Update code formatting

events/IpcRendererEventBus.ts

@@ -0,0 +1,35 @@
+import { CallbackStore, EventBusInterface } from './EventBus'
+import { Event } from './Events'
+import { IpcRenderer } from 'electron'
+
+export class IpcRendererEventBus implements EventBusInterface {
+  private ipc: IpcRenderer
+  private callbacks: Array<CallbackStore> = []
+  constructor(ipc: IpcRenderer) {
+    this.ipc = ipc
+  }
+  public subscribe<MessageType>(event: Event<MessageType>, callback: (msg: MessageType) => void) {
+    const wrappedCallback = (_: any, arg: any) => {
+      callback(arg)
+    }
+    this.ipc.on(event.topic, wrappedCallback)
+    this.callbacks.push({
+      callback,
+      wrappedCallback,
+    })
+  }
+  public unsubscribeAll<MessageType>(event: Event<MessageType>) {
+    this.ipc.removeAllListeners(event.topic)
+  }
+  public unsubscribe<MessageType>(event: Event<MessageType>, callback: any) {
+    const item = this.callbacks.find(store => store.callback === callback)
+    if (!item) {
+      return
+    }
+    this.ipc.removeListener(event.topic, item.wrappedCallback)
+    this.callbacks = this.callbacks.filter(a => a !== item)
+  }
+  public emit<MessageType>(event: Event<MessageType>, msg: MessageType) {
+    this.ipc.send(event.topic, msg)
+  }
+}