Users can set a value that appears as the sender of a text message.

It can be up to eleven characters alpha numeric, no special characters
allowed.

app/main/forms.py

@@ -12,7 +12,8 @@ from wtforms import (
     FileField,
     BooleanField,
     HiddenField,
-    IntegerField)
+    IntegerField
+)
 from wtforms.fields.html5 import EmailField, TelField
 from wtforms.validators import (DataRequired, Email, Length, Regexp)
 
@@ -318,3 +319,13 @@ class ProviderForm(Form):
 
 class ServiceReplyToEmailFrom(Form):
     email_address = email_address()
+
+
+class ServiceSmsSender(Form):
+    sms_sender = StringField('', validators=[Length(max=11,
+                             message="Text message sender can't be longer than 11 characters")])
+
+    def validate_sms_sender(form, field):
+        import re
+        if not re.match('^[a-zA-Z0-9\s]+$', field.data):
+            raise ValidationError('Sms text message sender can only contain alpha-numeric characters')

app/main/views/service_settings.py

@@ -23,7 +23,8 @@ from app.main.forms import (
     ConfirmPasswordForm,
     ServiceNameForm,
     RequestToGoLiveForm,
-    ServiceReplyToEmailFrom
+    ServiceReplyToEmailFrom,
+    ServiceSmsSender
 )
 from app import user_api_client
 from app import current_service
@@ -261,3 +262,29 @@ def service_set_reply_to_email(service_id):
     return render_template(
         'views/service-settings/set-reply-to-email.html',
         form=form)
+
+
+@main.route("/services/<service_id>/service-settings/set-sms-sender", methods=['GET', 'POST'])
+@login_required
+@user_has_permissions('manage_settings', admin_override=True)
+def service_set_sms_sender(service_id):
+    form = ServiceSmsSender()
+    if request.method == 'GET':
+        form.sms_sender.data = current_service.get('sms_sender')
+    if form.validate_on_submit():
+        message = 'SMS Sender set to {}'.format(form.sms_sender.data)
+        service_api_client.update_service(
+            current_service['id'],
+            current_service['name'],
+            current_service['active'],
+            current_service['message_limit'],
+            current_service['restricted'],
+            current_service['users'],
+            current_service['email_from'],
+            current_service['reply_to_email_address'],
+            sms_sender=form.sms_sender.data if form.sms_sender.data else None)
+        flash(message, 'default_with_tick')
+        return redirect(url_for('.service_settings', service_id=service_id))
+    return render_template(
+        'views/service-settings/set-sms-sender.html',
+        form=form)