Support withSubs on the menuproviders in appmenu

Adds support to define child providers for a parent menu using a .withSubs option. This parent menu will always be displayed as an expandable menu.
When no children are visible, the expandable menus will be hidden.

src/app/admin/admin-sidebar/expandable-admin-sidebar-section/expandable-admin-sidebar-section.component.html

@@ -1,4 +1,4 @@
-<div class="sidebar-section" [ngClass]="{'expanded': (expanded | async)}"
+<div *ngIf="hasSubSections$ | async" class="sidebar-section" [ngClass]="{'expanded': (expanded | async)}"
     [@bgColor]="{
      value: ((expanded | async) ? 'endBackground' : 'startBackground'),
      params: {endColor: (sidebarActiveBg | async)}}">

src/app/admin/admin-sidebar/expandable-admin-sidebar-section/expandable-admin-sidebar-section.component.ts

@@ -11,6 +11,7 @@ import { map } from 'rxjs/operators';
 import { rendersSectionForMenu } from '../../../shared/menu/menu-section.decorator';
 import { MenuID } from '../../../shared/menu/menu-id.model';
 import { Router } from '@angular/router';
+import { isNotEmpty } from '../../../shared/empty.util';
 
 /**
  * Represents a expandable section in the sidebar
@@ -51,6 +52,12 @@ export class ExpandableAdminSidebarSectionComponent extends AdminSidebarSectionC
    */
   expanded: Observable<boolean>;
 
+  /**
+   * Emits true when the top section has subsections, else emits false
+   */
+  hasSubSections$: Observable<boolean>;
+
+
   constructor(
     @Inject('sectionDataProvider') protected section: MenuSection,
     protected menuService: MenuService,
@@ -66,6 +73,9 @@ export class ExpandableAdminSidebarSectionComponent extends AdminSidebarSectionC
    */
   ngOnInit(): void {
     super.ngOnInit();
+    this.hasSubSections$ = this.subSections$.pipe(
+      map((subSections) => isNotEmpty(subSections))
+    );
     this.sidebarActiveBg = this.variableService.getVariable('--ds-admin-sidebar-active-bg');
     this.sidebarCollapsed = this.menuService.isMenuCollapsed(this.menuID);
     this.sidebarPreviewCollapsed = this.menuService.isMenuPreviewCollapsed(this.menuID);

src/app/app.menus.ts

@@ -31,6 +31,7 @@ import { COMMUNITY_MODULE_PATH } from './community-page/community-page-routing-p
 import { COLLECTION_MODULE_PATH } from './collection-page/collection-page-routing-paths';
 import { ENTITY_MODULE_PATH, ITEM_MODULE_PATH } from './item-page/item-page-routing-paths';
 import { HOME_PAGE_PATH } from './app-routing-paths';
+import { DsoOptionMenu } from './shared/menu/providers/dso-option-menu.service';
 
 export const MENUS = buildMenuStructure({
   [MenuID.PUBLIC]: [
@@ -53,10 +54,13 @@ export const MENUS = buildMenuStructure({
     SystemWideAlertMenuProvider,
   ],
   [MenuID.DSO_EDIT]: [
+    DsoOptionMenu.withSubs([
       DSpaceObjectEditMenuProvider.onRoute(COMMUNITY_MODULE_PATH, COLLECTION_MODULE_PATH, ITEM_MODULE_PATH, ENTITY_MODULE_PATH),
       VersioningMenuProvider.onRoute(ITEM_MODULE_PATH, ENTITY_MODULE_PATH),
       OrcidMenuProvider.onRoute(ITEM_MODULE_PATH, ENTITY_MODULE_PATH),
       ClaimMenuProvider.onRoute(ITEM_MODULE_PATH, ENTITY_MODULE_PATH),
+      // SubscribeMenuProvider,
+    ]),
     SubscribeMenuProvider.onRoute(COMMUNITY_MODULE_PATH, COLLECTION_MODULE_PATH),
   ],
 });

