Open-ILS/src/eg2/src/app/share/validators/patron_barcode_validator.directive.ts

   1 import { Directive, forwardRef, Injectable } from '@angular/core';
   2 import { NG_ASYNC_VALIDATORS, AsyncValidator, FormControl } from '@angular/forms';
   3 import {NetService} from '@eg/core/net.service';
   4 import {AuthService} from '@eg/core/auth.service';
   5 import {EmptyError, Observable, SequenceError, of} from 'rxjs';
   6 import {single, switchMap, catchError} from 'rxjs/operators';
   7
   8 @Injectable({providedIn: 'root'})
   9 export class PatronBarcodeValidator implements AsyncValidator {
  10     constructor(
  11         private auth: AuthService,
  12         private net: NetService) {
  13     }
  14
  15     validate = (control: FormControl) => {
  16         return this.parseActorCall(this.net.request(
  17             'open-ils.actor',
  18             'open-ils.actor.get_barcodes',
  19             this.auth.token(),
  20             this.auth.user().ws_ou(),
  21             'actor', control.value.trim()));
  22     };
  23
  24     private parseActorCall = (actorCall: Observable<any>) => {
  25         return actorCall
  26             .pipe(single(),
  27                 switchMap(() => of(null)),
  28                 catchError((err: unknown) => {
  29                     if (err instanceof EmptyError) {
  30                         return of({ patronBarcode: 'No patron found with that barcode' });
  31                     } else if (err instanceof SequenceError) {
  32                         return of({ patronBarcode: 'Barcode matches more than one patron' });
  33                     }
  34                 }));
  35     };
  36 }
  37
  38 @Directive({
  39     selector: '[egValidPatronBarcode]',
  40     providers: [{
  41         provide: NG_ASYNC_VALIDATORS,
  42         useExisting: forwardRef(() => PatronBarcodeValidator),
  43         multi: true
  44     }]
  45 })
  46 export class PatronBarcodeValidatorDirective {
  47     constructor(
  48         private pbv: PatronBarcodeValidator
  49     ) { }
  50
  51     validate = (control: FormControl) => {
  52         this.pbv.validate(control);
  53     };
  54 }
  55