Puppet::Type.type(:file).provide :posix do
  desc "Uses POSIX functionality to manage file ownership and permissions."

  confine :feature => :posix
  has_features :manages_symlinks

  include Puppet::Util::POSIX
  include Puppet::Util::Warnings

  require 'etc'

  def uid2name(id)
    return id.to_s if id.is_a?(Symbol) or id.is_a?(String)
    return nil if id > Puppet[:maximum_uid].to_i

    begin
      user = Etc.getpwuid(id)
    rescue TypeError, ArgumentError
      return nil
    end

    if user.uid == ""
      return nil
    else
      return user.name
    end
  end

  # Determine if the user is valid, and if so, return the UID
  def name2uid(value)
    Integer(value) rescue uid(value) || false
  end

  def gid2name(id)
    return id.to_s if id.is_a?(Symbol) or id.is_a?(String)
    return nil if id > Puppet[:maximum_uid].to_i

    begin
      group = Etc.getgrgid(id)
    rescue TypeError, ArgumentError
      return nil
    end

    if group.gid == ""
      return nil
    else
      return group.name
    end
  end

  def name2gid(value)
    Integer(value) rescue gid(value) || false
  end

  def owner
    unless stat = resource.stat
      return :absent
    end

    currentvalue = stat.uid

    # On OS X, files that are owned by -2 get returned as really
    # large UIDs instead of negative ones.  This isn't a Ruby bug,
    # it's an OS X bug, since it shows up in perl, too.
    if currentvalue > Puppet[:maximum_uid].to_i
      self.warning "Apparently using negative UID (#{currentvalue}) on a platform that does not consistently handle them"
      currentvalue = :silly
    end

    currentvalue
  end

  def owner=(should)
    # Set our method appropriately, depending on links.
    if resource[:links] == :manage
      method = :lchown
    else
      method = :chown
    end

    begin
      File.send(method, should, nil, resource[:path])
    rescue => detail
      raise Puppet::Error, "Failed to set owner to '#{should}': #{detail}", detail.backtrace
    end
  end

  def group
    return :absent unless stat = resource.stat

    currentvalue = stat.gid

    # On OS X, files that are owned by -2 get returned as really
    # large GIDs instead of negative ones.  This isn't a Ruby bug,
    # it's an OS X bug, since it shows up in perl, too.
    if currentvalue > Puppet[:maximum_uid].to_i
      self.warning "Apparently using negative GID (#{currentvalue}) on a platform that does not consistently handle them"
      currentvalue = :silly
    end

    currentvalue
  end

  def group=(should)
    # Set our method appropriately, depending on links.
    if resource[:links] == :manage
      method = :lchown
    else
      method = :chown
    end

    begin
      File.send(method, nil, should, resource[:path])
    rescue => detail
      raise Puppet::Error, "Failed to set group to '#{should}': #{detail}", detail.backtrace
    end
  end

  def mode
    if stat = resource.stat
      return (stat.mode & 007777).to_s(8).rjust(4, '0')
    else
      return :absent
    end
  end

  def mode=(value)
    begin
      File.chmod(value.to_i(8), resource[:path])
    rescue => detail
      error = Puppet::Error.new("failed to set mode #{mode} on #{resource[:path]}: #{detail.message}")
      error.set_backtrace detail.backtrace
      raise error
    end
  end
end