1 files changed, 68 insertions, 1 deletions
diff --git a/geldschieberbot.py b/geldschieberbot.py
index 26ee8e1..c011b40 100644
--- a/geldschieberbot.py
+++ b/geldschieberbot.py
@@ -149,7 +149,7 @@ gib amount recipient - give money to recipient
 zieh amount donor - get money from donor
 nimm amount donor - get money from donor
 
-transfer amount source destination - transfer amount of your balance with source to destination
+transfer amount source destination - transfer amount of your balance from source to destination
 
 cars [cmd] - interact with the available cars
 cars [list | ls] - list available cars and their service charge
@@ -313,6 +313,73 @@ cmds["gib"] = transaction
 cmds["zieh"] = transaction
 cmds["nimm"] = transaction
 
+def transfer(sender, args, msg):
+    if len(args) < 4:
+        send('ERROR: not in form "{} amount source destination"'.format(args[0]))
+        return 1
+
+    sender_num = sender
+    if not sender in num2name:
+        send('ERROR: you must register first')
+        return 1
+    else:
+        sender = num2name[sender]
+
+    try:
+        amount = int(args[1])
+    except:
+        send("ERROR: amount must be a number")
+        return 1
+
+    if amount < 0:
+        send("ERROR: amount must be positiv")
+        return 1
+
+    source, destination = args[2:4]
+    if source not in balance:
+        send("ERROR: source {} not known".format(source))
+        return 1
+
+    elif destination not in balance:
+        send("ERROR: destination {} not known".format(destination))
+        return 1
+
+    output = ""
+    global record_changes
+    record_changes = False
+    change = [args]
+
+    ret, err = transaction(sender_num, "!zieh {} {}".format(source,  amount).split(), "")
+    if err:
+        # No changes yet we can fail
+        return None, err
+    else:
+        output += ret
+    change.append((sender, source, amount))
+
+    ret, err = transaction(sender_num, "!schieb {} {}".format(destination,  amount).split(), "")
+    if err:
+        output += "ERROR: " + err + "\nThe balance may be in a inconsistent state please take care manually"
+        return output, None
+    else:
+        output += ret
+    change.append((sender, source, amount))
+
+    ret, err = transaction(name2num[source], "!zieh {} {}".format(destination,  amount).split(), "")
+    if err:
+        output += "ERROR: " + err + "\nThe balance may be in a inconsistent state please take care manually"
+        return output, None
+    else:
+        output += ret
+    change.append((sender, source, amount))
+
+    if record_changes and not dry_run:
+        changes[sender].append(change)
+
+    return output, None
+
+cmds["transfer"] = transfer
+
 def cars(sender, args, msg):
     # list cars
     if len(args) < 2 or args[1] in ["ls", "list"]: