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bug#29116: 24.5; Parsing dates from VCAL

From: Robert Pluim
Subject: bug#29116: 24.5; Parsing dates from VCAL
Date: Mon, 06 Nov 2017 11:01:32 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/26.0.90 (gnu/linux)

Vegard Vesterheim <address@hidden> writes:

> On Sun, 05 Nov 2017 11:19:08 +0100 Robert Pluim <address@hidden> wrote:
>> Vegard Vesterheim <address@hidden> writes:
>>> Looking at the backtrace it seems that the problem is related to parsing
>>> the date string: "20171208".
>> timezone-parse-date assumes that the time-of-day is present in the
>> string to be parsed, which is not the case here. Looking at the code
>> icalendar should set the time to "00000" in that case. Would you have
>> a complete example VCAL file?
> Attached:

Thanks for that.

> My naive workaraound for this bug was to modify the function
> gnus-icalendar-event--decode-datafile:
> (defun gnus-icalendar-event--decode-datefield (ical field)
>   (let* ((date (icalendar--get-event-property ical field))
>          (date-props (icalendar--get-event-property-attributes ical field))
>          (tz (plist-get date-props 'TZID)))
>     ;; VVWASHERE-start, fix bug in parsing DATE
>     (and (eq (car date-props) 'VALUE)
>          (string= (car (cdr date-props)) "DATE")
>          (setq date (concat date "T00:00")))
>     ;; VVWASHERE-end, fix bug in parsing DATE

I thought the spec called for T000000, but if it's working for you,
then leave well enough alone.

>     (cdr date-props)
>     (date-to-time (timezone-make-date-arpa-standard date nil tz))))

Duh, I've been looking at the wrong branch. This looks like it was
fixed by 417cf67485, which is available in the 25.1 release or later.


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