Updated the Listening template to allow for a dynamic amount of parts

app.py

@@ -167,6 +167,8 @@ def save_listening():
         template = getListeningTemplate()
         id = str(uuid.uuid4())
         for i, part in enumerate(parts, start=0):
+            part_template = getListeningPartTemplate()
+
             file_name = str(uuid.uuid4()) + ".mp3"
             sound_file_path = AUDIO_FILES_PATH + file_name
             firebase_file_path = FIREBASE_LISTENING_AUDIO_FILES_PATH + file_name
@@ -175,8 +177,11 @@ def save_listening():
             else:
                 text_to_speech(part["text"], sound_file_path)
             file_url = upload_file_firebase_get_url(FIREBASE_BUCKET, firebase_file_path, sound_file_path)
-            template["parts"][i]["audio"]["source"] = file_url
-            template["parts"][i]["exercises"] = part["exercises"]
+            
+            part_template["audio"]["source"] = file_url
+            part_template["exercises"] = part["exercises"]
+
+            template['parts'].append(part_template)
 
         if minTimer != LISTENING_MIN_TIMER_DEFAULT:
             template["minTimer"] = minTimer