feat(core): add destroyService

libs/shared/utils/src/index.ts

@@ -1 +1,2 @@
+export * from './lib/destroy-service.service';
 export * from './lib/random-http-error.utils';

libs/shared/utils/src/lib/destroy-service.service.ts

@@ -0,0 +1,39 @@
+import { ClassProvider, inject, Injectable, OnDestroy } from '@angular/core';
+import { Observable, Subject } from 'rxjs';
+
+function describeDestroyService() {
+  @Injectable()
+  class DestroyService extends Subject<void> implements OnDestroy {
+    ngOnDestroy(): void {
+      this.next();
+      this.complete();
+    }
+  }
+
+  function provideDestroyService(): ClassProvider {
+    return {
+      provide: DestroyService,
+      useClass: DestroyService,
+    };
+  }
+
+  function injectDestroyService(): Observable<void> {
+    const destroy$ = inject(DestroyService, { self: true, optional: true });
+
+    if (!destroy$) {
+      throw new Error(
+        'It seems that you forgot to provide DestroyService. Add "provideDestroyService()" to your declarable\'s providers.'
+      );
+    }
+
+    return destroy$.asObservable();
+  }
+
+  return {
+    provideDestroyService,
+    injectDestroyService,
+  };
+}
+
+export const { provideDestroyService, injectDestroyService } =
+  describeDestroyService();