Limnoria/src/ircutils.py

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2003-03-12 07:26:59 +01:00
#!/usr/bin/env python
###
# Copyright (c) 2002, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
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"""
Provides a great number of useful utility functions IRC. Things to muck around
with hostmasks, set bold or color on strings, IRC-case-insensitive dicts, a
nick class to handle nicks (so comparisons and hashing and whatnot work in an
IRC-case-insensitive fashion), and numerous other things.
"""
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from fix import *
import re
import string
import fnmatch
import operator
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def isUserHostmask(s):
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"""Returns whether or not the string s is a valid User hostmask."""
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p1 = s.find('!')
p2 = s.find('@')
if p1 < p2-1 and p1 >= 1 and p2 >= 3 and len(s) > p2+1:
return True
else:
return False
def isServerHostmask(s):
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"""Returns True if s is a valid server hostmask."""
return not isUserHostmask(s)
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def nickFromHostmask(hostmask):
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"""Returns the nick from a user hostmask."""
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assert isUserHostmask(hostmask)
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return nick(hostmask.split('!', 1)[0])
def userFromHostmask(hostmask):
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"""Returns the user from a user hostmask."""
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assert isUserHostmask(hostmask)
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return hostmask.split('!', 1)[1].split('@', 1)[0]
def hostFromHostmask(hostmask):
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"""Returns the host from a user hostmask."""
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assert isUserHostmask(hostmask)
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return hostmask.split('@', 1)[1]
def splitHostmask(hostmask):
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"""Returns the nick, user, host of a user hostmask."""
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assert isUserHostmask(hostmask)
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nck, rest = hostmask.split('!', 1)
user, host = rest.split('@', 1)
return (nick(nck), user, host)
def joinHostmask(nick, ident, host):
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"""Joins the nick, ident, host into a user hostmask."""
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assert nick and ident and host
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return '%s!%s@%s' % (nick, ident, host)
_lowertrans = string.maketrans(string.ascii_uppercase + r'\[]~',
string.ascii_lowercase + r'|{}^')
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def toLower(s):
"""Returns the string s lowered according to IRC case rules."""
return s.translate(_lowertrans)
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def nickEqual(nick1, nick2):
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"""Returns True if nick1 == nick2 according to IRC case rules."""
return toLower(nick1) == toLower(nick2)
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_nickchars = r'_[]\`^{}|-'
_nickre = re.compile(r'^[A-Za-z%s][0-9A-Za-z%s]+$' % (re.escape(_nickchars),
re.escape(_nickchars)))
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def isNick(s):
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"""Returns True if s is a valid IRC nick."""
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if re.match(_nickre, s):
return True
else:
return False
def isChannel(s):
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"""Returns True if s is a valid IRC channel name."""
return (s and s[0] in '#&+!' and len(s) <= 50 and \
'\x07' not in s and ',' not in s and ' ' not in s)
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def hostmaskPatternEqual(pattern, hostmask):
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"""Returns True if hostmask matches the hostmask pattern pattern."""
return fnmatch.fnmatch(toLower(hostmask), toLower(pattern))
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_ipchars = string.digits + '.'
def isIP(s):
"""Not quite perfect, but close enough until I can find the regexp I want.
>>> isIP('255.255.255.255')
1
>>> isIP('abc.abc.abc.abc')
0
"""
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if s.translate(string.ascii, _ipchars) == '':
quads = s.split('.')
if len(quads) <= 4:
for quad in quads:
if int(quad) >= 256:
return False
return True
else:
return False
else:
return False
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def banmask(hostmask):
"""Returns a properly generic banning hostmask for a hostmask.
>>> banmask('nick!user@host.domain.tld')
'*!*@*.domain.tld'
>>> banmask('nick!user@10.0.0.1')
'*!*@10.0.0.*'
"""
host = hostFromHostmask(hostmask)
if isIP(host):
return ('*!*@%s.*' % host[:host.rfind('.')])
else:
return ('*!*@*%s' % host[host.find('.'):])
_argModes = 'ovhblkqe'
def separateModes(args):
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"""Separates modelines into single mode change tuples. Basically, you
should give it the .args of a MODE IrcMsg.
