Any user can request the deletion of their account. This can be done via user settings.
When a user deletes their account, it is soft-deleted. Along with it, all user's posts, and created discussions are deleted in the same way.
If there are any replies to a user's posts (other than discussions of which he or she is the author)
we leave them in the database, but with the date in the marked_as_deleted field, so we can preserve
the structure of the discussion and distinguish which post should be given special treatment
when we display the thread.
We give user 7 days to change her/his mind. This is configurable via Config\Forum::accountDeleteAfter variable.
We send a reminder 3 and 1 day (days are declared via command call) before user's account is permanently deleted. In the message, we provide a link which can be used to restore the account.
After 7 days the account is removed permanently. Along with the user account we remove all the images, that were linked to the removed threads and posts.
If we're going to remove user, we should always use soft-delete option first. This is because, when the account is soft-deleted, we are re-calculating all the stats for users, threads and categories.
Only after that we can remove the user from the database.
Removing related images automatically is not yet supported via model event.
It's implemented only by accounts:delete command.