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 * modification, are permitted provided that the following conditions are
 * met:
 *
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 * notice, this list of conditions and the following disclaimer.
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 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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// Generates Objective C gRPC service interface out of Protobuf IDL.

#include <memory>

#include "src/compiler/config.h"
#include "src/compiler/objective_c_generator.h"
#include "src/compiler/objective_c_generator_helpers.h"

class ObjectiveCGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
 public:
  ObjectiveCGrpcGenerator() {}
  virtual ~ObjectiveCGrpcGenerator() {}

  virtual bool Generate(const grpc::protobuf::FileDescriptor *file,
                        const grpc::string &parameter,
                        grpc::protobuf::compiler::GeneratorContext *context,
                        grpc::string *error) const {

    if (file->service_count() == 0) {
      // No services.  Do nothing.
      return true;
    }

    for (int i = 0; i < file->service_count(); i++) {
      const grpc::protobuf::ServiceDescriptor *service = file->service(i);
      grpc::string file_name = grpc_objective_c_generator::StubFileName(
          service->name());

      // Generate .pb.h
      grpc::string header_code = grpc_objective_c_generator::GetHeader(
          service, grpc_objective_c_generator::MessageHeaderName(file));
      std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> header_output(
        context->Open(file_name + ".pb.h"));
      grpc::protobuf::io::CodedOutputStream header_coded_out(
          header_output.get());
      header_coded_out.WriteRaw(header_code.data(), header_code.size());

      // Generate .pb.m
      grpc::string source_code = grpc_objective_c_generator::GetSource(service);
      std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> source_output(
        context->Open(file_name + ".pb.m"));
      grpc::protobuf::io::CodedOutputStream source_coded_out(
          source_output.get());
      source_coded_out.WriteRaw(source_code.data(), source_code.size());
    }

    return true;
  }

 private:
  // Insert the given code into the given file at the given insertion point.
  void Insert(grpc::protobuf::compiler::GeneratorContext *context,
              const grpc::string &filename, const grpc::string &insertion_point,
              const grpc::string &code) const {
    std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
        context->OpenForInsert(filename, insertion_point));
    grpc::protobuf::io::CodedOutputStream coded_out(output.get());
    coded_out.WriteRaw(code.data(), code.size());
  }
};

int main(int argc, char *argv[]) {
  ObjectiveCGrpcGenerator generator;
  return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
}