Product Sale Module done (Sales Detail) -- need to rename the permission

bookie/src/app/product-sale-report/product-sale-report.service.ts

@@ -0,0 +1,36 @@
+import { Injectable } from '@angular/core';
+import { catchError } from 'rxjs/operators';
+import { Observable } from 'rxjs/internal/Observable';
+import { HttpClient, HttpHeaders, HttpParams } from '@angular/common/http';
+import { ProductSaleReport } from './product-sale-report';
+import { ErrorLoggerService } from '../core/error-logger.service';
+
+const httpOptions = {
+  headers: new HttpHeaders({'Content-Type': 'application/json'})
+};
+
+const url = '/v1/product-sale-report';
+const serviceName = 'ProductSaleReportService';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ProductSaleReportService {
+
+  constructor(private http: HttpClient, private log: ErrorLoggerService) {
+  }
+
+  get(startDate: string, finishDate): Observable<ProductSaleReport> {
+    const options = {params: new HttpParams()};
+    if (startDate !== null) {
+      options.params = options.params.set('s', startDate);
+    }
+    if (finishDate !== null) {
+      options.params = options.params.set('f', finishDate);
+    }
+    return <Observable<ProductSaleReport>>this.http.get<ProductSaleReport>(url, options)
+      .pipe(
+        catchError(this.log.handleError(serviceName, 'get'))
+      );
+  }
+}