Adding strong checks on messages exchanged using generic-type-guard

deeployer.libsonnet

@@ -79,8 +79,6 @@
         "JITSI_URL": env.JITSI_URL,
         "SECRET_JITSI_KEY": env.SECRET_JITSI_KEY,
         "TURN_SERVER": "turn:coturn.workadventu.re:443,turns:coturn.workadventu.re:443",
-        "TURN_USER": "workadventure",
-        "TURN_PASSWORD": "WorkAdventure123",
         "JITSI_PRIVATE_MODE": if env.SECRET_JITSI_KEY != '' then "true" else "false",
         "START_ROOM_URL": "/_/global/maps."+url+"/Floor0/floor0.json"
         //"GA_TRACKING_ID": "UA-10196481-11"

front/src/Api/Events/ChatEvent.ts

@@ -0,0 +1,8 @@
+import * as tg from "generic-type-guard";
+
+export const isChatEvent =
+    new tg.IsInterface().withProperties({
+        message: tg.isString,
+        author: tg.isString,
+    }).get();
+export type ChatEvent = tg.GuardedType<typeof isChatEvent>;

front/src/Api/Events/IframeEvent.ts

@@ -0,0 +1,7 @@
+interface IframeEvent {
+    type: string;
+    data: unknown;
+}
+
+// eslint-disable-next-line @typescript-eslint/no-explicit-any
+export const isIframeEventWrapper = (event: any): event is IframeEvent => typeof event.type === 'string' && typeof event.data === 'object';

front/src/Api/IframeListener.ts

@@ -1,9 +1,8 @@
 import {Subject} from "rxjs";
+import {ChatEvent, isChatEvent} from "./Events/ChatEvent";
+import {isIframeEventWrapper} from "./Events/IframeEvent";
+
 
-interface ChatEvent {
-    message: string,
-    author: string
-}
 
 /**
  * Listens to messages from iframes and turn those messages into easy to use observables.
@@ -21,11 +20,13 @@ class IframeListener {
             // event.source is window.opener
             // event.data is the data sent by the iframe
 
-            // FIXME: this is WAAAAAAAY too sloppy as "any" let's us put anything in the message.
-
-            if (event.data.type === 'chat') {
-                this._chatStream.next(event.data.data);
+            const payload = event.data;
+            if (isIframeEventWrapper(payload)) {
+                if (payload.type === 'chat' && isChatEvent(payload.data)) {
+                    this._chatStream.next(payload.data);
                 }
+            }
+
 
         }, false);
     }

front/src/iframe_api.ts

@@ -1,13 +1,18 @@
+import {ChatEvent} from "./Api/Events/ChatEvent";
+
 interface WorkAdventureApi {
     sendChatMessage(message: string, author: string): void;
+    onChatMessage(callback: (message: string) => void): void;
 }
 
+declare global {
     // eslint-disable-next-line no-var
-declare var WA: WorkAdventureApi;
+    var WA: WorkAdventureApi
+}
 
 window.WA = {
     /**
-     * Sends a message in the chat.
+     * Send a message in the chat.
      * Only the local user will receive this message.
      */
     sendChatMessage(message: string, author: string) {
@@ -16,7 +21,13 @@ window.WA = {
             'data': {
                 'message': message,
                 'author': author
-            }
+            } as ChatEvent
         }, '*');
+    },
+    /**
+     * Listen to messages sent by the local user, in the chat.
+     */
+    onChatMessage(callback: (message: string) => void): void {
+
     }
 }