| """Module for session manipulation.""" |
| from contextlib import contextmanager |
| from dynamicdecorators import config |
|
|
|
|
| CACHE = {'request': None, |
| 'dynamic_decorators': {}, |
| 'is_changed': False} |
|
|
| |
| 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] |
|
|
