Soft Delete

[tsutomi]

Add support for soft-deleting entities in repositories so that they can be preserved after the deletion command is issued.

Proposed Solution

• Provide the contract ISoftDeletable, that entities will implement to notify the repositories the function is active for the entity repository
• When issuing a Remove command to the repository, if the entity is of type ISoftDeletable, update its state without removing it from the underlying data storage
• When querying the entities of type ISoftDeletable, an additional filter should be applied to exclude the instances that were soft-deleted
• Provide an interface to bypass the soft-delete state, and return even the entities that are marked as deleted (e.g. to run hard-delete processes)

Open Questions

• By design, entities might have statuses - should we provide a contract to access those statuses?
• If we have a status property of the entity, how can we determine which is the Deleted (or Soft-Deleted) status in the domain context of the entity?