Check-out of an item "in transit"

[pronguen]

An item which is "in transit" cannot be checked out. This should be possible, if the item has no request, or if the request is for the user concerned by the check-out.

[BadrAly]

According to the state chart in-transit items needs the action receive first before the checkout action.

We can allow the execution of these two actions receive + checkout in one step ONLY if the librarian is logged on to the library = request.pickup_library.

Any ideas @iGormilhit and @pronguen ?

[pronguen]

Two cases:

1. The item has no request (it is in transit to owning library): in that case, it should be possible to check it out for any one, from any library.
2. The item has a request (it is in transit to pickup library): in that case, is should be
   2.1 possible to check it out, if it is for the user holding a request on this item (first in the request list)
   2.2 impossible to check it out, if it is for another user (holding no request, or holding a request but not at first position in the request list)

Ideally, the state chart must allow a check-out, even if it not from the pick-up library, as soon as the above mentioned conditions are satisfied. There is no need (no use case) to verify the pick-up library.

[BadrAly]

👍 OK to resume in state chart terminology:-

Case 1: checkout is possible if loan.status = ITEM_IN_TRANSIT_TO_HOUSE and item has no pending requests. The active loan will be marked as CANCELLED

Case 2.1: checkout is possible if loan.status = ITEM_IN_TRANSIT_FOR_PICKUP and loan.patron_id = checked-out patron