dashboard: create user profile on saml logon

Closes #42

circle/circle/settings/base.py

@@ -382,3 +382,7 @@ if get_env_variable('DJANGO_SAML', 'FALSE') == 'TRUE':
         'DJANGO_SAML_ATTRIBUTE_MAPPING',
         '{"mail": ["email"], "sn": ["last_name"], '
         '"uid": ["username"], "cn": ["first_name"]}'))
+    SAML_CREATE_UNKNOWN_USER = True
+    if get_env_variable('DJANGO_SAML_ORG_ID_ATTRIBUTE', None) is not None:
+        SAML_ORG_ID_ATTRIBUTE = get_env_variable(
+            'DJANGO_SAML_ORG_ID_ATTRIBUTE')

circle/dashboard/models.py

@@ -20,3 +20,18 @@ class Profile(Model):
     org_id = CharField(  # may be populated from eduPersonOrgId field
         unique=True, blank=True, null=True, max_length=64,
         help_text=_('Unique identifier of the person, e.g. a student number.'))
+
+
+if hasattr(settings, 'SAML_ORG_ID_ATTRIBUTE'):
+    from djangosaml2.signals import pre_user_save
+
+    def save_org_id(sender, attributes, user_modified):
+        atr = settings.SAML_ORG_ID_ATTRIBUTE
+        value = attributes[atr]
+        profile, created = Profile.objects.get_or_create(user=sender)
+        if created or profile.org_id != value:
+            profile.org_id = value
+            profile.save()
+        return False
+
+    pre_user_save.connect(save_org_id, weak=False)