src/app/collection-page/collection-page.component.html

@@ -34,9 +34,6 @@
                   </ds-comcol-page-content>
                 </header>
                 <ds-dso-edit-menu></ds-dso-edit-menu>
-                <div class="pl-2 space-children-mr">
-                  <ds-dso-page-subscription-button [dso]="collection"></ds-dso-page-subscription-button>
-                </div>
               </div>
               <section class="comcol-page-browse-section">
               <!-- Browse-By Links -->

src/app/community-page/community-page.component.html

@@ -21,9 +21,6 @@
           </ds-comcol-page-content>
         </header>
         <ds-dso-edit-menu></ds-dso-edit-menu>
-        <div class="pl-2 space-children-mr">
-          <ds-dso-page-subscription-button [dso]="communityPayload"></ds-dso-page-subscription-button>
-        </div>
       </div>
       <section class="comcol-page-browse-section">
 

src/app/init.service.ts

@@ -191,11 +191,7 @@ export abstract class InitService {
     this.breadcrumbsService.listenForRouteChanges();
     this.themeService.listenForRouteChanges();
     // this.menuService.listenForRouteChanges();
-    this.menuProviderService.listenForRouteChanges().subscribe((done) => {
+    this.menuProviderService.listenForRouteChanges();
-      Object.values(MenuID).forEach((menuID) => {
-        this.menuService.buildRouteMenuSections(menuID);
-      }); 
-    })
   }
 
   protected initPersistentMenus(): void {

src/app/navbar/expandable-navbar-section/expandable-navbar-section.component.html

@@ -1,4 +1,5 @@
-<div class="nav-item dropdown expandable-navbar-section text-md-center"
+<div *ngIf="hasSubSections$ | async">
+    <div class="nav-item dropdown expandable-navbar-section text-md-center"
          *ngVar="(active | async) as isActive"
          (keyup.enter)="isActive ? deactivateSection($event) : activateSection($event)"
          (keyup.space)="isActive ? deactivateSection($event) : activateSection($event)"
@@ -19,4 +20,5 @@
                         *ngComponentOutlet="(sectionMap$ | async).get(subSection.id).component; injector: (sectionMap$ | async).get(subSection.id).injector;"></ng-container>
             </ng-container>
         </ul>
+    </div>
 </div>

src/app/navbar/expandable-navbar-section/expandable-navbar-section.component.ts

@@ -3,10 +3,12 @@ import { MenuSection } from '../../shared/menu/menu-section.model';
 import { NavbarSectionComponent } from '../navbar-section/navbar-section.component';
 import { MenuService } from '../../shared/menu/menu.service';
 import { slide } from '../../shared/animations/slide';
-import { first } from 'rxjs/operators';
+import { first, map } from 'rxjs/operators';
 import { HostWindowService } from '../../shared/host-window.service';
 import { rendersSectionForMenu } from '../../shared/menu/menu-section.decorator';
 import { MenuID } from '../../shared/menu/menu-id.model';
+import { Observable } from 'rxjs';
+import { isNotEmpty } from '../../shared/empty.util';
 
 /**
  * Represents an expandable section in the navbar
@@ -24,6 +26,11 @@ export class ExpandableNavbarSectionComponent extends NavbarSectionComponent imp
    */
   menuID = MenuID.PUBLIC;
 
+  /**
+   * Emits true when the top section has subsections, else emits false
+   */
+  hasSubSections$: Observable<boolean>;
+
   constructor(
     @Inject('sectionDataProvider') protected section: MenuSection,
     protected menuService: MenuService,
@@ -35,6 +42,9 @@ export class ExpandableNavbarSectionComponent extends NavbarSectionComponent imp
 
   ngOnInit() {
     super.ngOnInit();
+    this.hasSubSections$ = this.subSections$.pipe(
+      map((subSections) => isNotEmpty(subSections))
+    );
   }
 
   /**

src/app/shared/dso-page/dso-edit-menu/dso-edit-expandable-menu-section/dso-edit-menu-expandable-section.component.html

