adding destroyer

src/core/execution/DestroyerExecution.ts

@@ -0,0 +1,39 @@
+import { AllPlayers, Cell, Execution, MutableGame, MutablePlayer, MutableUnit, PlayerID, UnitType } from "../game/Game";
+
+export class DestroyerExecution implements Execution {
+
+    private _owner: MutablePlayer
+    private active = true
+    private destroyer: MutableUnit = null
+    private mg: MutableGame = null
+
+    constructor(
+        private playerID: PlayerID,
+        private cell: Cell,
+    ) { }
+
+
+    init(mg: MutableGame, ticks: number): void {
+        this._owner = mg.player(this.playerID)
+        this.mg = mg
+    }
+
+    tick(ticks: number): void {
+        if (this.destroyer == null) {
+            this.destroyer = this._owner.addUnit(UnitType.Destroyer, 0, this.mg.tile(this.cell))
+        }
+    }
+
+    owner(): MutablePlayer {
+        return null
+    }
+
+    isActive(): boolean {
+        return this.active
+    }
+
+    activeDuringSpawnPhase(): boolean {
+        return false
+    }
+
+}