@Injectable ()
export class ReportService extends HttpService {

    public selectedReports: any[] = [];

    public setSelectedReports (id: string, value: any) {
        this.selectedReports[id] = value;
    }

    public removeSelectedReports (id: string) {
         delete this.selectedReports[id];
    }
}

import { ReportService } from './';

@Component({
  providers: [ReportService]
})

export class ReportComponent {
  constructor (private reportService: ReportService) {}
}

import { ReportService } from '../';
@Component({
  template: '<a [routerLink]="['stats']">Stats</a>'
})

export class ReportHomeComponent {

  constructor (private reportService: ReportService) {
    reportService.setSelectedReports (1, 'hello')
  }
}

import { ReportService } from '../';

@Component({
})

export class ReportStatsComponent {

  constructor (private reportService: ReportService) {
    console.log(reportService.selectedReports)
  }
}

@Component({
  providers: [ReportService]
})