feat: add notification to contact response

src/app/services/ResponseStateNotificatio.spec.ts

@@ -0,0 +1,53 @@
+import { TestBed } from '@angular/core/testing';
+import { ResponseStateNotification } from './ResponseStateNotificatio';
+import { Notifier } from './notifier';
+import { catchError, EMPTY, of, throwError } from 'rxjs';
+import { Notification } from '../models/Notification';
+
+describe('ResponseStateNotificatio', () => {
+  let service: ResponseStateNotification;
+  let notifier: jasmine.SpyObj<Notifier>;
+
+  let NOTIFICATION_MOCK: Notification;
+  beforeEach(() => {
+    notifier = jasmine.createSpyObj(Notifier.name, ['notify']);
+    NOTIFICATION_MOCK = new Notification('mock', 'success');
+
+    TestBed.configureTestingModule({
+      providers: [{ provide: Notifier, useValue: notifier }],
+    });
+    service = TestBed.inject(ResponseStateNotification);
+  });
+
+  it('should be created', () => {
+    expect(service).toBeTruthy();
+  });
+
+  it('should notify success if observable has no errors', () => {
+    service
+      .handleResponse(
+        of({
+          data: null,
+          message: 'success',
+          success: true,
+        }),
+        NOTIFICATION_MOCK.message,
+        NOTIFICATION_MOCK.message
+      )
+      .subscribe();
+    expect(notifier.notify).toHaveBeenCalledOnceWith(NOTIFICATION_MOCK);
+  });
+
+  it('should notify error if observable throws error', () => {
+    service
+      .handleResponse(
+        throwError(() => new Error('Stream errored!')),
+        NOTIFICATION_MOCK.message,
+        NOTIFICATION_MOCK.message
+      )
+      .pipe(catchError(() => of(EMPTY)))
+      .subscribe();
+    NOTIFICATION_MOCK.type = 'error';
+    expect(notifier.notify).toHaveBeenCalledOnceWith(NOTIFICATION_MOCK);
+  });
+});

src/app/services/ResponseStateNotificatio.ts

@@ -0,0 +1,26 @@
+import { catchError, Observable, tap, throwError } from 'rxjs';
+import { Response } from '../models/Response';
+import { Notification } from '../models/Notification';
+import { inject, Injectable } from '@angular/core';
+import { Notifier } from './notifier';
+
+@Injectable({
+  providedIn: 'root',
+})
+export class ResponseStateNotification {
+  private readonly notifier = inject(Notifier);
+
+  handleResponse<T>(
+    r: Observable<Response<T>>,
+    success: string,
+    error: string
+  ): Observable<Response<T>> {
+    return r.pipe(
+      tap(() => this.notifier.notify(new Notification(success, 'success'))),
+      catchError((err) => {
+        this.notifier.notify(new Notification(error, 'error'));
+        return throwError(() => err);
+      })
+    );
+  }
+}

src/app/services/contact.service.ts

@@ -4,19 +4,29 @@ import { environment } from '../../environments/environment';
 import { ContactDTO } from '../models/ContactDTO';
 import { Response } from '../models/Response';
 import { BehaviorSubject, map, switchMap, tap } from 'rxjs';
+import { ResponseStateNotification } from './ResponseStateNotificatio';
+import { strings } from '../strings';
 
 @Injectable({
   providedIn: 'root',
 })
 export class ContactService {
   private readonly httpClient = inject(HttpClient);
+  private readonly responseStateNotification = inject(ResponseStateNotification);
   private readonly contacts = new BehaviorSubject<ContactDTO[]>([]);
+
   readonly contacts$ = this.contacts.asObservable();
 
   delete(id: number) {
-    return this.httpClient
-      .delete<Response<string>>(`${environment.apiUrl}/contacts/${id}`)
-      .pipe(switchMap(() => this.getAll()));
+    return this.httpClient.delete<Response<string>>(`${environment.apiUrl}/contacts/${id}`).pipe(
+      (r) =>
+        this.responseStateNotification.handleResponse(
+          r,
+          strings.deleteContactSuccessNotification,
+          strings.errorNotification
+        ),
+      switchMap(() => this.getAll())
+    );
   }
 
   findById(id: string) {
@@ -33,15 +43,27 @@ export class ContactService {
   }
 
   save(contact: ContactDTO) {
-    return this.httpClient
-      .post<Response<ContactDTO[] | null>>(environment.apiUrl + '/contacts', contact)
-      .pipe(switchMap(() => this.getAll()));
+    return this.httpClient.post<any>(environment.apiUrl + '/contacts', contact).pipe(
+      (r) =>
+        this.responseStateNotification.handleResponse(
+          r,
+          strings.createContactSuccessNotification,
+          strings.errorNotification
+        ),
+
+      switchMap(() => this.getAll())
+    );
   }
 
   update(contact: ContactDTO) {
-    return this.httpClient.put<Response<ContactDTO[] | null>>(
-      `${environment.apiUrl}/contacts/${contact.id}`,
-      contact
-    );
+    return this.httpClient
+      .put<Response<ContactDTO[] | null>>(`${environment.apiUrl}/contacts/${contact.id}`, contact)
+      .pipe((r) =>
+        this.responseStateNotification.handleResponse(
+          r,
+          strings.editContactSuccessNotification,
+          strings.errorNotification
+        )
+      );
   }
 }

src/app/strings.ts

@@ -9,11 +9,15 @@ export const strings = Object.freeze({
   contactsCompany: "Contact's company",
   contactsPhone: "Contact's phone",
   contactList: 'contact list',
+  createContactSuccessNotification: 'Contact created successfully',
+  deleteContactSuccessNotification: 'Contact deleted successfully',
   editContact: 'edit contact',
+  editContactSuccessNotification: 'Contact edited successfully',
   editTheContact: 'edit the contact',
   errorMessageMaxLength: (maxLen: number) => `Must be ${maxLen} characters or fewer.`,
   errorMessagePhonePattern: `Valid format: + (optional) plus 12 to 15 digits`,
   errorMessageRequired: 'This field is required.',
+  errorNotification: 'Oops, there was an error',
   name: 'name',
   phone: 'phone',
   save: 'save',