initial commit

1 files changed, 33 insertions, 0 deletions

diff --git a/client/lib/entities/Entity.ts b/client/lib/entities/Entity.ts
new file mode 100644
index 0000000..e57ccde
--- /dev/null
+++ b/client/lib/entities/Entity.ts
@@ -0,0 +1,33 @@
+import type { Component } from "../components";
+import { ComponentNotFoundError } from "../exceptions";
+
+export abstract class Entity {
+  private static ID = 0;
+
+  public readonly id: number;
+  public readonly components: Map<string, Component>;
+
+  constructor() {
+    this.id = Entity.ID++;
+    this.components = new Map();
+  }
+
+  public addComponent(component: Component) {
+    this.components.set(component.name, component);
+  }
+
+  public getComponent<T extends Component>(name: string): T {
+    if (!this.hasComponent(name)) {
+      throw new Error("Entity does not have component " + name);
+    }
+    return this.components.get(name) as T;
+  }
+
+  public getComponents(): Component[] {
+    return Array.from(this.components.values());
+  }
+
+  public hasComponent(name: string): boolean {
+    return this.components.has(name);
+  }
+}