Declare IRCd casemapping in protocol modules, and respect these in utils.nickToUid

This adds a new utils.toLower(irc, text) function which returns the lowercased version of <text> based on <irc>'s declared case mapping.

Closes #75.

protocols/inspircd.py

@@ -10,6 +10,8 @@ from log import log
 
 from classes import *
 
+casemapping = 'ascii'
+
 # Raw commands sent from servers vary from protocol to protocol. Here, we map
 # non-standard names to our hook handlers, so plugins get the information they need.
 

protocols/ts6.py

@@ -17,6 +17,7 @@ from inspircd import handle_privmsg, handle_kill, handle_kick, handle_error, \
     handle_quit, handle_nick, handle_save, handle_squit, handle_mode, handle_topic, \
     handle_notice
 
+casemapping = 'rfc1459'
 hook_map = {'SJOIN': 'JOIN', 'TB': 'TOPIC', 'TMODE': 'MODE', 'BMASK': 'MODE'}
 
 def _send(irc, sid, msg):

utils.py

@@ -122,9 +122,18 @@ def add_hook(func, command):
     command = command.upper()
     command_hooks[command].append(func)
 
+def toLower(irc, text):
+    if irc.proto.casemapping == 'rfc1459':
+        text = text.replace('{', '[')
+        text = text.replace('}', ']')
+        text = text.replace('|', '\\')
+        text = text.replace('~', '^')
+    return text.lower()
+
 def nickToUid(irc, nick):
+    nick = toLower(irc, nick)
     for k, v in irc.users.items():
-        if v.nick == nick:
+        if toLower(irc, v.nick) == nick:
             return k
 
 def clientToServer(irc, numeric):