# Fedora Developer Shell
#
# 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; version 2 of the License.
#
# 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 Library 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.
#
# Authors: Yaakov M. Nemoy <ynemoy@redhat.com>
#

from base.module import Module

class Fetcher(Module):
    def latest_version(self, pkg):
        '''download information from hackage to find out the latest version of a package
        '''
        raise NotImplementedError

    def url(self, pkg, ver):
        '''returns the url for tarball for a hackage package'''
        raise NotImplementedError

    def latest_url(self, pkg):
        ver = self.latest_version(pkg)
        return self.url(pkg, ver)