@@ -1,4 +1,4 @@
-<div class="dso-button-menu mb-1" ngbDropdown container="body" placement="bottom-right">
+<div *ngIf="hasSubSections$ | async" class="dso-button-menu mb-1" ngbDropdown container="body" placement="bottom-right">
     <div class="d-flex flex-row flex-nowrap"
          [ngbTooltip]="itemModel.text | translate">
         <button [attr.aria-label]="itemModel.text | translate" [title]="itemModel.text | translate" class="btn btn-dark btn-sm" ngbDropdownToggle [disabled]="section.model?.disabled">

src/app/shared/dso-page/dso-edit-menu/dso-edit-expandable-menu-section/dso-edit-menu-expandable-section.component.ts

@@ -7,7 +7,7 @@ import { MenuID } from 'src/app/shared/menu/menu-id.model';
 import { MenuSection } from 'src/app/shared/menu/menu-section.model';
 import { Observable } from 'rxjs';
 import { map } from 'rxjs/operators';
-import { hasValue } from '../../../empty.util';
+import { hasValue, isNotEmpty } from '../../../empty.util';
 
 /**
  * Represents an expandable section in the dso edit menus
@@ -21,11 +21,27 @@ import { hasValue } from '../../../empty.util';
 @rendersSectionForMenu(MenuID.DSO_EDIT, true)
 export class DsoEditMenuExpandableSectionComponent extends AbstractMenuSectionComponent {
 
+  /**
+   * This section resides in the DSO edit menu
+   */
   menuID: MenuID = MenuID.DSO_EDIT;
+
+
+  /**
+   * The MenuItemModel of the top section
+   */
   itemModel;
 
+  /**
+   * Emits whether one of the subsections contains an icon
+   */
   renderIcons$: Observable<boolean>;
 
+  /**
+   * Emits true when the top section has subsections, else emits false
+   */
+  hasSubSections$: Observable<boolean>;
+
   constructor(
     @Inject('sectionDataProvider') protected section: MenuSection,
     protected menuService: MenuService,
@@ -45,5 +61,10 @@ export class DsoEditMenuExpandableSectionComponent extends AbstractMenuSectionCo
         return sections.some(section => hasValue(section.icon));
       }),
     );
+
+    this.hasSubSections$ = this.subSections$.pipe(
+      map((subSections) => isNotEmpty(subSections))
+    );
+    
   }
 }

src/app/shared/menu/initial-menus-state.ts

@@ -28,7 +28,7 @@ export const initialMenusState: MenusState = {
       id: MenuID.DSO_EDIT,
       collapsed: true,
       previewCollapsed: true,
-      visible: false,
+      visible: true,
       sections: {},
       sectionToSubsectionIndex: {}
     },

src/app/shared/menu/menu-provider.service.ts

@@ -9,12 +9,10 @@
 import { Inject, Injectable, Injector, Optional, } from '@angular/core';
 import { ActivatedRoute, ActivatedRouteSnapshot, ResolveEnd, Router, RouterStateSnapshot, } from '@angular/router';
 import { combineLatest, map, Observable, } from 'rxjs';
-import { filter, find, switchMap, take, tap, } from 'rxjs/operators';
+import { filter, find, switchMap, take, } from 'rxjs/operators';
-import { v4 as uuidv4 } from 'uuid';
 import { hasValue, isNotEmpty } from '../empty.util';
 import { MenuID } from './menu-id.model';
-import { AbstractMenuProvider } from './menu-provider';
+import { AbstractMenuProvider, PartialMenuSection } from './menu-provider';
-import { MenuSection } from './menu-section.model';
 import { MenuState } from './menu-state.model';
 import { MenuService } from './menu.service';
 import { MENU_PROVIDER } from './menu.structure';
@@ -44,8 +42,8 @@ export class MenuProviderService {
     );
   }
 
-  listenForRouteChanges(): Observable<boolean> {
+  listenForRouteChanges() {
-    return this.router.events.pipe(
+    this.router.events.pipe(
       filter(event => event instanceof ResolveEnd),
       switchMap((event: ResolveEnd) => {
 
