75 lines
2.9 KiB
Python
75 lines
2.9 KiB
Python
import logging
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from django.db import models
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from django.contrib.auth.models import User
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from django.dispatch import receiver
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from django.db.models.signals import post_save
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from student.models import CourseEnrollment
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from xmodule.modulestore.django import modulestore
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from xmodule.course_module import CourseDescriptor
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FORUM_ROLE_ADMINISTRATOR = 'Administrator'
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FORUM_ROLE_MODERATOR = 'Moderator'
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FORUM_ROLE_COMMUNITY_TA = 'Community TA'
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FORUM_ROLE_STUDENT = 'Student'
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@receiver(post_save, sender=CourseEnrollment)
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def assign_default_role(sender, instance, **kwargs):
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if instance.user.is_staff:
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role = Role.objects.get_or_create(course_id=instance.course_id, name="Moderator")[0]
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else:
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role = Role.objects.get_or_create(course_id=instance.course_id, name="Student")[0]
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logging.info("assign_default_role: adding %s as %s" % (instance.user, role))
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instance.user.roles.add(role)
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class Role(models.Model):
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name = models.CharField(max_length=30, null=False, blank=False)
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users = models.ManyToManyField(User, related_name="roles")
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course_id = models.CharField(max_length=255, blank=True, db_index=True)
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class Meta:
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# use existing table that was originally created from django_comment_client app
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db_table = 'django_comment_client_role'
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def __unicode__(self):
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return self.name + " for " + (self.course_id if self.course_id else "all courses")
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def inherit_permissions(self, role): # TODO the name of this method is a little bit confusing,
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# since it's one-off and doesn't handle inheritance later
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if role.course_id and role.course_id != self.course_id:
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logging.warning("%s cannot inherit permissions from %s due to course_id inconsistency", \
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self, role)
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for per in role.permissions.all():
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self.add_permission(per)
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def add_permission(self, permission):
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self.permissions.add(Permission.objects.get_or_create(name=permission)[0])
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def has_permission(self, permission):
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course_loc = CourseDescriptor.id_to_location(self.course_id)
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course = modulestore().get_instance(self.course_id, course_loc)
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if self.name == FORUM_ROLE_STUDENT and \
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(permission.startswith('edit') or permission.startswith('update') or permission.startswith('create')) and \
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(not course.forum_posts_allowed):
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return False
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return self.permissions.filter(name=permission).exists()
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class Permission(models.Model):
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name = models.CharField(max_length=30, null=False, blank=False, primary_key=True)
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roles = models.ManyToManyField(Role, related_name="permissions")
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class Meta:
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# use existing table that was originally created from django_comment_client app
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db_table = 'django_comment_client_permission'
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def __unicode__(self):
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return self.name
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