Open-ILS/src/eg2/src/app/staff/booking/booking_resource_validator.directive.ts

   1 import {Directive, forwardRef, Injectable} from '@angular/core';
   2 import {NG_ASYNC_VALIDATORS, AsyncValidator, FormControl} from '@angular/forms';
   3 import {of} from 'rxjs';
   4 import {switchMap, catchError} from 'rxjs/operators';
   5 import {PcrudService} from '@eg/core/pcrud.service';
   6 import {BookingModule} from './booking.module';
   7
   8 @Injectable({providedIn: BookingModule})
   9 export class BookingResourceBarcodeValidator implements AsyncValidator {
  10     constructor(
  11         private pcrud: PcrudService) {
  12     }
  13
  14     validate = (control: FormControl) => {
  15         return this.pcrud.search('brsrc',
  16             {'barcode' : control.value},
  17             {'limit': 1}).pipe(
  18                 switchMap(() => of(null)),
  19                 catchError((err) => {
  20                     return of({ resourceBarcode: 'No resource found with that barcode' });
  21                 }));
  22     }
  23 }
  24
  25 @Directive({
  26     selector: '[egValidBookingResourceBarcode]',
  27     providers: [{
  28         provide: NG_ASYNC_VALIDATORS,
  29         useExisting: forwardRef(() => BookingResourceBarcodeValidator),
  30         multi: true
  31     }]
  32 })
  33 export class BookingResourceBarcodeValidatorDirective {
  34     constructor(
  35         private validator: BookingResourceBarcodeValidator
  36     ) { }
  37
  38     validate = (control: FormControl) => {
  39         this.validator.validate(control);
  40     }
  41 }
  42