client/src/app/shared/forms/form-reactive.ts

   1 import { FormGroup } from '@angular/forms'
   2 import { BuildFormArgument, BuildFormDefaultValues, FormValidatorService } from '@app/shared/forms/form-validators/form-validator.service'
   3
   4 export type FormReactiveErrors = { [ id: string ]: string }
   5 export type FormReactiveValidationMessages = {
   6   [ id: string ]: {
   7     [ name: string ]: string
   8   }
   9 }
  10
  11 export abstract class FormReactive {
  12   protected abstract formValidatorService: FormValidatorService
  13
  14   form: FormGroup
  15   formErrors: FormReactiveErrors
  16   validationMessages: FormReactiveValidationMessages
  17
  18   buildForm (obj: BuildFormArgument, defaultValues: BuildFormDefaultValues = {}) {
  19     const { formErrors, validationMessages, form } = this.formValidatorService.buildForm(obj, defaultValues)
  20
  21     this.form = form
  22     this.formErrors = formErrors
  23     this.validationMessages = validationMessages
  24
  25     this.form.valueChanges.subscribe(data => this.onValueChanged(false))
  26   }
  27
  28   protected onValueChanged (forceCheck = false) {
  29     for (const field in this.formErrors) {
  30       // clear previous error message (if any)
  31       this.formErrors[ field ] = ''
  32       const control = this.form.get(field)
  33
  34       // Don't care if dirty on force check
  35       const isDirty = control.dirty || forceCheck === true
  36       if (control && isDirty && !control.valid) {
  37         const messages = this.validationMessages[ field ]
  38         for (const key in control.errors) {
  39           this.formErrors[ field ] += messages[ key ] + ' '
  40         }
  41       }
  42     }
  43   }
  44
  45   protected forceCheck () {
  46     return this.onValueChanged(true)
  47   }
  48 }