Add exceptions in /chat_activity

apps/group_stat_api.py

@@ -42,21 +42,35 @@ def chat_activity():
     from_date = request.args.get("from_date")
     to_date = request.args.get("to_date")
     
+    if not from_date or not to_date:
+        return jsonify({
+            "err": "from_date/to_date empty"
+        }),422
+
     date_format = request.args.get("date_format")
     group_by = request.args.get("group_by")
     
-    if not date_format:
+    group_by = group_by if group_by else "day"
-        date_format = "%Y-%m-%d"
+    date_format = date_format if date_format else "%Y-%m-%d"
-
-    if not group_by:
-        group_by = "day"
      
     dates = []
     counts = []
     
-    if from_date and to_date:
+    try:
         from_date = datetime.strptime(from_date, date_format)
         to_date   = datetime.strptime(to_date, date_format)
+    except ValueError:
+        return jsonify({
+            "from_date": from_date,
+            "to_date": to_date,
+            "date_format": date_format,
+            "err":"can't format datatime obj"
+        }),422
+    
+    if not group_by in ["day","week","month","year"]:
+        return jsonify({
+            "err":"invalid group_by"
+        }),422
 
     query = (Message
         .select(fn.date_trunc(group_by, Message.timestamp).alias('range'), fn.count(Message.id).alias('count'))
@@ -66,7 +80,7 @@ def chat_activity():
     )
 
     for group in query:
-            dates.append(group.range.strftime("%Y-%m-%d"))
+        dates.append(group.range.strftime(date_format))
         counts.append(group.count)
 
     return jsonify({