339 lines
10 KiB
Python
339 lines
10 KiB
Python
from __future__ import unicode_literals
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from django.conf import settings
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from django.contrib import messages
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from django.core.exceptions import PermissionDenied
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from django.db.models.query import QuerySet
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from django.http import HttpResponseRedirect
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from django.shortcuts import resolve_url
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from django.utils.translation import ungettext, ugettext_lazy as _
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from permissions import Permission
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from acls.models import AccessControlList
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from .forms import DynamicForm
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__all__ = (
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'DeleteExtraDataMixin', 'DynamicFormViewMixin', 'ExtraContextMixin',
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'FormExtraKwargsMixin', 'MultipleObjectMixin', 'ObjectActionMixin',
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'ObjectListPermissionFilterMixin', 'ObjectNameMixin',
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'ObjectPermissionCheckMixin', 'RedirectionMixin',
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'ViewPermissionCheckMixin'
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)
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class DeleteExtraDataMixin(object):
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def delete(self, request, *args, **kwargs):
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self.object = self.get_object()
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success_url = self.get_success_url()
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if hasattr(self, 'get_delete_extra_data'):
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self.object.delete(**self.get_delete_extra_data())
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else:
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self.object.delete()
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return HttpResponseRedirect(success_url)
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class DynamicFormViewMixin(object):
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form_class = DynamicForm
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def get_form_kwargs(self):
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data = super(DynamicFormViewMixin, self).get_form_kwargs()
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data.update({'schema': self.get_form_schema()})
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return data
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class ExtraContextMixin(object):
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"""
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Mixin that allows views to pass extra context to the template
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"""
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extra_context = {}
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def get_extra_context(self):
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return self.extra_context
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def get_context_data(self, **kwargs):
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context = super(ExtraContextMixin, self).get_context_data(**kwargs)
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context.update(self.get_extra_context())
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return context
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class FormExtraKwargsMixin(object):
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"""
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Mixin that allows a view to pass extra keyword arguments to forms
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"""
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form_extra_kwargs = {}
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def get_form_extra_kwargs(self):
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return self.form_extra_kwargs
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def get_form_kwargs(self):
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result = super(FormExtraKwargsMixin, self).get_form_kwargs()
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result.update(self.get_form_extra_kwargs())
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return result
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class MultipleInstanceActionMixin(object):
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# TODO: Deprecated, replace views using this with
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# MultipleObjectFormActionView or MultipleObjectConfirmActionView
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model = None
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success_message = _('Operation performed on %(count)d object')
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success_message_plural = _('Operation performed on %(count)d objects')
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def get_pk_list(self):
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return self.request.GET.get(
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'id_list', self.request.POST.get('id_list', '')
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).split(',')
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def get_queryset(self):
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return self.model.objects.filter(pk__in=self.get_pk_list())
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def get_success_message(self, count):
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return ungettext(
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self.success_message,
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self.success_message_plural,
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count
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) % {
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'count': count,
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}
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def post(self, request, *args, **kwargs):
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count = 0
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for instance in self.get_queryset():
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try:
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self.object_action(instance=instance)
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except PermissionDenied:
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pass
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else:
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count += 1
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messages.success(
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self.request,
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self.get_success_message(count=count)
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)
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return HttpResponseRedirect(self.get_success_url())
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class MultipleObjectMixin(object):
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"""
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Mixin that allows a view to work on a single or multiple objects
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"""
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model = None
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object_permission = None
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pk_list_key = 'id_list'
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pk_list_separator = ','
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pk_url_kwarg = 'pk'
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queryset = None
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slug_url_kwarg = 'slug'
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def get_pk_list(self):
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result = self.request.GET.get(
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self.pk_list_key, self.request.POST.get(self.pk_list_key)
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)
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if result:
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return result.split(self.pk_list_separator)
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else:
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return None
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def get_queryset(self):
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if self.queryset is not None:
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queryset = self.queryset
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if isinstance(queryset, QuerySet):
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queryset = queryset.all()
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elif self.model is not None:
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queryset = self.model._default_manager.all()
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pk = self.kwargs.get(self.pk_url_kwarg)
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slug = self.kwargs.get(self.slug_url_kwarg)
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pk_list = self.get_pk_list()
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if pk is not None:
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queryset = queryset.filter(pk=pk)
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# Next, try looking up by slug.
