| 1 | 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{EntitySubscriberInterface} from \"./EntitySubscriberInterface\";\nimport {ObjectLiteral} from \"../common/ObjectLiteral\";\nimport {QueryRunner} from \"../query-runner/QueryRunner\";\nimport {EntityMetadata} from \"../metadata/EntityMetadata\";\nimport {BroadcasterResult} from \"./BroadcasterResult\";\nimport {ColumnMetadata} from \"../metadata/ColumnMetadata\";\nimport {RelationMetadata} from \"../metadata/RelationMetadata\";\n\n/**\n * Broadcaster provides a helper methods to broadcast events to the subscribers.\n */\nexport class Broadcaster {\n\n // -------------------------------------------------------------------------\n // Constructor\n // -------------------------------------------------------------------------\n\n constructor(private queryRunner: QueryRunner) {\n }\n\n // -------------------------------------------------------------------------\n // Public Methods\n // -------------------------------------------------------------------------\n\n /**\n * Broadcasts \"BEFORE_INSERT\" event.\n * Before insert event is executed before entity is being inserted to the database for the first time.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastBeforeInsertEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral): void {\n\n if (entity && metadata.beforeInsertListeners.length) {\n metadata.beforeInsertListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.beforeInsert) {\n const executionResult = subscriber.beforeInsert({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"BEFORE_UPDATE\" event.\n * Before update event is executed before entity is being updated in the database.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastBeforeUpdateEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral, databaseEntity?: ObjectLiteral, updatedColumns?: ColumnMetadata[], updatedRelations?: RelationMetadata[]): void { // todo: send relations too?\n if (entity && metadata.beforeUpdateListeners.length) {\n metadata.beforeUpdateListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.beforeUpdate) {\n const executionResult = subscriber.beforeUpdate({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata,\n databaseEntity: databaseEntity,\n updatedColumns: updatedColumns || [],\n updatedRelations: updatedRelations || []\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"BEFORE_REMOVE\" event.\n * Before remove event is executed before entity is being removed from the database.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastBeforeRemoveEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral, databaseEntity?: ObjectLiteral): void {\n if (entity && metadata.beforeRemoveListeners.length) {\n metadata.beforeRemoveListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.beforeRemove) {\n const executionResult = subscriber.beforeRemove({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata,\n databaseEntity: databaseEntity,\n entityId: metadata.getEntityIdMixedMap(databaseEntity)\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"AFTER_INSERT\" event.\n * After insert event is executed after entity is being persisted to the database for the first time.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastAfterInsertEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral): void {\n\n if (entity && metadata.afterInsertListeners.length) {\n metadata.afterInsertListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.afterInsert) {\n const executionResult = subscriber.afterInsert({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"AFTER_UPDATE\" event.\n * After update event is executed after entity is being updated in the database.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastAfterUpdateEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral, databaseEntity?: ObjectLiteral, updatedColumns?: ColumnMetadata[], updatedRelations?: RelationMetadata[]): void {\n\n if (entity && metadata.afterUpdateListeners.length) {\n metadata.afterUpdateListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.afterUpdate) {\n const executionResult = subscriber.afterUpdate({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata,\n databaseEntity: databaseEntity,\n updatedColumns: updatedColumns || [],\n updatedRelations: updatedRelations || []\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"AFTER_REMOVE\" event.\n * After remove event is executed after entity is being removed from the database.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastAfterRemoveEvent(result: BroadcasterResult, metadata: EntityMetadata, entity?: ObjectLiteral, databaseEntity?: ObjectLiteral): void {\n\n if (entity && metadata.afterRemoveListeners.length) {\n metadata.afterRemoveListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.afterRemove) {\n const executionResult = subscriber.afterRemove({\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata,\n databaseEntity: databaseEntity,\n entityId: metadata.getEntityIdMixedMap(databaseEntity)\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n }\n\n /**\n * Broadcasts \"AFTER_LOAD\" event for all given entities, and their sub-entities.\n * After load event is executed after entity has been loaded from the database.\n * All subscribers and entity listeners who listened to this event will be executed at this point.\n * Subscribers and entity listeners can return promises, it will wait until they are resolved.\n *\n * Note: this method has a performance-optimized code organization, do not change code structure.\n */\n broadcastLoadEventsForAll(result: BroadcasterResult, metadata: EntityMetadata, entities: ObjectLiteral[]): void {\n entities.forEach(entity => {\n if (entity instanceof Promise) // todo: check why need this?\n return;\n\n // collect load events for all children entities that were loaded with the main entity\n if (metadata.relations.length) {\n metadata.relations.forEach(relation => {\n\n // in lazy relations we cannot simply access to entity property because it will cause a getter and a database query\n if (relation.isLazy && !entity.hasOwnProperty(relation.propertyName))\n return;\n\n const value = relation.getEntityValue(entity);\n if (value instanceof Object)\n this.broadcastLoadEventsForAll(result, relation.inverseEntityMetadata, value instanceof Array ? value : [value]);\n });\n }\n\n if (metadata.afterLoadListeners.length) {\n metadata.afterLoadListeners.forEach(listener => {\n if (listener.isAllowed(entity)) {\n const executionResult = listener.execute(entity);\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n\n if (this.queryRunner.connection.subscribers.length) {\n this.queryRunner.connection.subscribers.forEach(subscriber => {\n if (this.isAllowedSubscriber(subscriber, metadata.target) && subscriber.afterLoad) {\n const executionResult = subscriber.afterLoad!(entity, {\n connection: this.queryRunner.connection,\n queryRunner: this.queryRunner,\n manager: this.queryRunner.manager,\n entity: entity,\n metadata: metadata\n });\n if (executionResult instanceof Promise)\n result.promises.push(executionResult);\n result.count++;\n }\n });\n }\n });\n }\n\n // -------------------------------------------------------------------------\n // Protected Methods\n // -------------------------------------------------------------------------\n\n /**\n * Checks if subscriber's methods can be executed by checking if its don't listen to the particular entity,\n * or listens our entity.\n */\n protected isAllowedSubscriber(subscriber: EntitySubscriberInterface<any>, target: Function|string): boolean {\n return !subscriber.listenTo ||\n !subscriber.listenTo() ||\n subscriber.listenTo() === Object ||\n subscriber.listenTo() === target ||\n subscriber.listenTo().isPrototypeOf(target);\n }\n\n}"],"sourceRoot":".."} |