# Nautilus Admin - Extension for Nautilus to do administrative operations
# Copyright (C) 2015-2017 Bruno Nova
#               2016 frmdstryr <frmdstryr@gmail.com>
#
# 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, subprocess

from gi import require_version

from gi.repository import Nautilus, GObject
from gettext import gettext, bindtextdomain, textdomain
import locale

ROOT_UID = 0
NAUTILUS_PATH="/usr/bin/nautilus"
GEDIT_PATH="/usr/bin/gnome-text-editor"

class NautilusAdmin(Nautilus.MenuProvider, GObject.GObject):
	"""Simple Nautilus extension that adds some administrative (root) actions to
	the right-click menu, using GNOME's new admin backend."""
	def __init__(self):
		pass

	def get_file_items(self, *args):
		files = args[-1]
		"""Returns the menu items to display when one or more files/folders are
		selected."""
		# Don't show when already running as root, or when more than 1 file is selected
		if os.geteuid() == ROOT_UID or len(files) != 1:
			return
		file = files[0]

		# Add the menu items
		items = []
		self._setup_gettext();
		if file.get_uri_scheme() == "file": # must be a local file/directory
			if file.is_directory():
				if os.path.exists(NAUTILUS_PATH):
					items += [self._create_nautilus_item(file)]
			else:
				if os.path.exists(GEDIT_PATH):
					items += [self._create_gedit_item(file)]

		return items

	def get_background_items(self, *args):
		files = args[-1]
		"""Returns the menu items to display when no file/folder is selected
		(i.e. when right-clicking the background)."""
		# Don't show when already running as root
		if os.geteuid() == ROOT_UID:
			return

		# Add the menu items
		items = []
		self._setup_gettext();
		if files.is_directory() and files.get_uri_scheme() == "file":
			if os.path.exists(NAUTILUS_PATH):
				items += [self._create_nautilus_item(files)]

		return items


	def _setup_gettext(self):
		"""Initializes gettext to localize strings."""
		try: # prevent a possible exception
			locale.setlocale(locale.LC_ALL, "")
		except:
			pass
		bindtextdomain("nautilus-admin", "/usr/share/locale")
		textdomain("nautilus-admin")

	def _create_nautilus_item(self, file):
		"""Creates the 'Open as Administrator' menu item."""
		item = Nautilus.MenuItem(name="NautilusAdmin::Nautilus",
		                         label=gettext("Open as A_dministrator"),
		                         tip=gettext("Open this folder with root privileges"))
		item.connect("activate", self._nautilus_run, file)
		return item

	def _create_gedit_item(self, file):
		"""Creates the 'Edit as Administrator' menu item."""
		item = Nautilus.MenuItem(name="NautilusAdmin::Gedit",
		                         label=gettext("Edit as A_dministrator"),
		                         tip=gettext("Open this file in the text editor with root privileges"))
		item.connect("activate", self._gedit_run, file)
		return item


	def _nautilus_run(self, menu, file):
		"""'Open as Administrator' menu item callback."""
		uri = file.get_uri()
		admin_uri = uri.replace("file://", "admin://")
		subprocess.Popen([NAUTILUS_PATH, admin_uri])

	def _gedit_run(self, menu, file):
		"""'Edit as Administrator' menu item callback."""
		uri = file.get_uri()
		admin_uri = uri.replace("file://", "admin://")
		subprocess.Popen([GEDIT_PATH, admin_uri])
