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#!/usr/bin/python
#
# Copyright (C) 2014  Simo Sorce <simo@redhat.com>
#
# see file 'COPYING' for use and warranty information
#
# 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 3 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, see <http://www.gnu.org/licenses/>.

from ipsilon.util.data import Store
from ipsilon.util.page import Page
from ipsilon.util.user import UserSession
import cherrypy
from ipsilon.login.common import FACILITY as LOGIN_FACILITY


def admin_protect(fn):

    def check(*args, **kwargs):
        if UserSession().get_user().is_admin:
            return fn(*args, **kwargs)

        raise cherrypy.HTTPError(403)

    return check


class LoginPluginPage(Page):

    def __init__(self, obj, site, baseurl):
        super(LoginPluginPage, self).__init__(site)
        self._obj = obj
        self.url = '%s/%s' % (baseurl, obj.name)

        # Get the defaults
        self.plugin_config = obj.get_config_desc()
        if not self.plugin_config:
            self.plugin_config = []

        # Now overlay the actual config
        for option in self.plugin_config:
            self.plugin_config[option][2] = obj.get_config_value(option)

    @admin_protect
    def GET(self, *args, **kwargs):
        return self._template('admin/login_plugin.html',
                              title='%s plugin' % self._obj.name,
                              name='admin_login_%s_form' % self._obj.name,
                              action=self.url,
                              options=self.plugin_config)

    @admin_protect
    def POST(self, *args, **kwargs):

        message = "Nothing was modified."
        new_values = dict()

        for key, value in kwargs.iteritems():
            if key in self.plugin_config:
                if value != self.plugin_config[key][2]:
                    cherrypy.log.error("Storing [%s]: %s = %s" %
                                       (self._obj.name, key, value))
                    new_values[key] = value

        if len(new_values) != 0:
            # First we try to save in the database
            try:
                store = Store()
                store.save_plugin_config(LOGIN_FACILITY,
                                         self._obj.name, new_values)
                message = "New configuration saved."
            except Exception:  # pylint: disable=broad-except
                message = "Failed to save data!"

            # And only if it succeeds we change the live object
            for name, value in new_values.items():
                self._obj.set_config_value(name, value)
                self.plugin_config[name][2] = value

        return self._template('admin/login_plugin.html',
                              message=message,
                              title='%s plugin' % self._obj.name,
                              name='admin_login_%s_form' % self._obj.name,
                              action=self.url,
                              options=self.plugin_config)

    def root(self, *args, **kwargs):
        cherrypy.log.error("method: %s" % cherrypy.request.method)
        op = getattr(self, cherrypy.request.method, self.GET)
        if callable(op):
            return op(*args, **kwargs)


class LoginPlugins(Page):
    def __init__(self, site, baseurl):
        super(LoginPlugins, self).__init__(site)
        self.url = '%s/login' % baseurl

        for plugin in self._site[LOGIN_FACILITY]['available']:
            cherrypy.log.error('Admin login plugin: %s' % plugin)
            obj = self._site[LOGIN_FACILITY]['available'][plugin]
            self.__dict__[plugin] = LoginPluginPage(obj, self._site, self.url)


class Admin(Page):

    def __init__(self, *args, **kwargs):
        super(Admin, self).__init__(*args, **kwargs)
        self.url = '%s/admin' % self.basepath
        self.login = LoginPlugins(self._site, self.url)

    def root(self, *args, **kwargs):
        login_plugins = self._site[LOGIN_FACILITY]
        return self._template('admin/index.html', title='Administration',
                              available=login_plugins['available'],
                              enabled=login_plugins['enabled'])