Add event for Hacker News 'Who is Hiring?'

Closes: #78

agenda/data.py

@@ -24,6 +24,7 @@ from . import (
     economist,
     fx,
     gwr,
+    hn,
     meetup,
     stock_market,
     subscription,
@@ -261,6 +262,7 @@ async def get_data(now: datetime) -> typing.Mapping[str, str | object]:
     events += subscription.get_events(os.path.join(my_data, "subscriptions.yaml"))
     events += economist.publication_dates(last_week, next_year)
     events += meetup.get_events(my_data)
+    events += hn.whoishiring(last_year, next_year)
 
     events += domains.renewal_dates(my_data)
 

agenda/hn.py

@@ -0,0 +1,30 @@
+"""Hacker News: Who Is Hiring post."""
+
+from datetime import date, datetime, time, timedelta
+
+import pytz
+from dateutil.relativedelta import relativedelta
+
+from .types import Event
+
+eastern_time = pytz.timezone("America/New_York")
+
+
+def whoishiring(start_date: date, end_date: date) -> list[Event]:
+    """Who Is Hiring post."""
+    events: list[Event] = []
+    cur = start_date.replace(day=1)
+    t = time(11, 0)
+    while cur < end_date:
+        cur += relativedelta(months=1)
+        weekday = cur.weekday()
+        event_date = cur if 0 <= weekday <= 4 else cur + timedelta(days=7 - weekday)
+        events.append(
+            Event(
+                name="whoishiring",
+                date=eastern_time.localize(datetime.combine(event_date, t)),
+                url="https://news.ycombinator.com/submitted?id=whoishiring",
+            )
+        )
+
+    return events