@@ -53,7 +51,11 @@ export class MenuProviderService {
 
         return this.resolveRouteMenus(currentRoute, event.state);
       }),
-    );
+    ).subscribe((done) => {
+      Object.values(MenuID).forEach((menuID) => {
+        this.menuService.buildRouteMenuSections(menuID);
+      });
+    });
   }
 
   private getCurrentRoute(route: ActivatedRouteSnapshot): ActivatedRouteSnapshot {
@@ -71,47 +73,30 @@ export class MenuProviderService {
 
     return combineLatest([
       ...this.providers
+        .map((provider) => {
+          return provider;
+        })
         .filter(provider => provider.shouldPersistOnRouteChange)
-          .map(provider => provider.getSections().pipe(
+        .map(provider => provider.getSections()
-            tap((sections) => {
+          .pipe(
-              sections.forEach((section: MenuSection) => {
+            map((sections) => {
-                this.menuService.addSection(provider.menuID, {
+              return {provider: provider, sections: sections};
-                  ...section,
+            }),
-                  id: section.id ?? uuidv4(),
+          )
-                  index: section.index ?? provider.index,
+        )])
-                  shouldPersistOnRouteChange: true,
+      .pipe(
-                });
+        switchMap((providerWithSections: { provider: AbstractMenuProvider, sections: PartialMenuSection[] }[]) => {
-              });
+          const waitForMenus = providerWithSections.map((providerWithSection: {
+            provider: AbstractMenuProvider,
+            sections: PartialMenuSection[]
+          }, sectionIndex) => {
+            providerWithSection.sections.forEach((section) => {
+              this.addSection(providerWithSection, section);
+            });
+            return this.waitForMenu$(providerWithSection.provider.menuID);
+          });
+          return [waitForMenus];
         }),
-            switchMap(() => this.waitForMenu$(provider.menuID)),
-          )),
-      // ...this.providers
-      //   .filter(provider => {
-      //     let matchesPath = false;
-      //     if (isNotEmpty(provider.activePaths)) {
-      //       route.url.forEach((urlSegment) => {
-      //         if (provider.activePaths.includes(urlSegment.path)) {
-      //           matchesPath = true;
-      //         }
-      //       })
-      //     }
-      //     return matchesPath;
-      //   })
-      //   .map(provider => provider.getSections(route, state).pipe(
-      //     tap((sections) => {
-      //       sections.forEach((section: MenuSection) => {
-      //         this.menuService.addSection(provider.menuID, {
-      //           ...section,
-      //           id: section.id ?? uuidv4(),
-      //           index: section.index ?? provider.index,
-      //           shouldPersistOnRouteChange: false,
-      //         });
-      //       });
-      //     }),
-      //     switchMap(() => this.waitForMenu$(provider.menuID)),
-      //   ))
-      ]
-    ).pipe(
         map(done => done.every(Boolean)),
       );
   }
@@ -122,78 +107,75 @@ export class MenuProviderService {
   ): Observable<boolean> {
     return combineLatest([
       ...Object.values(MenuID).map((menuID) => {
-        return this.menuService.getNonPersistentMenuSections(menuID)
+        return this.menuService.getNonPersistentMenuSections(menuID).pipe(
-          .pipe(
           take(1),
           map((sections) => {
             return {menuId: menuID, sections: sections};
-            })
+          }));
-          );
+      })])
-      })]).pipe(
+      .pipe(
         switchMap((menuSectionsPerMenu) => {
-          menuSectionsPerMenu.forEach((menu) => {
+          this.removeNonPersistentSections(menuSectionsPerMenu);
-            menu.sections.forEach((section) => {
-              this.menuService.removeSection(menu.menuId, section.id);
-            });
-          });
-
-
           return combineLatest([
-            // ...this.providers
