news feed test

src/pacroller/arch-news-feed.py

@@ -0,0 +1,35 @@
+import urllib.request
+from xml.etree import ElementTree as etree
+from typing import List
+
+def get_news(old_news: str) -> List[str]:
+    ARCH_RSS_URL = 'https://archlinux.org/feeds/news/'
+    headers = {'User-Agent': 'Mozilla/5.0 (compatible; Pacroller/0.1; +https://github.com/isjerryxiao/pacroller)'}
+    req = urllib.request.Request(ARCH_RSS_URL, data=None, headers=headers)
+    rss_text = urllib.request.urlopen(req).read().decode('utf-8')
+
+    xml_root = etree.fromstring(rss_text)
+    elements: List[etree.Element] = xml_root.findall('channel/item')
+
+    news: List[str] = list()
+    for elem in elements:
+        title = elem.findtext('title') or 'No title'
+        link = elem.findtext('link') or ''
+        date = elem.findtext('pubDate') or 'No date'
+        news.append(f"{date} | {title} ({link})".rstrip())
+    return news[:news.index(old_news)] if old_news in news else news
+
+if __name__ == '__main__':
+    from pathlib import Path
+    f = Path('/tmp/pacroller-news.db')
+    if f.exists():
+        old_news = f.read_text()
+    else:
+        old_news = None
+    news = get_news(old_news)
+    if news:
+        f.write_text(news[0])
+        for i in news:
+            print(i)
+    else:
+        print(f'nothing new, {old_news=}')