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import { AbstractControl, FormGroup } from '@angular/forms'
import { wait } from '@root-helpers/utils'
import { BuildFormArgument, BuildFormDefaultValues } from '../form-validators/form-validator.model'
import { FormReactiveErrors, FormReactiveValidationMessages } from './form-reactive.service'
import { FormValidatorService } from './form-validator.service'
export abstract class FormReactive {
protected abstract formValidatorService: FormValidatorService
protected formChanged = false
form: FormGroup
formErrors: any // To avoid casting in template because of string | FormReactiveErrors
validationMessages: FormReactiveValidationMessages
buildForm (obj: BuildFormArgument, defaultValues: BuildFormDefaultValues = {}) {
const { formErrors, validationMessages, form } = this.formValidatorService.buildForm(obj, defaultValues)
this.form = form
this.formErrors = formErrors
this.validationMessages = validationMessages
this.form.statusChanges.subscribe(async () => {
// FIXME: remove when https://github.com/angular/angular/issues/41519 is fixed
await this.waitPendingCheck()
this.onStatusChanged(this.form, this.formErrors, this.validationMessages)
})
}
protected async waitPendingCheck () {
if (this.form.status !== 'PENDING') return
// FIXME: the following line does not work: https://github.com/angular/angular/issues/41519
// return firstValueFrom(this.form.statusChanges.pipe(filter(status => status !== 'PENDING')))
// So we have to fallback to active wait :/
do {
await wait(10)
} while (this.form.status === 'PENDING')
}
protected markAllAsDirty (controlsArg?: { [ key: string ]: AbstractControl }) {
const controls = controlsArg || this.form.controls
for (const key of Object.keys(controls)) {
const control = controls[key]
if (control instanceof FormGroup) {
this.markAllAsDirty(control.controls)
continue
}
control.markAsDirty()
}
}
protected forceCheck () {
this.onStatusChanged(this.form, this.formErrors, this.validationMessages, false)
}
private onStatusChanged (
form: FormGroup,
formErrors: FormReactiveErrors,
validationMessages: FormReactiveValidationMessages,
onlyDirty = true
) {
for (const field of Object.keys(formErrors)) {
if (formErrors[field] && typeof formErrors[field] === 'object') {
this.onStatusChanged(
form.controls[field] as FormGroup,
formErrors[field] as FormReactiveErrors,
validationMessages[field] as FormReactiveValidationMessages,
onlyDirty
)
continue
}
// clear previous error message (if any)
formErrors[field] = ''
const control = form.get(field)
if (control.dirty) this.formChanged = true
if (!control || (onlyDirty && !control.dirty) || !control.enabled || !control.errors) continue
const staticMessages = validationMessages[field]
for (const key of Object.keys(control.errors)) {
const formErrorValue = control.errors[key]
// Try to find error message in static validation messages first
// Then check if the validator returns a string that is the error
if (staticMessages[key]) formErrors[field] += staticMessages[key] + ' '
else if (typeof formErrorValue === 'string') formErrors[field] += control.errors[key]
else throw new Error('Form error value of ' + field + ' is invalid')
}
}
}
}
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