Idea for event handlers in Org mode

gists.org

@@ -79,6 +79,26 @@ Put this in ~/.termux/termux.properties for a better Emacs experience inside Ter
   | 2022-11-26 | 140 |
 #+end_src
 
+** Idea: event handlers :idea:
+
+Have =ON_<STATE>= properties containing code that evaluates when that state is reached. Can be looked up and evaluated from =org-after-todo-state-change-hook=.
+
+#+begin_src org :tangle gists/org-event-handlers.org
+  ,* TODO Update metric
+  :PROPERTIES:
+  :ON_DONE:  (org-babel-execute-subtree)
+  :END:
+
+  ,#+begin_src elisp :results table append
+    (with-temp-buffer
+      (insert-file-contents user-init-file)
+      (list (format-time-string "%F") (count-matches "(use-package ")))
+  ,#+end_src
+
+  ,#+RESULTS:
+  | 2022-11-26 | 140 |
+#+end_src
+
 * vertico-repeat setup :emacs:vertico:
 
 My vertico-repeat setup.

gists/org-event-handlers.org

@@ -0,0 +1,13 @@
+* TODO Update metric
+:PROPERTIES:
+:ON_DONE:  (org-babel-execute-subtree)
+:END:
+
+#+begin_src elisp :results table append
+  (with-temp-buffer
+    (insert-file-contents user-init-file)
+    (list (format-time-string "%F") (count-matches "(use-package ")))
+#+end_src
+
+#+RESULTS:
+| 2022-11-26 | 140 |