Re: Export to iCalendar only not DONE, scheduled tasks?

[Arun Persaud <apersaud@lbl.gov>]

Hi

On 05/10/2014 07:55 AM, Chris Poole wrote:
> On Mon, May 5, 2014 at 11:08 PM, Arun Persaud <apersaud@lbl.gov
> <mailto:apersaud@lbl.gov>> wrote:
> 
>     pretty sure this can be done. I export only events to an ics file that
>     have a start and an end date and are not in a certain category. For this
>     I use
> 
> 
> That's great, thank you. I have this, but it doesn't work:
> 
> (defun filter-scheduled-todo-tasks (content backend info)
>   "Filter iCalendar export to include only TODO tasks that are
> not done, but which are scheduled or have a deadline."
>   (when (eq backend 'icalendar)
>     (if (and (org-entry-is-todo-p)
>              (not (org-entry-is-done-p))
>              (or (org-get-scheduled-time (point))
>                  (org-get-deadline-time (point))))
>         content nil)))
> 
> ... called with:
> 
> (let ((org-export-filter-final-output-functions
>          '(filter-scheduled-todo-tasks)))
>     (org-icalendar-combine-agenda-files))

had another look and org-export-filter-final-output-functions is the
wrong function to use. I'm not really using the ical export anymore and
when the org exporter got updated a while ago, I apparently didn't
update this correctly. Sorry about that.

I think the correct way is probably something like:

(defun filter-scheduled-todo-tasks (data backend info)
   ; add check for backend
  (org-element-map data 'headline 'my-debug info)
  data)

(defun org-mycal-export ()
  (let ((org-export-filter-parse-tree-functions
'(filter-scheduled-todo-tasks)))
    (org-icalendar-combine-agenda-files)))

the filter function is called before each entry is transcoded into ical
format and gets the whole parse tree. You can then loop through the
parse tree with org-element-map looking at each headline (not 100% sure
if headline is the correct thing to use). Each headline has for example
properties set that you can use to filter. You can access them using
things like:

(defun my-debug (e)
    (message "+++++++++++++++++++++++++")
    (message (buffer-substring (org-element-property :begin e)
(org-element-property :end e)))
    (message "------")
    (message "%S" (org-element-property :raw-value e))
    (message "------ todo")
    (message "%S" (org-element-property :todo-keyword e))
    (message "------ todo type")
    (message "%S" (org-element-property :todo-type e))
    (message "------ tags")
    (message "%S" (org-element-property :tags e))
    (message "------ level")
    (message "%S" (org-element-property :level e))
    (message "*********************"))

To ignore a headline, I think, you can mark it using

(org-export-ignore-element headline info)

where headline would be the same as argument 'e' in my-debug, but I
haven't played around with this yet. I found

http://searchcode.com/codesearch/view/48068680

which uses the function and perhaps you can get an idea how things work
from it.

Arun