[WIP]

Let the API return a 400 error message if the service name is a duplicate.

app/main/forms.py

@@ -3,6 +3,8 @@ import pytz
 
 from flask_wtf import FlaskForm as Form
 from datetime import datetime, timedelta
+
+from notifications_python_client.errors import HTTPError
 from notifications_utils.recipients import (
     validate_phone_number,
     InvalidPhoneError
@@ -211,13 +213,7 @@ class TextNotReceivedForm(Form):
 
 
 class AddServiceForm(Form):
-    def __init__(self, names_func, *args, **kwargs):
-        """
-        Keyword arguments:
-        names_func -- Returns a list of unique service_names already registered
-        on the system.
-        """
-        self._names_func = names_func
+    def __init__(self, *args, **kwargs):
         super(AddServiceForm, self).__init__(*args, **kwargs)
 
     name = StringField(
@@ -227,11 +223,27 @@ class AddServiceForm(Form):
         ]
     )
 
+    service_id = HiddenField('service_id')
+
+    def _create_service(self, service_name, email_from):
+        from app import service_api_client
+        from flask import current_app, session
+        service_id = service_api_client.create_service(service_name=service_name,
+                                                       message_limit=current_app.config['DEFAULT_SERVICE_LIMIT'],
+                                                       restricted=True,
+                                                       user_id=session['user_id'],
+                                                       email_from=email_from)
+        session['service_id'] = service_id
+        return service_id
+
     def validate_name(self, a):
         from app.utils import email_safe
-        # make sure the email_from will be unique to all services
-        if email_safe(a.data) in self._names_func():
-            raise ValidationError('This service name is already in use')
+        email_from = email_safe(a.data)
+        try:
+            self.service_id = self._create_service(a.data, email_from)
+        except HTTPError as e:
+            if e.status_code == 400 and e.message['name']:
+                raise ValidationError(message=e.message['name'][0])
 
 
 class ServiceNameForm(Form):