fix(skymp5-client): partially fix animation exploit (skyrim-multiplay…

…er#2171)

skymp5-client/src/services/services/animDebugService.ts

@@ -5,6 +5,7 @@ import { ButtonEvent, CameraStateChangedEvent, DxScanCode, Menu } from "skyrimPl
 
 const playerId = 0x14;
 
+// TODO: split into two separate services: AnimDebugService and <you name it: a service for 3rd person camera enforcement in anims>
 export class AnimDebugService extends ClientListener {
   constructor(private sp: Sp, private controller: CombinedController) {
     super();
@@ -59,6 +60,7 @@ export class AnimDebugService extends ClientListener {
         this.sp.Game.forceThirdPerson();
         this.sp.Game.disablePlayerControls(true, false, true, false, false, false, false, false, 0);
         this.needsExitingAnim = true;
+        this.startAntiExploitPolling();
       });
     }
 
@@ -113,6 +115,7 @@ export class AnimDebugService extends ClientListener {
       this.sp.Debug.sendAnimationEvent(this.sp.Game.getPlayer(), this.settings.animKeys![e.code]);
 
       this.needsExitingAnim = true;
+      this.startAntiExploitPolling("no_death");
     }
 
     logTrace(this, `Sent animation event: ${this.settings.animKeys![e.code]}`);
@@ -132,6 +135,43 @@ export class AnimDebugService extends ClientListener {
     });
   }
 
+  private startAntiExploitPolling(mode: "no_death" | "death" = "death") {
+    // Fixes https://github.com/skyrim-multiplayer/skymp5-gamemode/issues/240
+    // P.S. There is a very similar code in skymp5-gamemode
+    // See disableCheats.ts, skymp5-gamemode for comments
+
+    let _callNative = this.sp.callNative;
+    let cameraState = -1;
+    let needsExitingAnim = false;
+
+    let f = (i: number): void => {
+      if (i >= 10 * 60) {
+        return;
+      }
+
+      cameraState = _callNative("Game", "getCameraState", undefined) as number;
+
+      needsExitingAnim = this.needsExitingAnim;
+
+      if (!needsExitingAnim) {
+        return f(Infinity);
+      }
+
+      if (cameraState === 0) { // 1-st person
+        _callNative("Game", "forceThirdPerson", undefined);
+        this.exitAnim();
+        if (mode === "death") {
+          this.sp.Game.getPlayer()?.damageActorValue("Health", 10000);
+        }
+        return f(Infinity);
+      }
+
+      this.controller.once("update", () => f(i + 1));
+    }
+
+    f(0);
+  }
+
   private queue?: AnimQueueCollection;
   private settings?: AnimDebugSettings;