-            //   .filter(provider => isEmpty(provider.activePaths))
-            //   .map(provider => provider.getSections(route.snapshot, state).pipe(
-
-            //     tap((sections) => {
-
-            //       sections.forEach((section: MenuSection) => {
-            //         this.menuService.addSection(provider.menuID, {
-            //           ...section,
-            //           id: section.id ?? uuidv4(),
-            //           index: section.index ?? provider.index,
-            //           shouldPersistOnRouteChange: true,
-            //         });
-            //       });
-            //     }),
-            //     switchMap(() => this.waitForMenu$(provider.menuID)),
-            //   )),
             ...this.providers
               .filter(provider => {
                 let shouldUpdate = false;
                 if (!provider.shouldPersistOnRouteChange && isNotEmpty(provider.activePaths)) {
-
                   provider.activePaths.forEach((path) => {
                     if (state.url.includes(path)) {
                       shouldUpdate = true;
                     }
                   });
-                } else {
+                } else if (!provider.shouldPersistOnRouteChange) {
-                  if (!provider.shouldPersistOnRouteChange) {
-
                   shouldUpdate = true;
                 }
-                }
-
                 return shouldUpdate;
               })
-              .map(provider => provider.getSections(route, state).pipe(
+              .map(provider => provider.getSections(route, state)
-                tap((sections) => {
+                .pipe(
-
+                  map((sections) => {
-                  sections.forEach((section: MenuSection) => {
+                    return {provider: provider, sections: sections};
-                    this.menuService.addSection(provider.menuID, {
+                  }),
-                      ...section,
+                )
-                      id: section.id ?? uuidv4(),
+              )
-                      index: section.index ?? provider.index,
+          ]);
-                      shouldPersistOnRouteChange: false,
+        }),
-                    });
+        switchMap((providerWithSections: { provider: AbstractMenuProvider, sections: PartialMenuSection[] }[]) => {
-                  });
+          const waitForMenus = providerWithSections.map((providerWithSection: {
+            provider: AbstractMenuProvider,
+            sections: PartialMenuSection[]
+          }, sectionIndex) => {
+            providerWithSection.sections.forEach((section) => {
+              this.addSection(providerWithSection, section);
+            });
+            return this.waitForMenu$(providerWithSection.provider.menuID);
+          });
+          return [waitForMenus];
         }),
-                switchMap(() => this.waitForMenu$(provider.menuID)),
-              ))]
-          ).pipe(
         map(done => done.every(Boolean)),
       );
+    // }
   }
-      )
+
-    );
+  private addSection(providerWithSection: {
+    provider: AbstractMenuProvider;
+    sections: PartialMenuSection[]
+  }, section: PartialMenuSection) {
+    this.menuService.addSection(providerWithSection.provider.menuID, {
+      ...section,
+      id: section.id ?? `${providerWithSection.provider.menuProviderId}`,
+      parentID: section.parentID ?? providerWithSection.provider.parentID,
+      index: section.index ?? providerWithSection.provider.index,
+      shouldPersistOnRouteChange: section.shouldPersistOnRouteChange ?? providerWithSection.provider.shouldPersistOnRouteChange,
+      isExpandable: section.isExpandable ?? providerWithSection.provider.isExpandable,
+    });
+  }
+
+  private removeNonPersistentSections(menuSectionsPerMenu) {
+    menuSectionsPerMenu.forEach((menu) => {
+      menu.sections.forEach((section) => {
+        this.menuService.removeSection(menu.menuId, section.id);
+      });
+    });
   }
 }

