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package org.apache.james.task.eventsourcing

import org.apache.james.eventsourcing.Event
import org.apache.james.task.TaskManager.Status

case class DecisionProjection(status: Option[Status]) {
  def update(event: Event): DecisionProjection = {
    DecisionProjection(
      event match {
        case event: Created => Some(Status.WAITING)
        case event: Started => Some(Status.IN_PROGRESS)
        case event: CancelRequested => Some(Status.CANCEL_REQUESTED)
        case event: Cancelled => Some(Status.CANCELLED)
        case event: Completed => Some(Status.COMPLETED)
        case event: Failed => Some(Status.FAILED)
        case event: AdditionalInformationUpdated => status
      }
    )
  }

}

object DecisionProjection {
  def empty: DecisionProjection = DecisionProjection(None)
}