import { MapLike } from "map-like";
import { UseCaseLike } from "./UseCaseLike";
import { UseCaseExecutor } from "./UseCaseExecutor";
/*

## UseCase instance lifecycle

Each UseCase instance is managed by UseCaseInstanceMap.

P: Parent UseCase
C: Child UseCase
Add: Add instance to UseCaseInstanceMap
Delete: Remove instance from UseCaseInstanceMap

    Add P         Delete P   Delete C
    |---------------|          |
    P    |                     |
         C---------------------|
      Add C              |
                         |
                     Point X

If C refer to P on `Point X`, it will not be working correctly.
Almin will say that `This P(parent UseCase) is already released!"

See also https://almin.js.org/docs/warnings/usecase-is-already-released.html
 */
/**
 * This Map maintains a mapping instance of UseCase
 * A UseCase will execute and add it to this map.
 * A UseCase was completed and remove it from this map.
 */
export const UseCaseInstanceMap = new MapLike<UseCaseLike, UseCaseExecutor<any>>();