E-Paper-Calendar/Calendar/IcalEvents.py

74 lines
No EOL
2.7 KiB
Python

from CalendarInterface import CalendarInterface
from CalendarEvent import CalendarEvent
from ics import Calendar
from datetime import datetime, timedelta, timezone
from settings import week_starts_on
try:
from urllib.request import urlopen
except Exception as e:
print("Something didn't work right, maybe you're offline?" + e.reason)
class IcalEvents(CalendarInterface):
"""Fetches events from ical addresses."""
def __init__(self, urls, highlighted_urls=None):
self.urls = urls
self.highlighted_urls = highlighted_urls
super(IcalEvents, self).__init__()
def __get_events__(self):
events = self.__get_events_from_urls__(self.urls)
highlighted = self.__get_events_from_urls__(self.highlighted_urls)
highlighted = map(self.__highlight_event__, highlighted)
events.extend(highlighted)
return events
def __highlight_event__(self, event):
event.highlight = True
return event
def __get_events_from_urls__(self, urls):
loaded_events = []
try:
if urls is None:
return loaded_events
for calendar in urls:
decode = str(urlopen(calendar).read().decode())
fixed_decode = self.__fix_errors__(decode)
ical = Calendar(fixed_decode)
for event in ical.events:
cal_event = CalendarEvent()
cal_event.fetch_datetime = datetime.now()
cal_event.begin_datetime = event.begin.datetime
cal_event.end_datetime = event.end.datetime
cal_event.title = event.name
cal_event.description = event.description
cal_event.location = event.location
cal_event.allday = event.all_day
loaded_events.append(cal_event)
return loaded_events
except:
return loaded_events
def __fix_errors__(self, decode):
decode = self.__remove_alarms__(decode)
return decode.replace('BEGIN:VALARM\r\nACTION:NONE','BEGIN:VALARM\r\nACTION:DISPLAY\r\nDESCRIPTION:') \
.replace('BEGIN:VALARM\r\nACTION:EMAIL','BEGIN:VALARM\r\nACTION:DISPLAY\r\nDESCRIPTION:')
def __remove_alarms__(self, decode):
alarm_begin = 'BEGIN:VALARM'
alarm_end = 'END:VALARM'
lineseparation = '\r\n'
beginAlarmIndex = 0
while beginAlarmIndex >= 0:
beginAlarmIndex = decode.find(alarm_begin)
if beginAlarmIndex >= 0:
endAlarmIndex = decode.find(alarm_end, beginAlarmIndex)
decode = decode[:beginAlarmIndex] + decode[endAlarmIndex + len(alarm_end) + len(lineseparation):]
return decode