text: /*
   *
   * Copyright 2015 gRPC authors.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   *
   */
  
  // Generates Node gRPC service interface out of Protobuf IDL.
  
  #include <memory>
  
  #include "src/compiler/config.h"
  #include "src/compiler/node_generator.h"
  #include "src/compiler/node_generator_helpers.h"
  
  using grpc_node_generator::GenerateFile;
  using grpc_node_generator::GetJSServiceFilename;
  
  class NodeGrpcGenerator : public grpc::protobuf::compiler::CodeGenerator {
   public:
    NodeGrpcGenerator() {}
    ~NodeGrpcGenerator() {}
  
    uint64_t GetSupportedFeatures() const override {
      return FEATURE_PROTO3_OPTIONAL;
    }
  
    bool Generate(const grpc::protobuf::FileDescriptor* file,
                  const std::string& parameter,
                  grpc::protobuf::compiler::GeneratorContext* context,
                  std::string* error) const override {
      grpc_node_generator::Parameters generator_parameters;
      generator_parameters.minimum_node_version = 4;
  
      if (!parameter.empty()) {
        std::vector<std::string> parameters_list =
            grpc_generator::tokenize(parameter, ",");
        for (auto parameter_string = parameters_list.begin();
             parameter_string != parameters_list.end(); parameter_string++) {
          std::vector<std::string> param =
              grpc_generator::tokenize(*parameter_string, "=");
          if (param[0] == "minimum_node_version") {
            sscanf(param[1].c_str(), "%d",
                   &generator_parameters.minimum_node_version);
          } else {
            *error = std::string("Unknown parameter: ") + *parameter_string;
            return false;
          }
        }
      }
  
      std::string code = GenerateFile(file, generator_parameters);
      if (code.size() == 0) {
        return true;
      }
  
      // Get output file name
      std::string file_name = GetJSServiceFilename(file->name());
  
      std::unique_ptr<grpc::protobuf::io::ZeroCopyOutputStream> output(
          context->Open(file_name));
      grpc::protobuf::io::CodedOutputStream coded_out(output.get());
      coded_out.WriteRaw(code.data(), code.size());
      return true;
    }
  };
  
  int main(int argc, char* argv[]) {
    NodeGrpcGenerator generator;
    return grpc::protobuf::compiler::PluginMain(argc, argv, &generator);
  }
  