@nestjs/microservices
Version:
Nest - modern, fast, powerful node.js web framework (@microservices)
47 lines (46 loc) • 2.04 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.ListenerMetadataExplorer = void 0;
const shared_utils_1 = require("@nestjs/common/utils/shared.utils");
const constants_1 = require("./constants");
const pattern_handler_enum_1 = require("./enums/pattern-handler.enum");
class ListenerMetadataExplorer {
constructor(metadataScanner) {
this.metadataScanner = metadataScanner;
}
explore(instance) {
const instancePrototype = Object.getPrototypeOf(instance);
return this.metadataScanner.scanFromPrototype(instance, instancePrototype, method => this.exploreMethodMetadata(instancePrototype, method));
}
exploreMethodMetadata(instancePrototype, methodKey) {
const targetCallback = instancePrototype[methodKey];
const handlerType = Reflect.getMetadata(constants_1.PATTERN_HANDLER_METADATA, targetCallback);
if (shared_utils_1.isUndefined(handlerType)) {
return;
}
const pattern = Reflect.getMetadata(constants_1.PATTERN_METADATA, targetCallback);
const transport = Reflect.getMetadata(constants_1.TRANSPORT_METADATA, targetCallback);
return {
methodKey,
targetCallback,
pattern,
transport,
isEventHandler: handlerType === pattern_handler_enum_1.PatternHandler.EVENT,
};
}
*scanForClientHooks(instance) {
for (const propertyKey in instance) {
if (shared_utils_1.isFunction(propertyKey)) {
continue;
}
const property = String(propertyKey);
const isClient = Reflect.getMetadata(constants_1.CLIENT_METADATA, instance, property);
if (shared_utils_1.isUndefined(isClient)) {
continue;
}
const metadata = Reflect.getMetadata(constants_1.CLIENT_CONFIGURATION_METADATA, instance, property);
yield { property, metadata };
}
}
}
exports.ListenerMetadataExplorer = ListenerMetadataExplorer;