Say welcome using message with a middleware

Created a middleware to tell if request is sms or not and used this
middleware on the welcome message while deciding between say and message
verbs;

automated_survey/tests/surveys_test.py

@@ -18,6 +18,14 @@ def test_entry_point_redirection(self):
 
         assert expected_url in response.url
 
+    def test_show_message_verb_on_sms(self):
+        response = self.client.get(reverse('survey',
+                                   kwargs={'survey_id': self.survey.id}),
+                                   {'MessageSid': '123'})
+
+        assert '<Message>' in response.content.decode('utf8')
+        assert '<Say>' not in response.content.decode('utf8')
+
     def test_show_survey(self):
         response = self.client.get(reverse('survey',
                                    kwargs={'survey_id': self.survey.id}))

automated_survey/views/surveys.py

@@ -30,14 +30,16 @@ def show_survey(request, survey_id):
     }
 
     first_question_url = reverse('question', kwargs=first_question_ids)
-    text_response = twiml.Response()
 
-    text_response.say(
-        'Hello and thank you for taking the %s survey' %
-        survey.title)
-    text_response.redirect(first_question_url, method='GET')
+    welcome = 'Hello and thank you for taking the %s survey' % survey.title
+    twiml_response = twiml.Response()
+    if request.is_sms:
+        twiml_response.message(welcome)
+    else:
+        twiml_response.say(welcome)
+    twiml_response.redirect(first_question_url, method='GET')
 
-    return HttpResponse(text_response, content_type='application/xml')
+    return HttpResponse(twiml_response, content_type='application/xml')
 
 
 @require_POST

twilio_sample_project/settings/common.py

@@ -42,6 +42,7 @@
     'django.contrib.messages.middleware.MessageMiddleware',
     'django.middleware.clickjacking.XFrameOptionsMiddleware',
     'django.middleware.security.SecurityMiddleware',
+    'automated_survey.middleware.SMSMiddleware',
 )
 
 ROOT_URLCONF = 'twilio_sample_project.urls'