command_request.h

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/*
 * Copyright (C) 2022 The Android Open Source Project
 *
 * 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.
 */
 
#pragma once
 
#include <sys/socket.h>
#include <sys/types.h>
 
#include <initializer_list>
#include <string>
#include <string_view>
#include <unordered_map>
#include <vector>
 
#include "cuttlefish/host/commands/cvd/cli/selector/selector_common_parser.h"
#include "cuttlefish/result/result.h"
 
namespace cuttlefish {
 
class CommandRequest {
 public:
  const std::unordered_map<std::string, std::string>& Env() const {
    return env_;
  }
 
  const selector::SelectorOptions& Selectors() const { return selectors_; }
 
  const std::string& Subcommand() const { return subcommand_; }
  const std::vector<std::string>& SubcommandArguments() const {
    return subcommand_arguments_;
  }
 
 private:
  friend class CommandRequestBuilder;
  CommandRequest(std::vector<std::string> args,
                 std::unordered_map<std::string, std::string> env,
                 selector::SelectorOptions selectors);
 
  std::vector<std::string> args_;
  std::unordered_map<std::string, std::string> env_;
  selector::SelectorOptions selectors_;
 
  std::string subcommand_;
  std::vector<std::string> subcommand_arguments_;
};
 
class CommandRequestBuilder {
 public:
  CommandRequestBuilder() = default;
 
  template <typename T>
  CommandRequestBuilder& AddArguments(T&& args) & {
    for (auto&& arg : args) {
      args_.emplace_back(arg);
    }
    return *this;
  }
 
  template <typename T>
  CommandRequestBuilder AddArguments(T&& args) && {
    for (auto&& arg : args) {
      args_.emplace_back(arg);
    }
    return *this;
  }
 
  CommandRequestBuilder& AddArguments(
      std::initializer_list<std::string_view>) &;
  CommandRequestBuilder AddArguments(
      std::initializer_list<std::string_view>) &&;
 
  CommandRequestBuilder& SetSelectorOptions(
      selector::SelectorOptions selectors) & {
    selector_options_ = std::move(selectors);
    return *this;
  }
 
  CommandRequestBuilder SetSelectorOptions(
      selector::SelectorOptions selectors) && {
    selector_options_ = std::move(selectors);
    return *this;
  }
 
  CommandRequestBuilder& SetEnv(std::unordered_map<std::string, std::string>) &;
  CommandRequestBuilder SetEnv(std::unordered_map<std::string, std::string>) &&;
 
  CommandRequestBuilder& AddEnvVar(std::string key, std::string val) &;
  CommandRequestBuilder AddEnvVar(std::string key, std::string val) &&;
 
  Result<CommandRequest> Build() &&;
 
 private:
  std::vector<std::string> args_;
  std::unordered_map<std::string, std::string> env_;
  selector::SelectorOptions selector_options_;
};
 
// e.g. cvd start --help, cvd stop -help, cvd fleet -h
Result<bool> HasHelpFlag(const std::vector<std::string>& args);
 
}  // namespace cuttlefish