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form-validator.service.ts
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form-validator.service.ts
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import { Injectable } from '@angular/core'
import { AsyncValidatorFn, FormArray, FormBuilder, FormControl, FormGroup, ValidatorFn } from '@angular/forms'
import { objectKeysTyped } from '@peertube/peertube-core-utils'
import { BuildFormArgument, BuildFormDefaultValues } from '../form-validators/form-validator.model'
import { FormReactiveErrors, FormReactiveValidationMessages } from './form-reactive.service'
@Injectable()
export class FormValidatorService {
constructor (
private formBuilder: FormBuilder
) {}
buildForm (obj: BuildFormArgument, defaultValues: BuildFormDefaultValues = {}) {
const formErrors: FormReactiveErrors = {}
const validationMessages: FormReactiveValidationMessages = {}
const group: { [key: string]: any } = {}
for (const name of Object.keys(obj)) {
formErrors[name] = ''
const field = obj[name]
if (this.isRecursiveField(field)) {
const result = this.buildForm(field as BuildFormArgument, defaultValues[name] as BuildFormDefaultValues)
group[name] = result.form
formErrors[name] = result.formErrors
validationMessages[name] = result.validationMessages
continue
}
if (field?.MESSAGES) validationMessages[name] = field.MESSAGES as { [ name: string ]: string }
const defaultValue = defaultValues[name] ?? ''
if (field?.VALIDATORS) group[name] = [ defaultValue, field.VALIDATORS ]
else group[name] = [ defaultValue ]
}
const form = this.formBuilder.group(group)
return { form, formErrors, validationMessages }
}
updateFormGroup (
form: FormGroup,
formErrors: FormReactiveErrors,
validationMessages: FormReactiveValidationMessages,
formToBuild: BuildFormArgument,
defaultValues: BuildFormDefaultValues = {}
) {
for (const name of objectKeysTyped(formToBuild)) {
formErrors[name] = ''
const field = formToBuild[name]
if (this.isRecursiveField(field)) {
this.updateFormGroup(
// FIXME: typings
(form as any)[name],
formErrors[name] as FormReactiveErrors,
validationMessages[name] as FormReactiveValidationMessages,
formToBuild[name] as BuildFormArgument,
defaultValues[name] as BuildFormDefaultValues
)
continue
}
if (field?.MESSAGES) validationMessages[name] = field.MESSAGES as { [ name: string ]: string }
const defaultValue = defaultValues[name] ?? ''
form.addControl(
name + '',
new FormControl(defaultValue, field?.VALIDATORS as ValidatorFn[], field?.ASYNC_VALIDATORS as AsyncValidatorFn[])
)
}
}
addControlInFormArray (options: {
formErrors: FormReactiveErrors
validationMessages: FormReactiveValidationMessages
formArray: FormArray
controlName: string
formToBuild: BuildFormArgument
defaultValues?: BuildFormDefaultValues
}) {
const { formArray, formErrors, validationMessages, controlName, formToBuild, defaultValues = {} } = options
const formGroup = new FormGroup({})
if (!formErrors[controlName]) formErrors[controlName] = [] as FormReactiveErrors[]
if (!validationMessages[controlName]) validationMessages[controlName] = []
const formArrayErrors = formErrors[controlName] as FormReactiveErrors[]
const formArrayValidationMessages = validationMessages[controlName] as FormReactiveValidationMessages[]
const totalControls = formArray.controls.length
formArrayErrors.push({})
formArrayValidationMessages.push({})
this.updateFormGroup(
formGroup,
formArrayErrors[totalControls],
formArrayValidationMessages[totalControls],
formToBuild,
defaultValues
)
formArray.push(formGroup)
}
removeControlFromFormArray (options: {
formErrors: FormReactiveErrors
validationMessages: FormReactiveValidationMessages
index: number
formArray: FormArray
controlName: string
}) {
const { formArray, formErrors, validationMessages, index, controlName } = options
const formArrayErrors = formErrors[controlName] as FormReactiveErrors[]
const formArrayValidationMessages = validationMessages[controlName] as FormReactiveValidationMessages[]
formArrayErrors.splice(index, 1)
formArrayValidationMessages.splice(index, 1)
formArray.removeAt(index)
}
updateTreeValidity (group: FormGroup | FormArray): void {
for (const key of Object.keys(group.controls)) {
// FIXME: typings
const abstractControl = (group.controls as any)[key] as FormControl
if (abstractControl instanceof FormGroup || abstractControl instanceof FormArray) {
this.updateTreeValidity(abstractControl)
} else {
abstractControl.updateValueAndValidity({ emitEvent: false })
}
}
}
private isRecursiveField (field: any) {
return field && typeof field === 'object' && !field.MESSAGES && !field.VALIDATORS
}
}