From 8cab13d50153c47833c40b858607084510a0e4b2 Mon Sep 17 00:00:00 2001
From: Florian Fischer <florian.fl.fischer@fau.de>
Date: Sun, 9 Jun 2019 16:33:27 +0200
Subject: handle cars cmd special cases

* print error if cars cmds couldn't be parsed
* print message if no cars are registered
---
 geldschieberbot.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/geldschieberbot.py b/geldschieberbot.py
index 80dedb7..e13b124 100644
--- a/geldschieberbot.py
+++ b/geldschieberbot.py
@@ -330,6 +330,10 @@ cmds["nimm"] = transaction
 def cars(sender, args, msg):
     # list cars
     if len(args) < 2 or args[1] in ["ls", "list"]:
+        if len(available_cars) == 0:
+            send("No cars registered yet.")
+            return 0
+
         ret_msg = ""
         header_fmt = "{} - service charge {}ct/km\n"
         if len(args) > 2:
@@ -380,6 +384,9 @@ def cars(sender, args, msg):
             nb[m] = 0
         balance[car] = nb
         send("added {} as an available car".format(car))
+    else:
+        send('ERROR: cmd not in form "{} [cmd]"'.format(args[0]))
+        return 1
 
     return 0
 
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