move invite error handler to top level

ensure we catch org errors as well as regular errors

app/__init__.py

@@ -13,6 +13,7 @@ from flask import (
     flash,
     g,
     make_response,
+    redirect,
     render_template,
     request,
     session,
@@ -59,6 +60,7 @@ from app.navigation import (
     MainNavigation,
     OrgNavigation,
 )
+from app.notify_client import InviteTokenError
 from app.notify_client.api_key_api_client import api_key_api_client
 from app.notify_client.billing_api_client import billing_api_client
 from app.notify_client.complaint_api_client import complaint_api_client
@@ -702,6 +704,11 @@ def register_errorhandlers(application):  # noqa (C901 too complex)
 
         return _error_response(error.code)
 
+    @application.errorhandler(InviteTokenError)
+    def handle_bad_invite_token(error):
+        flash(str(error))
+        return redirect(url_for('main.sign_in'))
+
     @application.errorhandler(500)
     @application.errorhandler(Exception)
     def handle_bad_request(error):

app/main/forms.py

@@ -4,6 +4,7 @@ from itertools import chain
 
 import pytz
 from flask import request
+from flask_login import current_user
 from flask_wtf import FlaskForm as Form
 from flask_wtf.file import FileAllowed
 from flask_wtf.file import FileField as FileField_wtf
@@ -500,7 +501,7 @@ class InviteUserForm(PermissionsForm):
         self.invalid_email_address = invalid_email_address.lower()
 
     def validate_email_address(self, field):
-        if field.data.lower() == self.invalid_email_address:
+        if field.data.lower() == self.invalid_email_address and not current_user.platform_admin:
             raise ValidationError("You cannot send an invitation to yourself")
 
 
@@ -512,7 +513,7 @@ class InviteOrgUserForm(StripWhitespaceForm):
         self.invalid_email_address = invalid_email_address.lower()
 
     def validate_email_address(self, field):
-        if field.data.lower() == self.invalid_email_address:
+        if field.data.lower() == self.invalid_email_address and not current_user.platform_admin:
             raise ValidationError("You cannot send an invitation to yourself")
 
 

app/main/views/invites.py

@@ -12,16 +12,11 @@ from app.models.user import (
     User,
     Users,
 )
-from app.notify_client import InviteTokenError
 
 
 @main.route("/invitation/<token>")
 def accept_invite(token):
-    try:
-        invited_user = InvitedUser.from_token(token)
-    except InviteTokenError as exception:
-        flash(str(exception))
-        return redirect(url_for('main.sign_in'))
+    invited_user = InvitedUser.from_token(token)
 
     if not current_user.is_anonymous and current_user.email_address.lower() != invited_user.email_address.lower():
         message = Markup("""
@@ -78,6 +73,7 @@ def accept_invite(token):
 @main.route("/organisation-invitation/<token>")
 def accept_org_invite(token):
     invited_org_user = InvitedOrgUser.from_token(token)
+
     if not current_user.is_anonymous and current_user.email_address.lower() != invited_org_user.email_address.lower():
         message = Markup("""
             You’re signed in as {}.

app/models/__init__.py

@@ -77,7 +77,3 @@ class ModelList(ABC, Sequence):
 
     def __radd__(self, other):
         return list(other) + list(self)
-
-
-class InviteTokenError(Exception):
-    pass

tests/app/main/views/test_accept_invite.py

@@ -308,12 +308,18 @@ def test_cancelled_invited_user_accepts_invited_redirect_to_cancelled_invitation
     assert page.h1.string.strip() == 'The invitation you were sent has been cancelled'
 
 
+@pytest.mark.parametrize('admin_endpoint, api_endpoint', [
+    ('main.accept_invite', 'app.invite_api_client.check_token'),
+    ('main.accept_org_invite', 'app.org_invite_api_client.check_token'),
+])
 def test_new_user_accept_invite_with_malformed_token(
+    admin_endpoint,
+    api_endpoint,
     client,
     service_one,
     mocker,
 ):
-    mocker.patch('app.invite_api_client.check_token', side_effect=HTTPError(
+    mocker.patch(api_endpoint, side_effect=HTTPError(
         response=Mock(
             status_code=400,
             json={
@@ -328,7 +334,7 @@ def test_new_user_accept_invite_with_malformed_token(
         message={'invitation': 'Something’s wrong with this link. Make sure you’ve copied the whole thing.'}
     ))
 
-    response = client.get(url_for('main.accept_invite', token='thisisnotarealtoken'), follow_redirects=True)
+    response = client.get(url_for(admin_endpoint, token='thisisnotarealtoken'), follow_redirects=True)
 
     assert response.status_code == 200
     page = BeautifulSoup(response.data.decode('utf-8'), 'html.parser')