[oracle-jdk] Refactor script (#237)

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/oracle-jdk.py

@@ -1,46 +1,26 @@
 from requests_html import HTMLSession
+from common import dates
 from common import endoflife
 
-"""Fetch Java versions with their dates from https://www.java.com/releases/.
+"""Fetch Java versions from https://www.java.com/releases/.
 
-This script is using requests-html (https://requests-html.kennethreitz.org/)
-because https://www.java.com/releases/ needs JavaScript to render correctly.
+This script is using requests-html because the page needs JavaScript to render correctly."""
 
-requests-html is using pyppeteer internally for executing javascript. And
-pyppeteer is relying on Chromium, which is automatically downloaded  in
-~/.local/share/pyppeteer by the library. This path can be overridden by
-declaring a PYPPETEER_HOME environment variable. Unfortunately exporting this
-variable in the python script does not work, so it has to be done before this
-script execution.
-"""
+product = endoflife.Product("oracle-jdk")
+print(f"::group::{product.name}")
+r = HTMLSession().get('https://www.java.com/releases/')
+r.html.render(sleep=1, scrolldown=3)
 
-PRODUCT = "oracle-jdk"
-URL = "https://www.java.com/releases/"
+previous_date = None
+for row in r.html.find('#released tr'):
+    version_cell = row.find('td.anchor', first=True)
+    if version_cell:
+        version = version_cell.attrs['id']
+        date_str = row.find('td')[1].text
+        date = dates.parse_date(date_str) if date_str else previous_date
+        product.declare_version(version, date)
+        previous_date = date
 
-
-def fetch_releases():
-    session = HTMLSession()
-    r = session.get('https://www.java.com/releases/')
-    r.html.render(sleep=1, scrolldown=3)
-
-    releases = {}
-    previous_date = None
-    for row in r.html.find('#released tr'):
-        version_cell = row.find('td.anchor', first=True)
-
-        if version_cell:
-            version = version_cell.attrs['id']
-            date = row.find('td')[1].text
-            date = previous_date if not date else date
-            print(f"{version}: {date}")
-            releases[version] = date
-            previous_date = date
-
-    return releases
-
-
-print(f"::group::{PRODUCT}")
-all_versions = fetch_releases()
-all_versions.pop('1.0_alpha')  # only version we don't want, regex not needed
-endoflife.write_releases(PRODUCT, all_versions)
+product.remove_version('1.0_alpha')  # the only version we don't want, a regex is not needed
+product.write()
 print("::endgroup::")