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from django import template
from django.template import resolve_variable
from django.contrib.auth.models import Group
register = template.Library()
#
# TODO: There must be a shorter way to do this...
#
@register.tag()
def ifusergroup(parser, token):
""" Check to see if the currently logged in user belongs to a specific
group. Requires the Django authentication contrib app and middleware.
Usage: {% ifusergroup Admins %} ... {% endifusergroup %}
"""
try:
tag, group = token.split_contents()
except ValueError:
raise template.TemplateSyntaxError("Tag 'ifusergroup' requires 1 argument.")
nodelist = parser.parse(('endifusergroup',))
parser.delete_first_token()
return GroupCheckNode(group, nodelist)
@register.tag()
def ifuser(parser, token):
""" Check to see if user is currently logged in.
Usage: {% ifuser %} ... {% endifusergroup %}
"""
nodelist = parser.parse(('endifuser',))
parser.delete_first_token()
return UserCheckNode(nodelist)
@register.tag()
def ifnotuser(parser, token):
""" Check to see if user is currently logged in.
Usage: {% ifuser %} ... {% endifusergroup %}
"""
nodelist = parser.parse(('endifnotuser',))
parser.delete_first_token()
return NotUserCheckNode(nodelist)
class NotUserCheckNode(template.Node):
def __init__(self, nodelist):
self.nodelist = nodelist
def render(self, context):
user = resolve_variable('user', context)
if user.is_authenticated():
return ''
return self.nodelist.render(context)
class UserCheckNode(template.Node):
def __init__(self, nodelist):
self.nodelist = nodelist
def render(self, context):
user = resolve_variable('user', context)
if not user.is_authenticated():
return ''
return self.nodelist.render(context)
class GroupCheckNode(template.Node):
def __init__(self, group, nodelist):
self.group = group
self.nodelist = nodelist
def render(self, context):
user = resolve_variable('user', context)
if not user.is_authenticated():
return ''
try:
group = Group.objects.get(name=self.group)
except Group.DoesNotExist:
return ''
if group in user.groups.all():
return self.nodelist.render(context)
return ''
|
