5 files changed, 57 insertions, 6 deletions

diff --git a/src/engine/systems/Grid.ts b/src/engine/systems/Grid.ts
index 28ca5ea..8756320 100644
--- a/src/engine/systems/Grid.ts
+++ b/src/engine/systems/Grid.ts
@@ -39,7 +39,7 @@ export class Grid extends System {
   }
 
   private highlightEntitiesLookedAt(game: Game) {
-    const highlightableEntities = new Set<string>();
+    const highlightableEntities: [string, Direction][] = [];
 
     game.forEachEntityWithComponent(
       ComponentNames.FacingDirection,
@@ -64,23 +64,23 @@ export class Grid extends System {
         }
 
         this.grid[lookingAt.y][lookingAt.x].forEach((id) => {
-          highlightableEntities.add(id);
+          highlightableEntities.push([id, facingDirection.currentDirection]);
         });
       },
     );
 
-    highlightableEntities.forEach((id) => {
+    highlightableEntities.forEach(([id, direction]) => {
       const entity = game.getEntity(id)!;
       if (entity.hasComponent(ComponentNames.Highlight)) {
         const highlight = entity.getComponent<Highlight>(
           ComponentNames.Highlight,
         )!;
-        highlight.highlight();
+        highlight.highlight(direction);
       }
     });
 
     game.forEachEntityWithComponent(ComponentNames.Highlight, (entity) => {
-      if (!highlightableEntities.has(entity.id)) {
+      if (!highlightableEntities.find(([id]) => id === entity.id)) {
         const highlight = entity.getComponent<Highlight>(
           ComponentNames.Highlight,
         )!;
diff --git a/src/engine/systems/LambdaFactory.ts b/src/engine/systems/LambdaFactory.ts
new file mode 100644
index 0000000..1263eae
--- /dev/null
+++ b/src/engine/systems/LambdaFactory.ts
@@ -0,0 +1,34 @@
+import { System, SystemNames } from ".";
+import { Game } from "..";
+import { ComponentNames, Grid, LambdaSpawn } from "../components";
+import { FunctionBox } from "../entities";
+
+export class LambdaFactory extends System {
+  constructor() {
+    super(SystemNames.LambdaFactory);
+  }
+
+  public update(_dt: number, game: Game) {
+    game.forEachEntityWithComponent(ComponentNames.LambdaSpawn, (entity) => {
+      const lambdaSpawn = entity.getComponent<LambdaSpawn>(
+        ComponentNames.LambdaSpawn,
+      )!;
+      const hasGrid = entity.hasComponent(SystemNames.Grid);
+
+      if (!lambdaSpawn.direction || !hasGrid) {
+        return;
+      }
+
+      const grid = entity.getComponent<Grid>(SystemNames.Grid)!;
+
+      const lambda = new FunctionBox(grid.gridPosition, lambdaSpawn.code);
+      const lambdaGrid = lambda.getComponent<Grid>(SystemNames.Grid)!;
+      lambdaGrid.movingDirection = lambdaSpawn.direction;
+      lambda.addComponent(lambdaGrid);
+      game.addEntity(lambda);
+
+      lambdaSpawn.direction = null;
+      entity.addComponent(lambdaSpawn);
+    });
+  }
+}
diff --git a/src/engine/systems/Render.ts b/src/engine/systems/Render.ts
index 83daa52..f273deb 100644
--- a/src/engine/systems/Render.ts
+++ b/src/engine/systems/Render.ts
@@ -1,5 +1,11 @@
 import { System, SystemNames } from ".";
-import { BoundingBox, ComponentNames, Highlight, Sprite } from "../components";
+import {
+  BoundingBox,
+  Text,
+  ComponentNames,
+  Highlight,
+  Sprite,
+} from "../components";
 import { Game } from "..";
 import { clamp } from "../utils";
 import { DrawArgs } from "../interfaces";
@@ -50,6 +56,15 @@ export class Render extends System {
         );
         drawArgs.tint = highlight.isHighlighted ? "red" : undefined;
       }
+      if (entity.hasComponent(ComponentNames.Text)) {
+        const text = entity.getComponent<Text>(ComponentNames.Text);
+        drawArgs.backgroundText = {
+          text: text.text,
+          font: text.font,
+          fillStyle: text.fillStyle,
+          textAlign: text.textAlign,
+        };
+      }
 
       sprite.draw(this.ctx, drawArgs);
     });
diff --git a/src/engine/systems/SystemNames.ts b/src/engine/systems/SystemNames.ts
index 0de5857..85d1539 100644
--- a/src/engine/systems/SystemNames.ts
+++ b/src/engine/systems/SystemNames.ts
@@ -3,4 +3,5 @@ export namespace SystemNames {
   export const Input = "Input";
   export const FacingDirection = "FacingDirection";
   export const Grid = "Grid";
+  export const LambdaFactory = "LambdaFactory";
 }
diff --git a/src/engine/systems/index.ts b/src/engine/systems/index.ts
index 18ffa2e..4490ee2 100644
--- a/src/engine/systems/index.ts
+++ b/src/engine/systems/index.ts
@@ -4,3 +4,4 @@ export * from "./Render";
 export * from "./Input";
 export * from "./FacingDirection";
 export * from "./Grid";
+export * from "./LambdaFactory";