Add has_role(role_name, user) utility to group, used like

group.has_role("chair", request.user). Remove the NomCom specific
group utilities, apparently they're not actually used.
 - Legacy-Id: 6217

ietf/group/models.py

@@ -54,26 +54,13 @@ class Group(GroupInfo):
         e = model.objects.filter(group=self).filter(**filter_args).order_by('-time', '-id')[:1]
         return e[0] if e else None
 
-    def is_chair(self, user):
-        chair = self.get_chair()
-        if chair:
-            return self.get_chair().person.user == user
-        else:
-            return False
-
-    def is_member(self, user):
-        members = self.get_members()
-        users = [member.person.user for member in members]
-        return user in users
+    def has_role(self, role_name, user):
+        return user.is_authenticated() and self.role_set.filter(name=role_name, person__user=user).exists()
 
     def get_chair(self):
         chair = self.role_set.filter(name__slug='chair')[:1]
         return chair and chair[0] or None
 
-    def get_members(self):
-        members = self.role_set.filter(name__slug__in=["chair", "member", "advisor", "liaison"])
-        return members
-
 class GroupHistory(GroupInfo):
     group = models.ForeignKey(Group, related_name='history_set')
     acronym = models.CharField(max_length=40)

ietf/nomcom/models.py

@@ -1,4 +1,4 @@
-# -*- coding: utf-8 -*-
+# -*- coding: utf-8 -*-
 import os
 
 from django.db import models

ietf/nomcom/templatetags/nomcom_tags.py

@@ -24,7 +24,7 @@ def is_chair(user, year):
     nomcom = get_nomcom_by_year(year=year)
     if has_role(user, "Secretariat"):
         return True
-    return nomcom.group.is_chair(user)
+    return nomcom.group.has_role("chair", user)
 
 
 @register.filter

ietf/nomcom/utils.py

@@ -64,18 +64,6 @@ def get_user_email(user):
     return mail
 
 
-def is_nomcom_member(user, nomcom):
-    is_group_member = nomcom.group.is_member(user)
-    if not is_group_member:
-        raise PermissionDenied("Must be nomcom member")
-
-
-def is_nomcom_chair(user, nomcom):
-    is_group_chair = nomcom.group.is_chair(user)
-    if not is_group_chair:
-        raise PermissionDenied("Must be nomcom chair")
-
-
 def get_hash_nominee_position(date, nominee_position_id):
     return hashlib.md5('%s%s%s' % (settings.SECRET_KEY, date, nominee_position_id)).hexdigest()
 

ietf/nomcom/views.py

@@ -1,4 +1,4 @@
- # -*- coding: utf-8 -*-
+ # -*- coding: utf-8 -*-
 
 import datetime
 
@@ -81,7 +81,7 @@ def private_key(request, year):
 def private_index(request, year):
     nomcom = get_nomcom_by_year(year)
     all_nominee_positions = NomineePosition.objects.get_by_nomcom(nomcom).not_duplicated()
-    is_chair = nomcom.group.is_chair(request.user)
+    is_chair = nomcom.group.has_role("chair", request.user)
     message = None
     if is_chair and request.method == 'POST':
         action = request.POST.get('action')