# encoding: UTF-8
#
# PhotoFilmStrip - Creates movies out of your pictures.
#
# Copyright (C) 2008 Jens Goepfert
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#

import logging
import os
import sys


def Encode(value, coding="utf-8"):
    if isinstance(value, unicode):
        return value.encode(coding)
    elif isinstance(value, str):
        return value
    else:
        return str(value)


def Decode(value, coding="utf-8"):
    if isinstance(value, unicode):
        return value
    elif isinstance(value, str):
        return value.decode(coding)
    else:
        return unicode(value)


def IsPathWritable(path):
    _path = Encode(path, sys.getfilesystemencoding())
    try:
        fd = open(os.path.join(_path, 'test'), 'w')
        fd.write(" ")
        fd.close()
        os.remove(os.path.join(_path, 'test'))
        return True
    except StandardError, err:
        logging.debug("IsPathWritable(%s): %s", path, err)
        return False


def CheckFile(filename):
    if filename and not os.path.exists(filename):
        return False
    else:
        return True
