Adding state history for lag compensation

lib/server/controllers/playercontroller.js

@@ -45,7 +45,7 @@ PlayerController.prototype.addInput = function (id, input, sequence, time) {
     });
 };
 
-PlayerController.prototype.updateState = function (id, state) {
+PlayerController.prototype.setState = function (id, state) {
     this.entities.some(function (player) {
         if (player.client.id === id) {
             player.state = state;

lib/server/entities/entity.js

@@ -4,8 +4,23 @@ function Entity () {
     this.state;
     this.sequence = 1;
     this.id;
+    this.stateHistory = [];
 }
 
 Entity.prototype = {
+    addState: function (state, executionTime) {
+        var minTime, spliceTo = 0;
+        this.stateHistory.push({ state: state, executionTime: executionTime });
+        minTime = this.stateHistory[this.stateHistory - 1].executionTime - 1000;
 
+        for (var i = 0; i < this.stateHistory.length; i ++) {
+            if (this.stateHistory[i].executionTime >= minTime) {
+                spliceTo = i - 1;
+                break;
+            }
+        }
+        if (spliceTo > 0) {
+            this.stateHistory.splice(0, spliceTo);
+        }
+    }
 };

lib/server/garageservergame.js

@@ -59,7 +59,7 @@ GarageServerGame.prototype.removePlayer = function (id) {
 };
 
 GarageServerGame.prototype.setPlayerState = function (id, state) {
-    this.playerController.updateState(id, state);
+    this.playerController.setState(id, state);
 };
 
 GarageServerGame.prototype.addPlayerInput = function (id, input, sequence, time) {