cloudflare/GHC-Errbot
Publicmirrored fromhttps://github.com/cloudflare/GHC-Errbot
markdownconverter.py
53lines · modecode
| 1 | # MIT License |
| 2 | # |
| 3 | # Copyright (c) 2018 dr-BEat |
| 4 | # |
| 5 | # Permission is hereby granted, free of charge, to any person obtaining a copy |
| 6 | # of this software and associated documentation files (the "Software"), to deal |
| 7 | # in the Software without restriction, including without limitation the rights |
| 8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 9 | # copies of the Software, and to permit persons to whom the Software is |
| 10 | # furnished to do so, subject to the following conditions: |
| 11 | # |
| 12 | # The above copyright notice and this permission notice shall be included in all |
| 13 | # copies or substantial portions of the Software. |
| 14 | # |
| 15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 21 | # SOFTWARE. |
| 22 | |
| 23 | import re |
| 24 | from markdown import Markdown |
| 25 | from markdown.extensions.extra import ExtraExtension |
| 26 | from markdown.preprocessors import Preprocessor |
| 27 | from errbot.rendering.ansiext import AnsiExtension, enable_format, IMTEXT_CHRS |
| 28 | |
| 29 | MARKDOWN_LINK_REGEX = re.compile(r'(?<!!)\[(?P<text>[^\]]+?)\]\((?P<uri>[a-zA-Z0-9]+?:\S+?)\)') |
| 30 | |
| 31 | |
| 32 | def hangoutschat_markdown_converter(compact_output=False): |
| 33 | """ |
| 34 | This is a Markdown converter for use with HangoutsChat. |
| 35 | """ |
| 36 | enable_format('imtext', IMTEXT_CHRS, borders=not compact_output) |
| 37 | md = Markdown(output_format='imtext', extensions=[ExtraExtension(), AnsiExtension()]) |
| 38 | md.preprocessors['LinkPreProcessor'] = LinkPreProcessor(md) |
| 39 | md.stripTopLevelTags = False |
| 40 | return md |
| 41 | |
| 42 | |
| 43 | class LinkPreProcessor(Preprocessor): |
| 44 | """ |
| 45 | This preprocessor converts markdown URL notation into Hangouts Chat URL |
| 46 | notation as described at |
| 47 | https://developers.google.com/hangouts/chat/reference/message-formats/basic, |
| 48 | section "Linking to URLs". |
| 49 | """ |
| 50 | def run(self, lines): |
| 51 | for i, line in enumerate(lines): |
| 52 | lines[i] = MARKDOWN_LINK_REGEX.sub(r'<\2|\1>', line) |
| 53 | return lines |