ToCsvService to escape the fields during exportCsv.

Auth Interceptor to check for logged out user.

overlord/src/app/shared/to-csv.service.spec.ts

@@ -0,0 +1,15 @@
+import { TestBed, inject } from '@angular/core/testing';
+
+import { ToCsvService } from './to-csv.service';
+
+describe('ToCsvService', () => {
+  beforeEach(() => {
+    TestBed.configureTestingModule({
+      providers: [ToCsvService]
+    });
+  });
+
+  it('should be created', inject([ToCsvService], (service: ToCsvService) => {
+    expect(service).toBeTruthy();
+  }));
+});

overlord/src/app/shared/to-csv.service.ts

@@ -0,0 +1,18 @@
+import {Injectable} from '@angular/core';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class ToCsvService {
+
+  constructor() {
+  }
+
+  toCsv(headers: any, data: any[]): string {
+    const header = Object.keys(headers);
+    const replacer = (key, value) => value === null ? '' : value;
+    const csv = data.map(row => header.map(fieldName => JSON.stringify(row[headers[fieldName]], replacer)).join(','));
+    csv.unshift(header.join(','));
+    return csv.join('\r\n');
+  }
+}