[DURACOM-326] fix possible issue on missing value for eperson patch

(cherry picked from commit 7b9cd73)

Author: FrancescoMolinaro

src/app/core/eperson/eperson-data.service.spec.ts

@@ -31,6 +31,7 @@ import {
 import {
   EPersonMock,
   EPersonMock2,
+  EPersonMockWithNoName,
 } from '../../shared/testing/eperson.mock';
 import { GroupMock } from '../../shared/testing/group-mock';
 import { HALEndpointServiceStub } from '../../shared/testing/hal-endpoint-service.stub';
@@ -280,6 +281,37 @@ describe('EPersonDataService', () => {
     });
   });
 
+  describe('updateEPerson with non existing metadata', () => {
+    beforeEach(() => {
+      spyOn(service, 'findByHref').and.returnValue(createSuccessfulRemoteDataObject$(EPersonMockWithNoName));
+    });
+    describe('add name that was not previously set', () => {
+      beforeEach(() => {
+        const changedEPerson = Object.assign(new EPerson(), {
+          id: EPersonMock.id,
+          metadata: Object.assign(EPersonMock.metadata, {
+            'eperson.firstname': [
+              {
+                language: null,
+                value: 'User',
+              },
+            ],
+          }),
+          email: EPersonMock.email,
+          canLogIn: EPersonMock.canLogIn,
+          requireCertificate: EPersonMock.requireCertificate,
+          _links: EPersonMock._links,
+        });
+        service.updateEPerson(changedEPerson).subscribe();
+      });
+      it('should send PatchRequest with add email operation', () => {
+        const operations = [{ op: 'add', path: '/eperson.firstname', value: [{ language: null, value: 'User' }] }];
+        const expected = new PatchRequest(requestService.generateRequestId(), epersonsEndpoint + '/' + EPersonMock.uuid, operations);
+        expect(requestService.send).toHaveBeenCalledWith(expected);
+      });
+    });
+  });
+
   describe('clearEPersonRequests', () => {
     beforeEach(() => {
       spyOn(halService, 'getEndpoint').and.callFake((linkPath: string) => {

src/app/core/eperson/eperson-data.service.ts

@@ -269,7 +269,8 @@ export class EPersonDataService extends IdentifiableDataService<EPerson> impleme
    * @param newEPerson
    */
   private generateOperations(oldEPerson: EPerson, newEPerson: EPerson): Operation[] {
-    let operations = this.comparator.diff(oldEPerson, newEPerson).filter((operation: Operation) => operation.op === 'replace');
+    let operations = this.comparator.diff(oldEPerson, newEPerson)
+      .filter((operation: Operation) => ['replace', 'add'].includes(operation.op));
     if (hasValue(oldEPerson.email) && oldEPerson.email !== newEPerson.email) {
       operations = [...operations, {
         op: 'replace', path: '/email', value: newEPerson.email,

src/app/shared/testing/eperson.mock.ts

@@ -91,3 +91,43 @@ export const EPersonMock2: EPerson = Object.assign(new EPerson(), {
     ],
   },
 });
+
+export const EPersonMockWithNoName: EPerson = Object.assign(new EPerson(), {
+  handle: null,
+  groups: [],
+  netid: 'test@test.com',
+  lastActive: '2018-05-14T12:25:42.411+0000',
+  canLogIn: true,
+  email: 'test@test.com',
+  requireCertificate: false,
+  selfRegistered: false,
+  _links: {
+    self: {
+      href: 'https://rest.api/dspace-spring-rest/api/eperson/epersons/testid',
+    },
+    groups: { href: 'https://rest.api/dspace-spring-rest/api/eperson/epersons/testid/groups' },
+  },
+  id: 'testid',
+  uuid: 'testid',
+  type: 'eperson',
+  metadata: {
+    'dc.title': [
+      {
+        language: null,
+        value: 'User Test',
+      },
+    ],
+    'eperson.lastname': [
+      {
+        language: null,
+        value: 'Test',
+      },
+    ],
+    'eperson.language': [
+      {
+        language: null,
+        value: 'en',
+      },
+    ],
+  },
+});