114 lines
3.5 KiB
Python
Executable File
114 lines
3.5 KiB
Python
Executable File
import caldav
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import vobject
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from datetime import datetime, date, time
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import yaml
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server_url = "https://***REMOVED***
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cal_user = "tobias"
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cal_url = "https://***REMOVED***
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cal_category = "Veranstaltung"
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result_file = "../content/pages/termine.md"
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now = datetime.now().astimezone()
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cal_properties = [ # taken from ical specification
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# descriptive
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"attach", "categories", "class", "comment", "description", "geo", "location", "percent-complete", "priority", "resources", "status", "summary",
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# date and time
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"completed", "dtend", "due", "dtstart", "duration", "freebusy", "transp",
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# timezone components
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"tzid", "tzname", "tzoffsetfrom", "tzoffsetto", "tzurl",
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# relationship
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"attendee", "contact", "organizer", "recurrence-id", "related-to", "url", "uid",
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# recurrence
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"exdate", "exrule", "rdate", "rrule",
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# alarm
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# "action", "repeat", "trigger",
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# change management
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"created", "dtstamp", "last-modified", "sequence"
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]
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cal_prop_datetimes = ["dtend", "due", "dtstart", "duration", "dtstamp", "last-modified"]
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"""Converts a datetime.datetime or datetime.date object into an aware datetime object."""
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def fixDatetime(d, t=None, tz=None):
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if not tz:
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tz = now.tzinfo
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# datetime object is made aware if necessary
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if type(d) == datetime:
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if d.tzinfo:
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return d
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else:
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return datetime(d.date(), d.time(), tz)
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# raise error if d is neither datetime nor date
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elif type(d) != date:
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raise TypeError("parameter must be a datetime.date or datetime.datetime object")
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# d is a date object
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if not t:
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t = time(23, 59, 59, tzinfo=tz) # if no time parameter was passed, use 23:59:59
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if not t.tzinfo:
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t.replace(tzinfo=tz)
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return datetime.combine(d, t)
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# get password
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with open(".caldav_pass", "r") as f:
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cal_pass = f.read().strip()
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# create vobject calendar
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vcal = vobject.newFromBehavior("vcalendar")
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# establish connection to caldav server
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with caldav.DAVClient(url=server_url, username=cal_user, password=cal_pass) as dav_client:
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# establish connection to calendar
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dav_cal = dav_client.calendar(url=cal_url)
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# put all events from caldav calendar into vobject calendar
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for e in dav_cal.events():
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for ev in e.instance.contents["vevent"]:
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vcal.add(ev)
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# we only want events belonging to a specific category
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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"])]
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# convert events into a structure suitable for Pelican
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e_tmp = []
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for e in events:
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d = {}
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for k, v in e.contents.items():
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# only keep specific calendar properties
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if not k in cal_properties:
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continue
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# v is usually a list with a single item
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if len(v) == 1:
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d[k] = v[0].value
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# but sometimes there's more than one item (this only ever happens when k is "categories")
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# and in this case, each list item's value is itself a one item list (which is stupid but that's how vobject handles categories)
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else:
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d[k] = [v[i].value[0] for i in range(len(v))]
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e_tmp.append(d)
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events = e_tmp
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# fix dates and datetimes
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for e in events:
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for k in e.keys():
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if k in cal_prop_datetimes:
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e[k] = fixDatetime(e[k])
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# keep only future events
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events = [e for e in events if e["dtstart"] >= now]
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# sort by start date
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events.sort(key=lambda e: e["dtstart"])
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# write data as YAML
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with open(result_file, 'w') as f:
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f.write("---\n")
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yaml.dump({"termine": events}, f)
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f.write("---\n")
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f.write("written at " + datetime.today().isoformat(" "))
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