[rhel] Refactor script (#245)

Make the script more readable, mostly by:

- using the Product class,
- a little bit of renaming and documentation.

src/rhel.py

@@ -1,30 +1,30 @@
 import re
 from bs4 import BeautifulSoup
-from common import http
+from common import dates
 from common import endoflife
+from common import http
 
-URL = "https://access.redhat.com/articles/3078"
 # https://regex101.com/r/877ibq/1
-regex = r"RHEL (?P<major>\d)(\. ?(?P<minor>\d+))?(( Update (?P<minor2>\d))| GA)?"
+VERSION_PATTERN = re.compile(r"RHEL (?P<major>\d)(\. ?(?P<minor>\d+))?(( Update (?P<minor2>\d))| GA)?")
 
-print("::group::rhel")
-response = http.fetch_url(URL)
+product = endoflife.Product("redhat")
+print(f"::group::{product.name}")
+response = http.fetch_url("https://access.redhat.com/articles/3078")
 soup = BeautifulSoup(response.text, features="html5lib")
 
-versions = {}
 for tr in soup.findAll("tr"):
     td_list = tr.findAll("td")
-    if len(td_list) > 0:
-        version = td_list[0].get_text()
-        m = re.match(regex, version.strip()).groupdict()
-        version = m["major"]
-        if m["minor"]:
-            version += ".%s" % m["minor"]
-        if m["minor2"]:
-            version += ".%s" % m["minor2"]
-        date = td_list[1].get_text()
-        versions[version] = date
-        print(f"{version}: {date}")
+    if len(td_list) == 0:
+        continue
 
-endoflife.write_releases('redhat', versions)
+    version_str = td_list[0].get_text().strip()
+    version_match = VERSION_PATTERN.match(version_str).groupdict()
+    version = version_match["major"]
+    version += ("." + version_match["minor"]) if version_match["minor"] else ""
+    version += ("." + version_match["minor2"]) if version_match["minor2"] else ""
+    date = dates.parse_date(td_list[1].get_text())
+
+    product.declare_version(version, date)
+
+product.write()
 print("::endgroup::")