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   protected formChanged = false
  14
  15   form: FormGroup
  16   formErrors: FormReactiveErrors
  17   validationMessages: FormReactiveValidationMessages
  18
  19   buildForm (obj: BuildFormArgument, defaultValues: BuildFormDefaultValues = {}) {
  20     const { formErrors, validationMessages, form } = this.formValidatorService.buildForm(obj, defaultValues)
  21
  22     this.form = form
  23     this.formErrors = formErrors
  24     this.validationMessages = validationMessages
  25
  26     this.form.valueChanges.subscribe(() => this.onValueChanged(false))
  27   }
  28
  29   protected onValueChanged (forceCheck = false) {
  30     for (const field in this.formErrors) {
  31       // clear previous error message (if any)
  32       this.formErrors[ field ] = ''
  33       const control = this.form.get(field)
  34
  35       if (control.dirty) this.formChanged = true
  36
  37       // Don't care if dirty on force check
  38       const isDirty = control.dirty || forceCheck === true
  39       if (control && isDirty && !control.valid) {
  40         const messages = this.validationMessages[ field ]
  41         for (const key in control.errors) {
  42           this.formErrors[ field ] += messages[ key ] + ' '
  43         }
  44       }
  45     }
  46   }
  47
  48   protected forceCheck () {
  49     return this.onValueChanged(true)
  50   }
  51 }