Fix helpers to return None when Exception is thrown

Author: RutgerRauws

notubiz/api/_helpers.py

@@ -1,4 +1,5 @@
 from datetime import datetime
+from typing import Optional
 
 def get_attribute(attributes, id) -> str:
     attribute = [attribute for attribute in attributes if attribute["id"] == id]
@@ -10,17 +11,23 @@ def get_attribute(attributes, id) -> str:
 
     return attribute[0]["value"]
 
-def get_title(attributes) -> str:
-    return get_attribute(attributes, 1)
+def get_title(attributes) -> Optional[str]:
+    try:
+        return get_attribute(attributes, 1)
+    except Exception:
+        return None
 
-def get_description(attributes):
+def get_description(attributes) -> Optional[str]:
     try:
         return get_attribute(attributes, 3)
     except Exception:
-        return ""
+        return None
 
-def get_location(attributes):
-    return get_attribute(attributes, 50)
+def get_location(attributes) -> Optional[str]:
+    try:
+        return get_attribute(attributes, 50)
+    except Exception:
+        return None
 
 def parse_date(date_string : str) -> datetime:
     return datetime.strptime(date_string, "%Y-%m-%d %H:%M:%S")