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Examples:
>>> separateModes(['+ooo', 'jemfinch', 'StoneTable', 'philmes'])
[('+o', 'jemfinch'), ('+o', 'StoneTable'), ('+o', 'philmes')]
>>> separateModes(['+o-o', 'jemfinch', 'PeterB'])
[('+o', 'jemfinch'), ('-o', 'PeterB')]
>>> separateModes(['+s-o', 'test'])
[('+s', None), ('-o', 'test')]
>>> separateModes(['+sntl', '100'])
[('+s', None), ('+n', None), ('+t', None), ('+l', '100')]
"""
modes = args[0]
assert modes[0] in '+-', 'Invalid args: %r' % args
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args = list(args[1:])
ret = []
index = 0
length = len(modes)
while index < length:
if modes[index] in '+-':
last = modes[index]
index += 1
else:
if modes[index] in _argModes:
ret.append((last + modes[index], args.pop(0)))
else:
ret.append((last + modes[index], None))
index += 1
return ret
def joinModes(modes):
"""Joins modes of the same form as returned by separateModes."""
args = []
modeChars = []
currentMode = '\x00'
for (mode, arg) in modes:
if arg is not None:
args.append(arg)
if not mode.startswith(currentMode):
currentMode = mode[0]
modeChars.append(mode[0])
modeChars.append(mode[1])
args.insert(0, ''.join(modeChars))
return args
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def bold(s):
"""Returns the string s, bolded."""
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return "\x02%s\x02" % s
mircColors = {
None: '',
'white': 0,
'black': 1,
'blue': 2,
'green': 3,
'red': 4,
'brown': 5,
'purple': 6,
'orange': 7,
'yellow': 8,
'light green': 9,
'teal': 10,
'light blue': 11,
'dark blue': 12,
'pink': 13,
'dark grey': 14,
'light grey': 15,
}
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# Offer a reverse mapping from integers to their associated colors.
for (k, v) in mircColors.items():
if k is not None: # Ignore empty string for None.
mircColors[v] = k
def mircColor(s, fg=None, bg=None):
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"""Returns s with the appropriate mIRC color codes applied."""
if fg is None and bg is None:
return s
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if fg is None or isinstance(fg, str):
fg = mircColors[fg]
if bg is None:
return '\x03%s%s\x03' % (fg, s)
else:
if isinstance(bg, str):
bg = mircColors[bg]
return '\x03%s,%s%s\x03' % (fg, bg, s)
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def canonicalColor(s, bg=False, shift=0):
h = hash(s) >> shift
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fg = h % 14 + 2 # The + 2 is to rule out black and white.
if bg:
bg = (h >> 4) & 3 # The 5th, 6th, and 7th least significant bits.
if fg < 8:
bg += 8
else:
bg += 2
return (fg, bg)
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else:
return (fg, None)
_unColorRe = re.compile('\x03(?:\\d+|\\d+,\\d+)?')
def unColor(s):
return _unColorRe.sub('', s)
def isValidArgument(s):
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"""Returns if s is strictly a valid argument for an IRC message."""
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return '\r' not in s and '\n' not in s and '\x00' not in s
notFunky = string.ascii[32:]+'\x02'+'\x03'
def safeArgument(s):
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"""If s is unsafe for IRC, returns a safe version."""
if isValidArgument(s) and s.translate(string.ascii, notFunky) == '':
return s
else:
return repr(s)
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def replyTo(msg):
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"""Returns the appropriate target to send responses to msg."""
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if isChannel(msg.args[0]):
return msg.args[0]
else:
return msg.nick
def privmsgPayload(L, sep, limit=425):
"""Returns a valid privmsg payload given a list of strings and a separator.
Items are popped from the back of the list until the payload is small
enough to fit into a single PRIVMSG payload.
"""
shrinkList(L, sep, limit)
return sep.join(L)
def shrinkList(L, sep='', limit=425):
"""Shrinks a list of strings to a given combined length of limit."""
length = len(sep)
while reduce(operator.add, map(length.__add__, map(len, L)), 0)> limit:
L.pop()
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class nick(str):
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"""This class does case-insensitive comparison and hashing of nicks."""
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def __init__(self, s):
self.original = s
self.lowered = toLower(s)
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def __repr__(self):
return repr(self.original)
def __str__(self):
return str(self.original)
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def __eq__(self, s):
try:
return toLower(s) == self.lowered
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except:
return False
def __hash__(self):
return hash(self.lowered)
class IrcDict(dict):
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"""Subclass of dict to make key comparison IRC-case insensitive."""
def __contains__(self, s):
return dict.__contains__(self, toLower(s))
has_key = __contains__
def __setitem__(self, s, v):
dict.__setitem__(self, toLower(s), v)
def __getitem__(self, s):
return dict.__getitem__(self, toLower(s))
def __delitem__(self, s):
dict.__delitem__(self, toLower(s))
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if __name__ == '__main__':
import sys, doctest
doctest.testmod(sys.modules['__main__'])
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: