@dugongjs/core
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JavaScript
var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
return c > 3 && r && Object.defineProperty(target, key, r), r;
};
var __metadata = (this && this.__metadata) || function (k, v) {
if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
};
var _a, _b;
import { Type } from "class-transformer";
import { v4 as uuid } from "uuid";
import { AbstractEventSourcedAggregateRoot } from "../abstract-event-sourced-aggregate-root/abstract-event-sourced-aggregate-root.js";
import { AggregateIdSetOutsideCreationContextError } from "./errors/aggregate-id-set-outside-creation-context.error.js";
import { MutateEventOutsideCommandContextError } from "./errors/mutate-event-outside-command-context.error.js";
export const IsInProcessContext = Symbol("IsInProcessContext");
export const IsInCreationContext = Symbol("IsInCreationContext");
export class AbstractAggregateRoot extends AbstractEventSourcedAggregateRoot {
constructor() {
super(...arguments);
this[_a] = false;
this[_b] = false;
this.stagedEvents = new Map();
}
/**
* Gets the staged domain events.
* @returns An array of staged domain events.
*/
getStagedDomainEvents() {
return Array.from(this.stagedEvents.values());
}
/**
* Gets the staged domain events that have not been applied yet.
* @returns An array of staged domain events that have not been applied yet.
*/
getStagedDomainEventsNotApplied() {
return this.getStagedDomainEvents().filter((event) => event.getSequenceNumber() > this.getCurrentDomainEventSequenceNumber());
}
createDomainEvent(domainEventClass, payload) {
this.validateCommandContext();
if (!this.getId()) {
this.validateCreationContext();
this.setId(uuid());
}
const event = new domainEventClass(this.getId(), ...(payload !== undefined ? [payload] : []));
event.setId(uuid()).setTimestamp(new Date());
// Call the lifecycle method onCreate if it exists.
event.onCreate?.();
return event;
}
/**
* Stages one or more domain events. The events are given a sequence number based on the current event sequence number.
* The sequence number is incremented for each event staged.
* @param domainEvents The domain events to stage.
*/
stageDomainEvent(...domainEvents) {
this.validateCommandContext();
const highestStagedEventSequenceNumber = Math.max(...Array.from(this.stagedEvents.keys()), 0);
let sequenceNumber = Math.max(this.getCurrentDomainEventSequenceNumber(), highestStagedEventSequenceNumber);
for (const domainEvent of domainEvents) {
domainEvent.setSequenceNumber(++sequenceNumber);
this.stagedEvents.set(sequenceNumber, domainEvent);
// Call the lifecycle method onStage if it exists.
domainEvent.onStage?.();
}
}
/**
* Clears the staged domain events.
*/
clearStagedDomainEvents() {
this.stagedEvents.clear();
}
validateCommandContext() {
if (!this[IsInProcessContext]) {
throw new MutateEventOutsideCommandContextError();
}
}
validateCreationContext() {
if (!this[IsInCreationContext]) {
throw new AggregateIdSetOutsideCreationContextError();
}
}
}
_a = IsInProcessContext, _b = IsInCreationContext;
__decorate([
Type(() => Map),
__metadata("design:type", Object)
], AbstractAggregateRoot.prototype, "stagedEvents", void 0);