src/app/shared/menu/menu-provider.ts

@@ -18,7 +18,7 @@ import {
 } from 'rxjs';
 import { map } from 'rxjs/operators';
 import { MenuID } from './menu-id.model';
-import { MenuSection } from './menu-section.model';
+import { MenuItemModels, MenuSection } from './menu-section.model';
 import { APP_INITIALIZER, Provider, Type } from '@angular/core';
 import { APP_CONFIG } from '../../../config/app-config.interface';
 import { TransferState } from '@angular/platform-browser';
@@ -26,7 +26,19 @@ import { environment } from '../../../environments/environment';
 import { HOME_PAGE_PATH } from '../../app-routing-paths';
 import { MENU_PROVIDER } from './menu.structure';
 
-export type PartialMenuSection = Omit<MenuSection, 'id' | 'active'>;
+// export type PartialMenuSection = Omit<MenuSection, 'id' | 'active'>;
+export interface PartialMenuSection {
+  id?: string;
+  visible: boolean;
+  model: MenuItemModels;
+  parentID?: string;
+  index?: number;
+  active?: boolean;
+  shouldPersistOnRouteChange?: boolean;
+  icon?: string;
+  isExpandable?: boolean;
+}
+
 
 
 export interface MenuProvider {
@@ -37,11 +49,25 @@ export interface MenuProvider {
   getSections(route?: ActivatedRouteSnapshot, state?: RouterStateSnapshot): Observable<PartialMenuSection[]>;
 }
 
+export class MenuProviderTypeWithPaths {
+  providerType: Type<MenuProvider>;
+  paths:  string[];
+}
+
+export class MenuProviderTypeWithSubs {
+  providerType: Type<MenuProvider>;
+  childProviderTypes:  (Type<MenuProvider> | MenuProviderTypeWithPaths)[];
+}
+
 export abstract class AbstractMenuProvider implements MenuProvider {
   shouldPersistOnRouteChange = true;
   menuID?: MenuID;
+  menuProviderId?: string;
   index?: number;
   activePaths?: string[];
+  parentID?: string;
+  isExpandable = false;
+
 
   abstract getSections(route?: ActivatedRouteSnapshot, state?: RouterStateSnapshot): Observable<PartialMenuSection[]>;
 

src/app/shared/menu/menu-section.model.ts

@@ -79,4 +79,6 @@ export interface MenuSection {
    * Note that not all menus may render icons.
    */
   icon?: string;
+
+  isExpandable?: boolean;
 }

src/app/shared/menu/menu.component.ts

@@ -218,7 +218,7 @@ export class MenuComponent implements OnInit, OnDestroy {
   private getSectionComponent(section: MenuSection): Observable<GenericConstructor<AbstractMenuSectionComponent>> {
     return this.menuService.hasSubSections(this.menuID, section.id).pipe(
       map((expandable: boolean) => {
-        return getComponentForMenu(this.menuID, expandable, this.themeService.getThemeName());
+        return getComponentForMenu(this.menuID, expandable || section.isExpandable, this.themeService.getThemeName());
       }
       ),
     );

src/app/shared/menu/menu.service.ts

@@ -2,7 +2,7 @@ import { Injectable } from '@angular/core';
 import { createSelector, MemoizedSelector, select, Store } from '@ngrx/store';
 import { AppState, keySelector } from '../../app.reducer';
 import { combineLatest as observableCombineLatest, Observable } from 'rxjs';
-import { filter, map, switchMap, take } from 'rxjs/operators';
+import { filter, map, switchMap, take, tap } from 'rxjs/operators';
 import {
   ActivateMenuSectionAction,
   AddMenuSectionAction,

src/app/shared/menu/menu.structure.ts

@@ -13,13 +13,40 @@ import {
 import { MenuID } from './menu-id.model';
 import { AbstractMenuProvider } from './menu-provider';
 import { MenuProviderService } from './menu-provider.service';
+import { hasValue, isNotEmpty } from '../empty.util';
 
 export const MENU_PROVIDER = new InjectionToken<AbstractMenuProvider>('MENU_PROVIDER');
 
 type MenuStructure = {
-  [key in MenuID]: (Type<AbstractMenuProvider> | {providerType: Type<AbstractMenuProvider>, paths: string[]})[];
+  [key in MenuID]: (Type<AbstractMenuProvider> | {providerType: Type<AbstractMenuProvider>, paths: string[]} | {providerType: Type<AbstractMenuProvider>, childProviderTypes: any[]})[];
 };
 
