Add no entity warning for companies and inventory

src/app/modules/company/pages/list/list.component.html

@@ -1,3 +1,8 @@
+<cre-warning-alert *ngIf="companiesEmpty">
+  <p>Il n'y a actuellement aucune bannière enregistrée dans le système.</p>
+  <p *ngIf="hasEditPermission">Vous pouvez en créer une <b><a routerLink="/catalog/company/add">ici</a></b>.</p>
+</cre-warning-alert>
+
 <cre-entity-list
   [entities$]="companies$"
   [columns]="columns"

src/app/modules/company/pages/list/list.component.ts

@@ -5,6 +5,8 @@ import {Permission} from '../../../shared/model/user'
 import {ActivatedRoute, Router} from '@angular/router'
 import {ErrorService} from '../../../shared/service/error.service'
 import {AppState} from '../../../shared/app-state'
+import {map, tap} from "rxjs/operators";
+import {AccountService} from "../../../accounts/services/account.service";
 
 @Component({
   selector: 'cre-list',
@@ -22,8 +24,11 @@ export class ListComponent extends ErrorHandlingComponent {
     permission: Permission.EDIT_COMPANIES
   }]
 
+  companiesEmpty = false
+
   constructor(
     private companyService: CompanyService,
+    private accountService: AccountService,
     private appState: AppState,
     errorService: ErrorService,
     router: Router,
@@ -31,5 +36,11 @@ export class ListComponent extends ErrorHandlingComponent {
   ) {
     super(errorService, activatedRoute, router)
     this.appState.title = 'Bannières'
+
+    this.companies$.pipe(tap(companies => this.companiesEmpty = companies.length <= 0))
+  }
+
+  get hasEditPermission(): boolean {
+    return this.accountService.hasPermission(Permission.EDIT_COMPANIES)
   }
 }

src/app/modules/material/pages/inventory/inventory.component.html

@@ -45,7 +45,14 @@
   </div>
 </div>
 
+<cre-warning-alert *ngIf="!loading && materials.length === 0">
+  <p>Il n'y a actuellement aucun produit enregistré dans le système.</p>
+  <p *ngIf="canEditMaterial">Vous pouvez en créer un <b><a routerLink="/catalog/material/add">ici</a></b>.
+  </p>
+</cre-warning-alert>
+
 <table
+  *ngIf="materials.length > 0"
   mat-table
   matSort
   class="mx-auto"

src/app/modules/material/pages/inventory/inventory.component.ts

@@ -21,7 +21,7 @@ import {AppState} from '../../../shared/app-state'
 export class InventoryComponent extends ErrorHandlingComponent {
   @ViewChild(MatSort) sort: MatSort
 
-  materials: Material[] | null
+  materials: Material[] | null = []
   materialTypes$ = this.materialTypeService.all
   dataSource: MatTableDataSource<Material>