Rewriting from scratch. Fixing old code is just less fun.

main.js

@@ -3,38 +3,42 @@
     # Screeps       2022 #
     ######################*/
 
-const spawns = require("spawns");
-const creeps = require("creeps");
-const towers = require("towers");
-const ai_main = require("ai_main");
-
-const system = require("system");
+const system = require("_system");
 
 module.exports.loop = function () {
-    // New system
-    if (global.started == undefined) {
+    if (global.compiled == undefined) {
+        // Configure classes and constants
+        setupClasses();
+        setConstants();
         console.log("Script recompiled...");
-        global.started = true;
-        system.start();
-    }
-    system.update();
-
-
-
-    // Old system 
-    ai_main.run();
-    towers.run();
-    spawns.run();
-    if (Game.time % 60 == 0) {
-        clear_dead_creeps_from_memory();
-    }
-}
-
-
-function clear_dead_creeps_from_memory() {
-    for (var cr in Memory.creeps) {
-        if (Game.creeps[cr] == null) {
-            delete (Memory.creeps[cr]);
+        global.compiled = true;
+    } else {
+        if (global.started == undefined) {
+            // After one tick of configuration, restart the system.
+            system.start();
+            console.log("System started...");
+            global.started = true;
         }
+        system.update();
     }
 }
+
+const creepClass = require("ClassCreep");
+const roomClass = require("ClassRoom");
+const spawnClass = require("ClassSpawn");
+
+// Overwrite all game defined classes by mine inherited ones.
+function setupClasses() {
+    creepClass.setup();
+    roomClass.setup();
+    spawnClass.setup();
+}
+
+// Adds additional constants to global scope
+function setConstants() {
+    // The states of a room.
+    global.ROOMSTATE_NEUTRAL = 0;
+    global.ROOMSTATE_CAPITAL = 1;
+    global.ROOMSTATE_COLONY = 2;
+    global.ROOMSTATE_OUTPOST = 3;
+}