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
   7 @Injectable({providedIn: 'root'})
   8 export class BookingResourceBarcodeValidator implements AsyncValidator {
   9     constructor(
  10         private pcrud: PcrudService) {
  11     }
  12
  13     validate = (control: FormControl) => {
  14         return this.pcrud.search('brsrc',
  15             {'barcode' : control.value},
  16             {'limit': 1}).pipe(
  17                 switchMap(() => of(null)),
  18                 catchError((err) => {
  19                     return of({ resourceBarcode: 'No resource found with that barcode' });
  20                 }));
  21     }
  22 }
  23
  24 @Directive({
  25     selector: '[egValidBookingResourceBarcode]',
  26     providers: [{
  27         provide: NG_ASYNC_VALIDATORS,
  28         useExisting: forwardRef(() => BookingResourceBarcodeValidator),
  29         multi: true
  30     }]
  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