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Un seul décorateur pour les gouverner (presque) tous.
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Hugo LEVY-FALK
parent
1955229842
commit
586321fd8a
1 changed files with 74 additions and 141 deletions
215
re2o/acl.py
215
re2o/acl.py
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@ -28,135 +28,108 @@ Here are defined some decorators that can be used in views to handle ACL.
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from __future__ import unicode_literals
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import sys
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from itertools import chain
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from django.db.models import Model
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from django.contrib import messages
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from django.shortcuts import redirect
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from django.urls import reverse
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def can_create(model):
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def acl_base_decorator(method_name, *targets, **kwargs):
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"""Base decorator for acl. It checks if the user has the permission by
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calling model.method_name. If the flag on_instance is True, tries to get an
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instance of the model by calling model.get_instance(*args, **kwargs) and
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runs instance.mehod_name rather than model.method_name.
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"""
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on_instance = kwargs.get('on_instance', True)
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def group_targets():
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current_target = None
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current_fields = []
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for t in targets:
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if isinstance(t, type) and issubclass(t, Model):
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if current_target:
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yield (current_target, current_fields)
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current_target = t
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current_fields = []
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else:
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current_fields.append(t)
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yield (current_target, current_fields)
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request"""
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instances = []
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def process_target(target, fields):
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if on_instance:
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try:
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target = target.get_instance(*args, **kwargs)
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instances.append(target)
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except target.DoesNotExist:
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yield False, u"Entrée inexistante"
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return
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if hasattr(target, method_name):
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can_fct = getattr(target, method_name)
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yield can_fct(request.user, *args, **kwargs)
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for field in fields:
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can_change_fct = getattr(target, 'can_change_' + field)
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yield can_change_fct(request.user, *args, **kwargs)
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error_messages = [
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x[1] for x in chain.from_iterable(
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process_target(x[0], x[1]) for x in group_targets()
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) if not x[0]
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]
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if error_messages:
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for msg in error_messages:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, *chain(instances, args), **kwargs)
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return wrapper
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return decorator
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def can_create(*models):
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"""Decorator to check if an user can create a model.
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It assumes that a valid user exists in the request and that the model has a
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method can_create(user) which returns true if the user can create this kind
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of models.
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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can, msg = model.can_create(request.user, *args, **kwargs)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse('index'))
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return view(request, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_create', *models, on_instance=False)
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def can_edit(model, *field_list):
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def can_edit(*targets):
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"""Decorator to check if an user can edit a model.
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It tries to get an instance of the model, using
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`model.get_instance(*args, **kwargs)` and assumes that the model has a
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method `can_edit(user)` which returns `true` if the user can edit this
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kind of models.
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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try:
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instance = model.get_instance(*args, **kwargs)
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except model.DoesNotExist:
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messages.error(request, u"Entrée inexistante")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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can, msg = instance.can_edit(request.user)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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for field in field_list:
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can_change_fct = getattr(instance, 'can_change_' + field)
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can, msg = can_change_fct(request.user, *args, **kwargs)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, instance, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_edit', *targets)
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def can_change(model, *field_list):
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def can_change(*targets):
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"""Decorator to check if an user can edit a field of a model class.
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Difference with can_edit : take a class and not an instance
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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for field in field_list:
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can_change_fct = getattr(model, 'can_change_' + field)
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can, msg = can_change_fct(request.user, *args, **kwargs)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_change', *targets)
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def can_delete(model):
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def can_delete(*targets):
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"""Decorator to check if an user can delete a model.
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It tries to get an instance of the model, using
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`model.get_instance(*args, **kwargs)` and assumes that the model has a
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method `can_delete(user)` which returns `true` if the user can delete this
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kind of models.
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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try:
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instance = model.get_instance(*args, **kwargs)
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except model.DoesNotExist:
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messages.error(request, u"Entrée inexistante")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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can, msg = instance.can_delete(request.user)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, instance, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_delete', *targets)
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def can_delete_set(model):
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@ -187,60 +160,20 @@ def can_delete_set(model):
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return decorator
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def can_view(model):
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def can_view(*targets):
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"""Decorator to check if an user can view a model.
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It tries to get an instance of the model, using
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`model.get_instance(*args, **kwargs)` and assumes that the model has a
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method `can_view(user)` which returns `true` if the user can view this
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kind of models.
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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try:
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instance = model.get_instance(*args, **kwargs)
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except model.DoesNotExist:
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messages.error(request, u"Entrée inexistante")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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can, msg = instance.can_view(request.user)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, instance, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_view', *targets)
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def can_view_all(model):
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def can_view_all(*targets):
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"""Decorator to check if an user can view a class of model.
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"""
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def decorator(view):
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"""The decorator to use on a specific view
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"""
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def wrapper(request, *args, **kwargs):
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"""The wrapper used for a specific request
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"""
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can, msg = model.can_view_all(request.user)
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if not can:
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messages.error(
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request, msg or "Vous ne pouvez pas accéder à ce menu")
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return redirect(reverse(
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'users:profil',
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kwargs={'userid': str(request.user.id)}
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))
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return view(request, *args, **kwargs)
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return wrapper
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return decorator
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return acl_base_decorator('can_view_all', *targets, on_instance=False)
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def can_view_app(app_name):
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