Is it possible for plugin to act on topic timestamp change? Is there an example of it?
Take a look at DiscourseEvent
. You can tie into those via plugin and do stuff when they happen. You can find the list of event by searching the repo.
The ones that may apply to what you’re looking for:
post_destroyed
topic_destroyed
before_create_post
before_create_topic
post_edited
topic_status_updated
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