[BUG] [tw_caldav_sync] iCalendar package throw exception for tasks with no priority and fails to sync #151
Description
Describe the bug
Syncing with caldav throws an error because the icalendar package throws an error converting tasks with no priority.
end of logs:
File "/Users/user/Library/Python/3.9/lib/python/site-packages/caldav/lib/vcal.py", line 116, in create_ical
component.add(prop, props[prop])
│ │ │ │ └ 'priority'
│ │ │ └ {'summary': 'test no priority', 'priority': '', 'description': '', 'status': 'NEEDS-ACTION', 'due': None, 'categories': None,...
│ │ └ 'priority'
│ └ <function Component.add at 0x103dbeb80>
└ VTODO({'DTSTAMP': vDDDTypes(2025-05-23 11:27:26.165897+00:00, Parameters({})), 'UID': vText('b'159ae562-3775-11f0-bbc4-fe1681...
File "/Users/user/Library/Python/3.9/lib/python/site-packages/icalendar/cal.py", line 192, in add
value = self._encode(name, value, parameters, encode)
│ │ │ │ │ └ 1
│ │ │ │ └ None
│ │ │ └ ''
│ │ └ 'priority'
│ └ <staticmethod object at 0x103d870a0>
└ VTODO({'DTSTAMP': vDDDTypes(2025-05-23 11:27:26.165897+00:00, Parameters({})), 'UID': vText('b'159ae562-3775-11f0-bbc4-fe1681...
File "/Users/user/Library/Python/3.9/lib/python/site-packages/icalendar/cal.py", line 143, in _encode
obj = klass(value)
│ └ ''
└ <class 'icalendar.prop.vInt'>
File "/Users/user/Library/Python/3.9/lib/python/site-packages/icalendar/prop.py", line 219, in __new__
self = super().__new__(cls, *args, **kwargs)
│ │ └ {}
│ └ ('',)
└ <class 'icalendar.prop.vInt'>
ValueError: invalid literal for int() with base 10: ''
To Reproduce
Brand new install on OSX using pip3.
Sync with Baikal or Nextcloud
Expected Behavior
Sync tasks regardless of if they have priority or not
📸 Screenshots
If applicable, add screenshots to help explain your problem.
Versions
OS Version (cat /etc/*-release; uname -a)
OSX
Darwin LM-WWGL4LK7T3 24.4.0 Darwin Kernel Version 24.4.0: Fri Apr 11 18:33:47 PDT 2025; root:xnu-11417.101.15~117/RELEASE_ARM64_T6030 arm64
Python version (python --version; python3 --version)
Python 3.13.3
Python 3.9.6
--version of your executable
E.g., with tw_gcal_sync, provide the output of tw_gcal_sync --version:
tw_caldav_sync, version 1.8.8
Additional context
It seems that removing this else statement to not add any priority property fixes the issue. But I'm not sure if that causes any downstream issues
syncall/syncall/tw_caldav_utils.py
Line 94 in 7b61977