commit 2060d2b4b5301ff06f0225d4636ceb641b9b7573
Author: Midgard <midgard@zeus.ugent.be>
Date:   Wed Feb 24 23:27:17 2021 +0100

    Initial commit

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..09f0109
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,4 @@
+venv/
+__pycache__/
+.idea/
+.mypy_cache/
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..e69de29
diff --git a/mattermost_bot.py b/mattermost_bot.py
new file mode 100755
index 0000000..ff1525d
--- /dev/null
+++ b/mattermost_bot.py
@@ -0,0 +1,73 @@
+#!/usr/bin/env python3
+
+import os
+import datetime
+from time import sleep
+import requests
+import astral
+from astral.sun import sun
+
+CHANNEL = os.environ["SUNBOT_ANNOUNCE_CHANNEL"]
+AUTHORIZATION = "Bearer " + os.environ["SUNBOT_ANNOUNCE_MATTERMOST_TOKEN"]
+URL = os.environ["SUNBOT_ANNOUNCE_MATTERMOST_API_ENDPOINT"] + "/posts"
+
+GHENT = astral.LocationInfo("Gent", "Belgium", "Europe/Brussels", 51.05, 3.72)
+
+def post(message):
+	payload = {
+		"channel_id": CHANNEL,
+		"message": message
+	}
+	print("Posting " + str(payload), flush=True)
+	requests.post(URL, json=payload, headers={"Authorization": AUTHORIZATION})
+
+
+def format_in(diff):
+	total_minutes = round(diff.total_seconds() / 60)
+	hours, minutes = divmod(total_minutes, 60)
+	return "{}h{}".format(hours, minutes)
+
+
+def wait_until(t, now):
+	seconds = (t - now).total_seconds()
+	print("Waiting {} seconds until {}".format(seconds, t), flush=True)
+	sleep(seconds)
+
+
+def announce_sunrise(today):
+	print("Announcing sunrise", flush=True)
+	now = datetime.datetime.now(GHENT.tzinfo)
+	post(":sunrise: De zon komt op in Gent!\nZonnemiddag om {} (binnen {})\nZonsondergang om {} (binnen {})".format(
+		tomorrow["noon"],
+		format_in(now - tomorrow["noon"]),
+		tomorrow["sunset"],
+		format_in(now - tomorrow["sunset"]),
+	))
+
+def announce_sunset(tomorrow):
+	print("Announcing sunset", flush=True)
+	now = datetime.datetime.now(GHENT.tzinfo)
+	post(":sunset: De zon gaat onder in Gent!\nZonsopkomst om {} (binnen {})".format(
+		tomorrow["sunrise"],
+		format_in(now - tomorrow["sunrise"]),
+	))
+
+
+if __name__ == "__main__":
+	print("Starting Sunbot", flush=True)
+	while True:
+		today = sun(GHENT.observer, date=datetime.date.today())
+		tomorrow = sun(GHENT.observer, date=datetime.date.today() + datetime.timedelta(days=1))
+		now = datetime.datetime.now(GHENT.tzinfo)
+
+		if now >= today["sunset"]:
+			wait_until(tomorrow["sunrise"], now)
+			announce_sunrise(tomorrow)
+
+		elif now >= today["sunrise"]:
+			wait_until(today["sunset"], now)
+			announce_sunset(tomorrow)
+
+		else:
+			wait_until(today["sunrise"], now)
+			announce_sunrise(today)
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..b89d9b1
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,6 @@
+astral==2.2
+certifi==2020.12.5
+chardet==4.0.0
+idna==2.10
+requests==2.25.1
+urllib3==1.26.3