62 lines
1.9 KiB
TypeScript
62 lines
1.9 KiB
TypeScript
import {isBlank, isPresent} from 'angular2/src/core/facade/lang';
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import {ListWrapper, StringMapWrapper} from 'angular2/src/core/facade/collection';
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import * as modelModule from './model';
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/**
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* Provides a set of validators used by form controls.
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*
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* # Example
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*
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* ```
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* var loginControl = new Control("", Validators.required)
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* ```
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*/
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export class Validators {
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static required(c: modelModule.Control): StringMap<string, boolean> {
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return isBlank(c.value) || c.value == "" ? {"required": true} : null;
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}
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static nullValidator(c: any): StringMap<string, boolean> { return null; }
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static compose(validators: Function[]): Function {
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return function(c: modelModule.Control) {
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var res = ListWrapper.reduce(validators, (res, validator) => {
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var errors = validator(c);
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return isPresent(errors) ? StringMapWrapper.merge(res, errors) : res;
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}, {});
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return StringMapWrapper.isEmpty(res) ? null : res;
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};
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}
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static group(c: modelModule.ControlGroup): StringMap<string, boolean> {
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var res = {};
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StringMapWrapper.forEach(c.controls, (control, name) => {
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if (c.contains(name) && isPresent(control.errors)) {
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Validators._mergeErrors(control, res);
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}
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});
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return StringMapWrapper.isEmpty(res) ? null : res;
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}
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static array(c: modelModule.ControlArray): StringMap<string, boolean> {
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var res = {};
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ListWrapper.forEach(c.controls, (control) => {
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if (isPresent(control.errors)) {
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Validators._mergeErrors(control, res);
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}
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});
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return StringMapWrapper.isEmpty(res) ? null : res;
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}
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static _mergeErrors(control: modelModule.AbstractControl, res: StringMap<string, any[]>): void {
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StringMapWrapper.forEach(control.errors, (value, error) => {
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if (!StringMapWrapper.contains(res, error)) {
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res[error] = [];
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}
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var current: any[] = res[error];
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current.push(control);
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});
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}
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}
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