working.py

import re
import mf

def summarize_github_profile(user):
    name = mf.get(f"https://github.com/{user}").card["name"]
    return f"GitHub profile for {name}"

url_summary_templates = [
    (
        r"https://github.com/(?P<user>\w+)/(?P<project>[\w-]+)/pulls/(?P<pull>\d+)",
        "A comment on a pull request in the {project} GitHub repository",
    ),
    (
        r"https://github.com/(?P<user>\w+)",
        summarize_github_profile,
    ),
]

def get_summary(url: str):
    """
    Return a text summary for given `url`.
    
    >>> get_summary("https://github.com/capjamesg/indieweb-utils/pulls/1")
    'A comment on a pull request in the indieweb-utils GitHub repository'
    
    """
    for pattern, summary in url_summary_templates:
        if match := re.match(pattern, url):
            matches = match.groupdict()
            try:
                return summary(**matches)
            except TypeError:
                return summary.format(**matches)