Add browser support with Socket.io transport, authentication, performance-optimized IPC, and CI/CD (#925)

events/EventSystem/SocketIOClientEventBus.ts

@@ -0,0 +1,42 @@
+import { Socket } from 'socket.io-client'
+import { CallbackStore } from './CallbackStore'
+import { EventBusInterface } from './EventBusInterface'
+import { Event } from '../Events'
+
+export class SocketIOClientEventBus implements EventBusInterface {
+  private socket: Socket
+  private callbacks: Array<CallbackStore> = []
+
+  constructor(socket: Socket) {
+    this.socket = socket
+  }
+
+  public subscribe<MessageType>(event: Event<MessageType>, callback: (msg: MessageType) => void) {
+    const wrappedCallback = (arg: any) => {
+      callback(arg)
+    }
+    console.log('subscribing', event.topic)
+    this.socket.on(event.topic, wrappedCallback)
+    this.callbacks.push({
+      callback,
+      wrappedCallback,
+    })
+  }
+
+  public unsubscribeAll<MessageType>(event: Event<MessageType>) {
+    this.socket.removeAllListeners(event.topic)
+  }
+
+  public unsubscribe<MessageType>(event: Event<MessageType>, callback: any) {
+    const item = this.callbacks.find(store => store.callback === callback)
+    if (!item) {
+      return
+    }
+    this.socket.off(event.topic, item.wrappedCallback)
+    this.callbacks = this.callbacks.filter(a => a !== item)
+  }
+
+  public emit<MessageType>(event: Event<MessageType>, msg: MessageType) {
+    this.socket.emit(event.topic, msg)
+  }
+}