Function MutationAction

src/mutationaction.ts:93–133

(
  paramsOrTarget: MutationActionParams<T> | M,
  key?: string | symbol,
  descriptor?: TypedPropertyDescriptor<(...args: any[]) => Promise<Partial<K> | undefined>>
)

 * @constructor
 */
export function MutationAction<T, K, M extends K>(
  paramsOrTarget: MutationActionParams<T> | M,
  key?: string | symbol,
  descriptor?: TypedPropertyDescriptor<(...args: any[]) => Promise<Partial<K> | undefined>>
):
  | ((
      target: T,
      key: string | symbol,
      descriptor: TypedPropertyDescriptor<(...args: any[]) => Promise<Partial<T> | undefined>>
    ) => void)
  | void {
  if (!key && !descriptor) {
    /*
     * This is the case when `paramsOrTarget` is params.
     * i.e. when used as -
     * <pre>
        @MutationAction({mutate: ['incrCount']})
        async getCountDelta() {
          return {incrCount: 5}
        }
     * </pre>
     */
    return mutationActionDecoratorFactory(paramsOrTarget as MutationActionParams<T>)
  } else {
    /*
     * This is the case when `paramsOrTarget` is target.
     * i.e. when used as -
     * <pre>
        @MutationAction
        async getCountDelta() {
          return {incrCount: 5}
        }
     * </pre>
     */
    mutationActionDecoratorFactory({} as MutationActionParams<K>)(
      paramsOrTarget as K,
      key!,
      descriptor!
    )
  }
}