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# Copyright (C) 2011-2012 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/>.
from sugar_network import toolkit
from sugar_network.db.metadata import indexed_property
from sugar_network.db.metadata import StoredProperty, BlobProperty
from sugar_network.toolkit.router import Blob, ACL
class Resource(object):
"""Base class for all data classes."""
#: `Metadata` object that describes the document
metadata = None
def __init__(self, guid, record, cached_props=None, request=None):
self.props = cached_props or {}
self.guid = guid
self.is_new = not bool(guid)
self._record = record
self.request = request
self._modifies = set()
@property
def volume(self):
return self.request.routes.volume
@property
def directory(self):
return self.volume[self.metadata.name]
@indexed_property(slot=1000, prefix='RC', typecast=int, default=0,
acl=ACL.READ)
def ctime(self, value):
return value
@indexed_property(slot=1001, prefix='RM', typecast=int, default=0,
acl=ACL.READ)
def mtime(self, value):
return value
@indexed_property(slot=1002, prefix='RS', typecast=int, default=0, acl=0)
def seqno(self, value):
return value
@indexed_property(prefix='RA', typecast=dict, full_text=True, default={},
fmt=lambda x: _fmt_authors(x), acl=ACL.READ)
def author(self, value):
result = []
for guid, props in sorted(value.items(),
cmp=lambda x, y: cmp(x[1]['order'], y[1]['order'])):
if 'name' in props:
result.append({
'guid': guid,
'name': props['name'],
'role': props['role'],
})
else:
result.append({
'name': guid,
'role': props['role'],
})
return result
@author.setter
def author(self, value):
if type(value) not in (list, tuple):
return value
result = {}
for order, author in enumerate(value):
user = author.pop('guid')
author['order'] = order
result[user] = author
return result
@indexed_property(prefix='RL', typecast=[], default=[])
def layer(self, value):
return value
@indexed_property(prefix='RT', full_text=True, default=[], typecast=[])
def tags(self, value):
return value
def path(self, *args):
if not args:
return self._record.path()
prop = args[0]
if prop in self.metadata and \
isinstance(self.metadata[prop], BlobProperty):
return self._record.blob_path(*args)
else:
return self._record.path(*args)
def get(self, prop, accept_language=None):
"""Get document's property value.
:param prop:
property name to get value
:returns:
`prop` value
"""
prop = self.metadata[prop]
value = self.props.get(prop.name)
if value is None and self._record is not None:
meta = self._record.get(prop.name)
if isinstance(prop, StoredProperty):
if meta is not None:
value = meta.get('value')
else:
value = prop.default
else:
value = meta or Blob()
self.props[prop.name] = value
if value is not None and accept_language:
if isinstance(prop, StoredProperty) and prop.localized:
value = toolkit.gettext(value, accept_language)
return value
def properties(self, props, accept_language=None):
result = {}
for i in props:
result[i] = self.get(i, accept_language)
return result
def meta(self, prop):
return self._record.get(prop)
def modified(self, prop):
return prop in self._modifies
def __contains__(self, prop):
return self.get(prop)
def __getitem__(self, prop):
return self.get(prop)
def __setitem__(self, prop, value):
self.props[prop] = value
self._modifies.add(prop)
def _fmt_authors(value):
if isinstance(value, dict):
for guid, props in value.items():
if not isinstance(props, dict):
yield guid
else:
if 'name' in props:
yield props['name']
if not (props['role'] & ACL.INSYSTEM):
yield guid
else:
yield value
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