1 files changed, 39 insertions, 0 deletions
diff --git a/src/engine/systems/GridSpawner.ts b/src/engine/systems/GridSpawner.ts
new file mode 100644
index 0000000..c566444
--- /dev/null
+++ b/src/engine/systems/GridSpawner.ts
@@ -0,0 +1,39 @@
+import { System, SystemNames } from ".";
+import { Game } from "..";
+import { ComponentNames, Grid, GridSpawn } from "../components";
+import { Direction } from "../interfaces";
+
+export class GridSpawner extends System {
+  constructor() {
+    super(SystemNames.GridSpawner);
+  }
+
+  public update(_dt: number, game: Game) {
+    game.forEachEntityWithComponent(ComponentNames.GridSpawn, (entity) => {
+      const spawn = entity.getComponent<GridSpawn>(ComponentNames.GridSpawn)!;
+      const hasGrid = entity.hasComponent(SystemNames.Grid);
+
+      if (spawn.direction === Direction.NONE || !hasGrid) {
+        return;
+      }
+
+      const grid = entity.getComponent<Grid>(SystemNames.Grid)!;
+
+      const direction = spawn.direction;
+      const spawned = spawn.spawner();
+      if (!spawned) {
+        return;
+      }
+      spawn.direction = Direction.NONE;
+      entity.addComponent(spawn);
+
+      const spawnedGrid = spawned.getComponent<Grid>(SystemNames.Grid)!;
+      spawnedGrid.gridPosition = grid.gridPosition;
+      spawnedGrid.movingDirection = direction;
+      spawned.addComponent(spawnedGrid);
+
+      game.addEntity(spawned);
+      entity.addComponent(spawned);
+    });
+  }
+}