nestjs-typed-events/dist/module.js

Typesafe NestJS event emitter module

"use strict";
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 __param = (this && this.__param) || function (paramIndex, decorator) {
    return function (target, key) { decorator(target, key, paramIndex); }
};
var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    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) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var EventEmitterModule_1;
Object.defineProperty(exports, "__esModule", { value: true });
exports.EventEmitterModule = void 0;
const nestjs_discovery_1 = require("@golevelup/nestjs-discovery");
const common_1 = require("@nestjs/common");
const decorator_1 = require("./decorator");
const eventemitter2_1 = require("eventemitter2");
const nestjs_modules_1 = require("@golevelup/nestjs-modules");
const emitter_1 = require("./emitter");
const MODULE_OPTIONS = 'TypeEventEmitter.options';
let EventEmitterModule = EventEmitterModule_1 = class EventEmitterModule extends (0, nestjs_modules_1.createConfigurableDynamicRootModule)(MODULE_OPTIONS) {
    constructor(discover, options, emitter) {
        super();
        this.discover = discover;
        this.options = options;
        this.emitter = emitter;
        this.logger = new common_1.Logger(EventEmitterModule_1.name);
    }
    onModuleInit() {
        return __awaiter(this, void 0, void 0, function* () {
            const contractEvents = Object.entries(this.options.contract)
                .filter(([_, value]) => !value.optional)
                .map(([key]) => key);
            const providers = yield this.discover.providersWithMetaAtKey(decorator_1.EVENT_LISTENER);
            this.ensureEachEventHasListener(contractEvents, providers);
            for (const provider of providers) {
                const instance = provider.discoveredClass
                    .instance;
                const { event, options } = provider.meta;
                this.emitter.on(event, (e) => __awaiter(this, void 0, void 0, function* () {
                    yield instance.handle(options.schema.parse(e));
                }));
                this.logger.log(`${provider.discoveredClass.name} {${event}}`);
            }
        });
    }
    ensureEachEventHasListener(events, providers) {
        for (const event of events) {
            const provider = providers.find((p) => p.meta.event === event);
            if (!provider) {
                throw new Error(`Required event ${event} does not have a registered handler`);
            }
        }
    }
};
EventEmitterModule = EventEmitterModule_1 = __decorate([
    (0, common_1.Module)({
        imports: [nestjs_discovery_1.DiscoveryModule],
        providers: [
            {
                provide: eventemitter2_1.EventEmitter2,
                useFactory: (options) => {
                    return new eventemitter2_1.EventEmitter2(options.emitter);
                },
                inject: [MODULE_OPTIONS],
            },
            {
                provide: emitter_1.TypedEventEmitter,
                useFactory: (emitter) => {
                    return new emitter_1.TypedEventEmitter(emitter);
                },
                inject: [eventemitter2_1.EventEmitter2],
            },
        ],
        exports: [emitter_1.TypedEventEmitter],
    }),
    __param(1, (0, common_1.Inject)(MODULE_OPTIONS)),
    __metadata("design:paramtypes", [nestjs_discovery_1.DiscoveryService, Object, eventemitter2_1.EventEmitter2])
], EventEmitterModule);
exports.EventEmitterModule = EventEmitterModule;
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