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Re: [O] Temporary cancelling recurring tasks

From: Mikhail Skorzhinskiy
Subject: Re: [O] Temporary cancelling recurring tasks
Date: Thu, 26 Jan 2017 18:13:32 +0300
User-agent: mu4e 0.9.19; emacs

Take a look to http://karl-voit.at/2017/01/15/org-clone-subtree-with-time-shift/

On 2017-01-26T13:39:50+0300, Michael Welle wrote:

> Hello,
> I want to temporary cancel recurring tasks. Let's say I have tasks, that
> only make sense when I'm in my office. Now I'm away for a few months.
> The tasks would clutter my agenda. I could comment them, archive them or
> use org-cancel-repeater and set the task's state to DONE. But all that
> makes it hard to restore the previous state when I'm back in my office.
> I think, the clean solution is to set the state of the task to CANCELLED
> or STOPPED or something like that, to deactivate the recurring task.
> When I activate the task again, the scheduled date and the repeater
> should be restored. To achieve that, I tried the following:
> ;;
> ;; Deactivate/Activate recurring tasks
> ;;
> ;; Prior to Org commit 7d52a8c3cc86c8ce03eda006752af1ab4bed4316
> ;; there seems to be no way to set the repeater of a, let's say,
> ;; SCHEDULED property programmatically. So we use this function.
> (defun hmw/org-schedule-set-value (val)
>   "Sets the value of the SCHEDULED property. This allows for
> setting the repeater as well."
>   (interactive)
>   (save-excursion
>     (org-back-to-heading t)
>     (let ((bound1 (point))
>         (bound0 (save-excursion (outline-next-heading) (point))))
>       (when (re-search-forward
>            (concat "\\(" org-scheduled-time-regexp "\\)")
>            bound0 t)
>       (replace-match val t nil nil 2)))))
> (defvar hmw/org-scheduled-property-backup "DISABLED-SCHEDULED"
>   "Back up the original value of the SCHEDULED property into this
> property when deactivating a recurring task. The value is rescued from
> this property to initialise the SCHEDULED property when activating the
> task again.")
> (defvar hmw/org-activated-recurring-task-state "TODO"
>   "Switch a recurring task to this state after activating.")
> (defvar hmw/org-deactivated-recurring-task-state "CANCELLED"
>   "Switch a recurring task to this state after deactivating.")
> (defun hmw/org-deactivate-recurring-task ()
>   "Deactivate a recurring task. The value of the SCHEDULED property is
> stored in the property referenced by `hmw/org-scheduled-property-backup',
> so it can be restored later. The task's state is set to the value of
> `hmw/org-deactivated-recurring-task-state'." 
>   (interactive)
>   (when (org-entry-is-todo-p)
>     (save-excursion
>       (org-back-to-heading t)
>       (let* ((pom (point-at-bol))
>              (val (org-entry-get pom "SCHEDULED")))
>         (when val
>         ;; Remove the time stamp meaning. We don't want active
>         ;; timestamp to trigger any actions for the deactivated
>         ;; task.
>         (setq val (replace-regexp-in-string "^<\\(.*\\)>$" "\\1" val))
>         (org-entry-put pom hmw/org-scheduled-property-backup val)
>         (org-entry-put pom "SCHEDULED" nil)
>         (org-todo hmw/org-deactivated-recurring-task-state))))))
> (defun hmw/org-activate-recurring-task ()
>   "Activate a previously deactivated recurring task. The value of the
> SCHEDULED property is retrieved from the property referenced by
> `hmw/org-scheduled-property-backup', which is then deleted. The task's 
> state is set to the value of `hmw/org-activated-recurring-task-state'."
>   (interactive)
>   (when (org-entry-is-done-p)
>     (save-excursion
>       (org-back-to-heading t)
>       (let* ((pom (point-at-bol))
>              (val (org-entry-get pom hmw/org-scheduled-property-backup)))
>         (when val
>         ;; For Org commit 7d52a8c3cc86c8ce03eda006752af1ab4bed4316 or
>         ;; later use this
>         ;;(setq val (replace-regexp-in-string "^\\(.*\\)$" "<\\1>" val))
>         ;;(org-entry-put pom "SCHEDULED" val)
>         ;; For older Org use this
>         (org-entry-put pom "SCHEDULED" val)
>         (hmw/org-schedule-set-value val)
>         (org-entry-delete pom hmw/org-scheduled-property-backup)
>         (org-todo hmw/org-activated-recurring-task-state))))))
> The idea is to store the value of the SCHEDULED property somewhere when
> the task gets deactivated. Later, on activation, the property value is
> restored.
> There are two variants. The one above, which should work for Org prior
> to commit 7d52a8c3cc86c8ce03eda006752af1ab4bed4316 and also for later
> revisions. And one for that commit and later. If you use the newer Org
> revision, you optionally can get rid of the function
> hw/org-schedule-set-value and follow the comments in
> hmw/org-activate-recurring-task.
> Regards
> hmw

Skorzhinskiy Mikhail

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