From 22111e3608a5e13277a1cde1c2e3f4d6b2f1cf86 Mon Sep 17 00:00:00 2001
From: Someone <someone@somenet.org>
Date: Fri, 19 Jun 2020 01:32:13 +0200
Subject: [PATCH] [cron] ICS-calendars to Mattermost channel(s).

---
 ics_to_channel/.gitignore        |  1 +
 ics_to_channel/config.py.example | 16 ++++++++
 ics_to_channel/main.py           | 64 ++++++++++++++++++++++++++++++++
 3 files changed, 81 insertions(+)
 create mode 100644 ics_to_channel/.gitignore
 create mode 100644 ics_to_channel/config.py.example
 create mode 100755 ics_to_channel/main.py

diff --git a/ics_to_channel/.gitignore b/ics_to_channel/.gitignore
new file mode 100644
index 0000000..4acd06b
--- /dev/null
+++ b/ics_to_channel/.gitignore
@@ -0,0 +1 @@
+config.py
diff --git a/ics_to_channel/config.py.example b/ics_to_channel/config.py.example
new file mode 100644
index 0000000..04fd0f7
--- /dev/null
+++ b/ics_to_channel/config.py.example
@@ -0,0 +1,16 @@
+#
+# Someone's Mattermost maintenance scripts.
+#   Copyright (c) 2016-2020 by Someone <someone@somenet.org> (aka. Jan Vales <jan@jvales.net>)
+#   published under MIT-License
+#
+# Config file.
+#   mv to config.py.examle config.py + edit.
+#
+
+mm_api_url = "..."
+mm_user = "..."
+mm_user_pw = "..."
+
+ics_config = {
+    "alias": ["ics-url",["channel1-id", "channel2-id", ]],
+    }
diff --git a/ics_to_channel/main.py b/ics_to_channel/main.py
new file mode 100755
index 0000000..a93a01c
--- /dev/null
+++ b/ics_to_channel/main.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+# Someone's Mattermost scripts.
+#   Copyright (c) 2016-2020 by Someone <someone@somenet.org> (aka. Jan Vales <jan@jvales.net>)
+#   published under MIT-License
+#
+# Send event-reminders to configured channels.
+#
+
+import datetime
+import pytz
+import pprint
+import time
+import traceback
+
+import icalendar
+import requests
+import mattermost
+
+import config
+
+def process_ics(mm, now, alias, ics_config):
+    c = icalendar.Calendar.from_ical(requests.get(ics_config[0]).text)
+    for ev in c.subcomponents:
+        if isinstance(ev,icalendar.cal.Event):
+            spam_mm = False
+            for remind in ev.subcomponents:
+                if isinstance(ev.get("DTSTART").dt,datetime.datetime):
+                    event_datetime = ev.get("DTSTART").dt
+                    alarm_datetime = ev.get("DTSTART").dt+remind.get("TRIGGER").dt
+
+                    # convert to now's tz
+                    event_datetime = (event_datetime-datetime.datetime.utcoffset(event_datetime)+datetime.datetime.utcoffset(now)).replace(second=0, tzinfo=now.tzinfo)
+                    alarm_datetime = (alarm_datetime-datetime.datetime.utcoffset(alarm_datetime)+datetime.datetime.utcoffset(now)).replace(second=0, tzinfo=now.tzinfo)
+
+                else:
+                    # why the diffrent handling of "full-day" events?!
+                    event_datetime = datetime.datetime.combine(ev.get("DTSTART").dt, datetime.datetime.min.time()).replace(second=0, tzinfo=now.tzinfo)
+                    alarm_datetime = (datetime.datetime.combine(ev.get("DTSTART").dt, datetime.datetime.min.time())+remind.get("TRIGGER").dt).replace(second=0, tzinfo=now.tzinfo)
+
+                seconds_to_reminder_time = (now-alarm_datetime).total_seconds()
+
+                if seconds_to_reminder_time >= 0 and seconds_to_reminder_time < 300:
+                    spam_mm = True
+
+            if spam_mm:
+                for channel_id in ics_config[1]:
+                    pprint.pprint(mm.create_post(channel_id, "``BOT-AUTODELETE-FAST`` #termin_reminder Datasource: "+alias+"\nUpcoming event at: **``"+str(event_datetime)+"``**\n### ``"+str(ev.get("SUMMARY"))+"``\n"+str(ev.get("DESCRIPTION"))))
+
+
+
+mm = mattermost.MMApi(config.mm_api_url)
+mm.login(config.mm_user, config.mm_user_pw)
+
+TS_START = time.time()
+now = datetime.datetime.now(tz=pytz.timezone("Europe/Vienna")).replace(second=0, microsecond=0)
+
+for alias, ics_config in config.ics_config.items():
+    try:
+        process_ics(mm, now, alias, ics_config)
+    except:
+        traceback.print_exc()
+    print("* ["+("%07.6g"%round(time.time() - TS_START, 5))+"] COMPLETED: "+alias)
+
+mm.logout()
-- 
2.43.0