init

packages/utils/src/services.ts

@@ -0,0 +1,51 @@
+const destroy = Symbol('destroy');
+const instanceKey = Symbol('instances');
+
+type ServiceDependency<T> = new (services: Services) => T & {
+  [destroy]?: () => Promise<void> | void;
+};
+
+class Services {
+  [instanceKey]: Map<ServiceDependency<unknown>, unknown>;
+
+  constructor() {
+    this[instanceKey] = new Map();
+  }
+
+  public get = <T>(service: ServiceDependency<T>) => {
+    if (!this[instanceKey].has(service)) {
+      this[instanceKey].set(service, new service(this));
+    }
+    const instance = this[instanceKey].get(service);
+    if (!instance) {
+      throw new Error('Could not generate instance');
+    }
+    return instance as T;
+  };
+
+  public set = <T>(service: ServiceDependency<T>, instance: Partial<T>) => {
+    this[instanceKey].set(service, instance);
+  };
+
+  public clone = () => {
+    const services = new Services();
+    services[instanceKey] = Object.fromEntries(this[instanceKey].entries());
+  };
+
+  public destroy = async () => {
+    await Promise.all(
+      this[instanceKey].values().map(async (instance) => {
+        if (
+          typeof instance === 'object' &&
+          instance &&
+          destroy in instance &&
+          typeof instance[destroy] === 'function'
+        ) {
+          await instance[destroy]();
+        }
+      }),
+    );
+  };
+}
+
+export { Services, destroy };