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import { Injectable } from '@angular/core'
import { FormBuilder, FormControl, FormGroup, ValidatorFn } from '@angular/forms'
import { BuildFormArgument, BuildFormDefaultValues } from '../form-validators/form-validator.model'
import { FormReactiveErrors, FormReactiveValidationMessages } from './form-reactive'
@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 }
}
updateForm (
form: FormGroup,
formErrors: FormReactiveErrors,
validationMessages: FormReactiveValidationMessages,
obj: BuildFormArgument,
defaultValues: BuildFormDefaultValues = {}
) {
for (const name of Object.keys(obj)) {
formErrors[name] = ''
const field = obj[name]
if (this.isRecursiveField(field)) {
this.updateForm(
form[name],
formErrors[name] as FormReactiveErrors,
validationMessages[name] as FormReactiveValidationMessages,
obj[name] as BuildFormArgument,
defaultValues[name] as BuildFormDefaultValues
)
continue
}
if (field?.MESSAGES) validationMessages[name] = field.MESSAGES as { [ name: string ]: string }
const defaultValue = defaultValues[name] || ''
if (field?.VALIDATORS) form.addControl(name, new FormControl(defaultValue, field.VALIDATORS as ValidatorFn[]))
else form.addControl(name, new FormControl(defaultValue))
}
}
private isRecursiveField (field: any) {
return field && typeof field === 'object' && !field.MESSAGES && !field.VALIDATORS
}
}
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