From 0125c544ee8e66049e63dced98e9837476a604d4 Mon Sep 17 00:00:00 2001
From: James Lu <GLolol@overdrivenetworks.com>
Date: Tue, 21 Feb 2017 21:45:43 -0800
Subject: [PATCH] utils: add an IRCParser class based off argparse, modified
 from @IotaSpencer's code

Closes #6.
---
 utils.py | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/utils.py b/utils.py
index 01bcab1..c4b85ff 100644
--- a/utils.py
+++ b/utils.py
@@ -10,6 +10,7 @@ import re
 import importlib
 import os
 import collections
+import argparse
 
 from .log import log
 from . import world, conf
@@ -27,6 +28,11 @@ class NotAuthorizedError(Exception):
     """
     pass
 
+class InvalidArgumentsError(TypeError):
+    """
+    Exception raised (by IRCParser and potentially others) when a bot command is given invalid arguments.
+    """
+
 class IncrementalUIDGenerator():
     """
     Incremental UID Generator module, adapted from InspIRCd source:
@@ -547,3 +553,11 @@ def wrapArguments(prefix, args, length, separator=' ', max_args_per_line=0):
         strings.append(buf)
 
     return strings
+
+class IRCParser(argparse.ArgumentParser):
+    """
+    Wrapper around argparse.ArgumentParser, without quitting on usage errors.
+    """
+
+    def error(self, message):
+        raise InvalidArgumentsError(message)