Prevent editing and deleting comments in locked conversations
Ref T13289. This tightens up a couple of corner cases around locked threads.
Locking is primarily motivated by two use cases: stopping nonproductive conversations on open source installs (similar to GitHub's feature); and freezing object state for audit/record-keeping purposes.
Currently, you can edit or remove comments on a locked thread, but neither use case is well-served by allowing this. Require "CAN_INTERACT" to edit or remove a comment.
Administrators can still remove comments from a locked thread to serve "lock a flamewar, then clean it up", since "Remove Comment" on a comment you don't own is fairly unambiguously an administrative action.
- On a locked task, tried to edit and remove my comments as a non-administrator. Saw appropriate disabled UI state and error dialogs (actions were disallowed).
- On a locked task, tried to remove another user's comments as an administrator. This works.
- On a normal task, edited comments normally.
Reviewed By: amckinley
Maniphest Tasks: T13289
Differential Revision: https://secure.phabricator.com/D20551