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Refactor code to be more modular. open_cal() now returns both the list

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of events as well as the calendar itself, so that you can get the field
calendar.CALENDAR_TIMEZONE

This is useful in formatting events that happen for the entire day, as
their start and end do not have start fields.

Also implemented format_events so that all events start and end time are
in datetime.datetime format, rather than datetime.date format. This
allows sortedevents to run regardless of events are for a specified time
or the whole day.
This commit is contained in:
Thanh 2021-08-28 18:39:02 +10:00
parent 6c4d903d50
commit 8172b653ac
1 changed files with 63 additions and 25 deletions
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88
ical2csv.py
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@ -1,14 +1,15 @@
#!/usr/bin/python3
import sys
import os.path
from icalendar import Calendar
import csv
import datetime
import os.path
import pytz
import sys
from icalendar import Calendar
# use this for events that do not have its own timezone
filename = sys.argv[1]
# TODO: use regex to get file extension (chars after last period), in case it's not exactly 3 chars.
file_extension = str(sys.argv[1])[-3:]
headers = ('Summary', 'UID', 'Description', 'Location', 'Start Time', 'End Time', 'URL')
class CalendarEvent:
"""Calendar event class"""
@ -19,38 +20,34 @@ class CalendarEvent:
start = ''
end = ''
url = ''
def __init__(self, name):
self.name = name
events = []
CALENDAR_TIMEZONE = None
def open_cal():
events = []
if os.path.isfile(filename):
if file_extension == 'ics':
print("Extracting events from file:", filename, "\n")
f = open(sys.argv[1], 'rb')
gcal = Calendar.from_ical(f.read())
gcal.CALENDAR_TIMEZONE = pytz.timezone(gcal.get("X-WR-TIMEZONE").encode('utf8').decode())
for component in gcal.walk():
event = CalendarEvent("event")
if component.get('TRANSP') == 'TRANSPARENT': continue #skip event that have not been accepted
if component.get('SUMMARY') == None: continue #skip blank items
event = CalendarEvent()
if component.get('TRANSP') == 'TRANSPARENT': continue # skip event that have not been accepted
if component.get('SUMMARY') is None: continue # skip blank items
event.summary = component.get('SUMMARY')
event.uid = component.get('UID')
if component.get('DESCRIPTION') == None: continue #skip blank items
if component.get('DESCRIPTION') is None: continue # skip blank items
event.description = component.get('DESCRIPTION')
event.location = component.get('LOCATION')
if hasattr(component.get('dtstart'), 'dt'):
event.start = component.get('dtstart').dt
if hasattr(component.get('dtend'), 'dt'):
event.end = component.get('dtend').dt
event.url = component.get('URL')
events.append(event)
f.close()
return events, gcal
else:
print("You entered ", filename, ". ")
print(file_extension.upper(), " is not a valid file format. Looking for an ICS file.")
@ -64,11 +61,13 @@ def open_cal():
def csv_write(icsfile):
csvfile = icsfile[:-3] + "csv"
try:
with open(csvfile, 'w') as myfile:
with open(csvfile, 'w', newline='') as myfile:
wr = csv.writer(myfile, quoting=csv.QUOTE_ALL)
wr.writerow(headers)
for event in sortedevents:
values = (event.summary.encode('utf8').decode(), event.uid, event.description.encode('utf8').decode(), event.location, event.start, event.end, event.url)
values = (event.summary.encode('utf8').decode(), event.uid,
event.description.encode('utf8').decode(),
event.location, event.start, event.end, event.url)
wr.writerow(values)
print("Wrote to ", csvfile, "\n")
except IOError:
@ -86,7 +85,46 @@ def debug_event(class_name):
print(class_name.end)
print(class_name.url, "\n")
open_cal()
sortedevents=sorted(events, key=lambda obj: obj.start) # Needed to sort events. They are not fully chronological in a Google Calendard export ...
csv_write(filename)
#debug_event(event)
def format_all_day_events(event_list, default_timezone=pytz.timezone("UTC"),
default_start_time=datetime.time(hour=9, minute=0, second=0),
default_end_time=datetime.time(hour=17, minute=0, second=0)
):
_events = event_list
for e in _events:
if isinstance(e.start, datetime.datetime) or isinstance(e.end, datetime.datetime):
pass
# if there is no start-end time (event happening for the whole day
else:
# change event's start and end timezone to timezone of the whole calendar itself
timezone = default_timezone
# print(timezone)
# change event's start and end time to some arbitrary time
# I prefer 9 - 5 events
e.start = datetime.datetime.combine(e.start, default_start_time)
e.end = datetime.datetime.combine(e.end, default_end_time)
# change timezone
if timezone is not None:
e.start = e.start.replace(tzinfo=timezone)
e.end = e.end.replace(tzinfo=timezone)
else:
# error when e.create.tzinfo is None (which should never really happen)
e.start = e.start.replace(tzinfo=default_timezone)
e.end = e.end.replace(tzinfo=default_timezone)
# print("Start time: {start}, end time: {end}".format(start=e.start, end=e.end))
return _events
if __name__ == "__main__":
filename = sys.argv[1]
# TODO: use regex to get file extension (chars after last period), in case it's not exactly 3 chars.
file_extension = str(sys.argv[1])[-3:]
headers = ('Summary', 'UID', 'Description', 'Location', 'Start Time', 'End Time', 'URL')
events, calendar = open_cal()
formatted_events = format_all_day_events(events, default_timezone=calendar.CALENDAR_TIMEZONE)
sortedevents = sorted(formatted_events, key=lambda obj: obj.start)
csv_write(filename)
# debug_event(event)