData, $operationId)
     {
         $bodySchema = [];
         $parameters = [];
@@ -338,7 +339,7 @@ private function generateMethodParameters($httpMethodData)
 
         if ($bodySchema) {
             $bodyParam = [];
-            $bodyParam['name'] = '$body';
+            $bodyParam['name'] = $operationId . 'Body';
             $bodyParam['in'] = 'body';
             $bodyParam['schema'] = $bodySchema;
             $parameters[] = $bodyParam;

app/code/Magento/Webapi/Test/Unit/Model/Rest/Swagger/GeneratorTest.php

@@ -203,7 +203,7 @@ public function generateDataProvider()
                     ]
                 ],
                 // @codingStandardsIgnoreStart
-                '{"swagger":"2.0","info":{"version":"","title":""},"host":"magento.host","basePath":"/rest/default","schemes":["http://"],"tags":[{"name":"testModule5AllSoapAndRestV2","description":"AllSoapAndRestInterface"}],"paths":{"/V1/testModule5":{"post":{"tags":["testModule5AllSoapAndRestV2"],"description":"Add new item.","operationId":"' . self::OPERATION_NAME . 'Post","parameters":[{"name":"$body","in":"body","schema":{"required":["item"],"properties":{"item":{"$ref":"#/definitions/test-module5-v2-entity-all-soap-and-rest"}},"type":"object"}}],"responses":{"200":{"description":"200 Success.","schema":{"$ref":"#/definitions/test-module5-v2-entity-all-soap-and-rest"}},"401":{"description":"401 Unauthorized","schema":{"$ref":"#/definitions/error-response"}},"500":{"description":"Internal Server error","schema":{"$ref":"#/definitions/error-response"}},"default":{"description":"Unexpected error","schema":{"$ref":"#/definitions/error-response"}}}}}},"definitions":{"error-response":{"type":"object","properties":{"message":{"type":"string","description":"Error message"},"errors":{"$ref":"#/definitions/error-errors"},"code":{"type":"integer","description":"Error code"},"parameters":{"$ref":"#/definitions/error-parameters"},"trace":{"type":"string","description":"Stack trace"}},"required":["message"]},"error-errors":{"type":"array","description":"Errors list","items":{"$ref":"#/definitions/error-errors-item"}},"error-errors-item":{"type":"object","description":"Error details","properties":{"message":{"type":"string","description":"Error message"},"parameters":{"$ref":"#/definitions/error-parameters"}}},"error-parameters":{"type":"array","description":"Error parameters list","items":{"$ref":"#/definitions/error-parameters-item"}},"error-parameters-item":{"type":"object","description":"Error parameters item","properties":{"resources":{"type":"string","description":"ACL resource"},"fieldName":{"type":"string","description":"Missing or invalid field name"},"fieldValue":{"type":"string","description":"Incorrect field value"}}},"test-module5-v2-entity-all-soap-and-rest":{"type":"object","description":"Some Data Object","properties":{"price":{"type":"integer"}},"required":["price"]}}}'
+                '{"swagger":"2.0","info":{"version":"","title":""},"host":"magento.host","basePath":"/rest/default","schemes":["http://"],"tags":[{"name":"testModule5AllSoapAndRestV2","description":"AllSoapAndRestInterface"}],"paths":{"/V1/testModule5":{"post":{"tags":["testModule5AllSoapAndRestV2"],"description":"Add new item.","operationId":"' . self::OPERATION_NAME . 'Post","parameters":[{"name":"operationNamePostBody","in":"body","schema":{"required":["item"],"properties":{"item":{"$ref":"#/definitions/test-module5-v2-entity-all-soap-and-rest"}},"type":"object"}}],"responses":{"200":{"description":"200 Success.","schema":{"$ref":"#/definitions/test-module5-v2-entity-all-soap-and-rest"}},"401":{"description":"401 Unauthorized","schema":{"$ref":"#/definitions/error-response"}},"500":{"description":"Internal Server error","schema":{"$ref":"#/definitions/error-response"}},"default":{"description":"Unexpected error","schema":{"$ref":"#/definitions/error-response"}}}}}},"definitions":{"error-response":{"type":"object","properties":{"message":{"type":"string","description":"Error message"},"errors":{"$ref":"#/definitions/error-errors"},"code":{"type":"integer","description":"Error code"},"parameters":{"$ref":"#/definitions/error-parameters"},"trace":{"type":"string","description":"Stack trace"}},"required":["message"]},"error-errors":{"type":"array","description":"Errors list","items":{"$ref":"#/definitions/error-errors-item"}},"error-errors-item":{"type":"object","description":"Error details","properties":{"message":{"type":"string","description":"Error message"},"parameters":{"$ref":"#/definitions/error-parameters"}}},"error-parameters":{"type":"array","description":"Error parameters list","items":{"$ref":"#/definitions/error-parameters-item"}},"error-parameters-item":{"type":"object","description":"Error parameters item","properties":{"resources":{"type":"string","description":"ACL resource"},"fieldName":{"type":"string","description":"Missing or invalid field name"},"fieldValue":{"type":"string","description":"Incorrect field value"}}},"test-module5-v2-entity-all-soap-and-rest":{"type":"object","description":"Some Data Object","properties":{"price":{"type":"integer"}},"required":["price"]}}}'
                 // @codingStandardsIgnoreEnd
             ],
             [