213 lines
5.8 KiB
TypeScript
213 lines
5.8 KiB
TypeScript
/**
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* @author Martin Karkowski
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* @email m.karkowski@zema.de
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* @create date 2020-11-06 08:52:42
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* @modify date 2020-11-12 13:26:43
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* @desc [description]
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*/
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import { EventEmitter } from "events";
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import { Server } from "http";
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import * as io from "socket.io";
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import { Logger } from "winston";
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import { getNopeLogger } from "../logger/getLogger";
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import { NopeObservable } from "../observables/nopeObservable";
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import { IAvailableInstanceGeneratorsMsg, IAvailableServicesMsg, IAvailableTopicsMsg, ICommunicationInterface, IExternalEventMsg, IRequestTaskMsg, IResponseTaskMsg, ITaskCancelationMsg } from "../types/nope/nopeCommunication.interface";
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import { INopeObservable } from "../types/nope/nopeObservable.interface";
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/**
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* Wrapper Interface.
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* Creates an Interface for a Socket server
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*/
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export class IoSocketSeverEventEmitter {
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connected: INopeObservable<boolean>;
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protected _socket: io.Server
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protected _sockets: Set<io.Socket>;
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protected _funcs: Map<string, (...args: any[]) => void>;
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protected _logger: Logger;
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protected _internalEmitter: EventEmitter;
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/**
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* Creates an instance of IoSocketServer.
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* @param {number} port The Port, on which the Server should be hosted
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* @param {Server} [server] A Server shich should be used. (Otherwise a Server is created)
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* @memberof IoSocketServer
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*/
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constructor(public port: number, server?: Server) {
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if (server) {
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this._socket = (io as any)(server);
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} else {
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this._socket = (io as any)();
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}
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this._internalEmitter = new EventEmitter();
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this.connected = new NopeObservable();
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this.connected.setContent(false);
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this._logger = getNopeLogger("io-socket-server");
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this._logger.info("waiting for connection. Listening on port: " + port.toString());
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this._socket.listen(port);
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const _this = this;
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this._socket.on("connection", (client) => {
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_this._logger.debug("New Connection established: " + client.id);
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// Add the Elements to the Client
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_this._sockets.add(client);
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// Subscribe to Loosing connection:
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client.on("disconnect", () => {
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_this._logger.debug("Connection of : " + client.id + " lost.");
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_this._sockets.delete(client);
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if (_this._sockets.size === 0) {
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_this.connected.setContent(false);
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_this._logger.warn("All Connections lost");
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}
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});
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for (const [id, _func] of _this._funcs) {
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// Subscribe to the Events:
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client.on(id, (...args) => {
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_this._logger.debug("received content: ", ...args);
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// Forward the Message.
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_func(...args);
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});
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}
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_this.connected.setContent(true);
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});
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this._sockets = new Set();
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this._funcs = new Map<string, (...args: any[]) => void>();
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}
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off(event: string, cb: (...args: any[]) => void) {
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// Remove the Subscription from the Socket.
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for (const socket of this._sockets) {
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socket.off(event, cb);
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}
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// Remove the Function.
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this._funcs.delete(event);
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}
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on(event: string, cb: (...args: any[]) => void) {
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// Add the Subscription to the Sockets.
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for (const socket of this._sockets) {
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socket.on(event, cb);
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}
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// Store the Function
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this._funcs.set(event, cb);
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this._internalEmitter.on(event, cb);
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}
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emit(event: string, data: any): void {
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if (this._logger.isDebugEnabled()) {
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this._logger.debug("sending data on: " + event);
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}
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this._socket.emit(event, data);
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this._internalEmitter.emit(event, data);
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}
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}
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/**
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* Communication Layer using IO-Sockets.
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*
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* @export
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* @class IoSocketServer
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* @implements {ICommunicationInterface}
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*/
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export class IoSocketServer extends IoSocketSeverEventEmitter implements ICommunicationInterface {
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async onTaskCancelation(cb: (msg: ITaskCancelationMsg) => void) {
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this.on("cancel", cb);
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}
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async emitTaskCancelation(msg: ITaskCancelationMsg) {
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this.emit("cancel", msg);
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}
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async onAurevoir(cb: (dispatcher: string) => void) {
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this.on("aurevoir", cb);
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}
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async emitAurevoir(dispatcher: string) {
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this.emit("aurevoir", dispatcher);
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}
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async emitNewInstanceGeneratorsAvailable(generators: IAvailableInstanceGeneratorsMsg) {
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this.emit("generators", generators);
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}
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async onNewInstanceGeneratorsAvailable(cb: (generators: IAvailableInstanceGeneratorsMsg) => void) {
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this.on("generators", cb);
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}
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async emitRpcRequest(name: string, request: IRequestTaskMsg) {
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this.emit(name, request);
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}
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async emitRpcResult(name: string, result: IResponseTaskMsg) {
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this.emit(name, result);
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}
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async onRpcResult(name: string, cb: (result: IResponseTaskMsg) => void) {
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this.on(name, cb);
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}
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async offRpcResponse(name: string, cb: (result: IResponseTaskMsg) => void) {
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this.off(name, cb);
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}
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async onRpcRequest(name: string, cb: (data: IRequestTaskMsg) => void) {
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this.on(name, cb);
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}
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async offRpcRequest(name: string, cb: (data: IRequestTaskMsg) => void) {
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this.off(name, cb);
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}
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async emitNewServicesAvailable(services: IAvailableServicesMsg) {
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this.emit("services", services);
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}
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async onNewServicesAvailable(cb: (services: IAvailableServicesMsg) => void) {
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this.on("services", cb);
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}
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async onBonjour(cb: (dispatcher: string) => void) {
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this.on("bonjour", cb);
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}
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async emitBonjour(dispatcher: string) {
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this.emit("bonjour", dispatcher);
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}
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async emitNewTopicsAvailable(topics: IAvailableTopicsMsg) {
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this.emit("topics", topics);
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}
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async onNewTopicsAvailable(cb: (topics: IAvailableTopicsMsg) => void) {
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this.on("topics", cb);
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}
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async onEvent(event: string, cb: (data: IExternalEventMsg) => void) {
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this.on("event_" + event, cb);
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}
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async emitEvent(event: string, data: IExternalEventMsg) {
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this.emit("event_" + event, data);
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}
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async offEvent(event: string, cb: (data: IExternalEventMsg) => void) {
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this.off("event_" + event, cb);
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}
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} |