@bsachref/ng-form
Version:
A dynamic form component for Angular using PrimeNG or Angular Material
113 lines • 15.2 kB
JavaScript
import { CommonModule } from '@angular/common';
import { ChangeDetectionStrategy, Component, input, output, } from '@angular/core';
import { ReactiveFormsModule, FormsModule, Validators, } from '@angular/forms';
import { BehaviorSubject } from 'rxjs';
import { ValidationMessagesComponent } from './validation-messages/validation-messages.component';
import * as i0 from "@angular/core";
import * as i1 from "@angular/forms";
export class BaseFormsComponent {
fb;
cdr;
formName = input.required();
controls = input.required();
formSubmit = output();
form;
formChanges$ = new BehaviorSubject(false);
constructor(fb, cdr) {
this.fb = fb;
this.cdr = cdr;
}
ngOnInit() {
this.initializeForm();
}
initializeForm() {
const formControls = {};
this.controls().forEach((control) => {
formControls[control.name] = [
control.value ?? '',
this.getValidators(control),
];
});
this.form = this.fb.group(formControls);
this.controls().forEach((control) => {
const formControl = this.form.get(control.name);
if (formControl) {
formControl.valueChanges.subscribe((value) => {
// Only update validators if the value actually changes
if (formControl.value !== value) {
this.updateValidators(formControl, value);
}
});
}
});
this.formChanges$.subscribe(() => this.cdr.markForCheck());
}
getValidators(control) {
const validators = [];
if (control.validators) {
control.validators.forEach((validator) => {
if (validator.required)
validators.push(Validators.required);
if (validator.minlength)
validators.push(Validators.minLength(validator.minlength));
if (validator.maxlength)
validators.push(Validators.maxLength(validator.maxlength));
if (validator.pattern)
validators.push(Validators.pattern(validator.pattern));
if (validator.email)
validators.push(Validators.email);
if (validator.custom)
validators.push(validator.custom);
});
}
return validators;
}
updateValidators(control, value) {
const requiresValidation = this.shouldRequireValidation(value);
// Check if the validators need to be updated
const hasRequiredValidator = control.hasValidator(Validators.required);
if (requiresValidation && !hasRequiredValidator) {
control.addValidators(Validators.required);
control.updateValueAndValidity();
}
else if (!requiresValidation && hasRequiredValidator) {
control.removeValidators(Validators.required);
control.updateValueAndValidity();
}
this.formChanges$.next(true);
}
shouldRequireValidation(value) {
return value !== null && value !== '';
}
onSubmit() {
this.form.markAllAsTouched();
this.form.markAsDirty();
this.form.updateValueAndValidity();
if (this.form.valid) {
this.formSubmit.emit(this.form.value);
this.form.reset();
}
else {
console.error('Form Invalid');
}
this.formChanges$.next(true);
}
static ɵfac = i0.ɵɵngDeclareFactory({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: BaseFormsComponent, deps: [{ token: i1.FormBuilder }, { token: i0.ChangeDetectorRef }], target: i0.ɵɵFactoryTarget.Component });
static ɵcmp = i0.ɵɵngDeclareComponent({ minVersion: "17.1.0", version: "18.2.13", type: BaseFormsComponent, isStandalone: true, selector: "base-forms", inputs: { formName: { classPropertyName: "formName", publicName: "formName", isSignal: true, isRequired: true, transformFunction: null }, controls: { classPropertyName: "controls", publicName: "controls", isSignal: true, isRequired: true, transformFunction: null } }, outputs: { formSubmit: "formSubmit" }, ngImport: i0, template: '', isInline: true, dependencies: [{ kind: "ngmodule", type: CommonModule }, { kind: "ngmodule", type: ReactiveFormsModule }, { kind: "ngmodule", type: FormsModule }], changeDetection: i0.ChangeDetectionStrategy.OnPush });
}
i0.ɵɵngDeclareClassMetadata({ minVersion: "12.0.0", version: "18.2.13", ngImport: i0, type: BaseFormsComponent, decorators: [{
type: Component,
args: [{
selector: 'base-forms',
standalone: true,
imports: [
CommonModule,
ReactiveFormsModule,
FormsModule,
ValidationMessagesComponent,
