81 lines
2.5 KiB
JavaScript
81 lines
2.5 KiB
JavaScript
import {StringMapWrapper, ListWrapper, List} from 'angular2/src/facade/collection';
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import {isPresent} from 'angular2/src/facade/lang';
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import * as modelModule from './model';
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/**
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* Creates a form object from a user-specified configuration.
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*
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* # Example
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*
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* This example creates a [ControlGroup] that consists of a `login` [Control], and a nested [ControlGroup] that defines
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* a `password` and a `passwordConfirmation` [Control].
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*
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* ```
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* var loginForm = builder.group({
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* login: ["", Validators.required],
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*
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* passwordRetry: builder.group({
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* password: ["", Validators.required],
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* passwordConfirmation: ["", Validators.required]
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* })
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* });
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*
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* ```
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* @exportedAs angular2/forms
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*/
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export class FormBuilder {
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group(controlsConfig, extra = null):modelModule.ControlGroup {
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var controls = this._reduceControls(controlsConfig);
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var optionals = isPresent(extra) ? StringMapWrapper.get(extra, "optionals") : null;
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var validator = isPresent(extra) ? StringMapWrapper.get(extra, "validator") : null;
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if (isPresent(validator)) {
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return new modelModule.ControlGroup(controls, optionals, validator);
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} else {
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return new modelModule.ControlGroup(controls, optionals);
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}
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}
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control(value, validator:Function = null):modelModule.Control {
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if (isPresent(validator)) {
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return new modelModule.Control(value, validator);
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} else {
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return new modelModule.Control(value);
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}
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}
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array(controlsConfig:List, validator:Function = null):modelModule.ControlArray {
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var controls = ListWrapper.map(controlsConfig, (c) => this._createControl(c));
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if (isPresent(validator)) {
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return new modelModule.ControlArray(controls, validator);
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} else {
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return new modelModule.ControlArray(controls);
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}
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}
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_reduceControls(controlsConfig) {
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var controls = {};
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StringMapWrapper.forEach(controlsConfig, (controlConfig, controlName) => {
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controls[controlName] = this._createControl(controlConfig);
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});
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return controls;
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}
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_createControl(controlConfig) {
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if (controlConfig instanceof modelModule.Control ||
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controlConfig instanceof modelModule.ControlGroup ||
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controlConfig instanceof modelModule.ControlArray) {
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return controlConfig;
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} else if (ListWrapper.isList(controlConfig)) {
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var value = ListWrapper.get(controlConfig, 0);
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var validator = controlConfig.length > 1 ? controlConfig[1] : null;
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return this.control(value, validator);
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} else {
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return this.control(controlConfig);
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}
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}
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}
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