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#!/usr/bin/ruby
require 'kconv'
require 'gtk'
require 'thread'

## constants.
Logdir = "/home/tshm/.madoka/log/" # dir path of the log needs "/" ending
CheckString = /> /     # regex to look for in the last line of the log
Timer = 30             # sleep time until the next check
Hybernate = 60*60      # sleep time after the user has dismissed the window
Notify_command = 'system("wavp /usr/X11R6/lib/X11/qvwm/sounds/chimes.wav >/dev/null 2>&1")'

# font setting
Gtk::RC::parse_string <<EOS
style "default"
{
  fontset = "-adobe-helvetica-medium-r-normal--14-*-*-*-*-*-*-*,-*-fixed-medium-r-normal--14-*"
}
widget_class "*" style "default"
EOS

class Notifier
  def initialize
    recently_checked = false
    m = Mutex::new()
    date = Time.now.strftime("%Y%m%d")

    # interface creation
    window = Gtk::Window.new(Gtk::WINDOW_TOPLEVEL)
    window.set_title('Message!!')
    window.signal_connect('destroy') {Gtk.main_quit}
    window.border_width = 5
    label = Gtk::Label.new('test')
    button = Gtk::Button.new('Dismiss')
    button.signal_connect('clicked') {
      window.hide_all()
      m.synchronize{recently_checked=true}
    }
    vbox = Gtk::VBox.new(false,5)
    vbox.pack_start(label, true, true)
    vbox.pack_start(button)
    window.add(vbox)
    button.grab_focus()

    # main loop ("check and sleep" infinite cycle)
    Thread.start do
      while (true)
        lastline = IO::readlines(Logdir+"log"+Time.now.strftime("%Y%m%d"))[-1]
        if (lastline =~ CheckString)
          label.set_text(Kconv::toeuc(lastline))
          window.show_all()
          window.queue_draw()
          eval(Notify_command)
        end
        sleep(Timer)
        if recently_checked
          sleep(Hybernate)
          m.synchronize{recently_checked=false}
        end
      end
    end
  end
end

Notifier.new
Gtk.main