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# Copyright (C) 2012 Aleksey Lim
#
# 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/>.
import logging
from cStringIO import StringIO
from os.path import isdir, abspath
from sugar_network import client
from sugar_network.toolkit import enforce
from client import Client
_logger = logging.getLogger('sugar_network.objects')
_uid = client.sugar_uid()
class Object(object):
def __init__(self, document, reply, guid=None, props=None,
offset=None, **kwargs):
self.document = document
self._reply = reply or []
self._guid = guid
self._props = props or {}
self._dirty = set()
self.offset = offset
for prop, value in kwargs.items():
self[prop] = value
@property
def guid(self):
return self._guid
@property
def is_author(self):
return _uid in [(i.get('guid') or i.get('name')) for i in self['author']]
def get(self, prop):
if prop == 'guid':
return self._guid
result = self._props.get(prop)
if result is None:
enforce(prop in self._reply,
'Access to not requested %r property in %r',
prop, self.document)
self.fetch()
result = self._props.get(prop)
return result
def fetch(self, props=None):
enforce(self._guid, 'Object needs to be posted first')
to_fetch = []
for prop in (props or self._reply):
if prop not in self._props:
to_fetch.append(prop)
if not to_fetch:
return
response = Client.call('GET',
document=self.document, guid=self._guid, reply=to_fetch)
response.update(self._props)
self._props = response
def post(self):
if not self._dirty:
return
props = {}
for i in self._dirty:
props[i] = self._props.get(i)
if self._guid:
Client.call('PUT',
document=self.document, guid=self._guid, content=props,
content_type='application/json')
else:
self._guid = Client.call('POST',
document=self.document, content=props,
content_type='application/json')
self._dirty.clear()
return self._guid
def get_blob(self, prop):
return Client.call('GET',
document=self.document, guid=self._guid, prop=prop)
def upload_blob(self, prop, content, content_type):
enforce(self._guid, 'Object needs to be posted first')
Client.call('PUT',
document=self.document, guid=self._guid, prop=prop,
content=content, content_type=content_type)
def __getitem__(self, prop):
result = self.get(prop)
enforce(result is not None, KeyError,
'Property %r is absent in %r', prop, self.document)
return result
def __setitem__(self, prop, value):
enforce(prop != 'guid', 'Property "guid" is read-only')
if self._props.get(prop) == value:
return
self._props[prop] = value
self._dirty.add(prop)
def __enter__(self):
return self
def __exit__(self, exc_type, exc_value, traceback):
self.post()
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