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1 | import { Injectable } from '@angular/core' | |
2 | import { FormBuilder, FormControl, FormGroup, ValidatorFn } from '@angular/forms' | |
3 | import { BuildFormArgument, BuildFormDefaultValues } from '../form-validators/form-validator.model' | |
4 | import { FormReactiveErrors, FormReactiveValidationMessages } from './form-reactive' | |
5 | ||
6 | @Injectable() | |
7 | export class FormValidatorService { | |
8 | ||
9 | constructor ( | |
10 | private formBuilder: FormBuilder | |
11 | ) {} | |
12 | ||
13 | buildForm (obj: BuildFormArgument, defaultValues: BuildFormDefaultValues = {}) { | |
14 | const formErrors: FormReactiveErrors = {} | |
15 | const validationMessages: FormReactiveValidationMessages = {} | |
16 | const group: { [key: string]: any } = {} | |
17 | ||
18 | for (const name of Object.keys(obj)) { | |
19 | formErrors[name] = '' | |
20 | ||
21 | const field = obj[name] | |
22 | if (this.isRecursiveField(field)) { | |
23 | const result = this.buildForm(field as BuildFormArgument, defaultValues[name] as BuildFormDefaultValues) | |
24 | group[name] = result.form | |
25 | formErrors[name] = result.formErrors | |
26 | validationMessages[name] = result.validationMessages | |
27 | ||
28 | continue | |
29 | } | |
30 | ||
31 | if (field && field.MESSAGES) validationMessages[name] = field.MESSAGES as { [ name: string ]: string } | |
32 | ||
33 | const defaultValue = defaultValues[name] || '' | |
34 | ||
35 | if (field && field.VALIDATORS) group[name] = [ defaultValue, field.VALIDATORS ] | |
36 | else group[name] = [ defaultValue ] | |
37 | } | |
38 | ||
39 | const form = this.formBuilder.group(group) | |
40 | return { form, formErrors, validationMessages } | |
41 | } | |
42 | ||
43 | updateForm ( | |
44 | form: FormGroup, | |
45 | formErrors: FormReactiveErrors, | |
46 | validationMessages: FormReactiveValidationMessages, | |
47 | obj: BuildFormArgument, | |
48 | defaultValues: BuildFormDefaultValues = {} | |
49 | ) { | |
50 | for (const name of Object.keys(obj)) { | |
51 | formErrors[name] = '' | |
52 | ||
53 | const field = obj[name] | |
54 | if (this.isRecursiveField(field)) { | |
55 | this.updateForm( | |
56 | form[name], | |
57 | formErrors[name] as FormReactiveErrors, | |
58 | validationMessages[name] as FormReactiveValidationMessages, | |
59 | obj[name] as BuildFormArgument, | |
60 | defaultValues[name] as BuildFormDefaultValues | |
61 | ) | |
62 | continue | |
63 | } | |
64 | ||
65 | if (field && field.MESSAGES) validationMessages[name] = field.MESSAGES as { [ name: string ]: string } | |
66 | ||
67 | const defaultValue = defaultValues[name] || '' | |
68 | ||
69 | if (field && field.VALIDATORS) form.addControl(name, new FormControl(defaultValue, field.VALIDATORS as ValidatorFn[])) | |
70 | else form.addControl(name, new FormControl(defaultValue)) | |
71 | } | |
72 | } | |
73 | ||
74 | private isRecursiveField (field: any) { | |
75 | return field && typeof field === 'object' && !field.MESSAGES && !field.VALIDATORS | |
76 | } | |
77 | } |