Add a Task system

src/Tasks/Upgrade.ts

@@ -0,0 +1,30 @@
+import profiler from "screeps-profiler";
+import { TaskData, TaskStatus, TaskType } from "./Task";
+
+export const Upgrade
+  = (target: StructureController): TaskData => ({
+    target,
+    targetPos: target.pos,
+    type: TaskType.Upgrade,
+    options: {},
+    data: {},
+  });
+
+export const runUpgrade = profiler.registerFN((creep: Creep): TaskStatus => {
+  const task = creep.task;
+  if (task == null) {
+    return TaskStatus.DONE;
+  }
+
+  if (creep.store.energy === 0) {
+    return TaskStatus.DONE;
+  }
+
+  const target = task.target as StructureController | null;
+
+  if (target == null
+    || creep.upgradeController(target) === ERR_NOT_IN_RANGE) {
+    creep.travelTo(task.targetPos);
+  }
+  return TaskStatus.IN_PROGRESS;
+}, "runUpgrade");