"""X-Chat 2.0 plugin to hide what ignored people say on channel.

Messages from people (nicknames) that are ignored (using /ignore) are
printed with the same foreground and background color. This is better
than normal /ignore, since it reduces your confusion by making it clear
that the ignored people are talking. Also, you can select the text with
a mouse and see what they're saying, in case it is something important.
(If you do that a lot, there's no point in using /ignore, though.)

Place in your .xchat2 directory and either reload X-Chat or
/PY LOAD whiteout.py

0.2     15 Aug 2005     Remove ":+" and ":-" prefixes from the message of
                        a user. I should read about the IRC protocol.
0.1     10 Aug 2005     Initial version, based on Scott James Remnant's
                        topicdiff.py.
"""

__author__ = "Lars Wirzenius <liw@iki.fi>"
__copyright__ = "Copyright 2005 Lars Wirzenius <liw@iki.fi>."
__licence__ = "MIT"

__module_name__ = "whiteout"
__module_version__ = "0.2"
__module_description__ = \
    "Show ignored channel messages with same fore/background color"

import re
import xchat

# Change this to select the color you want to use.
COLOR = 0

nick_pattern = re.compile(r":(?P<nick>[^!]+)!")

def matches_ignore_mask(mask, userspec):
    regexp = ":" # userspec always seems to start with a colon
    for c in mask:
        if c == "*":
            regexp += ".*"
        elif c == "?":
            regexp += "."
        elif c in ".\\":
            regexp += "\\" + c
        else:
            regexp += c

    if "!" not in mask:
        regexp += "!.*"
        
    return re.match(regexp, userspec) != None

def is_ignored(userspec):
    for ignored in xchat.get_list("ignore"):
        if ignored.flags & 1 and matches_ignore_mask(ignored.mask, userspec):
            return True
    return False

def parse_nickname(userspec):
    m = nick_pattern.match(userspec)
    if m:
        return m.group("nick")
    else:
        return None

def privmsg_cb(word, word_eol, userdata):
    ctx = xchat.get_context()
    
    channel = ctx.get_info("channel")
    nickname = parse_nickname(word[0])
    if is_ignored(word[0]):
        start_color = "\003%02d,%02d" % (COLOR, COLOR)
        end_color = "\003"
        msg = word_eol[3]
        if msg[:2] in [":-", ":+"]:
            msg = msg[2:]
        elif msg[:1] == ":":
            msg = msg[1:]
        ctx.emit_print("Channel Message", nickname, 
                       start_color + msg + end_color)
        return xchat.EAT_ALL

    return xchat.EAT_NONE

xchat.hook_server("PRIVMSG", privmsg_cb)
xchat.prnt("%s %s loaded" % (__module_name__, __module_version__))