standardnotes-server/packages/syncing-server/src/Domain/Handler/TransitionStatusUpdatedEventHandler.ts

import {
  DomainEventHandlerInterface,
  DomainEventPublisherInterface,
  TransitionStatusUpdatedEvent,
} from '@standardnotes/domain-events'
import { Logger } from 'winston'
import { TransitionItemsFromPrimaryToSecondaryDatabaseForUser } from '../UseCase/Transition/TransitionItemsFromPrimaryToSecondaryDatabaseForUser/TransitionItemsFromPrimaryToSecondaryDatabaseForUser'
import { DomainEventFactoryInterface } from '../Event/DomainEventFactoryInterface'

export class TransitionStatusUpdatedEventHandler implements DomainEventHandlerInterface {
  constructor(
    private transitionItemsFromPrimaryToSecondaryDatabaseForUser: TransitionItemsFromPrimaryToSecondaryDatabaseForUser,
    private domainEventPublisher: DomainEventPublisherInterface,
    private domainEventFactory: DomainEventFactoryInterface,
    private logger: Logger,
  ) {}

  async handle(event: TransitionStatusUpdatedEvent): Promise<void> {
    if (event.payload.status === 'STARTED') {
      const result = await this.transitionItemsFromPrimaryToSecondaryDatabaseForUser.execute({
        userUuid: event.payload.userUuid,
      })

      if (result.isFailed()) {
        this.logger.error(`Failed to transition items for user ${event.payload.userUuid}: ${result.getError()}`)

        await this.domainEventPublisher.publish(
          this.domainEventFactory.createTransitionStatusUpdatedEvent(event.payload.userUuid, 'FAILED'),
        )

        return
      }

      await this.domainEventPublisher.publish(
        this.domainEventFactory.createTransitionStatusUpdatedEvent(event.payload.userUuid, 'FINISHED'),
      )
    }
  }
}