added fetch script for calendar events that should appear under "Termine"

.gitignore

@@ -1,3 +1,4 @@
 output/
 __pycache__/
 *.code-workspace
+utils/.caldav_pass

utils/refresh-events.py

@@ -0,0 +1,45 @@
+import caldav
+from datetime import datetime
+import vobject
+import yaml
+
+server_url = "https://***REMOVED***
+cal_user = "tobias"
+cal_url = "https://***REMOVED***
+cal_category = "Lesung/Veranstaltung"
+metadata_keys = ["summary", "dtstart", "dtend", "description", "location"]
+result_file = "../content/pages/termine.md"
+
+# get passwort
+with open(".caldav_pass", "r") as f:
+  cal_pass = f.read().strip()
+
+# create vobject calendar
+vcal = vobject.newFromBehavior("vcalendar")
+
+# establish connection to caldav server 
+with caldav.DAVClient(url=server_url, username=cal_user, password=cal_pass) as dav_client:
+  # establish connection to calendar
+  dav_cal = dav_client.calendar(url=cal_url)
+
+  # put all events from caldav calendar into vobject calendar
+  for e in dav_cal.events():
+    for ev in e.instance.contents["vevent"]:
+      vcal.add(ev)
+  
+# we only want events belonging to a specific category 
+events = [e for e in vcal.getChildren() if "categories" in e.contents.keys() and cal_category in map(lambda x: x.value[0], e.contents["categories"])]
+
+# convert events into a structure that Pelican can use  
+events = [{k: v[0].value for k, v in e.contents.items() if k in metadata_keys} for e in events]
+
+# keep only future events  
+today = datetime.today().date()
+events = [e for e in events if e["dtstart"].date() >= today] 
+
+# write data as YAML
+with open(result_file, 'w') as f:
+  f.write("---\n")
+  yaml.dump({"termine": events}, f)
+  f.write("---\n")
+