import ConfigParser

class ConfError(Exception):
    pass

class ConfNotAvailable(ConfError):
    pass

class Conf:
    def __init__(self):
        self.conf = ConfigParser.ConfigParser()
        for section in ("db", "cache"):
            self.conf.add_section(section)
    
    def load(self, file):
        self.conf.readfp(file)

    def save(self, file):
        self.conf.write(file)

    def __get(self, section, key):
        try:
            return self.conf.get(section, key)
        except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
            raise ConfNotAvailable

    def __get_int(self, section, key):
        try:
            return self.conf.getint(section, key)
        except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
            raise ConfNotAvailable
        except ValueError:
            raise ConfError

    def __get_bool(self, section, key):
        try:
            return self.conf.getboolean(section, key)
        except (ConfigParser.NoSectionError, ConfigParser.NoOptionError):
            raise ConfNotAvailable
        except ValueError:
            raise ConfError

    def __set(self, section, key, value):
        self.conf.set(section, key, value)

    def setDBtype(self, value):
        return self.__set("db", "type", value)

    def setDBformat(self, value):
        return self.__set("db", "format", value)

    def setDBhost(self, value):
        return self.__set("db", "host", value)

    def setDBport(self, value):
        return self.__set("db", "port", value)

    def setDBname(self, value):
        return self.__set("db", "name", value)

    def setDBuser(self, value):
        return self.__set("db", "user", value)

    def setDBpassword(self, value):
        return self.__set("db", "password", value)

    def enableCacheOnDisk(self):
        return self.__set("cache", "disk", "true")

    def setCacheMemory(self, value):
        return self.__set("cache", "memory", value)

    def getDBtype(self):
        return self.__get("db", "type")

    def getDBformat(self):
        return self.__get("db", "format")

    def getDBhost(self):
        return self.__get("db", "host")

    def getDBport(self):
        return self.__get_int("db", "port")

    def getDBname(self):
        return self.__get("db", "name")

    def getDBuser(self):
        return self.__get("db", "user")

    def getDBpassword(self):
        return self.__get("db", "password")

    def isCacheOnDiskEnabled(self):
        return self.__get_bool("cache", "disk")

    def getCacheMemory(self):
        return self.__get_int("cache", "memory")