Initial commit

common/ecs/entity.ts

@@ -0,0 +1,28 @@
+import type { Component } from "./component.ts";
+
+// deno-lint-ignore no-explicit-any
+type ComponentConstructor<T extends Component> = new (...args: any[]) => T;
+
+export class Entity {
+	id: string;
+	// deno-lint-ignore no-explicit-any
+	components = new Map<ComponentConstructor<any>, Component>();
+	active = true;
+
+	constructor(id: string = crypto.randomUUID()) {
+		this.id = id;
+	}
+
+	add<T extends Component>(component: T): T {
+		this.components.set(component.constructor as ComponentConstructor<T>, component);
+		return component;
+	}
+
+	get<T extends Component>(type: ComponentConstructor<T>): T | undefined {
+		return this.components.get(type) as T;
+	}
+
+	get_all(): Iterable<Component> {
+		return this.components.values();
+	}
+}