@tsclean/core
Version:
Plugin for API Rest Full development, based on Clean Architecture, IoC and Dependency Injection.
135 lines • 23.2 kB
JavaScript
;
Object.defineProperty(exports, "__esModule", { value: true });
exports.WebSocketsController = void 0;
const rxjs_1 = require("rxjs");
const services_1 = require("../services");
const gateway_metadata_explorer_1 = require("./gateway-metadata-explorer");
const app_1 = require("../app");
const helpers_1 = require("../helpers");
const invalid_socket_port_exception_1 = require("./errors/invalid-socket-port.exception");
const compare_element_util_1 = require("./utils/compare-element.util");
class WebSocketsController {
constructor(socketServerProvider, config, contextCreator, graphInspector, appOptions = {}) {
this.socketServerProvider = socketServerProvider;
this.config = config;
this.contextCreator = contextCreator;
this.graphInspector = graphInspector;
this.appOptions = appOptions;
this.logger = new services_1.Logger(WebSocketsController.name, {
timestamp: true
});
this.metadataExplorer = new gateway_metadata_explorer_1.GatewayMetadataExplorer(new app_1.MetadataScanner());
}
connectGatewayToServer(instance, metatype, moduleKey, instanceWrapperId) {
const options = Reflect.getMetadata(helpers_1.GATEWAY_OPTIONS, metatype) || {};
const port = Reflect.getMetadata(helpers_1.PORT_METADATA, metatype) || 0;
if (!Number.isInteger(port)) {
throw new invalid_socket_port_exception_1.InvalidSocketPortException(port, metatype);
}
this.subscribeToServerEvents(instance, options, port, moduleKey, instanceWrapperId);
}
subscribeToServerEvents(instance, options, port, moduleKey, instanceWrapperId) {
const nativeMessageHandlers = this.metadataExplorer.explore(instance);
const messageHandlers = nativeMessageHandlers.map(({ callback, message, methodName }) => ({
message,
methodName,
callback: this.contextCreator.create(instance, callback, moduleKey, methodName)
}));
this.inspectEntrypointDefinitions(instance, port, messageHandlers, instanceWrapperId);
if (this.appOptions.preview) {
return;
}
const observableServer = this.socketServerProvider.scanForSocketServer(options, port);
this.assignServerToProperties(instance, observableServer.server);
this.subscribeEvents(instance, messageHandlers, observableServer);
}
subscribeEvents(instance, subscribersMap, observableServer) {
const { init, disconnect, connection, server } = observableServer;
const adapter = this.config.getIoAdapter();
this.subscribeInitEvent(instance, init);
this.subscribeConnectionEvent(instance, connection);
this.subscribeDisconnectEvent(instance, disconnect);
const handler = this.getConnectionHandler(this, instance, subscribersMap, disconnect, connection);
adapter.bindClientConnect(server, handler);
this.printSubscriptionLogs(instance, subscribersMap);
}
getConnectionHandler(context, instance, subscribersMap, disconnect, connection) {
const adapter = this.config.getIoAdapter();
return (...args) => {
const [client] = args;
connection.next(args);
context.subscribeMessages(subscribersMap, client, instance);
const disconnectHook = adapter.bindClientDisconnect;
disconnectHook &&
disconnectHook.call(adapter, client, () => disconnect.next(client));
};
}
subscribeInitEvent(instance, event) {
if (instance.afterInit) {
event.subscribe(instance.afterInit.bind(instance));
}
}
subscribeConnectionEvent(instance, event) {
if (instance.handleConnection) {
event
.pipe((0, rxjs_1.distinctUntilChanged)((prev, curr) => (0, compare_element_util_1.compareElementAt)(prev, curr, 0)))
.subscribe((args) => instance.handleConnection(...args));
}
}
subscribeDisconnectEvent(instance, event) {
if (instance.handleDisconnect) {
event
.pipe((0, rxjs_1.distinctUntilChanged)())
.subscribe(instance.handleDisconnect.bind(instance));
}
}
subscribeMessages(subscribersMap, client, instance) {
const adapter = this.config.getIoAdapter();
const handlers = subscribersMap.map(({ callback, message }) => ({
message,
callback: callback.bind(instance, client)
}));
adapter.bindMessageHandlers(client, handlers, data => (0, rxjs_1.from)(this.pickResult(data)).pipe((0, rxjs_1.mergeAll)()));
}
async pickResult(deferredResult) {
const result = await deferredResult;
if ((0, rxjs_1.isObservable)(result)) {
return result;
}
if (result instanceof Promise) {
