Adding the abaility to track users entering/leaving a zone in the script language.

front/src/Api/Events/EnterLeaveEvent.ts

@@ -0,0 +1,10 @@
+import * as tg from "generic-type-guard";
+
+export const isEnterLeaveEvent =
+    new tg.IsInterface().withProperties({
+        name: tg.isString,
+    }).get();
+/**
+ * A message sent from the game to the iFrame when a user enters or leaves a zone marked with the "zone" property.
+ */
+export type EnterLeaveEvent = tg.GuardedType<typeof isEnterLeaveEvent>;

front/src/Api/IframeListener.ts

@@ -4,6 +4,7 @@ import {IframeEvent, isIframeEventWrapper} from "./Events/IframeEvent";
 import {UserInputChatEvent} from "./Events/UserInputChatEvent";
 import * as crypto from "crypto";
 import {HtmlUtils} from "../WebRtc/HtmlUtils";
+import {EnterLeaveEvent} from "./Events/EnterLeaveEvent";
 
 
 
@@ -130,6 +131,24 @@ class IframeListener {
         });
     }
 
+    sendEnterEvent(name: string) {
+        this.postMessage({
+            'type': 'enterEvent',
+            'data': {
+                "name": name
+            } as EnterLeaveEvent
+        });
+    }
+
+    sendLeaveEvent(name: string) {
+        this.postMessage({
+            'type': 'leaveEvent',
+            'data': {
+                "name": name
+            } as EnterLeaveEvent
+        });
+    }
+
     /**
      * Sends the message... to all allowed iframes.
      */