+function resolveProvider(providerType: Type<AbstractMenuProvider> , menuID: string, index: number, paths?: string[], parentID?: string, childProviders? : Type<AbstractMenuProvider>[]) {
+  return {
+    provide: MENU_PROVIDER,
+    multi: true,
+    useFactory(provider: AbstractMenuProvider): AbstractMenuProvider {
+      provider.menuID = menuID as MenuID;
+      provider.index = provider.index ?? index;
+      if (hasValue(parentID)) {
+        provider.menuProviderId = `${parentID}_${provider.constructor.name}-${provider.index}`
+        provider.parentID = parentID;
+      } else {
+        provider.menuProviderId = `${provider.constructor.name}-${provider.index}`;
+      }
+      if (isNotEmpty(paths)) {
+        provider.activePaths = paths;
+        provider.shouldPersistOnRouteChange = false;
+      }
+      if (isNotEmpty(childProviders)) {
+        provider.shouldPersistOnRouteChange = false;
+      }
+      return provider;
+    },
+    deps: [providerType],
+  };
+}
+
 export function buildMenuStructure(structure: MenuStructure): Provider[] {
   const providers: Provider[] = [
     MenuProviderService,
@@ -29,36 +56,39 @@ export function buildMenuStructure(structure: MenuStructure): Provider[] {
     for (const [index, providerType] of providerTypes.entries()) {
       // todo: should complain if not injectable!
 
-      if (providerType.hasOwnProperty('providerType')) {
+      if (providerType.hasOwnProperty('providerType') && providerType.hasOwnProperty('paths')) {
         const providerPart = (providerType as any).providerType;
         const paths = (providerType as any).paths;
+        providers.push(providerPart);
+        providers.push(resolveProvider(providerPart, menuID, index, paths));
+      } else if (providerType.hasOwnProperty('providerType') && providerType.hasOwnProperty('childProviderTypes')){
+        const providerPart = (providerType as any).providerType;
 
+        const childProviderList = [];
+        const childProviderTypes = (providerType as any).childProviderTypes;
+        childProviderTypes.forEach((childProviderType, childIndex: number) => {
+
+
+          if (childProviderType.hasOwnProperty('providerType') && childProviderType.hasOwnProperty('paths')) {
+            const childProviderTypePart = (childProviderType as any).providerType;
+            const paths = (childProviderType as any).paths;
+            providers.push(childProviderTypePart);
+            providers.push(resolveProvider(childProviderTypePart, menuID, childIndex, paths, `${providerPart.name}-${index}`))
+            childProviderList.push(childProviderTypePart);
+          } else {
+            providers.push(childProviderType)
+            providers.push(resolveProvider(childProviderType, menuID, childIndex, undefined, `${providerPart.name}-${index}`))
+            childProviderList.push(childProviderType);
+          }
+        })
 
         providers.push(providerPart);
-        providers.push({
+        providers.push(resolveProvider(providerPart, menuID, index, undefined, undefined, childProviderList));
-          provide: MENU_PROVIDER,
+
-          multi: true,
+
-          useFactory(provider: AbstractMenuProvider): AbstractMenuProvider {
-            provider.menuID = menuID as MenuID;
-            provider.index = provider.index ?? index;
-            provider.activePaths = paths;
-            provider.shouldPersistOnRouteChange = false;
-            return provider;
-          },
-          deps: [providerPart],
-        });
       } else {
         providers.push(providerType as Type<AbstractMenuProvider> );
-        providers.push({
+        providers.push(resolveProvider(providerType as Type<AbstractMenuProvider>, menuID, index));
-          provide: MENU_PROVIDER,
-          multi: true,
-          useFactory(provider: AbstractMenuProvider): AbstractMenuProvider {
-            provider.menuID = menuID as MenuID;
-            provider.index = provider.index ?? index;
-            return provider;
-          },
-          deps: [providerType],
-        });
       }
     }
   });

src/app/shared/menu/providers/comcol-subscribe.menu.ts

@@ -35,10 +35,10 @@ export class SubscribeMenuProvider extends DSpaceObjectPageMenuProvider<Communit
     super(dsoDataService);
   }
 
