Fix enum encodable (#4594)

samples/client/petstore/swift4/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/APIs/FakeAPI.swift

@@ -223,7 +223,7 @@ open class FakeAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "query": query
+            "query": query.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<Void>.Type = PetstoreClientAPI.requestBuilderFactory.getNonDecodableBuilder()
@@ -331,17 +331,17 @@ open class FakeAPI {
             "integer": integer?.encodeToJSON(),
             "int32": int32?.encodeToJSON(),
             "int64": int64?.encodeToJSON(),
-            "number": number,
-            "float": float,
-            "double": double,
-            "string": string,
-            "pattern_without_delimiter": patternWithoutDelimiter,
-            "byte": byte,
-            "binary": binary,
+            "number": number.encodeToJSON(),
+            "float": float?.encodeToJSON(),
+            "double": double.encodeToJSON(),
+            "string": string?.encodeToJSON(),
+            "pattern_without_delimiter": patternWithoutDelimiter.encodeToJSON(),
+            "byte": byte.encodeToJSON(),
+            "binary": binary?.encodeToJSON(),
             "date": date?.encodeToJSON(),
             "dateTime": dateTime?.encodeToJSON(),
-            "password": password,
-            "callback": callback
+            "password": password?.encodeToJSON(),
+            "callback": callback?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -464,8 +464,8 @@ open class FakeAPI {
         let path = "/fake"
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String: Any?] = [
-            "enum_form_string_array": enumFormStringArray,
-            "enum_form_string": enumFormString?.rawValue
+            "enum_form_string_array": enumFormStringArray?.encodeToJSON(),
+            "enum_form_string": enumFormString?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -473,14 +473,14 @@ open class FakeAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "enum_query_string_array": enumQueryStringArray,
-            "enum_query_string": enumQueryString?.rawValue,
-            "enum_query_integer": enumQueryInteger?.rawValue,
-            "enum_query_double": enumQueryDouble?.rawValue
+            "enum_query_string_array": enumQueryStringArray?.encodeToJSON(),
+            "enum_query_string": enumQueryString?.encodeToJSON(),
+            "enum_query_integer": enumQueryInteger?.encodeToJSON(),
+            "enum_query_double": enumQueryDouble?.encodeToJSON()
         ])
         let nillableHeaders: [String: Any?] = [
-            "enum_header_string_array": enumHeaderStringArray,
-            "enum_header_string": enumHeaderString?.rawValue
+            "enum_header_string_array": enumHeaderStringArray?.encodeToJSON(),
+            "enum_header_string": enumHeaderString?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -537,8 +537,8 @@ open class FakeAPI {
             "int64_group": int64Group?.encodeToJSON()
         ])
         let nillableHeaders: [String: Any?] = [
-            "required_boolean_group": requiredBooleanGroup,
-            "boolean_group": booleanGroup
+            "required_boolean_group": requiredBooleanGroup.encodeToJSON(),
+            "boolean_group": booleanGroup?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -613,8 +613,8 @@ open class FakeAPI {
         let path = "/fake/jsonFormData"
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String: Any?] = [
-            "param": param,
-            "param2": param2
+            "param": param.encodeToJSON(),
+            "param2": param2.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)

samples/client/petstore/swift4/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/APIs/PetAPI.swift

@@ -87,7 +87,7 @@ open class PetAPI {
 
         let url = URLComponents(string: URLString)
         let nillableHeaders: [String: Any?] = [
-            "api_key": apiKey
+            "api_key": apiKey?.encodeToJSON()
         ]
         let headerParameters = APIHelper.rejectNilHeaders(nillableHeaders)
 
@@ -142,7 +142,7 @@ open class PetAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "status": status
+            "status": status.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<[Pet]>.Type = PetstoreClientAPI.requestBuilderFactory.getBuilder()
@@ -187,7 +187,7 @@ open class PetAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "tags": tags
+            "tags": tags.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<[Pet]>.Type = PetstoreClientAPI.requestBuilderFactory.getBuilder()
@@ -317,8 +317,8 @@ open class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String: Any?] = [
-            "name": name,
-            "status": status
+            "name": name?.encodeToJSON(),
+            "status": status?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -371,8 +371,8 @@ open class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String: Any?] = [
-            "additionalMetadata": additionalMetadata,
-            "file": file
+            "additionalMetadata": additionalMetadata?.encodeToJSON(),
+            "file": file?.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)
@@ -425,8 +425,8 @@ open class PetAPI {
         path = path.replacingOccurrences(of: "{petId}", with: petIdPostEscape, options: .literal, range: nil)
         let URLString = PetstoreClientAPI.basePath + path
         let formParams: [String: Any?] = [
-            "additionalMetadata": additionalMetadata,
-            "requiredFile": requiredFile
+            "additionalMetadata": additionalMetadata?.encodeToJSON(),
+            "requiredFile": requiredFile.encodeToJSON()
         ]
 
         let nonNullParameters = APIHelper.rejectNil(formParams)

samples/client/petstore/swift4/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/APIs/UserAPI.swift

@@ -235,8 +235,8 @@ open class UserAPI {
 
         var url = URLComponents(string: URLString)
         url?.queryItems = APIHelper.mapValuesToQueryItems([
-            "username": username,
-            "password": password
+            "username": username.encodeToJSON(),
+            "password": password.encodeToJSON()
         ])
 
         let requestBuilder: RequestBuilder<String>.Type = PetstoreClientAPI.requestBuilderFactory.getBuilder()

samples/client/petstore/swift4/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Extensions.swift

@@ -35,6 +35,10 @@ extension String: JSONEncodable {
     func encodeToJSON() -> Any { return self as Any }
 }
 
+extension RawRepresentable where RawValue: JSONEncodable {
+    func encodeToJSON() -> Any { return self.rawValue as Any }
+}
+
 private func encodeIfPossible<T>(_ object: T) -> Any {
     if let encodableObject = object as? JSONEncodable {
         return encodableObject.encodeToJSON()
@@ -84,6 +88,12 @@ extension Date: JSONEncodable {
     }
 }
 
+extension URL: JSONEncodable {
+    func encodeToJSON() -> Any {
+        return self
+    }
+}
+
 extension UUID: JSONEncodable {
     func encodeToJSON() -> Any {
         return self.uuidString