return (0, rxjs_1.from)(result);
}
return (0, rxjs_1.of)(result);
}
inspectEntrypointDefinitions(instance, port, messageHandlers, instanceWrapperId) {
messageHandlers.forEach(handler => {
var _a;
this.graphInspector.insertEntrypointDefinition({
type: 'websocket',
methodName: handler.methodName,
className: (_a = instance.constructor) === null || _a === void 0 ? void 0 : _a.name,
classNodeId: instanceWrapperId,
metadata: {
port,
key: handler.message,
message: handler.message
}
}, instanceWrapperId);
});
}
assignServerToProperties(instance, server) {
for (const propertyKey of this.metadataExplorer.scanForServerHooks(instance)) {
Reflect.set(instance, propertyKey, server);
}
}
printSubscriptionLogs(instance, subscribersMap) {
var _a;
const gatewayClassName = (_a = instance === null || instance === void 0 ? void 0 : instance.constructor) === null || _a === void 0 ? void 0 : _a.name;
if (!gatewayClassName) {
return;
}
subscribersMap.forEach(({ message }) => this.logger.log(`${gatewayClassName} subscribed to the "${message}" message`));
}
}
exports.WebSocketsController = WebSocketsController;
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{\n  distinctUntilChanged,\n  isObservable,\n  mergeAll,\n  Observable,\n  of,\n  Subject,\n  from as fromPromise\n} from 'rxjs'\nimport { Logger } from '../services'\nimport {\n  GatewayMetadataExplorer,\n  MessageMappingProperties\n} from './gateway-metadata-explorer'\nimport { ApplicationConfig, MetadataScanner } from '../app'\nimport { SocketServerProvider } from './socket-server-provider'\nimport { WsContextCreator } from './context/ws-context-creator'\nimport {\n  ApplicationContextOptionsInterface,\n  CleanGateway,\n  Type\n} from '../contracts'\nimport { GATEWAY_OPTIONS, PORT_METADATA } from '../helpers'\nimport { InvalidSocketPortException } from './errors/invalid-socket-port.exception'\nimport { GatewayMetadata } from '../contracts/gateway-metadata'\nimport { ServerAndEventStreamsHost } from '../contracts/server-and-event-streams-host'\nimport { compareElementAt } from './utils/compare-element.util'\nimport { WebsocketEntrypointMetadata } from '../contracts/websockets-entrypoint-metadata'\nimport { GraphInspector } from '../inspector/graph-inspector'\n\nexport class WebSocketsController {\n  private readonly logger = new Logger(WebSocketsController.name, {\n    timestamp: true\n  })\n  private readonly metadataExplorer = new GatewayMetadataExplorer(\n    new MetadataScanner()\n  )\n\n  constructor (\n    private readonly socketServerProvider: SocketServerProvider,\n    private readonly config: ApplicationConfig,\n    private readonly contextCreator: WsContextCreator,\n    private readonly graphInspector: GraphInspector,\n    private readonly appOptions: ApplicationContextOptionsInterface = {}\n  ) {}\n\n  public connectGatewayToServer (\n    instance: CleanGateway,\n    metatype: Type<unknown> | Function,\n    moduleKey: string,\n    instanceWrapperId: string\n  ) {\n    const options = Reflect.getMetadata(GATEWAY_OPTIONS, metatype) || {}\n    const port = Reflect.getMetadata(PORT_METADATA, metatype) || 0\n\n    if (!Number.isInteger(port)) {\n      throw new InvalidSocketPortException(port, metatype)\n    }\n    this.subscribeToServerEvents(\n      instance,\n      options,\n      port,\n      moduleKey,\n      instanceWrapperId\n    )\n  }\n\n  public subscribeToServerEvents<T extends GatewayMetadata> (\n    instance: CleanGateway,\n    options: T,\n    port: number,\n    moduleKey: string,\n    instanceWrapperId: string\n  ) {\n    const nativeMessageHandlers = this.metadataExplorer.explore(instance)\n    const messageHandlers = nativeMessageHandlers.map(\n      ({ callback, message, methodName }) => ({\n        message,\n        methodName,\n        callback: this.contextCreator.create(\n          instance,\n          callback,\n          moduleKey,\n          methodName\n        )\n      })\n    )\n\n    this.inspectEntrypointDefinitions(\n      instance,\n      port,\n      messageHandlers,\n      instanceWrapperId\n    )\n\n    if (this.appOptions.preview) {\n      return\n    }\n    const observableServer = this.socketServerProvider.scanForSocketServer<T>(\n      options,\n      port\n    )\n    this.assignServerToProperties(instance, observableServer.server)\n    