-  protected isApplicable(dso: Community | Collection): boolean {
+  // protected isApplicable(dso: Community | Collection): boolean {
-    // @ts-ignore
+  //   // @ts-ignore
-    return dso.type === COMMUNITY.value || dso.type.value === COLLECTION;
+  //   return dso?.type === COMMUNITY.value || dso?.type === COLLECTION.value;
-  }
+  // }
 
   public getSectionsForContext(dso: Community | Collection): Observable<PartialMenuSection[]> {
     return combineLatest([

src/app/shared/menu/providers/dso-option-menu.service.ts

@@ -0,0 +1,30 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+
+import { Injectable } from '@angular/core';
+import { Observable, of, } from 'rxjs';
+import { MenuItemType } from '../menu-item-type.model';
+import { AbstractExpandableParentMenuProvider } from './expandable-parent-menu-provider';
+import { PartialMenuSection } from '../menu-provider';
+
+@Injectable()
+export class DsoOptionMenu extends AbstractExpandableParentMenuProvider {
+
+  public getSections(): Observable<PartialMenuSection[]> {
+    return of([
+      {
+        visible: true,
+        model: {
+          type: MenuItemType.TEXT,
+          text: `menu.section.browse_global_communities_and_collections`,
+        },
+        icon: 'diagram-project'
+      },
+    ] as PartialMenuSection[]);
+  }
+}

src/app/shared/menu/providers/expandable-menu-provider.ts

@@ -17,6 +17,7 @@ import {
   AbstractMenuProvider,
   PartialMenuSection,
 } from '../menu-provider';
+import { Type } from '@angular/core';
 
 export type MenuTopSection = Omit<PartialMenuSection, 'visible'>;
 export type MenuSubSection = Omit<PartialMenuSection, 'parentID'>;
@@ -34,7 +35,6 @@ export abstract class AbstractExpandableMenuProvider extends AbstractMenuProvide
 
   getSections(): Observable<PartialMenuSection[]> {
     const full = this.includeSubSections();
-    const parentID = uuidv4();
 
     return combineLatest([
       this.getTopSection(),
@@ -43,10 +43,11 @@ export abstract class AbstractExpandableMenuProvider extends AbstractMenuProvide
       map((
         [partialTopSection, partialSubSections]: [MenuTopSection, MenuSubSection[]]
       ) => {
-        const subSections = partialSubSections.map(partialSub => {
+        const subSections = partialSubSections.map((partialSub, index) => {
           return {
             ...partialSub,
-            parentID: parentID,
+            id: partialSub.id ?? `${this.menuProviderId}_Sub-${index}`,
+            parentID: this.menuProviderId,
           };
         });
 
@@ -54,7 +55,7 @@ export abstract class AbstractExpandableMenuProvider extends AbstractMenuProvide
           ...subSections,
           {
             ...partialTopSection,
-            id: parentID,
+            id: this.menuProviderId,
             visible: full ? subSections.some(sub => sub.visible) : this.showWithoutSubsections,
           },
         ];

src/app/shared/menu/providers/expandable-parent-menu-provider.ts

@@ -0,0 +1,37 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+import { combineLatest, Observable, of as observableOf, } from 'rxjs';
+import { map } from 'rxjs/operators';
+import {
+  AbstractMenuProvider,
+  MenuProvider,
+  MenuProviderTypeWithPaths,
+  MenuProviderTypeWithSubs,
+} from '../menu-provider';
+import { Inject, Injector, Optional, Type } from '@angular/core';
+import { AbstractExpandableMenuProvider, MenuSubSection } from './expandable-menu-provider';
+import { ActivatedRoute, ActivatedRouteSnapshot, Router, RouterStateSnapshot } from '@angular/router';
+import { isEmpty } from '../../empty.util';
+import { MENU_PROVIDER } from '../menu.structure';
+import { MenuService } from '../menu.service';
+
+
+export abstract class AbstractExpandableParentMenuProvider extends AbstractMenuProvider {
+  isExpandable = true;
+
+  public static withSubs(childProviders: (Type<MenuProvider>| MenuProviderTypeWithPaths)[]) {
+    if (!AbstractMenuProvider.isPrototypeOf(this)) {
+      throw new Error(
+        'onRoute should only be called from concrete subclasses of AbstractMenuProvider'
+      );
+    }
+
+    const providerType = this as unknown as Type<AbstractMenuProvider>;
+    return {providerType: providerType, childProviderTypes: childProviders};
+  }
+}