Refactor code structure for improved readability and maintainability

backend/models/room.js

@@ -5,6 +5,18 @@ const timeoutManager = require('./timeoutManager.js');
 const PawnSchema = require('./pawn');
 const PlayerSchema = require('./player');
 
+// Safe/colored box positions in Ludo (where pawns cannot be killed)
+const SAFE_POSITIONS = [16, 29, 42, 55];
+const HOME_ENTRY_POSITIONS = [66, 27, 40, 53];
+const STAR_POSITIONS = [63, 24, 37, 50];
+
+const isSafePosition = (position) => {
+    return SAFE_POSITIONS.includes(position) 
+    || HOME_ENTRY_POSITIONS.includes(position) 
+    || STAR_POSITIONS.includes(position) 
+    || position > 66; // Also safe in home stretch
+};
+
 const RoomSchema = new mongoose.Schema({
     name: String,
     private: { type: Boolean, default: false },
@@ -36,6 +48,11 @@ const RoomSchema = new mongoose.Schema({
 });
 
 RoomSchema.methods.beatPawns = function (position, attackingPawnColor) {
+    // Do not beat pawns on safe/colored positions
+    if (isSafePosition(position)) {
+        return;
+    }
+    
     const pawnsOnPosition = this.pawns.filter(pawn => pawn.position === position);
     pawnsOnPosition.forEach(pawn => {
         if (pawn.color !== attackingPawnColor) {