[plesk] Refactor script (#241)

Make the script more readable, mostly by:

- using the Product class,
- removing the use of functions when unnecessary,
- a little bit of renaming and documentation.

src/plesk.py

@@ -3,39 +3,27 @@ from common import http
 from common import dates
 from common import endoflife
 
-URL = "https://docs.plesk.com/release-notes/obsidian/change-log"
-PRODUCT = "plesk"
+"""Fetches versions from Plesk's change log.
 
+Only 18.0.20.3 and later will be picked up, as the format of the change log for 18.0.20 and 18.0.19 are different and
+there is no entry for GA of version 18.0.18 and older."""
 
-def make_bs_request(url):
-    response = http.fetch_url(url)
-    return BeautifulSoup(response.text, features="html5lib")
+product = endoflife.Product("plesk")
+print(f"::group::{product.name}")
+response = http.fetch_url("https://docs.plesk.com/release-notes/obsidian/change-log")
+soup =  BeautifulSoup(response.text, features="html5lib")
 
+for release in soup.find_all("div", class_="changelog-entry--obsidian"):
+    version = release.h2.text.strip()
+    if not version.startswith('Plesk Obsidian 18'):
+        continue
 
-# Only 18.0.20.3 and later will be picked up :
-# - format of the title for 18.0.20 and 18.0.19 are different,
-# - there is not entry for GA of version 18.0.18 and older.
-def fetch_releases():
-    result = {}
+    version = version.replace(' Update ', '.').replace('Plesk Obsidian ', '')
+    if ' ' in version:
+        continue
 
-    soup = make_bs_request(URL)
-    releases = soup.find_all("div", class_="changelog-entry--obsidian")
-    for release in releases:
-        version = release.h2.text.strip()
-        if not version.startswith('Plesk Obsidian 18'):
-            continue
+    date = dates.parse_date(release.p.text)
+    product.declare_version(version, date)
 
-        version = version.replace(' Update ', '.').replace('Plesk Obsidian ', '')
-        if ' ' in version:
-            continue
-        date = dates.parse_date(release.p.text).strftime("%Y-%m-%d")
-        result[version] = date
-        print(f"{version}: {date}")
-
-    return result
-
-
-print(f"::group::{PRODUCT}")
-versions = fetch_releases()
-endoflife.write_releases(PRODUCT, versions)
+product.write()
 print("::endgroup::")