114 lines
3.6 KiB
Python
114 lines
3.6 KiB
Python
from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from django.contrib.contenttypes.models import ContentType
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from django.contrib.contenttypes import generic
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from django.contrib.auth.models import User
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from django.core.exceptions import PermissionDenied
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from django.core.urlresolvers import reverse
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from permissions.models import Permission
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from acls.widgets import object_w_content_type_icon
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class AccessEntryManager(models.Manager):
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def grant(self, permission, requester, obj):
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"""
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Grant a permission (what), (to) a requester, (on) a specific object
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"""
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access_entry, created = self.model.objects.get_or_create(
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permission=permission,
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holder_type=ContentType.objects.get_for_model(requester),
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holder_id=requester.pk,
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content_type=ContentType.objects.get_for_model(obj),
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object_id=obj.pk
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)
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return created
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def revoke(self, permission, holder, obj):
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try:
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access_entry = self.model.objects.get(
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permission=permission,
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holder_type=ContentType.objects.get_for_model(holder),
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holder_id=holder.pk,
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content_type=ContentType.objects.get_for_model(obj),
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object_id=obj.pk
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)
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access_entry.delete()
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return True
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except self.model.DoesNotExist:
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return False
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def check_accesses(self, permission_list, requester, obj):
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for permission_item in permission_list:
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permission = get_object_or_404(Permission,
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namespace=permission_item['namespace'], name=permission_item['name'])
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try:
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access_entry = self.model.objects.get(
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permission=permission,
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holder_type=ContentType.objects.get_for_model(requester),
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holder_id=requester.pk,
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content_type=ContentType.objects.get_for_model(obj),
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object_id=obj.pk
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)
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return True
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except self.model.DoesNotExist:
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raise PermissionDenied(ugettext(u'Insufficient permissions.'))
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def get_acl_url(self, obj):
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content_type = ContentType.objects.get_for_model(obj)
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return reverse('acl_list', args=[content_type.app_label, content_type.model, obj.pk])
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def get_holders_for(self, obj):
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content_type = ContentType.objects.get_for_model(obj)
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holder_list = []
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for access_entry in self.model.objects.filter(content_type=content_type, object_id=obj.pk):
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entry = {
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'object': access_entry.holder_object,
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'label': '%s: %s' % (access_entry.holder_type, access_entry.holder_object),
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'widget': object_w_content_type_icon(access_entry.holder_object),
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}
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if entry not in holder_list:
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holder_list.append(entry)
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return holder_list
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def get_acls_for_holder(self, obj, holder):
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holder_type = ContentType.objects.get_for_model(holder)
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content_type = ContentType.objects.get_for_model(obj)
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return [access.permission for access in self.model.objects.filter(content_type=content_type, object_id=obj.pk, holder_type=holder_type, holder_id=holder.pk)]
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class AccessEntry(models.Model):
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permission = models.ForeignKey(Permission, verbose_name=_(u'permission'))
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holder_type = models.ForeignKey(
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ContentType,
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related_name='access_holder',
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limit_choices_to={'model__in': ('user', 'group', 'role')}
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)
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holder_id = models.PositiveIntegerField()
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holder_object = generic.GenericForeignKey(
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ct_field='holder_type',
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fk_field='holder_id'
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)
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content_type = models.ForeignKey(
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ContentType,
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related_name='object_content_type'
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)
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object_id = models.PositiveIntegerField()
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content_object = generic.GenericForeignKey(
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ct_field='content_type',
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fk_field='object_id'
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)
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objects = AccessEntryManager()
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class Meta:
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verbose_name = _(u'access entry')
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verbose_name_plural = _(u'access entries')
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def __unicode__(self):
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return u'%s: %s' % (self.content_type, self.content_object)
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