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import string, re, typing
ASCII_UPPER = string.ascii_uppercase
ASCII_LOWER = string.ascii_lowercase
STRICT_RFC1459_UPPER = ASCII_UPPER+r'\[]'
STRICT_RFC1459_LOWER = ASCII_LOWER+r'|{}'
RFC1459_UPPER = STRICT_RFC1459_UPPER+"^"
RFC1459_LOWER = STRICT_RFC1459_LOWER+"~"
def remove_colon(s: str) -> str:
if s.startswith(":"):
s = s[1:]
return s
MULTI_REPLACE_ITERABLE = typing.Iterable[str]
# case mapping lowercase/uppcase logic
def _multi_replace(s: str,
chars1: typing.Iterable[str],
chars2: typing.Iterable[str]) -> str:
for char1, char2 in zip(chars1, chars2):
s = s.replace(char1, char2)
return s
def lower(case_mapping: str, s: str) -> str:
if case_mapping == "ascii":
return _multi_replace(s, ASCII_UPPER, ASCII_LOWER)
elif case_mapping == "rfc1459":
return _multi_replace(s, RFC1459_UPPER, RFC1459_LOWER)
elif case_mapping == "strict-rfc1459":
return _multi_replace(s, STRICT_RFC1459_UPPER, STRICT_RFC1459_LOWER)
else:
raise ValueError("unknown casemapping '%s'" % case_mapping)
# compare a string while respecting case mapping
def equals(case_mapping: str, s1: str, s2: str) -> bool:
return lower(case_mapping, s1) == lower(case_mapping, s2)
class IRCHostmask(object):
def __init__(self, nickname: str, username: str, hostname: str,
hostmask: str):
self.nickname = nickname
self.username = username
self.hostname = hostname
self.hostmask = hostmask
def __repr__(self):
return "IRCHostmask(%s)" % self.__str__()
def __str__(self):
return self.hostmask
def seperate_hostmask(hostmask: str) -> IRCHostmask:
hostmask = remove_colon(hostmask)
nickname, _, username = hostmask.partition("!")
username, _, hostname = username.partition("@")
return IRCHostmask(nickname, username, hostname, hostmask)
class IRCArgs(object):
def __init__(self, args: typing.List[str]):
self._args = args
def get(self, index: int) -> typing.Optional[str]:
if len(self._args) > index:
return self._args[index]
return None
def __repr__(self):
return "IRCArgs(%s)" % self._args
def __len__(self) -> int:
return len(self._args)
def __getitem__(self, index) -> str:
return self._args[index]
class IRCLine(object):
def __init__(self, tags: dict, prefix: typing.Optional[str], command: str,
args: IRCArgs):
self.tags = tags
self.prefix = prefix
self.command = command
self.args = args
def parse_line(line: str) -> IRCLine:
tags = {}
prefix = typing.Optional[IRCHostmask]
command = None
if line[0] == "@":
if line[1] == "{":
tags = json.loads(line[2:])
else:
tags_prefix, line = line[1:].split(" ", 1)
for tag in filter(None, tags_prefix.split(";")):
tag, sep, value = tag.partition("=")
if sep:
tags[tag] = value
else:
tags[tag] = None
line, _, arbitrary_split = line.partition(" :")
arbitrary = arbitrary_split or None
if line[0] == ":":
prefix_str, line = line[1:].split(" ", 1)
prefix = seperate_hostmask(prefix_str)
args = []
command, sep, line = line.partition(" ")
if sep:
args = line.split(" ")
if arbitrary:
args.append(arbitrary)
return IRCLine(tags, prefix, command, IRCArgs(args))
COLOR_WHITE, COLOR_BLACK, COLOR_BLUE, COLOR_GREEN = 0, 1, 2, 3
COLOR_RED, COLOR_BROWN, COLOR_PURPLE, COLOR_ORANGE = 4, 5, 6, 7
COLOR_YELLOW, COLOR_LIGHTGREEN, COLOR_CYAN, COLOR_LIGHTCYAN = (8, 9,
10, 11)
COLOR_LIGHTBLUE, COLOR_PINK, COLOR_GREY, COLOR_LIGHTGREY = (12, 13,
14, 15)
FONT_BOLD, FONT_ITALIC, FONT_UNDERLINE, FONT_INVERT = ("\x02", "\x1D",
"\x1F", "\x16")
FONT_COLOR, FONT_RESET = "\x03", "\x0F"
REGEX_COLOR = re.compile("%s\d\d(?:,\d\d)?" % FONT_COLOR)
def color(s: str, foreground: int, background: int=None) -> str:
foreground = str(foreground).zfill(2)
if background:
background = str(background).zfill(2)
return "%s%s%s%s%s" % (FONT_COLOR, foreground,
"" if not background else ",%s" % background, s, FONT_COLOR)
def bold(s: str) -> str:
return "%s%s%s" % (FONT_BOLD, s, FONT_BOLD)
def underline(s: str) -> str:
return "%s%s%s" % (FONT_UNDERLINE, s, FONT_UNDERLINE)
def strip_font(s: str) -> str:
s = s.replace(FONT_BOLD, "")
s = s.replace(FONT_ITALIC, "")
s = REGEX_COLOR.sub("", s)
s = s.replace(FONT_COLOR, "")
return s
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