Testing if a scheduled date is prior to another date

[Tim Landscheidt]

Hi,

in a capture template, I want to test whether the scheduled
date for a specific task is prior to another, calculated
date (and depending on the answer, insert a checkbox or
not).

I can get the scheduled date for the task by:

| (with-current-buffer (find-file-noselect "/path/to/file.org")
|   (save-mark-and-excursion
|     (goto-char
|      (org-find-entry-with-id "TASK_ID"))
|     (org-element-property ':scheduled (org-element-at-point))))

which returns a structure like:

| (timestamp
|  (:type active
|   :raw-value "<2021-08-30 Mo 08:00 .+4d>"
|   :year-start 2021
|   :month-start 8
|   :day-start 30
|   :hour-start 8
|   :minute-start 0
|   :year-end 2021
|   :month-end 8
|   :day-end 30
|   :hour-end 8
|   :minute-end 0
|   :begin 436166
|   :end 436192
|   :post-blank 0
|   :repeater-type restart
|   :repeater-value 4
|   :repeater-unit day))

However, comparing this value with org-time< & Co. is futile
as org-2ft always returns 0.

Before I wade through the various functions to build a con-
version chain, what is the best practice to compare time-
stamp values with dates?  (And if there is an org-mode func-
tion that checks if the task at point is scheduled prior to
another date, I'd appreciate pointers as well :-).)

TIA,
Tim