Adds transcription feature

We can now support transcription feature from Twilio, updating the
response when it arrives.

automated_survey/tests/questions_test.py

@@ -27,6 +27,15 @@ def test_show_text_question_during_a_call(self):
         assert '<Record' in text_response.content.decode('utf8')
         assert question_store_url in text_response.content.decode('utf8')
 
+    def test_transcription_is_enabled(self):
+        save_url = reverse('save_response', kwargs=self.question_ids)
+        expected_attribute = 'transcribeCallback="%s"' % (save_url)
+
+        text_response = self.client.get(reverse('question',
+                                                kwargs=self.question_ids))
+
+        assert expected_attribute in text_response.content.decode('utf8')
+
     def test_show_numeric_question_during_a_call(self):
         self.question.kind = Question.NUMERIC
         self.question.save()

automated_survey/views/question_responses.py

@@ -17,10 +17,10 @@ def save_response(request, survey_id, question_id):
     if not next_question:
         return goodbye(request)
     else:
-        return redirect_over_twiml(next_question.id, survey_id)
+        return next_question_redirect(next_question.id, survey_id)
 
 
-def redirect_over_twiml(question_id, survey_id):
+def next_question_redirect(question_id, survey_id):
     parameters = {'survey_id': survey_id, 'question_id': question_id}
     question_url = reverse('question', kwargs=parameters)
 

automated_survey/views/questions.py

@@ -40,7 +40,10 @@ def voice_question(question):
 
     action = save_response_url(question)
     if question.kind == Question.TEXT:
-        twiml_response.record(action=action, method='POST')
+        kwargs = {'maxLength': 6,
+                  'transcribe': True,
+                  'transcribeCallback': action}
+        twiml_response.record(action=action, method='POST', **kwargs)
     else:
         twiml_response.gather(action=action, method='POST')
     return twiml_response