21dbbc3f0b
This is due to Python <3.6 having "unsorted" dicts. Dicts are inherently unsorted, but starting from Python 3.6 they keep the order in which the keys are inserted (useful for unpacking)
144 lines
4.8 KiB
Python
144 lines
4.8 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 collections import OrderedDict
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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"({d})([\w\W]*?)\1|\[([^[]+?)\]\(([^(]+?)\)".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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message = utils.add_surrogates(message).strip()
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entities = []
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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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style, body, text, url = match.groups()
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if 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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# TODO: OrderedDict to be removed in Python3.6
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return OrderedDict([
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("message", utils.remove_surrogates(message)),
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("entities", entities)
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])
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def unparse(self, message: str, entities: list):
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message = utils.add_surrogates(message).strip()
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offset = 0
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for entity in entities:
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start = entity.offset + offset
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type = entity.type
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url = entity.url
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user = entity.user
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sub = message[start: start + entity.length]
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if type == "bold":
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style = self.BOLD_DELIMITER
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elif type == "italic":
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style = self.ITALIC_DELIMITER
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elif type == "code":
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style = self.CODE_DELIMITER
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elif type == "pre":
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style = self.PRE_DELIMITER
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elif type == "text_link":
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offset += 4 + len(url)
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message = message[:start] + message[start:].replace(
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sub, "[{}]({})".format(sub, url), 1)
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continue
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elif type == "text_mention":
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offset += 17 + len(str(user.id))
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message = message[:start] + message[start:].replace(
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sub, "[{}](tg://user?id={})".format(sub, user.id), 1)
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continue
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else:
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continue
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offset += len(style) * 2
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message = message[:start] + message[start:].replace(
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sub, "{0}{1}{0}".format(style, sub), 1)
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return utils.remove_surrogates(message)
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