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148 lines (127 loc) · 5.09 KB
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# Pyrogram - Telegram MTProto API Client Library for Python
# Copyright (C) 2017-2019 Dan Tès <https://github.com/delivrance>
#
# This file is part of Pyrogram.
#
# Pyrogram is free software: you can redistribute it and/or modify
# it under the terms of the GNU Lesser General Public License as published
# by the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Pyrogram is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public License
# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
import re
from collections import OrderedDict
import pyrogram
from pyrogram.api.types import (
MessageEntityBold as Bold,
MessageEntityItalic as Italic,
MessageEntityCode as Code,
MessageEntityTextUrl as Url,
MessageEntityPre as Pre,
MessageEntityMentionName as MentionInvalid,
InputMessageEntityMentionName as Mention
)
from pyrogram.errors import PeerIdInvalid
from . import utils
class Markdown:
BOLD_DELIMITER = "**"
ITALIC_DELIMITER = "__"
CODE_DELIMITER = "`"
PRE_DELIMITER = "```"
MARKDOWN_RE = re.compile(r"({d})([\w\W]*?)\1|\[([^[]+?)\]\(([^(]+?)\)".format(
d="|".join(
["".join(i) for i in [
["\{}".format(j) for j in i]
for i in [
PRE_DELIMITER,
CODE_DELIMITER,
ITALIC_DELIMITER,
BOLD_DELIMITER
]
]]
)
))
MENTION_RE = re.compile(r"tg://user\?id=(\d+)")
def __init__(self, client: "pyrogram.BaseClient" = None):
self.client = client
def parse(self, message: str):
message = utils.add_surrogates(str(message or "")).strip()
entities = []
offset = 0
for match in self.MARKDOWN_RE.finditer(message):
start = match.start() - offset
style, body, text, url = match.groups()
if url:
mention = self.MENTION_RE.match(url)
if mention:
user_id = int(mention.group(1))
try:
input_user = self.client.resolve_peer(user_id)
except PeerIdInvalid:
input_user = None
entity = (
Mention(offset=start, length=len(text), user_id=input_user)
if input_user else MentionInvalid(offset=start, length=len(text), user_id=user_id)
)
else:
entity = Url(offset=start, length=len(text), url=url)
body = text
offset += len(url) + 4
else:
if style == self.BOLD_DELIMITER:
entity = Bold(offset=start, length=len(body))
elif style == self.ITALIC_DELIMITER:
entity = Italic(offset=start, length=len(body))
elif style == self.CODE_DELIMITER:
entity = Code(offset=start, length=len(body))
elif style == self.PRE_DELIMITER:
entity = Pre(offset=start, length=len(body), language="")
else:
continue
offset += len(style) * 2
entities.append(entity)
message = message.replace(match.group(), body)
# TODO: OrderedDict to be removed in Python3.6
return OrderedDict([
("message", utils.remove_surrogates(message)),
("entities", entities)
])
def unparse(self, message: str, entities: list):
message = utils.add_surrogates(message).strip()
offset = 0
for entity in entities:
start = entity.offset + offset
type = entity.type
url = entity.url
user = entity.user
sub = message[start: start + entity.length]
if type == "bold":
style = self.BOLD_DELIMITER
elif type == "italic":
style = self.ITALIC_DELIMITER
elif type == "code":
style = self.CODE_DELIMITER
elif type == "pre":
style = self.PRE_DELIMITER
elif type == "text_link":
offset += 4 + len(url)
message = message[:start] + message[start:].replace(
sub, "[{}]({})".format(sub, url), 1)
continue
elif type == "text_mention":
offset += 17 + len(str(user.id))
message = message[:start] + message[start:].replace(
sub, "[{}](tg://user?id={})".format(sub, user.id), 1)
continue
else:
continue
offset += len(style) * 2
message = message[:start] + message[start:].replace(
sub, "{0}{1}{0}".format(style, sub), 1)
return utils.remove_surrogates(message)