# openai_rss_reader_stdlib.py
# pip install feedparser

import feedparser
from email.utils import parsedate_to_datetime

FEEDS = [
    "https://platform.openai.com/docs/release-notes.rss",  # リリースノート
    "https://openai.com/blog/rss.xml",                     # ブログ
]

def to_ts(entry: feedparser.FeedParserDict):
    # published_parsed / updated_parsed があれば直接datetime化
    if entry.get("published_parsed"):
        return parsedate_to_datetime(entry.published)
    if entry.get("updated_parsed"):
        return parsedate_to_datetime(entry.updated)
    return None

def uniq_key(entry: feedparser.FeedParserDict):
    return entry.get("id") or entry.get("guid") or entry.get("link")

def fetch_all(feeds):
    items = []
    seen = set()
    for url in feeds:
        d: feedparser.FeedParserDict = feedparser.parse(url)
        for e in d.entries:
            k = uniq_key(e)
            if not k or k in seen:
                continue
            seen.add(k)
            ts = to_ts(e)
            items.append({
                "title": e.get("title", "(no title)"),
                "link": e.get("link"),
                "published": e.get("published") or e.get("updated"),
                "ts": ts,
                "source": url,
            })
    # ts が None のものは末尾に回す
    items.sort(key=lambda x: (x["ts"] is not None, x["ts"]), reverse=True)
    return items

if __name__ == "__main__":
    for i, it in enumerate(fetch_all(FEEDS), 1):
        print(f"{i:02d}. {it['title']}\n    {it['link']}\n    {it['published']}  [{it['source']}]\n")