this.subscribeEvents(instance, messageHandlers, observableServer)\n  }\n\n  public subscribeEvents (\n    instance: CleanGateway,\n    subscribersMap: MessageMappingProperties[],\n    observableServer: ServerAndEventStreamsHost\n  ) {\n    const { init, disconnect, connection, server } = observableServer\n    const adapter = this.config.getIoAdapter()\n\n    this.subscribeInitEvent(instance, init)\n    this.subscribeConnectionEvent(instance, connection)\n    this.subscribeDisconnectEvent(instance, disconnect)\n\n    const handler = this.getConnectionHandler(\n      this,\n      instance,\n      subscribersMap,\n      disconnect,\n      connection\n    )\n    adapter.bindClientConnect(server, handler)\n    this.printSubscriptionLogs(instance, subscribersMap)\n  }\n\n  public getConnectionHandler (\n    context: WebSocketsController,\n    instance: CleanGateway,\n    subscribersMap: MessageMappingProperties[],\n    disconnect: Subject<any>,\n    connection: Subject<any>\n  ) {\n    const adapter = this.config.getIoAdapter()\n    return (...args: unknown[]) => {\n      const [client] = args\n      connection.next(args)\n      context.subscribeMessages(subscribersMap, client, instance)\n\n      const disconnectHook = adapter.bindClientDisconnect\n      disconnectHook &&\n        disconnectHook.call(adapter, client, () => disconnect.next(client))\n    }\n  }\n\n  public subscribeInitEvent (instance: CleanGateway, event: Subject<any>) {\n    if (instance.afterInit) {\n      event.subscribe(instance.afterInit.bind(instance))\n    }\n  }\n\n  public subscribeConnectionEvent (instance: CleanGateway, event: Subject<any>) {\n    if (instance.handleConnection) {\n      event\n        .pipe(\n          distinctUntilChanged((prev, curr) => compareElementAt(prev, curr, 0))\n        )\n        .subscribe((args: unknown[]) => instance.handleConnection(...args))\n    }\n  }\n\n  public subscribeDisconnectEvent (instance: CleanGateway, event: Subject<any>) {\n    if (instance.handleDisconnect) {\n      event\n        .pipe(distinctUntilChanged())\n        .subscribe(instance.handleDisconnect.bind(instance))\n    }\n  }\n\n  public subscribeMessages<T = any> (\n    subscribersMap: MessageMappingProperties[],\n    client: T,\n    instance: CleanGateway\n  ) {\n    const adapter = this.config.getIoAdapter()\n    const handlers = subscribersMap.map(({ callback, message }) => ({\n      message,\n      callback: callback.bind(instance, client)\n    }))\n    adapter.bindMessageHandlers(client, handlers, data =>\n      fromPromise(this.pickResult(data)).pipe(mergeAll())\n    )\n  }\n\n  public async pickResult (\n    deferredResult: Promise<any>\n  ): Promise<Observable<any>> {\n    const result = await deferredResult\n    if (isObservable(result)) {\n      return result\n    }\n    if (result instanceof Promise) {\n      return fromPromise(result)\n    }\n    return of(result)\n  }\n\n  public inspectEntrypointDefinitions (\n    instance: CleanGateway,\n    port: number,\n    messageHandlers: MessageMappingProperties[],\n    instanceWrapperId: string\n  ) {\n    messageHandlers.forEach(handler => {\n      this.graphInspector.insertEntrypointDefinition<WebsocketEntrypointMetadata>(\n        {\n          type: 'websocket',\n          methodName: handler.methodName,\n          className: instance.constructor?.name,\n          classNodeId: instanceWrapperId,\n          metadata: {\n            port,\n            key: handler.message,\n            message: handler.message\n          }\n        },\n        instanceWrapperId\n      )\n    })\n  }\n\n  private assignServerToProperties<T = any> (\n    instance: CleanGateway,\n    server: object\n  ) {\n    for (const propertyKey of this.metadataExplorer.scanForServerHooks(\n      instance\n    )) {\n      Reflect.set(instance, propertyKey, server)\n    }\n  }\n\n  private printSubscriptionLogs (\n    instance: CleanGateway,\n    subscribersMap: MessageMappingProperties[]\n  ) {\n    const gatewayClassName = (instance as Object)?.constructor?.name\n    if (!gatewayClassName) {\n      return\n    }\n    subscribersMap.forEach(({ message }) =>\n      this.logger.log(\n        `${gatewayClassName} subscribed to the \"${message}\" message`\n      )\n    )\n  }\n}\n"]}