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1 | import { FormGroup } from '@angular/forms' | |
2 | import { BuildFormArgument, BuildFormDefaultValues } from '../form-validators/form-validator.model' | |
3 | import { FormValidatorService } from './form-validator.service' | |
4 | ||
5 | export type FormReactiveErrors = { [ id: string ]: string | FormReactiveErrors } | |
6 | export type FormReactiveValidationMessages = { | |
7 | [ id: string ]: { [ name: string ]: string } | FormReactiveValidationMessages | |
8 | } | |
9 | ||
10 | export abstract class FormReactive { | |
11 | protected abstract formValidatorService: FormValidatorService | |
12 | protected formChanged = false | |
13 | ||
14 | form: FormGroup | |
15 | formErrors: any // To avoid casting in template because of string | 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(() => this.onValueChanged(this.form, this.formErrors, this.validationMessages, false)) | |
26 | } | |
27 | ||
28 | protected forceCheck () { | |
29 | return this.onValueChanged(this.form, this.formErrors, this.validationMessages, true) | |
30 | } | |
31 | ||
32 | protected check () { | |
33 | return this.onValueChanged(this.form, this.formErrors, this.validationMessages, false) | |
34 | } | |
35 | ||
36 | private onValueChanged ( | |
37 | form: FormGroup, | |
38 | formErrors: FormReactiveErrors, | |
39 | validationMessages: FormReactiveValidationMessages, | |
40 | forceCheck = false | |
41 | ) { | |
42 | for (const field of Object.keys(formErrors)) { | |
43 | if (formErrors[field] && typeof formErrors[field] === 'object') { | |
44 | this.onValueChanged( | |
45 | form.controls[field] as FormGroup, | |
46 | formErrors[field] as FormReactiveErrors, | |
47 | validationMessages[field] as FormReactiveValidationMessages, | |
48 | forceCheck | |
49 | ) | |
50 | continue | |
51 | } | |
52 | ||
53 | // clear previous error message (if any) | |
54 | formErrors[field] = '' | |
55 | const control = form.get(field) | |
56 | ||
57 | if (control.dirty) this.formChanged = true | |
58 | ||
59 | if (forceCheck) control.updateValueAndValidity({ emitEvent: false }) | |
60 | if (!control || !control.dirty || !control.enabled || control.valid) continue | |
61 | ||
62 | const staticMessages = validationMessages[field] | |
63 | for (const key of Object.keys(control.errors)) { | |
64 | const formErrorValue = control.errors[key] | |
65 | ||
66 | // Try to find error message in static validation messages first | |
67 | // Then check if the validator returns a string that is the error | |
68 | if (typeof formErrorValue === 'boolean') formErrors[field] += staticMessages[key] + ' ' | |
69 | else if (typeof formErrorValue === 'string') formErrors[field] += control.errors[key] | |
70 | else throw new Error('Form error value of ' + field + ' is invalid') | |
71 | } | |
72 | } | |
73 | } | |
74 | ||
75 | } |