108 lines
3.6 KiB
Python
108 lines
3.6 KiB
Python
# Pyrogram - Telegram MTProto API Client Library for Python
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# Copyright (C) 2017-2018 Dan Tès <https://github.com/delivrance>
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#
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# This file is part of Pyrogram.
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#
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# Pyrogram is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published
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# by the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# Pyrogram is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.
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import re
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from pyrogram.api.types import (
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MessageEntityBold as Bold,
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MessageEntityItalic as Italic,
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MessageEntityCode as Code,
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MessageEntityTextUrl as Url,
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MessageEntityPre as Pre,
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MessageEntityMentionName as MentionInvalid,
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InputMessageEntityMentionName as Mention
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)
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from . import utils
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class Markdown:
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BOLD_DELIMITER = "**"
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ITALIC_DELIMITER = "__"
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CODE_DELIMITER = "`"
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PRE_DELIMITER = "```"
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MARKDOWN_RE = re.compile(r"```([\w ]*)\n([\w\W]*)(?:\n|)```|\[([^[(]+)\]\(([^])]+)\)|({d})(.+?)\5".format(
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d="|".join(
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["".join(i) for i in [
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["\{}".format(j) for j in i]
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for i in [
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PRE_DELIMITER,
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CODE_DELIMITER,
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ITALIC_DELIMITER,
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BOLD_DELIMITER
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]
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]]
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)
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))
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MENTION_RE = re.compile(r"tg://user\?id=(\d+)")
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def __init__(self, peers_by_id: dict):
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self.peers_by_id = peers_by_id
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def parse(self, message: str):
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entities = []
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message = utils.add_surrogates(message).strip()
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offset = 0
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for match in self.MARKDOWN_RE.finditer(message):
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start = match.start() - offset
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lang, pre, text, url, style, body = match.groups()
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if pre:
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body = pre = pre.strip()
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entity = Pre(start, len(pre), lang.strip() or "")
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offset += len(lang) + len(self.PRE_DELIMITER) * 2
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elif url:
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mention = self.MENTION_RE.match(url)
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if mention:
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user_id = int(mention.group(1))
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input_user = self.peers_by_id.get(user_id, None)
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entity = (
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Mention(start, len(text), input_user)
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if input_user
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else MentionInvalid(start, len(text), user_id)
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)
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else:
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entity = Url(start, len(text), url)
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body = text
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offset += len(url) + 4
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else:
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if style == self.BOLD_DELIMITER:
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entity = Bold(start, len(body))
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elif style == self.ITALIC_DELIMITER:
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entity = Italic(start, len(body))
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elif style == self.CODE_DELIMITER:
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entity = Code(start, len(body))
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elif style == self.PRE_DELIMITER:
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entity = Pre(start, len(body), "")
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else:
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continue
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offset += len(style) * 2
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entities.append(entity)
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message = message.replace(match.group(), body)
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return dict(
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message=utils.remove_surrogates(message),
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entities=entities
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)
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