src/AddressBook/Program.cs

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// http://github.com/jskeet/dotnet-protobufs/
// Original C++/Java/Python code:
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
using System;

namespace Google.ProtocolBuffers.Examples.AddressBook
{
  /// <summary>
  /// Entry point. Repeatedly prompts user for an action to take, delegating actual behaviour
  /// to individual actions. Each action has its own Main method, so that it can be used as an
  /// invidual complete program.
  /// </summary>
  class Program {
    static int Main(string[] args) {
      if (args.Length > 1) {
        Console.Error.WriteLine("Usage: AddressBook [file]");
        Console.Error.WriteLine("If the filename isn't specified, \"addressbook.data\" is used instead.");
        return 1;
      }
      string addressBookFile = args.Length > 0 ? args[0] : "addressbook.data";

      bool stopping = false;
      while (!stopping) {
        Console.WriteLine("Options:");
        Console.WriteLine("  L: List contents");
        Console.WriteLine("  A: Add new person");
        Console.WriteLine("  Q: Quit");
        Console.Write("Action? ");
        Console.Out.Flush();
        char choice = Console.ReadKey().KeyChar;
        Console.WriteLine();
        try {
          switch (choice) {
            case 'A':
            case 'a':
              AddPerson.Main(new string[] { addressBookFile });
              break;
            case 'L':
            case 'l':
              ListPeople.Main(new string[] { addressBookFile });
              break;
            case 'Q':
            case 'q':
              stopping = true;
              break;
            default:
              Console.WriteLine("Unknown option: {0}", choice);
              break;
          }
        } catch (Exception e) {
          Console.WriteLine("Exception executing action: {0}", e);
        }
        Console.WriteLine();
      } 
      return 0;
    }
  }
}