Re: ox-icalendar: Filter todo-types

[Ihor Radchenko <yantar92@posteo.net>]

Michaël Cadilhac <michael@cadilhac.name> writes:

>> > Perhaps we could have an option ox-icalendar-export-todo-keywords-as
>> > which could determine whether a keyword should be exported, and if so
>> > with what status, e.g.:
>> >
>> > (defcustom ox-icalendar-export-todo-keywords-as
>> >  '((no-export . ("SKIP"))
>> >    (cancelled . ("KILLED" "CANCELLED"))
>> >    (in-process . ("PROG"))))
> ...
>> Maybe we can expand the allowed values of `org-icalendar-include-todo' instead?
>
> I don't think this is the purpose of `include-todo', which seems to be
> specific to VTODO vs VEVENT.  Do you have something in mind that
> combines that feature with STATUS?

You are right that `org-icalendar-include-todo' is only affecting VTODO,
but not VEVENT.

My concern is mostly that "(no-export . ("SKIP"))" is somewhat similar
to `org-icalendar-include-todo' set to a list of todo keywords.  So, it
may be confused with VTODO-specific option.

Another concern is that we already have `org-export-with-tasks' where
you can specify which todo keywords should be exported and which
headings should be exported, according to their todo keyword. So,
"no-export" appears to unnecessary.

What is unique to icalendar exporter is the STATUS property. Having a
setting to set it according to todo keyword would indeed make sense.

However, after I looked at the RFC in more details now, I can see that
the values of STATUS property depend on the entry type:

       statvalue-event = "TENTATIVE"    ;Indicates event is tentative.
                       / "CONFIRMED"    ;Indicates event is definite.
                       / "CANCELLED"    ;Indicates event was cancelled.
       ;Status values for a "VEVENT"

       statvalue-todo  = "NEEDS-ACTION" ;Indicates to-do needs action.
                       / "COMPLETED"    ;Indicates to-do completed.
                       / "IN-PROCESS"   ;Indicates to-do in process of.
                       / "CANCELLED"    ;Indicates to-do was cancelled.
       ;Status values for "VTODO".

       statvalue-jour  = "DRAFT"        ;Indicates journal is draft.
                       / "FINAL"        ;Indicates journal is final.
                       / "CANCELLED"    ;Indicates journal is removed.
      ;Status values for "VJOURNAL".

Maybe we can introduce separate variables mapping todo keyword to status
depending on the entry type (VTODO vs. VEVENT; we do not export VJOURNAL)?

-- 
Ihor Radchenko // yantar92,
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