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# Copyright 2013 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
from itertools import ifilter
from operator import itemgetter
from data_source import DataSource
from extensions_paths import PRIVATE_TEMPLATES
from features_utility import Filtered
from future import Future
def _ListifyPermissions(permissions):
'''Filter out any permissions that do not have a description or with a name
that ends with Private then sort permissions features by name into a list.
'''
def filter_permissions(perm):
return 'description' in perm and not perm['name'].endswith('Private')
return sorted(
ifilter(filter_permissions, permissions.itervalues()),
key=itemgetter('name'))
def _AddDependencyDescriptions(permissions, api_features):
'''Use |api_features| to determine the dependencies APIs have on permissions.
Add descriptions to |permissions| based on those dependencies.
'''
for name, permission in permissions.iteritems():
# Don't overwrite the description created by expanding a partial template.
if 'partial' in permission or not permission['platforms']:
continue
has_deps = False
if name in api_features:
for dependency in api_features[name].get('dependencies', ()):
if dependency.startswith('permission:'):
has_deps = True
if has_deps:
permission['partial'] = 'permissions/generic_description.html'
class PermissionsDataSource(DataSource):
'''Load and format permissions features to be used by templates.
'''
def __init__(self, server_instance, request):
self._features_bundle = server_instance.features_bundle
self._object_store = server_instance.object_store_creator.Create(
PermissionsDataSource)
self._template_cache = server_instance.compiled_fs_factory.ForTemplates(
server_instance.host_file_system_provider.GetTrunk())
def _CreatePermissionsData(self):
api_features_future = self._features_bundle.GetAPIFeatures()
permission_features_future = self._features_bundle.GetPermissionFeatures()
def resolve():
permission_features = permission_features_future.Get()
_AddDependencyDescriptions(permission_features, api_features_future.Get())
# Turn partial templates into descriptions, ensure anchors are set.
for permission in permission_features.values():
if not 'anchor' in permission:
permission['anchor'] = permission['name']
if 'partial' in permission:
permission['description'] = self._template_cache.GetFromFile(
PRIVATE_TEMPLATES + permission['partial']).Get()
del permission['partial']
def filter_for_platform(permissions, platform):
return _ListifyPermissions(Filtered(permissions, platform))
return {
'declare_apps': filter_for_platform(permission_features, 'apps'),
'declare_extensions': filter_for_platform(
permission_features, 'extensions')
}
return Future(callback=resolve)
def _GetCachedPermissionsData(self):
data = self._object_store.Get('permissions_data').Get()
if data is None:
data = self._CreatePermissionsData().Get()
self._object_store.Set('permissions_data', data)
return data
def Cron(self):
return self._CreatePermissionsData()
def get(self, key):
return self._GetCachedPermissionsData().get(key)
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