69 lines
2.0 KiB
Python
69 lines
2.0 KiB
Python
from functools import lru_cache
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from bs4 import BeautifulSoup
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@lru_cache(maxsize=2048)
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def convert_html_to_md(html: str) -> str:
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"""Convert HTML to Markdown.
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Discord supports:
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- Bold with **text**
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- Italic with *text*
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- Blockquote with >>> text
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- Code with `text`
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- Fence code with ```text```
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- Links with [text](url)
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- Syntax highlighting with ```language
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- Strikethrough with ~~text~~
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"""
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soup: BeautifulSoup = BeautifulSoup(html, features="lxml")
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# Bold
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for bold in soup.find_all("b") + soup.find_all("strong"):
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bold.replace_with(f"**{bold.text}**")
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# Italic
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for italic in soup.find_all("i") + soup.find_all("em"):
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italic.replace_with(f"*{italic.text}*")
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# Blockquote
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for blockquote in soup.find_all("blockquote") + soup.find_all("q"):
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blockquote.replace_with(f">>> {blockquote.text}")
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# Code
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for code in soup.find_all("code") + soup.find_all("pre"):
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code.replace_with(f"`{code.text}`")
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# Links
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for link in soup.find_all("a") + soup.find_all("link"):
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link_text = link.text or link.get("href") or "Link"
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link.replace_with(f"[{link_text}]({link.get('href')})")
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# Strikethrough
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for strikethrough in soup.find_all("s") + soup.find_all("del") + soup.find_all("strike"):
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strikethrough.replace_with(f"~~{strikethrough.text}~~")
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# <br> tags
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for br in soup.find_all("br"):
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br.replace_with("\n")
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# Remove all other tags
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for tag in soup.find_all(True):
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tag.replace_with(tag.text)
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# Remove all leading and trailing whitespace
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soup_text = soup.text
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return soup_text.strip()
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# Test the function
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if __name__ == "__main__":
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html: str = """
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<p><b>bold</b> <i>italic</i> <a href="https://example.com">link</a> <code>code</code> <s>strikethrough</s></p>
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<blockquote>blockquote</blockquote>
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<pre><code>pre code</code></pre>
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<strong>strong</strong>
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"""
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print(convert_html_to_md(html))
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