notifier: adding basic oncall notifications

.github/actions/pr_notifier/pr_notifier.py

@@ -17,7 +17,9 @@
 import os
 import sys
 
+import requests
 import github
+import icalendar
 from slack_sdk import WebClient
 from slack_sdk.errors import SlackApiError
 
@@ -226,10 +228,33 @@ def post_to_oncall(client, unassigned_prs, out_slo_prs):
             text=(
                 "*Untriaged Issues* (please tag and cc area experts)\n<%s|%s>" %
                 (issue_link, issue_link)))
+        # On Monday, post the new oncall.
+        if datetime.date.today().weekday() == 0:
+            oncall = parse_calendar()
+            client.chat_postMessage(channel='#envoy-maintainer-oncall', text=(oncall))
+            client.chat_postMessage(channel='#general', text=(oncall))
     except SlackApiError as e:
         print("Unexpected error %s", e.response["error"])
 
 
+def parse_calendar():
+    e = requests.get(
+        "https://calendar.google.com/calendar/ical/d6glc0l5rc3v235q9l2j29dgovh3dn48%40import.calendar.google.com/public/basic.ics"
+    )
+    ecal = icalendar.Calendar.from_ical(e.text)
+
+    now = datetime.datetime.now()
+    sunday = now - datetime.timedelta(days=now.weekday() + 1)
+
+    for component in ecal.walk():
+        if component.name == "VEVENT":
+            if (sunday.date() == component.decoded("dtstart").date()):
+                e.close()
+                return component.get("summary")
+    e.close()
+    return "unable to find this week's oncall"
+
+
 if __name__ == '__main__':
     parser = argparse.ArgumentParser()
     parser.add_argument(

.github/actions/pr_notifier/requirements.in

@@ -1,2 +1,4 @@
 pygithub
 slack_sdk
+requests
+icalendar

.github/actions/pr_notifier/requirements.txt

@@ -167,6 +167,9 @@ deprecated==1.2.13 \
     --hash=sha256:43ac5335da90c31c24ba028af536a91d41d53f9e6901ddb021bcc572ce44e38d \
     --hash=sha256:64756e3e14c8c5eea9795d93c524551432a0be75629f8f29e67ab8caf076c76d
     # via pygithub
+icalendar==5.0.10 \
+    --hash=sha256:34f0ca020b804758ddf316eb70d1d46f769bce64638d5a080cb65dd46cfee642 \
+    --hash=sha256:6e392c2f301b6b5f49433e14c905db3de444b12876f3345f1856a75e9cd8be6f
 idna==2.10 \
     --hash=sha256:b307872f855b18632ce0c21c5e45be78c0ea7ae4c15c828c20788b26921eb3f6 \
     --hash=sha256:b97d804b1e9b523befed77c48dacec60e6dcb0b5391d57af6a65a312a90648c0
@@ -203,18 +206,28 @@ pynacl==1.4.0 \
     --hash=sha256:ea6841bc3a76fa4942ce00f3bda7d436fda21e2d91602b9e21b7ca9ecab8f3ff \
     --hash=sha256:f8851ab9041756003119368c1e6cd0b9c631f46d686b3904b18c0139f4419f80
     # via pygithub
+python-dateutil==2.8.2 \
+    --hash=sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86 \
+    --hash=sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9
+    # via icalendar
+pytz==2023.3.post1 \
+    --hash=sha256:7b4fddbeb94a1eba4b557da24f19fdf9db575192544270a9101d8509f9f43d7b \
+    --hash=sha256:ce42d816b81b68506614c11e8937d3aa9e41007ceb50bfdcb0749b921bf646c7
+    # via icalendar
 requests==2.31.0 \
     --hash=sha256:58cd2187c01e70e6e26505bca751777aa9f2ee0b7f4300988b709f44e013003f \
     --hash=sha256:942c5a758f98d790eaed1a29cb6eefc7ffb0d1cf7af05c3d2791656dbd6ad1e1
     # via pygithub
 six==1.16.0 \
     --hash=sha256:1e61c37477a1626458e36f7b1d82aa5c9b094fa4802892072e49de9c60c4c926 \
     --hash=sha256:8abb2f1d86890a2dfb989f9a77cfcfd3e47c2a354b01111771326f8aa26e0254
-    # via pynacl
+    # via
+    #   pynacl
+    #   python-dateutil
 slack-sdk==3.22.0 \
     --hash=sha256:6eacce0fa4f8cfb4d84eac0d7d7e1b1926040a2df654ae86b94179bdf2bc4d8c \
     --hash=sha256:f102a4902115dff3b97c3e8883ad4e22d54732221886fc5ef29bfc290f063b4a
-    # via -r requirements.in
+# via -r requirements.in
 urllib3==1.26.6 \
     --hash=sha256:39fb8672126159acb139a7718dd10806104dec1e2f0f6c88aab05d17df10c8d4 \
     --hash=sha256:f57b4c16c62fa2760b7e3d97c35b255512fb6b59a259730f36ba32ce9f8e342f