#region CPL License
/*
Nuclex.NAnt.Tasks
Copyright (C) 2009 Nuclex Development Labs

This library is free software; you can redistribute it and/or
modify it under the terms of the IBM Common Public License as
published by the IBM Corporation; either version 1.0 of the
License, or (at your option) any later version.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
IBM Common Public License for more details.

You should have received a copy of the IBM Common Public
License along with this library
*/
#endregion

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

using Microsoft.Win32;

using NAnt.Core;
using NAnt.Core.Attributes;

namespace Nuclex.NAnt.Tasks {

  /// <summary>Exports a working copy from a subversion repository</summary>
  [TaskName("subversion-export")]
  public class SubversionExportTask : Task {

    /// <summary>Initializes a new subversion export task</summary>
    public SubversionExportTask() {
      this.toDirectory = new DirectoryInfo(".");
    }

    /// <summary>URL of the subversion repository</summary>
    [TaskAttribute("url"), StringValidator(AllowEmpty = false)]
    public string Url {
      get { return this.url; }
      set { this.url = value; }
    }

    /// <summary>Directory into which the working copy will be checked out</summary>
    [TaskAttribute("todir"), StringValidator(AllowEmpty = false)]
    public DirectoryInfo ToDirectory {
      get { return this.toDirectory; }
      set { this.toDirectory = value; }
    }

    /// <summary>Name of the user with which to access the subversion repository</summary>
    [TaskAttribute("username")]
    public string UserName {
      get { return this.userName; }
      set { this.userName = value; }
    }

    /// <summary>Password by which to log in to the subversion repository</summary>
    [TaskAttribute("password")]
    public string Password {
      get { return this.password; }
      set { this.password = value; }
    }

    /// <summary>Password by which to log in to the subversion repository</summary>
    [TaskAttribute("revision")]
    public string Revision {
      get { return this.revision; }
      set { this.revision = value; }
    }

    /// <summary>Executes the task</summary>
    protected override void ExecuteTask() {
      this.Log(
        Level.Info,
        "Exporting '{0}' to '{1}'.",
        this.url,
        this.toDirectory.FullName
      );

      StringBuilder commandLineBuilder = new StringBuilder(256);
      commandLineBuilder.AppendFormat("export {0}", this.url);

      if(this.revision != null) {
        commandLineBuilder.AppendFormat(" --revision {0}", this.revision);
      }
      if(this.userName != null) {
        commandLineBuilder.AppendFormat(" --username {0}", this.userName);
      }
      if(this.password != null) {
        commandLineBuilder.AppendFormat(" --password {0}", this.password);
      }

      commandLineBuilder.AppendFormat(
        " --no-auth-cache --non-interactive --trust-server-cert {0}",
        this.toDirectory.FullName
      );

      try {
        Subversion.Run(".", commandLineBuilder.ToString());
      }
      catch(InvalidOperationException exception) {
        throw new BuildException(
          "Error during Subversion export operation: " + exception.Message,
          this.Location
        );
      }
    }

    /// <summary>URL of the subversion repository</summary>
    private string url;
    /// <summary>Directory to extract to</summary>
    private DirectoryInfo toDirectory;

    /// <summary>Revision number, date or name to check out</summary>
    private string revision;
    /// <summary>User name by which to log in to the subversion repository</summary>
    private string userName;
    /// <summary>Password to use for logging in to the subversion repository</summary>
    private string password;

  }

} // namespace Nuclex.NAnt.Tasks