],
template: '',
changeDetection: ChangeDetectionStrategy.OnPush,
}]
}], ctorParameters: () => [{ type: i1.FormBuilder }, { type: i0.ChangeDetectorRef }] });
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{ CommonModule } from '@angular/common';\nimport {\n  ChangeDetectionStrategy,\n  ChangeDetectorRef,\n  Component,\n  input,\n  output,\n} from '@angular/core';\nimport {\n  ReactiveFormsModule,\n  FormsModule,\n  FormGroup,\n  FormBuilder,\n  ValidatorFn,\n  Validators,\n  AbstractControl,\n} from '@angular/forms';\nimport { BehaviorSubject } from 'rxjs';\nimport { ValidationMessagesComponent } from './validation-messages/validation-messages.component';\nimport { FormControlConfig } from '../public-api';\n\n@Component({\n  selector: 'base-forms',\n  standalone: true,\n  imports: [\n    CommonModule,\n    ReactiveFormsModule,\n    FormsModule,\n    ValidationMessagesComponent,\n  ],\n  template: '',\n  changeDetection: ChangeDetectionStrategy.OnPush,\n})\nexport class BaseFormsComponent {\n  formName = input.required<string>();\n  controls = input.required<FormControlConfig[]>();\n  formSubmit = output<Record<string, any>>();\n\n  form!: FormGroup;\n  protected formChanges$ = new BehaviorSubject<boolean>(false);\n\n  constructor(\n    protected fb: FormBuilder,\n    protected cdr: ChangeDetectorRef,\n  ) {}\n\n  ngOnInit(): void {\n    this.initializeForm();\n  }\n\n  protected initializeForm(): void {\n    const formControls: { [key: string]: any } = {};\n\n    this.controls().forEach((control) => {\n      formControls[control.name] = [\n        control.value ?? '',\n        this.getValidators(control),\n      ];\n    });\n\n    this.form = this.fb.group(formControls);\n\n    this.controls().forEach((control) => {\n      const formControl = this.form.get(control.name);\n      if (formControl) {\n        formControl.valueChanges.subscribe((value) => {\n          // Only update validators if the value actually changes\n          if (formControl.value !== value) {\n            this.updateValidators(formControl, value);\n          }\n        });\n      }\n    });\n\n    this.formChanges$.subscribe(() => this.cdr.markForCheck());\n  }\n\n  protected getValidators(control: FormControlConfig): ValidatorFn[] {\n    const validators: ValidatorFn[] = [];\n\n    if (control.validators) {\n      control.validators.forEach((validator) => {\n        if (validator.required) validators.push(Validators.required);\n        if (validator.minlength)\n          validators.push(Validators.minLength(validator.minlength));\n        if (validator.maxlength)\n          validators.push(Validators.maxLength(validator.maxlength));\n        if (validator.pattern)\n          validators.push(Validators.pattern(validator.pattern));\n        if (validator.email) validators.push(Validators.email);\n        if (validator.custom) validators.push(validator.custom);\n      });\n    }\n\n    return validators;\n  }\n\n  protected updateValidators(control: AbstractControl, value: any): void {\n    const requiresValidation = this.shouldRequireValidation(value);\n\n    // Check if the validators need to be updated\n    const hasRequiredValidator = control.hasValidator(Validators.required);\n\n    if (requiresValidation && !hasRequiredValidator) {\n      control.addValidators(Validators.required);\n      control.updateValueAndValidity();\n    } else if (!requiresValidation && hasRequiredValidator) {\n      control.removeValidators(Validators.required);\n      control.updateValueAndValidity();\n    }\n\n    this.formChanges$.next(true);\n  }\n\n  protected shouldRequireValidation(value: any): boolean {\n    return value !== null && value !== '';\n  }\n\n  onSubmit(): void {\n    this.form.markAllAsTouched();\n    this.form.markAsDirty();\n    this.form.updateValueAndValidity();\n\n    if (this.form.valid) {\n      this.formSubmit.emit(this.form.value);\n      this.form.reset();\n    } else {\n      console.error('Form Invalid');\n    }\n\n    this.formChanges$.next(true);\n  }\n}"]}