fix: Send create user email for password resets where we have an email and person, but no user. (#7729)

* fix: Send create user email for password resets where we have an email and person, but no user account

This fixes https://github.com/ietf-tools/datatracker/issues/6458

* fix: create User straight away and use nomral password reset

---------

Co-authored-by: Robert Sparks <rjsparks@nostrum.com>

ietf/ietfauth/tests.py

@@ -527,6 +527,24 @@ class IetfAuthTests(TestCase):
         self.assertIn(secondary_address, to)
         self.assertNotIn(inactive_secondary_address, to)
 
+    def test_reset_password_without_user(self):
+        """Reset password using email address for person without a user account"""
+        url = urlreverse('ietf.ietfauth.views.password_reset')
+        email = EmailFactory()
+        person = email.person
+        # Remove the user object from the person to get a Email/Person without User:
+        person.user = None
+        person.save()
+        # Remove the remaining User record, since reset_password looks for that by username:
+        User.objects.filter(username__iexact=email.address).delete()
+        empty_outbox()
+        r = self.client.post(url, { 'username': email.address })
+        self.assertEqual(len(outbox), 1)
+        lastReceivedEmail = outbox[-1]
+        self.assertIn(email.address, lastReceivedEmail.get('To'))
+        self.assertTrue(lastReceivedEmail.get('Subject').startswith("Confirm password reset"))
+        self.assertContains(r, "Your password reset request has been successfully received", status_code=200)
+
     def test_review_overview(self):
         review_req = ReviewRequestFactory()
         assignment = ReviewAssignmentFactory(review_request=review_req,reviewer=EmailFactory(person__user__username='reviewer'))

ietf/ietfauth/views.py

@@ -491,9 +491,19 @@ def password_reset(request):
             if not user:
                 # try to find user ID from the email address
                 email = Email.objects.filter(address=submitted_username).first()
-                if email and email.person and email.person.user:
-                    user = email.person.user
-
+                if email and email.person:
+                    if email.person.user:
+                        user = email.person.user
+                    else: 
+                        # Create a User record with this (conditioned by way of Email) username
+                        # Don't bother setting the name or email fields on User - rely on the
+                        # Person pointer.
+                        user = User.objects.create(
+                            username=email.address.lower(), 
+                            is_active=True,
+                        )
+                        email.person.user = user
+                        email.person.save()
             if user and user.person.email_set.filter(active=True).exists():
                 data = {
                     'username': user.username,