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(feat) : Add patient identifier validator
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projects/ngx-formentry/src/form-entry/directives/patient-identifier.directive.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,107 @@ | ||
| import { Directive, Input } from '@angular/core'; | ||
| import { | ||
| AbstractControl, | ||
| AsyncValidator, | ||
| NG_ASYNC_VALIDATORS, | ||
| ValidationErrors | ||
| } from '@angular/forms'; | ||
| import { Observable, of } from 'rxjs'; | ||
| import { | ||
| catchError, | ||
| debounceTime, | ||
| distinctUntilChanged, | ||
| map, | ||
| switchMap | ||
| } from 'rxjs/operators'; | ||
| import { HttpClient, HttpParams } from '@angular/common/http'; | ||
| import { LeafNode } from '../form-factory/form-node'; | ||
| import { Identifier } from '../value-adapters/types'; | ||
| import { Messages } from '../utils/messages'; | ||
|
|
||
| @Directive({ | ||
| selector: '[ofePatientIdentifierValidator]', | ||
| providers: [ | ||
| { | ||
| provide: NG_ASYNC_VALIDATORS, | ||
| useExisting: PatientIdentifierValidatorDirective, | ||
| multi: true | ||
| } | ||
| ] | ||
| }) | ||
| export class PatientIdentifierValidatorDirective implements AsyncValidator { | ||
| @Input('ofePatientIdentifierValidator') node: LeafNode; | ||
| @Input() currentPatientId?: string; | ||
|
|
||
| constructor(private http: HttpClient) {} | ||
|
|
||
| validate( | ||
| control: AbstractControl | ||
| ): Promise<ValidationErrors | null> | Observable<ValidationErrors | null> { | ||
| const identifier = control.value; | ||
| const currentPatientExistingIdentifier: Array<Identifier> = | ||
| this.node.form.valueProcessingInfo?.patientIdentifiers ?? []; | ||
|
|
||
| if ( | ||
| currentPatientExistingIdentifier.some( | ||
| (id) => id.identifier === identifier | ||
| ) | ||
| ) { | ||
| // Disable the control, since the identifier is already assigned to the patient | ||
| control.disable(); | ||
| return of(null); | ||
| } | ||
|
|
||
| // If the identifier is less than 3 characters, no need to validate | ||
| if (!identifier || identifier.length < 3) { | ||
| return of(null); | ||
| } | ||
|
|
||
| return of(identifier).pipe( | ||
| debounceTime(500), | ||
| distinctUntilChanged(), | ||
| switchMap((id) => this.validateIdentifier(id)), | ||
| map((response) => { | ||
| if ( | ||
| response.isAssigned && | ||
| response.patientId !== this.currentPatientId | ||
| ) { | ||
| return { | ||
| identifierTaken: { | ||
| message: Messages.identifierTaken | ||
| } | ||
| }; | ||
| } | ||
| return null; | ||
| }), | ||
| catchError(() => | ||
| of({ | ||
| identifierError: { | ||
| message: Messages.identifierError | ||
| } | ||
| }) | ||
| ) | ||
| ); | ||
| } | ||
|
|
||
| private validateIdentifier(identifier: string): Observable<any> { | ||
| // For testing purposes, change openmrsBase to the OpenMRS server you are using | ||
| const baseUrl = window?.['openmrsBase'] + '/ws/rest/v1' + '/'; | ||
| const apiUrl = `${baseUrl}patient`; | ||
|
|
||
| const params = new HttpParams().set('q', identifier); | ||
|
|
||
| return this.http.get(apiUrl, { params }).pipe( | ||
| map((response: any) => { | ||
| const results = response.results || []; | ||
| return { | ||
| isAssigned: results.length > 0, | ||
| patientId: results.length > 0 ? results[0].uuid : undefined | ||
| }; | ||
| }), | ||
| catchError((error) => { | ||
| console.error('Error searching for patient:', error); | ||
| throw error; | ||
| }) | ||
| ); | ||
| } | ||
| } |
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12 changes: 12 additions & 0 deletions
12
projects/ngx-formentry/src/form-entry/value-adapters/types/index.ts
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,12 @@ | ||
| export interface Identifier { | ||
| uuid?: string; | ||
| identifier: string; | ||
| identifierType: OpenmrsResource; | ||
| location: OpenmrsResource; | ||
| } | ||
|
|
||
| interface OpenmrsResource { | ||
| display: string; | ||
| uuid: string; | ||
| links?: Array<{ rel: string; uri: string }>; | ||
| } |
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