dynamite: Implement urlencoded requests

packages/dynamite/lib/src/openapi_builder.dart

@@ -606,6 +606,8 @@ class OpenAPIBuilder implements Builder {
                               final value = result.encode(
                                 result.serialize(_toDartName(parameter.name)),
                                 onlyChildren: isPlainList && parameter.in_ == 'query',
+                                // Objects inside the query always have to be interpreted in some way
+                                mimeType: 'application/json',
                               );
                               if (defaultValueCode != null && parameter.in_ != 'path') {
                                 code.write('if (${_toDartName(parameter.name)} != $defaultValueCode) {');
@@ -654,6 +656,7 @@ class OpenAPIBuilder implements Builder {
                                 );
                                 switch (mimeType) {
                                   case 'application/json':
+                                  case 'application/x-www-form-urlencoded':
                                     final nullable = _isParameterNullable(
                                       operation.requestBody!.required,
                                       mediaType.schema?.default_,
@@ -672,7 +675,7 @@ class OpenAPIBuilder implements Builder {
                                       code.write('if (${_toDartName(result.name)} != null) {');
                                     }
                                     code.write(
-                                      'body = Uint8List.fromList(utf8.encode(${result.encode(result.serialize(_toDartName(result.name)))}));',
+                                      'body = Uint8List.fromList(utf8.encode(${result.encode(result.serialize(_toDartName(result.name)), mimeType: mimeType)}));',
                                     );
                                     if (nullable) {
                                       code.write('}');
@@ -773,6 +776,10 @@ class OpenAPIBuilder implements Builder {
                                         dataType = 'Uint8List';
                                         dataValue = 'response.body';
                                         break;
+                                      case 'text/plain':
+                                        dataType = 'String';
+                                        dataValue = 'utf8.decode(response.body)';
+                                        break;
                                       default:
                                         throw Exception('Can not parse mime type "$mimeType"');
                                     }

packages/dynamite/lib/src/type_result/base.dart

@@ -7,7 +7,11 @@ class TypeResultBase extends TypeResult {
   String serialize(final String object) => object;
 
   @override
-  String encode(final String object, {final bool onlyChildren = false}) =>
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  }) =>
       name == 'String' ? object : '$object.toString()';
 
   @override

packages/dynamite/lib/src/type_result/enum.dart

@@ -12,7 +12,12 @@ class TypeResultEnum extends TypeResult {
   String serialize(final String object) => '$object.value';
 
   @override
-  String encode(final String object, {final bool onlyChildren = false}) => subType.encode(object);
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  }) =>
+      subType.encode(object);
 
   @override
   String deserialize(final String object) => '$name.fromValue($object as ${subType.name})';

packages/dynamite/lib/src/type_result/list.dart

@@ -14,11 +14,23 @@ class TypeResultList extends TypeResult {
   String serialize(final String object) => '$object.map((final e) => ${subType.serialize('e')}).toList()';
 
   @override
-  String encode(final String object, {final bool onlyChildren = false}) {
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  }) {
     if (onlyChildren) {
       return '$object.map((final e) => ${subType.encode('e')}).toList()';
     }
+
+    switch (mimeType) {
+      case 'application/json':
         return 'json.encode($object)';
+      case 'application/x-www-form-urlencoded':
+        return 'Uri(queryParameters: $object).query';
+      default:
+        throw Exception('Can not encode mime type "$mimeType"');
+    }
   }
 
   @override

packages/dynamite/lib/src/type_result/map.dart

@@ -12,7 +12,20 @@ class TypeResultMap extends TypeResult {
   String serialize(final String object) => object;
 
   @override
-  String encode(final String object, {final bool onlyChildren = false}) => 'json.encode($object)';
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  }) {
+    switch (mimeType) {
+      case 'application/json':
+        return 'json.encode($object)';
+      case 'application/x-www-form-urlencoded':
+        return 'Uri(queryParameters: $object).query';
+      default:
+        throw Exception('Can not encode mime type "$mimeType"');
+    }
+  }
 
   @override
   String deserialize(final String object) => '($object as Map<String, ${subType.name}>)';

packages/dynamite/lib/src/type_result/object.dart

@@ -17,7 +17,20 @@ class TypeResultObject extends TypeResult {
   }
 
   @override
-  String encode(final String object, {final bool onlyChildren = false}) => 'json.encode($object)';
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  }) {
+    switch (mimeType) {
+      case 'application/json':
+        return 'json.encode($object)';
+      case 'application/x-www-form-urlencoded':
+        return 'Uri(queryParameters: $object).query';
+      default:
+        throw Exception('Can not encode mime type "$mimeType"');
+    }
+  }
 
   @override
   String deserialize(final String object) {

packages/dynamite/lib/src/type_result/type_result.dart

@@ -11,5 +11,9 @@ abstract class TypeResult {
 
   String decode(final String object);
 
-  String encode(final String object, {final bool onlyChildren = false});
+  String encode(
+    final String object, {
+    final bool onlyChildren = false,
+    final String? mimeType,
+  });
 }