File size: 2,306 Bytes
8d55ddb | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 | """Module for session manipulation."""
from contextlib import contextmanager
from dynamicdecorators import config
CACHE = {'request': None,
'dynamic_decorators': {},
'is_changed': False}
# {DYNAMIC_DECORATOR: [SOURCE_DECORATORS]}
SESSION_KEY = 'DYNAMIC_DECORATORS'
def set_request(request):
"""Set current request."""
CACHE.update({'request': request,
'dynamic_decorators': request.session.get(SESSION_KEY, {}),
'is_changed': False})
def clear_request(request):
"""Remove current request."""
if CACHE['is_changed']:
request.session[SESSION_KEY] = CACHE['dynamic_decorators']
CACHE.update({'request': None,
'dynamic_decorators': {},
'is_changed': False})
def enable_decorator(dynamic_decorator, source_decorator):
"""Add given pipe to given pipeline."""
dynamic_decorators = CACHE['dynamic_decorators']
sources = dynamic_decorators.setdefault(dynamic_decorator, [])
if source_decorator not in sources:
sources.append(source_decorator)
CACHE['is_changed'] = True
def disable_decorator(dynamic_decorator, source_decorator):
"""Remove given pipe from given pipeline."""
dynamic_decorators = CACHE['dynamic_decorators']
sources = dynamic_decorators.setdefault(dynamic_decorator, [])
if source_decorator in sources:
sources.remove(source_decorator)
CACHE['is_changed'] = True
@contextmanager
def request_store_manager(request):
"""Context manager that holds a request during execution.
That request will be used in all the decorators. That way we will be
able to use decorators in every function.
"""
try:
set_request(request)
yield request
finally:
clear_request(request)
def request_store(f):
"""Decorator that stores request during execution."""
def __wrapper__(request, *args, **kwargs):
with request_store_manager(request):
return f(request, *args, **kwargs)
return __wrapper__
def get_enabled_decorators(slug):
"""Get list of enabled decorators from session."""
decorators = config.get_pipes()
enabled_slugs = CACHE['dynamic_decorators'].get(slug, [])
return [d for d in decorators if d.slug in enabled_slugs]
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