consent.guard.ts

import { Injectable } from '@angular/core';
import {
  ActivatedRouteSnapshot,
  CanActivate,
  RouterStateSnapshot,
} from '@angular/router';
import { BackendService } from '@damap/core';
import { ConsentComponent } from '../components/consent/consent.component';
import { MatDialog } from '@angular/material/dialog';

@Injectable()
export class ConsentGuard implements CanActivate {
  public consentGiven: boolean;
  public consent;

  constructor(
    private backendService: BackendService,
    private dialog: MatDialog,
  ) {
    this.consentGiven = true;
  }

  canActivate(
    route: ActivatedRouteSnapshot,
    state: RouterStateSnapshot,
  ): boolean {
    const consentResponse = this.backendService.getConsentGiven();
    consentResponse.subscribe(response => {
      if (response) {
        this.consentGiven = true;
      } else {
        this.consentGiven = false;
        let dialogRef = this.dialog.open(ConsentComponent, {
          disableClose: true,
        });
        dialogRef.afterClosed().subscribe(result => {
          if (result) {
            this.consentGiven = true;
            this.consent = { consentGiven: true }; //create consentDO object to send
            this.backendService.editConsent(this.consent).subscribe();
          }
        });
      }
    });

    return this.consentGiven;
  }
}