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socket-module.ts
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socket-module.ts
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import { InjectionToken } from '@nestjs/common/interfaces';
import { Injectable } from '@nestjs/common/interfaces/injectable.interface';
import { NestApplicationContextOptions } from '@nestjs/common/interfaces/nest-application-context-options.interface';
import { ApplicationConfig } from '@nestjs/core/application-config';
import { GuardsConsumer } from '@nestjs/core/guards/guards-consumer';
import { GuardsContextCreator } from '@nestjs/core/guards/guards-context-creator';
import { loadAdapter } from '@nestjs/core/helpers/load-adapter';
import { NestContainer } from '@nestjs/core/injector/container';
import { InstanceWrapper } from '@nestjs/core/injector/instance-wrapper';
import { GraphInspector } from '@nestjs/core/inspector/graph-inspector';
import { InterceptorsConsumer } from '@nestjs/core/interceptors/interceptors-consumer';
import { InterceptorsContextCreator } from '@nestjs/core/interceptors/interceptors-context-creator';
import { PipesConsumer } from '@nestjs/core/pipes/pipes-consumer';
import { PipesContextCreator } from '@nestjs/core/pipes/pipes-context-creator';
import { iterate } from 'iterare';
import { AbstractWsAdapter } from './adapters';
import { GATEWAY_METADATA } from './constants';
import { ExceptionFiltersContext } from './context/exception-filters-context';
import { WsContextCreator } from './context/ws-context-creator';
import { WsProxy } from './context/ws-proxy';
import { NestGateway } from './interfaces/nest-gateway.interface';
import { SocketServerProvider } from './socket-server-provider';
import { SocketsContainer } from './sockets-container';
import { WebSocketsController } from './web-sockets-controller';
export class SocketModule<
THttpServer = any,
TAppOptions extends
NestApplicationContextOptions = NestApplicationContextOptions,
> {
private readonly socketsContainer = new SocketsContainer();
private applicationConfig: ApplicationConfig;
private webSocketsController: WebSocketsController;
private isAdapterInitialized: boolean;
private httpServer: THttpServer | undefined;
private appOptions: TAppOptions;
public register(
container: NestContainer,
applicationConfig: ApplicationConfig,
graphInspector: GraphInspector,
appOptions: TAppOptions,
httpServer?: THttpServer,
) {
this.applicationConfig = applicationConfig;
this.appOptions = appOptions;
this.httpServer = httpServer;
const contextCreator = this.getContextCreator(container);
const serverProvider = new SocketServerProvider(
this.socketsContainer,
applicationConfig,
);
this.webSocketsController = new WebSocketsController(
serverProvider,
applicationConfig,
contextCreator,
graphInspector,
this.appOptions,
);
const modules = container.getModules();
modules.forEach(({ providers }, moduleName: string) =>
this.connectAllGateways(providers, moduleName),
);
}
public connectAllGateways(
providers: Map<InjectionToken, InstanceWrapper<Injectable>>,
moduleName: string,
) {
iterate(providers.values())
.filter(wrapper => wrapper && !wrapper.isNotMetatype)
.forEach(wrapper => this.connectGatewayToServer(wrapper, moduleName));
}
public connectGatewayToServer(
wrapper: InstanceWrapper<Injectable>,
moduleName: string,
) {
const { instance, metatype } = wrapper;
const metadataKeys = Reflect.getMetadataKeys(metatype);
if (!metadataKeys.includes(GATEWAY_METADATA)) {
return;
}
if (!this.isAdapterInitialized) {
this.initializeAdapter();
}
this.webSocketsController.connectGatewayToServer(
instance as NestGateway,
metatype,
moduleName,
wrapper.id,
);
}
public async close(): Promise<any> {
if (!this.applicationConfig) {
return;
}
const adapter = this.applicationConfig.getIoAdapter();
if (!adapter) {
return;
}
const servers = this.socketsContainer.getAll();
await Promise.all(
iterate(servers.values())
.filter(({ server }) => server)
.map(async ({ server }) => adapter.close(server)),
);
await (adapter as AbstractWsAdapter)?.dispose();
this.socketsContainer.clear();
}
private initializeAdapter() {
const adapter = this.applicationConfig.getIoAdapter();
if (adapter) {
this.isAdapterInitialized = true;
return;
}
const { IoAdapter } = loadAdapter(
'@nestjs/platform-socket.io',
'WebSockets',
() => require('@nestjs/platform-socket.io'),
);
const ioAdapter = new IoAdapter(this.httpServer);
this.applicationConfig.setIoAdapter(ioAdapter);
this.isAdapterInitialized = true;
}
private getContextCreator(container: NestContainer): WsContextCreator {
return new WsContextCreator(
new WsProxy(),
new ExceptionFiltersContext(container),
new PipesContextCreator(container),
new PipesConsumer(),
new GuardsContextCreator(container),
new GuardsConsumer(),
new InterceptorsContextCreator(container),
new InterceptorsConsumer(),
);
}
}