Add toasts & terminal funcs to electron app

Attach functions to the window object so that the wrapper can executeJs
to display messages to the player

src/Electron.tsx

@@ -22,6 +22,9 @@ import { Server } from "./Server/Server";
 import { Router } from "./ui/GameRoot";
 import { Page } from "./ui/Router";
 import { removeLeadingSlash } from "./Terminal/DirectoryHelpers";
+import { Terminal } from './Terminal';
+import { SnackbarEvents } from "./ui/React/Snackbar";
+import { IMap } from "./types";
 
 interface Achievement {
   ID: string;
@@ -417,6 +420,7 @@ export function initElectron(): void {
   setAchievements([]);
   initWebserver();
   setInterval(calculateAchievements, 5000);
+  initAppNotifier();
 }
 
 function initWebserver(): void {
@@ -451,3 +455,27 @@ function initWebserver(): void {
     return "not a script file";
   };
 }
+
+// Expose certain alert functions to allow the wrapper to sends message to the game
+function initAppNotifier(): void {
+  const funcs = {
+    terminal: (message: string, type?: string) => {
+      const typesFn: IMap<(s: string) => void> = {
+        info: Terminal.info,
+        warn: Terminal.warn,
+        error: Terminal.error,
+        success: Terminal.success
+      };
+      let fn;
+      if (type) fn = typesFn[type];
+      if (!fn) fn = Terminal.print;
+      fn.bind(Terminal)(message);
+    },
+    toast: (message: string, type: "info" | "success" | "warning" | "error" , duration = 2000) =>
+      SnackbarEvents.emit(message, type, duration),
+  }
+
+  // Will be consumud by the electron wrapper.
+  // @ts-ignore
+  window.appNotifier = funcs;
+}