First, when checking for existence of a file, deleted items are not
conisdered.
The working with fulltext search has been changed: deleted items are
removed from fulltext index and are re-added when they are restored.
The fulltext index currently doesn't hold the item state and it would
mean much more work to introduce it into the index (or, worse, to
reprocess the results from the index). Thus, deleted items can only be
searched using database queries. It is probably a very rare use case
when fulltext search should be applied to deleted items. They have
been deleted for a reason and the most likely case is that they are
simply removed.
Refs: #347
In order to keep deleted items for a while, the periodic task can now
use a duration to only remove items with a certain age. This can be
used to ensure that a deleted item stays at least X days before it
will be removed from the database.
Refs: #347
Before, there were periodic tasks run per collective and not user by
making sure that submitter + group are the same value. This is now
encoded in `UserTaskScope` so it is now obvious and errors can be
reduced when using this.
It's not very likely to have more modes of search besides normal and
trashed, but got surprised in that way quite often and it's nicer this
way anyways.
A new query/request parameter can be used to apply a search to only
soft-deleted items.
The query expression `Trashed` has been introduced which selects only
items with state `Deleted`. This is another option an analog to
`ValidItemStates` (both cannot be used together as they would select
no items). This new query node is not added to the parser, because
users may not use it in their own queries - it must be part of the
"fixed" query so the application can control in which subset to search
(it would otherwise be possible to select any items).
When deleting items via the http api, they are not deleted anymore but
a new status "Deleted" is set. The collective insights contains now a
count separately for deleted items.
