yast/yast-network

# Copyright (c) [2019] SUSE LLC
#
# All Rights Reserved.
#
# This program is free software; you can redistribute it and/or modify it
# under the terms of version 2 of the GNU General Public License as published
# by the Free Software Foundation.
#
# This program 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 GNU General Public License for
# more details.
#
# You should have received a copy of the GNU General Public License along
# with this program; if not, contact SUSE LLC.
#
# To contact SUSE LLC about this file by physical or electronic mail, you may
# find current contact information at www.suse.com.

Yast.import "IP"
Yast.import "Popup"

require "ipaddr"

require "cwm/common_widgets"
require "cwm/custom_widget"

module Y2Network
  module Widgets
    class Destination < CWM::CustomWidget
      # @param route [Y2Network::Route] route to modify by widget
      def initialize(route)
        super()
        textdomain "network"

        @route = route
      end

      def contents
        HBox(
          CheckBox(Id(:default), Opt(:notify, :hstretch), _("Default Route")),
          InputField(Id(:destination), Opt(:hstretch), _("&Destination"))
        )
      end

      def help
        _(
          "<p><b>Default Route</b> matches all destination for a given IP " \
          "address family as long as no specific route matches. <b>Destination</b>" \
          " specifies the IP address (in CIDR format) for which the route applies.</p>"
        )
      end

      def handle
        default_value ? disable_destination : enable_destination

        nil
      end

      def init
        Yast::UI.ChangeWidget(Id(:destination), :ValidChars, Yast::IP.ValidChars + "/")
        val = @route.to
        Yast::UI.ChangeWidget(Id(:default), :Value, val == :default)
        if val != :default
          Yast::UI.ChangeWidget(Id(:destination), :Value, (val.to_s + "/" + val.prefix.to_s))
        end
        handle
      end

      def validate
        return true if valid_destination?

        Yast::Popup.Error(_("Destination is invalid."))
        Yast::UI.SetFocus(Id(:destination))
        false
      end

      def store
        @route.to = default_value ? :default : IPAddr.new(destination_value)
      end

    private

      def default_value
        Yast::UI.QueryWidget(Id(:default), :Value)
      end

      def destination_value
        Yast::UI.QueryWidget(Id(:destination), :Value)
      end

      def enable_destination
        Yast::UI.ChangeWidget(Id(:destination), :Enabled, true)
      end

      def disable_destination
        Yast::UI.ChangeWidget(Id(:destination), :Enabled, false)
      end

      # Validates user's input obtained from destination field
      def valid_destination?
        return true if default_value

        ip = destination_value[/^[^\/]+/]
        Yast::IP.Check(ip)
      end
    end
  end
end