Strict done!!

overlord/src/app/closing-stock/closing-stock-item.ts

@@ -3,4 +3,12 @@ export class ClosingStockItem {
   group: string;
   quantity: number;
   amount: number;
+
+  public constructor(init?: Partial<ClosingStockItem>) {
+    this.product = '';
+    this.group = '';
+    this.quantity = 0;
+    this.amount = 0;
+    Object.assign(this, init);
+  }
 }

overlord/src/app/closing-stock/closing-stock.component.ts

@@ -18,9 +18,9 @@ import { ClosingStockDataSource } from './closing-stock-datasource';
 export class ClosingStockComponent implements OnInit {
   @ViewChild(MatPaginator, { static: true }) paginator?: MatPaginator;
   @ViewChild(MatSort, { static: true }) sort?: MatSort;
-  dataSource: ClosingStockDataSource;
+  info: ClosingStock = new ClosingStock();
+  dataSource: ClosingStockDataSource = new ClosingStockDataSource(this.info.body);
   form: FormGroup;
-  info: ClosingStock;
   /** Columns displayed in the table. Columns IDs can be added, removed, or reordered. */
   displayedColumns = ['product', 'group', 'quantity', 'amount'];
 
@@ -44,7 +44,7 @@ export class ClosingStockComponent implements OnInit {
         date: moment(this.info.date, 'DD-MMM-YYYY').toDate(),
       });
     });
-    this.dataSource = new ClosingStockDataSource(this.paginator, this.sort, this.info.body);
+    this.dataSource = new ClosingStockDataSource(this.info.body, this.paginator, this.sort);
   }
 
   show() {
@@ -55,9 +55,9 @@ export class ClosingStockComponent implements OnInit {
   getInfo(): ClosingStock {
     const formModel = this.form.value;
 
-    return {
+    return new ClosingStock({
       date: moment(formModel.date).format('DD-MMM-YYYY'),
-    };
+    });
   }
 
   exportCsv() {

overlord/src/app/closing-stock/closing-stock.service.ts

@@ -16,7 +16,7 @@ const serviceName = 'ClosingStockService';
 export class ClosingStockService {
   constructor(private http: HttpClient, private log: ErrorLoggerService) {}
 
-  list(date: string): Observable<ClosingStock> {
+  list(date: string | null): Observable<ClosingStock> {
     const listUrl = date === null ? url : `${url}/${date}`;
     return <Observable<ClosingStock>>(
       this.http

overlord/src/app/closing-stock/closing-stock.ts

@@ -2,5 +2,11 @@ import { ClosingStockItem } from './closing-stock-item';
 
 export class ClosingStock {
   date: string;
-  body?: ClosingStockItem[];
+  body: ClosingStockItem[];
+
+  public constructor(init?: Partial<ClosingStock>) {
+    this.date = '';
+    this.body = [];
+    Object.assign(this, init);
+  }
 }