Feature: Sale Analysis is working

Fix: Cashier Checkout multiple entries

bookie/src/app/sale-analysis/sale-analysis-resolver.service.ts

@@ -0,0 +1,20 @@
+import {Injectable} from '@angular/core';
+import {ActivatedRouteSnapshot, Resolve, RouterStateSnapshot} from '@angular/router';
+import {Observable} from 'rxjs/internal/Observable';
+import {SaleAnalysis} from './sale-analysis';
+import {SaleAnalysisService} from './sale-analysis.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class SaleAnalysisResolver implements Resolve<SaleAnalysis> {
+
+  constructor(private ser: SaleAnalysisService) {
+  }
+
+  resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<SaleAnalysis> {
+    const startDate = route.queryParamMap.get('startDate') || null;
+    const finishDate = route.queryParamMap.get('finishDate') || null;
+    return this.ser.get(startDate, finishDate);
+  }
+}