refactor: add update method

src/app/pages/main/contact.service.spec.ts

@@ -50,7 +50,7 @@ describe('ContactService', () => {
     expect(postReq.request.method).toEqual('POST');
     expect(postReq.request.body).toEqual(CONTACT_MOCK);
     CONTACT_MOCK.id = 1;
-    RES_MOCK.data = CONTACT_MOCK
+    RES_MOCK.data = CONTACT_MOCK;
     postReq.flush(RES_MOCK);
     const getReq = httpTestingController.expectOne(endpointURL);
     expect(getReq.request.method).toEqual('GET');
@@ -59,12 +59,25 @@ describe('ContactService', () => {
     httpTestingController.verify();
   });
 
+  it('should PUT contact with the given ID to the contacts ep ', () => {
+    const UPDATE_CONTACT_MOCK = new ContactDTO(1, 'mock', 'mock', 'mock');
+    service.update(UPDATE_CONTACT_MOCK).subscribe();
+    const putReq = httpTestingController.expectOne(`${endpointURL}/${UPDATE_CONTACT_MOCK.id}`);
+    expect(putReq.request.method).toEqual('PUT');
+    expect(putReq.request.body).toEqual(UPDATE_CONTACT_MOCK);
+    putReq.flush({
+      message: 'Contact updated successfully',
+      success: true,
+    });
+    httpTestingController.verify();
+  });
+
   it('should DELETE with the given ID to the contacts ep', () => {
     const ID_MOCK = 1;
     service.delete(ID_MOCK).subscribe();
     const deleteReq = httpTestingController.expectOne(`${endpointURL}/${ID_MOCK}`);
     expect(deleteReq.request.method).toEqual('DELETE');
-    RES_MOCK.message = "Contact deleted successfully";
+    RES_MOCK.message = 'Contact deleted successfully';
     deleteReq.flush(RES_MOCK);
     const getReq = httpTestingController.expectOne(endpointURL);
     expect(getReq.request.method).toEqual('GET');

src/app/pages/main/contact.service.ts

@@ -9,27 +9,39 @@ import { BehaviorSubject, map, switchMap, tap } from 'rxjs';
   providedIn: 'root',
 })
 export class ContactService {
-  
   private readonly httpClient = inject(HttpClient);
   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(switchMap(() => this.getAll()));
+  }
+
+  findById(id: string) {
+    return this.httpClient.get<Response<ContactDTO | null>>(`${environment.apiUrl}/contacts/${id}`);
   }
 
   getAll() {
-    return this.httpClient.get<Response<ContactDTO[]|null>>(environment.apiUrl+'/contacts')
+    return this.httpClient
+      .get<Response<ContactDTO[] | null>>(environment.apiUrl + '/contacts')
       .pipe(
-      map( response => response.data ?? []),
-      tap( contacts => this.contacts.next(contacts))
-    )
+        map((response) => response.data ?? []),
+        tap((contacts) => this.contacts.next(contacts))
+      );
   }
 
   save(contact: ContactDTO) {
-    return this.httpClient.post<Response<ContactDTO[]|null>>(environment.apiUrl+'/contacts', contact)
-    .pipe(switchMap(() => this.getAll()))
+    return this.httpClient
+      .post<Response<ContactDTO[] | null>>(environment.apiUrl + '/contacts', contact)
+      .pipe(switchMap(() => this.getAll()));
   }
 
+  update(contact: ContactDTO) {
+    return this.httpClient.put<Response<ContactDTO[] | null>>(
+      `${environment.apiUrl}/contacts/${contact.id}`,
+      contact
+    );
+  }
 }