Blacked and isorted the python files

Prettied and eslinted the typescript/html files

bookie/src/app/discount-report/discount-report.service.ts

@@ -1,36 +1,33 @@
+import { HttpClient, HttpParams } from '@angular/common/http';
 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 { DiscountReport } from './discount-report';
+import { catchError } from 'rxjs/operators';
+
 import { ErrorLoggerService } from '../core/error-logger.service';
 
-const httpOptions = {
-  headers: new HttpHeaders({'Content-Type': 'application/json'})
-};
+import { DiscountReport } from './discount-report';
 
 const url = '/api/discount-report';
 const serviceName = 'DiscountReportService';
 
 @Injectable({
-  providedIn: 'root'
+  providedIn: 'root',
 })
 export class DiscountReportService {
-
-  constructor(private http: HttpClient, private log: ErrorLoggerService) {
-  }
+  constructor(private http: HttpClient, private log: ErrorLoggerService) {}
 
   get(startDate: string, finishDate): Observable<DiscountReport> {
-    const options = {params: new HttpParams()};
+    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<DiscountReport>>this.http.get<DiscountReport>(url, options)
-      .pipe(
-        catchError(this.log.handleError(serviceName, 'get'))
-      );
+    return <Observable<DiscountReport>>(
+      this.http
+        .get<DiscountReport>(url, options)
+        .pipe(catchError(this.log.handleError(serviceName, 'get')))
+    );
   }
 }