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import json, string, re, typing
from src import utils
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+"~"
# 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:
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[IRCHostmask],
command: str, args: IRCArgs, has_arbitrary: bool):
self.tags = tags
self.prefix = prefix
self.command = command
self.args = args
self.has_arbitrary = has_arbitrary
MESSAGE_TAG_ESCAPED = [r"\:", r"\s", r"\\", r"\r", r"\n"]
MESSAGE_TAG_UNESCAPED = [";", " ", "\\", "\r", "\n"]
def message_tag_escape(s):
return _multi_replace(s, MESSAGE_TAG_UNESCAPED, MESSAGE_TAG_ESCAPED)
def message_tag_unescape(s):
return _multi_replace(s, MESSAGE_TAG_ESCAPED, MESSAGE_TAG_UNESCAPED)
def parse_line(line: str) -> IRCLine:
tags = {}
prefix = None # type: typing.Optional[IRCHostmask]
command = None
if line[0] == "@":
tags_prefix, line = line[1:].split(" ", 1)
if tags_prefix[0] == "{":
tags_prefix = message_tag_unescape(tags_prefix)
tags = json.loads(tags_prefix)
else:
for tag in filter(None, tags_prefix.split(";")):
tag, sep, value = tag.partition("=")
if sep:
tags[tag] = message_tag_unescape(value)
else:
tags[tag] = None
line, arb_sep, arbitrary_split = line.partition(" :")
has_arbitrary = bool(arb_sep)
arbitrary = None # type: typing.Optional[str]
if has_arbitrary:
arbitrary = arbitrary_split
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), has_arbitrary)
REGEX_COLOR = re.compile("%s(?:(\d{1,2})(?:,(\d{1,2}))?)?" % utils.consts.COLOR)
def color(s: str, foreground: utils.consts.IRCColor,
background: utils.consts.IRCColor=None) -> str:
foreground_s = str(foreground.irc).zfill(2)
background_s = ""
if background:
background_s = ",%s" % str(background.irc).zfill(2)
return "%s%s%s%s%s" % (utils.consts.COLOR, foreground_s, background_s, s,
utils.consts.COLOR)
def bold(s: str) -> str:
return "%s%s%s" % (utils.consts.BOLD, s, utils.consts.BOLD)
def underline(s: str) -> str:
return "%s%s%s" % (utils.consts.UNDERLINE, s, utils.consts.UNDERLINE)
def strip_font(s: str) -> str:
s = s.replace(utils.consts.BOLD, "")
s = s.replace(utils.consts.ITALIC, "")
s = REGEX_COLOR.sub("", s)
s = s.replace(utils.consts.COLOR, "")
return s
FORMAT_TOKENS = [
utils.consts.BOLD,
utils.consts.RESET
]
def _color_tokens(s: str) -> typing.List[str]:
is_color = False
foreground = ""
background = ""
is_background = False
matches = [] # type: typing.List[str]
for char in s:
if is_color:
can_add = char.isdigit()
if can_add:
current_color = background if is_background else foreground
if current_color:
can_add = int(current_color + char) <= 15
if can_add:
if is_background:
background += char
else:
foreground += char
continue
elif char == "," and not is_background:
is_background = True
continue
else:
color = foreground
if background:
color += ","+background
matches.append("\x03%s" % color)
is_color = False
foreground = ""
background = ""
is_background = False
if char == utils.consts.COLOR:
if is_color:
matches.append(char)
else:
is_color = True
elif char in FORMAT_TOKENS:
matches.append(char)
return matches
def _color_match(code: typing.Optional[str], foreground: bool) -> str:
if not code:
return ""
color = utils.consts.COLOR_CODES[int(code)]
if foreground:
return str(color.ansi)
else:
return str(color.ansi_background())
def to_ansi_colors(s: str) -> str:
has_foreground = False
has_background = False
bold = False
for token in _color_tokens(s):
replace = ""
type = token[0]
if type == utils.consts.COLOR:
match = REGEX_COLOR.match(token)
if match and (match.group(1) or match.group(2)):
foreground = _color_match(match.group(1), True)
background = _color_match(match.group(2), False)
if foreground:
has_foreground = True
replace += utils.consts.ANSI_FORMAT % foreground
if background:
has_background = True
replace += utils.consts.ANSI_FORMAT % background
else:
if has_foreground:
has_foreground = False
replace += utils.consts.ANSI_FOREGROUND_RESET
if has_background:
has_background = False
replace += utils.consts.ANSI_BACKGROUND_RESET
elif type == utils.consts.BOLD:
if bold:
replace += utils.consts.ANSI_BOLD_RESET
else:
replace += utils.consts.ANSI_BOLD
bold = not bold
elif type == utils.consts.RESET:
replace += utils.consts.ANSI_RESET
s = s.replace(token, replace, 1)
return s + utils.consts.ANSI_RESET
OPT_STR = typing.Optional[str]
class IRCConnectionParameters(object):
def __init__(self, id: int, alias: OPT_STR, hostname: str, port: int,
password: OPT_STR, tls: bool, ipv4: bool, bindhost: OPT_STR,
nickname: str, username: OPT_STR, realname: OPT_STR,
args: typing.Dict[str, str]={}):
self.id = id
self.alias = alias
self.hostname = hostname
self.port = port
self.tls = tls
self.ipv4 = ipv4
self.bindhost = bindhost
self.password = password
self.nickname = nickname
self.username = username
self.realname = realname
self.args = args
class CTCPMessage(object):
def __init__(self, command: str, message: str):
self.command = command
self.message = message
def parse_ctcp(s: str) -> typing.Optional[CTCPMessage]:
ctcp = s.startswith("\x01")
if s.startswith("\x01"):
ctcp_command, sep, ctcp_message = s[1:].partition(" ")
if ctcp_message.endswith("\x01"):
ctcp_message = ctcp_message[:-1]
return CTCPMessage(ctcp_command, ctcp_message)
return None
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