fuchsia_web/shell/remote_debugging_port.cc

// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "fuchsia_web/shell/remote_debugging_port.h"

#include "base/command_line.h"
#include "base/logging.h"
#include "base/strings/string_number_conversions.h"

constexpr char kRemoteDebuggingPortSwitch[] = "remote-debugging-port";

std::optional<uint16_t> GetRemoteDebuggingPort(
    const base::CommandLine& command_line) {
  if (!command_line.HasSwitch(kRemoteDebuggingPortSwitch)) {
    return std::nullopt;
  }
  std::string port_str =
      command_line.GetSwitchValueNative(kRemoteDebuggingPortSwitch);
  int port_parsed;
  if (base::StringToInt(port_str, &port_parsed) && port_parsed >= 0 &&
      port_parsed <= 65535) {
    return static_cast<uint16_t>(port_parsed);
  }
  LOG(ERROR) << "Invalid value for --remote-debugging-port [" << port_str
             << "], must be an integer in the "
                "range of 0-65535.";
  return std::nullopt;
}