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if slug is not None and (pk is None or self.query_pk_and_slug):
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slug_field = self.get_slug_field()
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queryset = queryset.filter(**{slug_field: slug})
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if pk_list is not None:
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queryset = queryset.filter(pk__in=self.get_pk_list())
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if pk is None and slug is None and pk_list is None:
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raise AttributeError(
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'Generic detail view %s must be called with '
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'either an object pk, a slug or an id list.'
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% self.__class__.__name__
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)
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if self.object_permission:
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return AccessControlList.objects.filter_by_access(
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self.object_permission, self.request.user, queryset=queryset
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)
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else:
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return queryset
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class ObjectActionMixin(object):
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"""
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Mixin that performs an user action to a queryset
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"""
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success_message = 'Operation performed on %(count)d object'
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success_message_plural = 'Operation performed on %(count)d objects'
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def get_success_message(self, count):
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return ungettext(
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self.success_message,
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self.success_message_plural,
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count
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) % {
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'count': count,
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}
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def object_action(self, instance, form=None):
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pass
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def view_action(self, form=None):
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self.action_count = 0
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for instance in self.get_queryset():
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try:
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self.object_action(form=form, instance=instance)
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except PermissionDenied:
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pass
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else:
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self.action_count += 1
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messages.success(
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self.request,
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self.get_success_message(count=self.action_count)
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)
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class ObjectListPermissionFilterMixin(object):
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"""
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access_object_retrieve_method is have the entire view check against
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an object permission and not the individual secondary items.
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"""
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access_object_retrieve_method = None
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object_permission = None
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def dispatch(self, request, *args, **kwargs):
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if self.access_object_retrieve_method and self.object_permission:
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AccessControlList.objects.check_access(
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permissions=(self.object_permission,), user=request.user,
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obj=getattr(self, self.access_object_retrieve_method)()
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)
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return super(ObjectListPermissionFilterMixin, self).dispatch(request, *args, **kwargs)
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def get_queryset(self):
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queryset = super(ObjectListPermissionFilterMixin, self).get_queryset()
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if not self.access_object_retrieve_method and self.object_permission:
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return AccessControlList.objects.filter_by_access(
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self.object_permission, self.request.user, queryset=queryset
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)
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else:
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return queryset
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class ObjectNameMixin(object):
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def get_object_name(self, context=None):
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if not context:
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context = self.get_context_data()
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object_name = context.get('object_name')
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if not object_name:
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try:
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object_name = self.object._meta.verbose_name
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except AttributeError:
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object_name = _('Object')
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return object_name
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class ObjectPermissionCheckMixin(object):
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object_permission = None
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def get_permission_object(self):
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return self.get_object()
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def dispatch(self, request, *args, **kwargs):
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if self.object_permission:
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AccessControlList.objects.check_access(
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permissions=self.object_permission, user=request.user,
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obj=self.get_permission_object(),
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related=getattr(self, 'object_permission_related', None)
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)
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return super(
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ObjectPermissionCheckMixin, self
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).dispatch(request, *args, **kwargs)
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class RedirectionMixin(object):
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post_action_redirect = None
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action_cancel_redirect = None
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def dispatch(self, request, *args, **kwargs):
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post_action_redirect = self.get_post_action_redirect()
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action_cancel_redirect = self.get_action_cancel_redirect()
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self.next_url = self.request.POST.get(
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'next', self.request.GET.get(
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'next', post_action_redirect if post_action_redirect else self.request.META.get(
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'HTTP_REFERER', resolve_url(settings.LOGIN_REDIRECT_URL)
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)
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)
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)
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self.previous_url = self.request.POST.get(
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'previous', self.request.GET.get(
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'previous', action_cancel_redirect if action_cancel_redirect else self.request.META.get(
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'HTTP_REFERER', resolve_url(settings.LOGIN_REDIRECT_URL)
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)
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)
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)
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return super(
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RedirectionMixin, self
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).dispatch(request, *args, **kwargs)
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def get_action_cancel_redirect(self):
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return self.action_cancel_redirect
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def get_context_data(self, **kwargs):
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context = super(RedirectionMixin, self).get_context_data(**kwargs)
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context.update(
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{
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'next': self.next_url,
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'previous': self.previous_url
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}
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)
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return context
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def get_post_action_redirect(self):
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return self.post_action_redirect
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def get_success_url(self):
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return self.next_url or self.previous_url
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class ViewPermissionCheckMixin(object):
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view_permission = None
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def dispatch(self, request, *args, **kwargs):
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if self.view_permission:
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Permission.check_permissions(
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requester=self.request.user,
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permissions=(self.view_permission,)
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)
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return super(
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ViewPermissionCheckMixin, self
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).dispatch(request, *args, **kwargs)
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