Changed calc to run on a separate thread

calc.py

@@ -1,48 +1,27 @@
 from helpers import *
+import threading
 
-calc_users        = open_json_file("calc", [])
+calc_users = open_json_file("calc", [])
-math_operators    = ["+", "-", "*", "/", "&", "|"]
-ignore_operators  = ["**", "&&", "||"] # ** may be too intensive, the others cause syntax errors
 calc_perm = "utils.calc"
 
+def calculate(text):
+    pass
 
-def calc(text):
+def calc(text, sender):
-    """
+    try:
-    extracts a mathematical expression from `text`
+        result = calculate(text)
-    returns (expression, result) or None
+        msg(sender, "&2=== Calc:&6 %s" % result)
-    """
+    except:
-    expression = ""
+        msg(sender, "&2=== Calc:&c Something went wrong while calculating - calulation aborted")
-    should_calc = False
-    for char in text:
-        if char.isdigit() or (expression and char == ".") or (should_calc and char == " "):
-            expression += char
-        elif char in math_operators:
-            # calculation must include at least 1 operator
-            should_calc = True
-            expression += char
-        elif should_calc and char.isalpha():
-            # don't include any more text in the calculation
-            break
-    if should_calc and not any(op in expression for op in ignore_operators):
-        try:
-            result = str(eval(expression)) # pylint: disable = W0123
-        except: # pylint: disable = W0702
-            # we can run into all kinds of errors here
-            # most probably SyntaxError
-            return None
-        return (expression, result)
-    return None
-
 
 @hook.event("player.AsyncPlayerChatEvent", "monitor")
 def on_calc_chat(event):
     sender = event.getPlayer()
     message = event.getMessage()
     if not event.isCancelled() and uid(sender) in calc_users and sender.hasPermission(calc_perm):
-        output = calc(message)
+        thread = threading.Thread(target=calc, args=(message, sender))
-        if output:
+        thread.daemon = True
-            msg(sender, "&2=== Calc: &e" + output[0] + " &2= &c" + output[1])
+        thread.start()
-
 
 @hook.command("calc", description="Toggles chat calculations")
 def on_calc_command(sender, command, label, args):