ionic-orm-2
Version:
Data-mapper ORM for Ionic WebSQL and SQLite
191 lines • 11.3 kB
JavaScript
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
return new (P || (P = Promise))(function (resolve, reject) {
function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
step((generator = generator.apply(thisArg, _arguments || [])).next());
});
};
import { EventListenerTypes } from "../metadata/types/EventListenerTypes";
/**
* Broadcaster provides a helper methods to broadcast events to the subscribers.
*/
export class Broadcaster {
// -------------------------------------------------------------------------
// Constructor
// -------------------------------------------------------------------------
constructor(entityMetadatas, subscriberMetadatas, entityListeners) {
this.entityMetadatas = entityMetadatas;
this.subscriberMetadatas = subscriberMetadatas;
this.entityListeners = entityListeners;
}
// -------------------------------------------------------------------------
// Public Methods
// -------------------------------------------------------------------------
/**
* Broadcasts "BEFORE_INSERT" event.
* Before insert event is executed before entity is being inserted to the database for the first time.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastBeforeInsertEvent(entity) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.BEFORE_INSERT && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.beforeInsert)
.map(subscriber => subscriber.beforeInsert({ entity: entity }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "BEFORE_UPDATE" event.
* Before update event is executed before entity is being updated in the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastBeforeUpdateEvent(entity, updatedColumns) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.BEFORE_UPDATE && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.beforeUpdate)
.map(subscriber => subscriber.beforeUpdate({ entity: entity, updatedColumns: updatedColumns }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "BEFORE_REMOVE" event.
* Before remove event is executed before entity is being removed from the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastBeforeRemoveEvent(entity, entityId) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.BEFORE_REMOVE && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.beforeRemove)
.map(subscriber => subscriber.beforeRemove({ entity: entity, entityId: entityId }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "AFTER_INSERT" event.
* After insert event is executed after entity is being persisted to the database for the first time.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastAfterInsertEvent(entity) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.AFTER_INSERT && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.afterInsert)
.map(subscriber => subscriber.afterInsert({ entity: entity }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "AFTER_UPDATE" event.
* After update event is executed after entity is being updated in the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastAfterUpdateEvent(entity, updatedColumns) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.AFTER_UPDATE && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.afterUpdate)
.map(subscriber => subscriber.afterUpdate({ entity: entity, updatedColumns: updatedColumns }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "AFTER_REMOVE" event.
* After remove event is executed after entity is being removed from the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastAfterRemoveEvent(entity, entityId) {
return __awaiter(this, void 0, void 0, function* () {
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.AFTER_REMOVE && this.isAllowedListener(listener, entity))
.map(entityListener => entity[entityListener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.afterRemove)
.map(subscriber => subscriber.afterRemove({ entity: entity, entityId: entityId }));
yield Promise.all(listeners.concat(subscribers));
});
}
/**
* Broadcasts "AFTER_LOAD" event for all given entities, and their sub-entities.
* After load event is executed after entity has been loaded from the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastLoadEventsForAll(target, entities) {
return __awaiter(this, void 0, void 0, function* () {
yield Promise.all(entities.map(entity => this.broadcastLoadEvents(target, entity)));
});
}
/**
* Broadcasts "AFTER_LOAD" event for the given entity and all its sub-entities.
* After load event is executed after entity has been loaded from the database.
* All subscribers and entity listeners who listened to this event will be executed at this point.
* Subscribers and entity listeners can return promises, it will wait until they are resolved.
*/
broadcastLoadEvents(target, entity) {
return __awaiter(this, void 0, void 0, function* () {
if (entity instanceof Promise)
return;
// collect load events for all children entities that were loaded with the main entity
const children = this.entityMetadatas.findByTarget(target).relations.reduce((promises, relation) => {
if (!entity.hasOwnProperty(relation.propertyName))
return promises;
const value = relation.getEntityValue(entity);
if (value instanceof Array) {
promises = promises.concat(this.broadcastLoadEventsForAll(relation.inverseEntityMetadata.target, value));
}
else if (value) {
promises.push(this.broadcastLoadEvents(relation.inverseEntityMetadata.target, value));
}
return promises;
}, []);
const listeners = this.entityListeners
.filter(listener => listener.type === EventListenerTypes.AFTER_LOAD && this.isAllowedListener(listener, entity))
.map(listener => entity[listener.propertyName]());
const subscribers = this.subscriberMetadatas
.filter(subscriber => this.isAllowedSubscriber(subscriber, entity) && subscriber.afterLoad)
.map(subscriber => subscriber.afterLoad(entity));
yield Promise.all(children.concat(listeners.concat(subscribers)));
});
}
// -------------------------------------------------------------------------
// Protected Methods
// -------------------------------------------------------------------------
/**
* Checks if entity listener is allowed to be executed on the given entity.
*/
isAllowedListener(listener, entity) {
return listener.target === entity.constructor ||
(listener.target instanceof Function && entity.constructor.prototype instanceof listener.target); // todo: also need to implement entity schema inheritance
}
/**
* Checks if subscriber's methods can be executed by checking if its don't listen to the particular entity,
* or listens our entity.
*/
isAllowedSubscriber(subscriber, entity) {
return !subscriber.listenTo ||
!subscriber.listenTo() ||
subscriber.listenTo() === Object ||
subscriber.listenTo() === entity.constructor;
}
}
//# sourceMappingURL=Broadcaster.js.map