Merge pull request #25 from delasy/feat-simulation

Simulation Function

games/ZombieSurvival/Direction.ts

@@ -0,0 +1,69 @@
+import { Position } from "./Position";
+
+export enum Direction {
+  Down,
+  Left,
+  Right,
+  Up,
+}
+
+export const allDirections = [
+  Direction.Down,
+  Direction.Left,
+  Direction.Right,
+  Direction.Up,
+];
+
+export function directionToString(direction: Direction): string {
+  switch (direction) {
+    case Direction.Down: {
+      return "0";
+    }
+    case Direction.Left: {
+      return "1";
+    }
+    case Direction.Right: {
+      return "2";
+    }
+    case Direction.Up: {
+      return "3";
+    }
+  }
+}
+
+export function directionFromString(val: string): Direction {
+  switch (val) {
+    case "0": {
+      return Direction.Down;
+    }
+    case "1": {
+      return Direction.Left;
+    }
+    case "2": {
+      return Direction.Right;
+    }
+    case "3": {
+      return Direction.Up;
+    }
+    default: {
+      throw new Error("Can't parse direction");
+    }
+  }
+}
+
+export function move(position: Position, direction: Direction): Position {
+  switch (direction) {
+    case Direction.Down: {
+      return { ...position, y: position.y + 1 };
+    }
+    case Direction.Left: {
+      return { ...position, x: position.x - 1 };
+    }
+    case Direction.Right: {
+      return { ...position, x: position.x + 1 };
+    }
+    case Direction.Up: {
+      return { ...position, y: position.y - 1 };
+    }
+  }
+}

games/ZombieSurvival/Position.ts

@@ -0,0 +1,8 @@
+export interface Position {
+  x: number;
+  y: number;
+}
+
+export function positionAsNumber(position: Position): number {
+  return position.x + position.y;
+}