[Akonadi] [Bug 453052] New: Unable to upload events to radicale

[aunderscored]

https://bugs.kde.org/show_bug.cgi?id=453052

            Bug ID: 453052
           Summary: Unable to upload events to radicale
           Product: Akonadi
           Version: 5.20.0
          Platform: openSUSE RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: DAV Resource
          Assignee: kdepim-bugs at kde.org
          Reporter: aunderscored+kde at gmail.com
                CC: carl at carlschwan.eu, claudio.cambra at gmail.com
        Depends on: 452656
  Target Milestone: ---

+++ This bug was initially created as a clone of Bug #452656 +++
Copying this from the other one just in case I missed where I should be sending
this

SUMMARY
***
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***


STEPS TO REPRODUCE
1. 
2. 
3. 

OBSERVED RESULT


EXPECTED RESULT


SOFTWARE/OS VERSIONS
Windows: 
macOS: 
Linux/KDE Plasma: 
(available in About System)
KDE Plasma Version: 
KDE Frameworks Version: 
Qt Version: 

ADDITIONAL INFORMATION
SUMMARY
It would appear that in some cases, the information provided to the calDAV
server is invalid, causing it to be rejected.

Specifically, `VTIMEZONE` components missing a required `STANDARD` or
`DAYLIGHT` component as noted in RFC5545 (a VTIMEZONE component MUST contain at
least one `standardc (STANDARD)` or `daylightc (DAYLIGHT)` component --
https://datatracker.ietf.org/doc/html/rfc5545#section-3.6.5 )


STEPS TO REPRODUCE
1. Start to create a new event on a calendar hosted on a radicale (I'd assume
others but havent tested)
2. Set the timezone to Africa/Johannesburg (this is my local timezone --
Obvserved issue with `UTC-10` as well)
3. Save the event

OBSERVED RESULT
```
BEGIN:VCALENDAR
PRODID:-//K Desktop Environment//NONSGML libkcal 4.3//EN
VERSION:2.0
X-KDE-ICAL-IMPLEMENTATION-VERSION:1.0
BEGIN:VTIMEZONE
TZID:Africa/Johannesburg
END:VTIMEZONE
BEGIN:VEVENT
DTSTAMP:20220415T111224Z
CREATED:20220415T111224Z
UID:84632fb4-6e5e-40ed-9d05-c8192822574a
LAST-MODIFIED:20220415T111224Z
SUMMARY:test four
DTSTART;TZID=Africa/Johannesburg:20220417T131500
DTEND;TZID=Africa/Johannesburg:20220417T141500
TRANSP:OPAQUE
END:VEVENT
END:VCALENDAR
```

Is sent to the calDAV server, note the invalid VTIMEZONE of:
```
BEGIN:VTIMEZONE
TZID:Africa/Johannesburg
END:VTIMEZONE
```
Where it should include a STANDARD clause indicating its offset

All this ends with is radicale rejecting the invalid event, and thus it not
being propagated to things

EXPECTED RESULT
Event is correctly sent to my calDAC server


Referenced Bugs:

https://bugs.kde.org/show_bug.cgi?id=452656
[Bug 452656] Unable to upload events to radicale
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