yast/yast-caasp

# encoding: utf-8

# ------------------------------------------------------------------------------
# Copyright (c) 2017 SUSE LLC
#
#
# 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.
#
# To contact SUSE about this file by physical or electronic mail, you may find
# current contact information at www.suse.com.
# ------------------------------------------------------------------------------

require "yast"
require "installation/system_role"
require "cwm/widget"

Yast.import "CWM"
Yast.import "Popup"
Yast.import "Label"
Yast.import "IP"
Yast.import "Hostname"
Yast.import "NtpClient"

module Y2Caasp
  module Widgets
    # This widget is responsible of validating and storing the NTP server to use.
    class NtpServer < CWM::InputField
      extend Yast::I18n

      # @return [Array<String>] List of default servers
      attr_reader :default_servers

      # Constructor
      #
      # @params default_servers [Array<String>] List of servers
      def initialize(default_servers = [])
        @default_servers = default_servers
        textdomain "caasp"
      end

      # @return [String] Widget's label
      def label
        # TRANSLATORS: input field label
        _("N&TP Servers (comma or space separated)")
      end

      # Store the value of the input field if validates
      def store
        if servers.empty?
          # we need to reset the previous settings after going back
          Yast::NtpClient.ntp_selected = false
          Yast::NtpClient.modified = false
          return
        end

        Yast::NtpClient.ntp_selected = true
        Yast::NtpClient.modified = true
        Yast::NtpClient.ntp_conf.clear_pools
        servers.each { |server| Yast::NtpClient.ntp_conf.add_pool(server) }
        # run NTP as a service (not via cron)
        Yast::NtpClient.run_service = true
        Yast::NtpClient.synchronize_time = false
      end

      # Initializes the widget's value
      def init
        saved_servers = (role && role["ntp_servers"]) || default_servers
        self.value = saved_servers.join(" ")
      end

      NOT_VALID_SERVERS_MESSAGE = N_("Not valid location for the NTP servers:\n%{servers}" \
        "\n\nPlease, enter a valid IP or Hostname").freeze
      # Validate input
      #
      # * All specified IPs or hostnames should be valid
      # * If no server is specified, ask the user whether proceed with installation or not
      #
      # @return [Boolean] true if value is valid; false otherwise.
      def validate
        return skip_ntp_server? if servers.empty?
        invalid_servers = servers.reject { |v| Yast::IP.Check(v) || Yast::Hostname.CheckFQ(v) }
        return true if invalid_servers.empty?
        Yast::Popup.Error(
          format(_(NOT_VALID_SERVERS_MESSAGE), servers: invalid_servers.join(", "))
        )

        false
      end

      def help
        # TRANSLATORS: a help text for the NTP server input field
        _("<h3>NTP Servers</h3>") +
          # TRANSLATORS: a help text for the NTP server input field
          _("<p>Enter the host name or the IP address of the NTP server which will be used for " \
            "synchronizing the time on this machine</p>") +
          # TRANSLATORS: a help text for the NTP server input field
          _("<p>Use comma (,) or space to separate multiple values.</p>")
      end

    private

      # Parse the widget's value an return the potential list of hostnames/addresses
      #
      # @return [Array<String>] List of hostnames/addresses
      def servers
        value.to_s.tr(",", " ").split(" ")
      end

      # Check if the user wants to intentionally skip the NTP server configuration
      #
      # @return [Boolean] true if user wants to skip it; false otherwise.
      def skip_ntp_server?
        Yast::Popup.AnyQuestion(
          _("NTP Servers"),
          # TRANSLATORS: error message for invalid ntp server name/address
          _("You have not configured an NTP server. This may lead to\n" \
          "your cluster not functioning properly or at all.\n" \
          "Proceed with caution and at your own risk.\n\n" \
          "Would you like to continue with the installation?"),
          Yast::Label.YesButton,
          Yast::Label.NoButton,
          :yes
        )
      end

      # Return the current role
      def role
        ::Installation::SystemRole.current_role
      end
    end
  end
end