[unrealircd] Refactor script (#252)

Make the script more readable, mostly by:

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

src/unrealircd.py

@@ -1,24 +1,26 @@
 import mwparserfromhell
 import re
-from common import http
+from common import dates
 from common import endoflife
+from common import http
 
-URL = "https://www.unrealircd.org/docwiki/index.php?title=History_of_UnrealIRCd_releases&action=raw"
+DATE_PATTERN = re.compile(r"\d{4}-\d{2}-\d{2}")
 
-print("::group::unrealircd")
-response = http.fetch_url(URL)
+product = endoflife.Product("unrealircd")
+print(f"::group::{product.name}")
+response = http.fetch_url("https://www.unrealircd.org/docwiki/index.php?title=History_of_UnrealIRCd_releases&action=raw")
 wikicode = mwparserfromhell.parse(response.text)
 
-versions = {}
 for tr in wikicode.ifilter_tags(matches=lambda node: node.tag == "tr"):
     items = tr.contents.filter_tags(matches=lambda node: node.tag == "td")
-    if len(items) >= 2:
-        maybe_version = items[0].__strip__()
-        if re.match(endoflife.DEFAULT_VERSION_REGEX, maybe_version):
-            maybe_date = items[1].__strip__()
-            if re.match(r"\d{4}-\d{2}-\d{2}", maybe_date):
-                versions[maybe_version] = maybe_date
-                print(f"{maybe_version}: {maybe_date}")
+    if len(items) < 2:
+        continue
 
-endoflife.write_releases('unrealircd', versions)
+    version = items[0].__strip__()
+    date_str = items[1].__strip__()
+    if endoflife.DEFAULT_VERSION_PATTERN.match(version) and DATE_PATTERN.match(date_str):
+        date = dates.parse_date(date_str)
+        product.declare_version(version, date)
+
+product.write()
 print("::endgroup::")