SafeEyes/safeeyes/safeeyes/safeeyes

#!/usr/bin/env python2

# Safe Eyes is a utility to remind you to take break frequently
# to protect your eyes from eye strain.

# Copyright (C) 2016  Gobinath

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# 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, see <http://www.gnu.org/licenses/>.

import os
import gi
import json
import shutil
import errno
import dbus
import logging
from dbus.mainloop.glib import DBusGMainLoop

from BreakScreen import BreakScreen
from TrayIcon import TrayIcon
from SettingsDialog import SettingsDialog
from SafeEyesCore import SafeEyesCore
from Notification import Notification

gi.require_version('Gtk', '3.0')
from gi.repository import Gtk

# Define necessary paths
bin_directory = os.path.dirname(os.path.realpath(__file__))
config_file_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/safeeyes.json')
style_sheet_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/style/safeeyes_style.css')
log_file_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/safeeyes.log')
break_screen_glade = os.path.join(bin_directory, "glade/break_screen.glade")
settings_dialog_glade = os.path.join(bin_directory, "glade/settings_dialog.glade")
system_config_file_path = os.path.join(bin_directory, "config/safeeyes.json")
system_style_sheet_path = os.path.join(bin_directory, "config/style/safeeyes_style.css")
system_language_directory = os.path.join(bin_directory, "config/lang")

is_active = True

def show_settings():
	logging.info("Show Settings dialog")
	settings_dialog = SettingsDialog(config, language, save_settings, settings_dialog_glade)
	settings_dialog.show()

def show_notification():
	notification.show(config['pre_break_warning_time'])

def show_alert(message):
	logging.info("Show the break screen")
	notification.close()
	break_screen.show_message(message)

def close_alert():
	logging.info("Close the break screen")
	break_screen.close()

def on_countdown(count):
	break_screen.show_count_down(count)

def on_quit():
	logging.info("Quit Safe Eyes")
	core.stop()
	notification.quite();
	Gtk.main_quit()

def handle_suspend_callback(sleeping):
	if sleeping:
		# Sleeping / suspending
		if is_active:
			core.stop()
			logging.info("Stopped Safe Eyes due to system suspend")
	else:
		# Resume from sleep
		if is_active:
			core.start()
			logging.info("Resumed Safe Eyes after system wakeup")

def handle_system_suspend():
	DBusGMainLoop(set_as_default=True)
	bus = dbus.SystemBus()
	bus.add_signal_receiver(handle_suspend_callback, 'PrepareForSleep', 'org.freedesktop.login1.Manager', 'org.freedesktop.login1')

def on_skipped():
	logging.info("User skipped the break")
	core.skip_break()

def save_settings(config):
	logging.info("Saving settings to safeeyes.json")
	# Write the configuration to file
	with open(config_file_path, 'w') as config_file:
		json.dump(config, config_file, indent=4, sort_keys=True)
	
	# Restart the core and intialize the components
	logging.info("Initialize SafeEyesCore with modified settings. This will take affect from next break")
	core.initialize(config, language)
	break_screen.initialize(config, language)

def enable_safeeyes():
	is_active = True
	core.toggle_active_state()

def disable_safeeyes():
	is_active = False
	core.toggle_active_state()

def prepare_local_config_dir():
	config_dir_path = os.path.join(os.path.expanduser('~'), '.config/safeeyes/style')
	startup_dir_path = os.path.join(os.path.expanduser('~'), '.config/autostart')
	try:
		os.makedirs(config_dir_path)
	except OSError as exc:
		if exc.errno == errno.EEXIST and os.path.isdir(config_dir_path):
			pass
		else:
			raise

	if not os.path.isfile(config_file_path):
		shutil.copy2(system_config_file_path, config_file_path)

		try:
			os.makedirs(startup_dir_path)
		except OSError as exc:
			if exc.errno == errno.EEXIST and os.path.isdir(startup_dir_path):
				pass
			else:
				raise

		# Add to startup for the first time only
		try:
			os.symlink("/usr/share/applications/safeeyes.desktop", os.path.join(startup_dir_path, "safeeyes.desktop"))
		except OSError as exc:
			pass

	if not os.path.isfile(style_sheet_path):
		shutil.copy2(system_style_sheet_path, style_sheet_path)

def main():
	prepare_local_config_dir()

	# Configure logging. Reset with every restart
	logging.basicConfig(format='%(asctime)s [%(levelname)s] %(message)s', filename=log_file_path, filemode='w', level=logging.INFO)
	logging.info("Starting Safe Eyes")

	global break_screen
	global core
	global notification
	global config
	global tray_icon
	global language

	# Read the configuration
	with open(config_file_path) as config_file:    
		config = json.load(config_file)
	
	language_file_path = os.path.join(system_language_directory, str(config['language']) + '.json')
	with open(language_file_path) as language_file:
		language = json.load(language_file)
	
	tray_icon = TrayIcon(language, show_settings, enable_safeeyes, disable_safeeyes, on_quit)
	break_screen = BreakScreen(on_skipped, break_screen_glade, style_sheet_path)
	break_screen.initialize(config, language)
	core = SafeEyesCore(show_notification, show_alert, close_alert, on_countdown, tray_icon.next_break_time)
	core.initialize(config, language)
	core.start()
	notification = Notification(language)
	
	handle_system_suspend()

	Gtk.main()

main()