#
# Copyright 2006 sense.lab e.V.
# 
# This file is part of the CryptoBox.
#
# The CryptoBox 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 2 of the License, or
# (at your option) any later version.
# 
# The CryptoBox 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 the CryptoBox; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

"""Change date and time.

requires:
 - date
 - ntpdate (planned)
"""

__revision__ = "$Id$"

import cryptobox.plugins.base


class date(cryptobox.plugins.base.CryptoBoxPlugin):
    """The date feature of the CryptoBox.
    """

    plugin_capabilities = [ "system" ]
    plugin_visibility = [ "preferences" ]
    request_auth = False
    rank = 10

    def do_action(self, store=None, year=0, month=0, day=0, hour=0, minute=0):
        """The action handler.
        """
        import datetime
        if store:
            try:
                year, month, day = int(year), int(month), int(day)
                hour, minute = int(hour), int(minute)
                ## check if the values are valid
                datetime.datetime(year, month, day, hour, minute)
            except ValueError:
                self.hdf["Data.Warning"] = "Plugins.date.InvalidDate"
            else:
                new_date = "%02d%02d%02d%02d%d" % (month, day, hour, minute, year)
                if self.__set_date(new_date):
                    self.cbox.log.info("changed date to: %s" % new_date)
                    self.hdf["Data.Success"] = "Plugins.date.DateChanged"
                else:
                    ## a failure should usually be an invalid date (we do not check it really)
                    self.cbox.log.info("failed to set date: %s" % new_date)
                    self.hdf["Data.Warning"] = "Plugins.date.InvalidDate"
        self.__prepare_form_data()
        return "form_date"


    def get_status(self):
        """Retrieve the status of the feature.
        """
        now = self.__get_current_date()
        return "%d/%d/%d/%d/%d/%d" % \
                (now.year, now.month, now.day, now.hour, now.minute, now.second)


    def get_warnings(self):
        import os
        warnings = []
        if not os.path.isfile(self.root_action.DATE_BIN):
            warnings.append((48, "Plugins.%s.MissingProgramDate" % self.get_name()))
        return warnings


    def __prepare_form_data(self):
        """Set some hdf values.
        """
        cur_date = self.__get_current_date()
        self.hdf[self.hdf_prefix + "year"]	= cur_date.year
        self.hdf[self.hdf_prefix + "month"]	= cur_date.month
        self.hdf[self.hdf_prefix + "day"]	= cur_date.day
        self.hdf[self.hdf_prefix + "hour"]	= cur_date.hour
        self.hdf[self.hdf_prefix + "minute"]	= cur_date.minute


    def __get_current_date(self):
        """Retrieve the current date and time.
        """
        import datetime
        return datetime.datetime(2000, 1, 1).now()
    

    def __set_date(self, new_date):
        """Set a new date and time.
        """
        import subprocess
        import os
        proc = subprocess.Popen(
            shell = False,
            args = [
                self.cbox.prefs["Programs"]["super"],
                self.cbox.prefs["Programs"]["CryptoBoxRootActions"],
                "plugin",
                os.path.join(self.plugin_dir, "root_action.py"),
                new_date])
        proc.wait()
        return proc.returncode == 0