Standard libraries that lift up your code.
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import {Event} from '../../../event/Event'
import {Migration} from '../Migration'
import {Inject, Injectable} from '../../../di'
import {Migrations} from '../../services/Migrations'
import {ErrorWithContext} from '../../../util'
/**
* Generic base-class for migration-related events.
*/
@Injectable()
export abstract class MigrationEvent extends Event {
@Inject()
protected readonly migrations!: Migrations
/** The migration relevant to this event. */
private internalMigration: Migration
/**
* Get the relevant migration.
*/
public get migration(): Migration {
return this.internalMigration
}
constructor(
migration: Migration,
) {
super()
this.internalMigration = migration
}
dehydrate(): {identifier: string} {
return {
identifier: this.migration.identifier,
}
}
rehydrate(state: {identifier: string}): void {
const migration = this.migrations.get(state.identifier)
if ( !migration ) {
throw new ErrorWithContext(`Unable to find migration with identifier: ${state.identifier}`, {
identifier: state.identifier,
})
}
this.internalMigration = migration
}
}