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######################################################################
# Copyright 2009, 2010 ryuslash
#
# This file is part of 4grab.
#
# 4grab 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.
#
# 4grab 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 4grab.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

import os
import ConfigParser
import sys

homedir = os.getenv("HOME")
if homedir is None:
    homedir = os.path.dirname(sys.argv[0])
    
class _Configuration(object):
    def __init__(self):
        self.filename = os.path.join(os.path.join(homedir, ".4grab"), "config.cfg")
        self.configparser = ConfigParser.RawConfigParser()
        
        self.check()
        
        self.configparser.read(self.filename)

    def set_optioncreator(self, optioncreator):
        self.optioncreator = optioncreator

    def check(self):
        changed = False
        # read if it exists
        if os.path.exists(self.filename):
                self.configparser.read(self.filename)
        # locations
        if not self.configparser.has_section("locations"):
            self.configparser.add_section("locations")
        # locations/download_base
        if not self.configparser.has_option("locations", "download_base"):
            self.create_option("locations",
                               "download_base",
                               os.path.join(homedir,
                                            "Pictures"),
                               "Please enter where "
                               "you would like the "
                               "downloads to go: ")
            changed = True
        # settings
        if not self.configparser.has_section("settings"):
            self.configparser.add_section("settings")
        # settings/categories
        if not self.configparser.has_option("settings", "categories"):
            self.create_option("settings",
                               "categories",
                               "w",
                               "Please enter which "
                               "category you would like "
                               "to download from: ")
            changed = True

        if changed:
            self.save()

    def create_option(self, section, name, default, message):
        self.configparser.set(section,
                              name,
                              self.optioncreator(default,
                                                 message))

    def get_download_location(self):
        return self.configparser.get("locations", "download_base")

    def get_category(self):
        return self.configparser.get("settings", "categories")

    def set_category(self, value):
        self.configparser.set("settings", "category", value)

    def option_exists(self, option):
        sections = self.configparser.sections()
        for section in sections:
            if self.configparser.has_option(section, option):
                return True
        return False

    def set_option(self, option, value):
        sec = None
        sections = self.configparser.sections()
        for section in sections:
            if self.configparser.has_option(section, option):
                sec = section
        
        if not sec is None:
            self.configparser.set(sec, option, value)
            return True
        else:
            return False

    def save(self):
        dirname = os.path.dirname(self.filename)
        if not os.path.exists(dirname):
            os.makedirs(dirname)
        configfile = open(self.filename, "w")
        self.configparser.write(configfile)

_configuration = _Configuration()
def Configuration(): return _configuration