[ACS-4662] Allow to see category children after search (#8494)

* [ACS-4662] intermediate progress

* [ACS-4662] Allow to see children of category after searching

* [ACS-4662] added unit test

* [ACS-4662] linting

lib/content-services/src/lib/category/mock/category-mock.service.ts

@@ -32,6 +32,16 @@ export class CategoryServiceMock {
         return parentNodeId ? of(this.getChildrenLevelResponse(skipCount, maxItems)) : of(this.getRootLevelResponse(skipCount, maxItems));
     }
 
+    public getCategory(): Observable<CategoryEntry> {
+        return of({
+            entry: {
+                name: 'some name',
+                id: 'some id',
+                hasChildren: true
+            }
+        });
+    }
+
     public searchCategories(): Observable<ResultSetPaging> {
         const result = new ResultSetPaging();
         result.list = new ResultSetPagingList();

lib/content-services/src/lib/category/services/category-tree-datasource.service.spec.ts

@@ -21,7 +21,7 @@ import { CategoryService } from '../services/category.service';
 import { CategoryNode, CategoryTreeDatasourceService } from '@alfresco/adf-content-services';
 import { CategoryServiceMock } from '../mock/category-mock.service';
 import { TreeNodeType, TreeResponse } from '../../tree';
-import { EMPTY } from 'rxjs';
+import { EMPTY, of } from 'rxjs';
 import { Pagination } from '@alfresco/js-api';
 
 describe('CategoryTreeDatasourceService', () => {
@@ -83,7 +83,45 @@ describe('CategoryTreeDatasourceService', () => {
         expect(categoryService.searchCategories).toHaveBeenCalledWith(name, skipCount, maxItems);
     });
 
+    it('should call getCategory for every instance if value of name parameter is defined', (done) => {
+        spyOn(categoryService, 'getCategory').and.returnValues(of({
+                entry: {
+                    name: 'name',
+                    id: 'some id 1',
+                    hasChildren: true
+                }
+            }),
+            of({
+                entry: {
+                    name: 'Language/some other name',
+                    id: 'some id 2',
+                    hasChildren: false
+                }
+            }));
+        categoryTreeDatasourceService.getSubNodes('id', undefined, undefined, 'name')
+            .subscribe(() => {
+
+                expect(categoryService.getCategory).toHaveBeenCalledWith('some id 1');
+                expect(categoryService.getCategory).toHaveBeenCalledWith('some id 2');
+                done();
+            });
+    });
+
     it('should return observable which emits correct categories', (done) => {
+        spyOn(categoryService, 'getCategory').and.returnValues(of({
+                entry: {
+                    name: 'some name',
+                    id: 'some id 1',
+                    hasChildren: true
+                }
+            }),
+            of({
+                entry: {
+                    name: 'Language/some other name',
+                    id: 'some id 2',
+                    hasChildren: false
+                }
+            }));
         categoryTreeDatasourceService.getSubNodes('id', undefined, undefined, 'name')
             .subscribe((response) => {
                 const pagination = new Pagination();
@@ -96,7 +134,7 @@ describe('CategoryTreeDatasourceService', () => {
                         parentId: 'parent id 1',
                         level: 0,
                         nodeType: TreeNodeType.RegularNode,
-                        hasChildren: false,
+                        hasChildren: true,
                         isLoading: false
                     }, {
                         id: 'some id 2',

lib/content-services/src/lib/category/services/category-tree-datasource.service.ts

@@ -20,8 +20,8 @@ import { TreeNodeType, TreeResponse, TreeService } from '../../tree';
 import { CategoryNode } from '../models/category-node.interface';
 import { CategoryService } from './category.service';
 import { CategoryEntry, CategoryPaging } from '@alfresco/js-api';
-import { Observable } from 'rxjs';
+import { from, Observable } from 'rxjs';
-import { map } from 'rxjs/operators';
+import { map, mergeMap, toArray } from 'rxjs/operators';
 
 @Injectable({ providedIn: 'root' })
 export class CategoryTreeDatasourceService extends TreeService<CategoryNode>  {
@@ -56,25 +56,29 @@ export class CategoryTreeDatasourceService extends TreeService<CategoryNode>  {
             }
             const treeResponse: TreeResponse<CategoryNode> = {entries: nodesList, pagination: response.list.pagination};
             return treeResponse;
-        })) : this.categoryService.searchCategories(name, skipCount, maxItems).pipe(map((pagingResult) => {
+        })) : this.categoryService.searchCategories(name, skipCount, maxItems).pipe(mergeMap((pagingResult) => {
             const nextAfterGeneralPathPartIndex = 3;
             const pathSeparator = '/';
-            return {
+            return from(pagingResult.list.entries).pipe(mergeMap((category) => {
-                entries: pagingResult.list.entries.map((category) => {
                 const path = category.entry.path.name.split(pathSeparator).slice(nextAfterGeneralPathPartIndex)
                     .join(pathSeparator);
+
+                return this.categoryService.getCategory(category.entry.id).pipe(
+                    map((res) => {
                         return {
                             id: category.entry.id,
                             nodeName: path ? `${path}/${category.entry.name}` : category.entry.name,
                             parentId: category.entry.parentId,
                             level: 0,
                             nodeType: TreeNodeType.RegularNode,
-                        hasChildren: false,
+                            hasChildren: res.entry.hasChildren,
                             isLoading: false
                         };
+                    })
+                );
             }),
-                pagination: pagingResult.list.pagination
+                toArray(),
-            };
+                map(res =>  ({entries: res, pagination: pagingResult.list.pagination})));
         }));
     }
 }