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# Copyright (C) 2018 Lars Wirzenius
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import muck
class MemoryStore:
def __init__(self):
self._dict = {}
def __len__(self):
return len(self._dict)
def as_dict(self):
return self._dict
def change(self, chg):
funcs = {
'create': self._create,
'update': self._update,
'delete': self._delete,
}
op = chg.get_op()
func = funcs[op]
func(chg)
def _create(self, chg):
rid = chg.get_id()
if rid in self._dict:
raise muck.Error('Resource {} already exists'.format(rid))
self._dict[rid] = (chg.get_meta(), chg.get_res())
def _update(self, chg):
rid = chg.get_id()
if rid not in self._dict:
raise muck.Error('Resource {} does not exist'.format(rid))
self._dict[rid] = (chg.get_meta(), chg.get_res())
def _delete(self, chg):
rid = chg.get_id()
if rid not in self._dict:
raise muck.Error('Resource {} does not exist'.format(rid))
del self._dict[rid]
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