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# Copyright (c) 2022 Tulir Asokan
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
import commonmark
class HtmlEscapingRenderer(commonmark.HtmlRenderer):
def __init__(self, allow_html: bool = False):
super().__init__()
self.allow_html = allow_html
def lit(self, s):
if self.allow_html:
return super().lit(s)
return super().lit(s.replace("<", "<").replace(">", ">"))
def image(self, node, entering):
prev = self.allow_html
self.allow_html = True
super().image(node, entering)
self.allow_html = prev
md_parser = commonmark.Parser()
yes_html_renderer = commonmark.HtmlRenderer()
no_html_renderer = HtmlEscapingRenderer()
def render(message: str, allow_html: bool = False) -> str:
parsed = md_parser.parse(message)
if allow_html:
return yes_html_renderer.render(parsed)
else:
return no_html_renderer.render(parsed)
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