refactor(dynamite): unify code generation

Signed-off-by: Nikolas Rimikis <leptopoda@users.noreply.github.com>

packages/dynamite/dynamite/lib/src/builder/client.dart

@@ -79,20 +79,20 @@ List<Class> generateDynamiteOverrides(final State state) => [
                       ..type = refer('HttpClientResponse'),
                   ),
                 )
-                ..body = Block.of([
+                ..body = Code('''
-                  const Code('String body;'),
+String body;
-                  const Code('try {'),
+try {
-                  const Code('body = await response.body;'),
+  body = await response.body;
-                  const Code('} on FormatException {'),
+} on FormatException {
-                  const Code("body = 'binary';"),
+  body = 'binary';
-                  const Code('}'),
+}
-                  const Code(''),
+
-                  Code('return ${state.classPrefix}ApiException('),
+return ${state.classPrefix}ApiException(
-                  const Code('response.statusCode,'),
+  response.statusCode,
-                  const Code('response.responseHeaders,'),
+  response.responseHeaders,
-                  const Code('body,'),
+  body,
-                  const Code(');'),
+);
-                ]),
+'''),
             ),
             Method(
               (final b) => b

packages/dynamite/dynamite/lib/src/builder/header_serializer.dart

@@ -85,26 +85,26 @@ Spec buildHeaderSerializer(final State state, final String identifier, final Ope
                     ..defaultTo = const Code('FullType.unspecified'),
                 ),
               )
-              ..body = Block.of([
+              ..body = Code('''
-                Code('final result = new ${state.classPrefix}${identifier}Builder();'),
+final result = new ${state.classPrefix}${identifier}Builder();
-                const Code(''),
+
-                const Code('final iterator = serialized.iterator;'),
+final iterator = serialized.iterator;
-                const Code('while (iterator.moveNext()) {'),
+while (iterator.moveNext()) {
-                const Code('final key = iterator.current! as String;'),
+  final key = iterator.current! as String;
-                const Code('iterator.moveNext();'),
+  iterator.moveNext();
-                const Code('final value = iterator.current! as String;'),
+  final value = iterator.current! as String;
-                const Code('switch (key) {'),
+  switch (key) {
-                ...deserializeProperty(state, identifier, spec, schema),
+    ${deserializeProperty(state, identifier, spec, schema).join('\n')}
-                const Code('}'),
+  }
-                const Code('}'),
+}
-                const Code(''),
+
-                const Code('return result.build();'),
+return result.build();
-              ]);
+''');
           }),
         ]),
     );
 
-Iterable<Code> deserializeProperty(
+Iterable<String> deserializeProperty(
   final State state,
   final String identifier,
   final OpenAPI spec,
@@ -121,15 +121,15 @@ Iterable<Code> deserializeProperty(
       nullable: isDartParameterNullable(schema.required?.contains(propertyName), propertySchema),
     );
 
-    yield Code("case '$propertyName':");
+    yield "case '$propertyName':";
     if (result.className != 'String') {
       if (result is TypeResultBase || result is TypeResultEnum) {
-        yield Code('result.${toDartName(propertyName)} = ${result.deserialize(result.decode('value!'))};');
+        yield 'result.${toDartName(propertyName)} = ${result.deserialize(result.decode('value!'))};';
       } else {
-        yield Code('result.${toDartName(propertyName)}.replace(${result.deserialize(result.decode('value!'))});');
+        yield 'result.${toDartName(propertyName)}.replace(${result.deserialize(result.decode('value!'))});';
       }
     } else {
-      yield Code('result.${toDartName(propertyName)} = value!;');
+      yield 'result.${toDartName(propertyName)} = value!;';
     }
   }
 }