/** * @license * Copyright Google LLC All Rights Reserved. * * Use of this source code is governed by an MIT-style license that can be * found in the LICENSE file at https://angular.io/license */ import { composeAsyncValidators, composeValidators } from '../validators'; /** * @description * Base class for control directives. * * This class is only used internally in the `ReactiveFormsModule` and the `FormsModule`. * * @publicApi */ export class AbstractControlDirective { constructor() { /** * Set of synchronous validators as they were provided while calling `setValidators` function. * @internal */ this._rawValidators = []; /** * Set of asynchronous validators as they were provided while calling `setAsyncValidators` * function. * @internal */ this._rawAsyncValidators = []; /* * The set of callbacks to be invoked when directive instance is being destroyed. */ this._onDestroyCallbacks = []; } /** * @description * Reports the value of the control if it is present, otherwise null. */ get value() { return this.control ? this.control.value : null; } /** * @description * Reports whether the control is valid. A control is considered valid if no * validation errors exist with the current value. * If the control is not present, null is returned. */ get valid() { return this.control ? this.control.valid : null; } /** * @description * Reports whether the control is invalid, meaning that an error exists in the input value. * If the control is not present, null is returned. */ get invalid() { return this.control ? this.control.invalid : null; } /** * @description * Reports whether a control is pending, meaning that that async validation is occurring and * errors are not yet available for the input value. If the control is not present, null is * returned. */ get pending() { return this.control ? this.control.pending : null; } /** * @description * Reports whether the control is disabled, meaning that the control is disabled * in the UI and is exempt from validation checks and excluded from aggregate * values of ancestor controls. If the control is not present, null is returned. */ get disabled() { return this.control ? this.control.disabled : null; } /** * @description * Reports whether the control is enabled, meaning that the control is included in ancestor * calculations of validity or value. If the control is not present, null is returned. */ get enabled() { return this.control ? this.control.enabled : null; } /** * @description * Reports the control's validation errors. If the control is not present, null is returned. */ get errors() { return this.control ? this.control.errors : null; } /** * @description * Reports whether the control is pristine, meaning that the user has not yet changed * the value in the UI. If the control is not present, null is returned. */ get pristine() { return this.control ? this.control.pristine : null; } /** * @description * Reports whether the control is dirty, meaning that the user has changed * the value in the UI. If the control is not present, null is returned. */ get dirty() { return this.control ? this.control.dirty : null; } /** * @description * Reports whether the control is touched, meaning that the user has triggered * a `blur` event on it. If the control is not present, null is returned. */ get touched() { return this.control ? this.control.touched : null; } /** * @description * Reports the validation status of the control. Possible values include: * 'VALID', 'INVALID', 'DISABLED', and 'PENDING'. * If the control is not present, null is returned. */ get status() { return this.control ? this.control.status : null; } /** * @description * Reports whether the control is untouched, meaning that the user has not yet triggered * a `blur` event on it. If the control is not present, null is returned. */ get untouched() { return this.control ? this.control.untouched : null; } /** * @description * Returns a multicasting observable that emits a validation status whenever it is * calculated for the control. If the control is not present, null is returned. */ get statusChanges() { return this.control ? this.control.statusChanges : null; } /** * @description * Returns a multicasting observable of value changes for the control that emits every time the * value of the control changes in the UI or programmatically. * If the control is not present, null is returned. */ get valueChanges() { return this.control ? this.control.valueChanges : null; } /** * @description * Returns an array that represents the path from the top-level form to this control. * Each index is the string name of the control on that level. */ get path() { return null; } /** * Sets synchronous validators for this directive. * @internal */ _setValidators(validators) { this._rawValidators = validators || []; this._composedValidatorFn = composeValidators(this._rawValidators); } /** * Sets asynchronous validators for this directive. * @internal */ _setAsyncValidators(validators) { this._rawAsyncValidators = validators || []; this._composedAsyncValidatorFn = composeAsyncValidators(this._rawAsyncValidators); } /** * @description * Synchronous validator function composed of all the synchronous validators registered with this * directive. */ get validator() { return this._composedValidatorFn || null; } /** * @description * Asynchronous validator function composed of all the asynchronous validators registered with * this directive. */ get asyncValidator() { return this._composedAsyncValidatorFn || null; } /** * Internal function to register callbacks that should be invoked * when directive instance is being destroyed. * @internal */ _registerOnDestroy(fn) { this._onDestroyCallbacks.push(fn); } /** * Internal function to invoke all registered "on destroy" callbacks. * Note: calling this function also clears the list of callbacks. * @internal */ _invokeOnDestroyCallbacks() { this._onDestroyCallbacks.forEach(fn => fn()); this._onDestroyCallbacks = []; } /** * @description * Resets the control with the provided value if the control is present. */ reset(value = undefined) { if (this.control) this.control.reset(value); } /** * @description * Reports whether the control with the given path has the error specified. * * @param errorCode The code of the error to check * @param path A list of control names that designates how to move from the current control * to the control that should be queried for errors. * * @usageNotes * For example, for the following `FormGroup`: * * ``` * form = new FormGroup({ * address: new FormGroup({ street: new FormControl() }) * }); * ``` * * The path to the 'street' control from the root form would be 'address' -> 'street'. * * It can be provided to this method in one of two formats: * * 1. An array of string control names, e.g. `['address', 'street']` * 1. A period-delimited list of control names in one string, e.g. `'address.street'` * * If no path is given, this method checks for the error on the current control. * * @returns whether the given error is present in the control at the given path. * * If the control is not present, false is returned. */ hasError(errorCode, path) { return this.control ? this.control.hasError(errorCode, path) : false; } /** * @description * Reports error data for the control with the given path. * * @param errorCode The code of the error to check * @param path A list of control names that designates how to move from the current control * to the control that should be queried for errors. * * @usageNotes * For example, for the following `FormGroup`: * * ``` * form = new FormGroup({ * address: new FormGroup({ street: new FormControl() }) * }); * ``` * * The path to the 'street' control from the root form would be 'address' -> 'street'. * * It can be provided to this method in one of two formats: * * 1. An array of string control names, e.g. `['address', 'street']` * 1. A period-delimited list of control names in one string, e.g. `'address.street'` * * @returns error data for that particular error. 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Most properties fall through to that instance.\n   */\n  abstract get control(): AbstractControl|null;\n\n  /**\n   * @description\n   * Reports the value of the control if it is present, otherwise null.\n   */\n  get value(): any {\n    return this.control ? this.control.value : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is valid. A control is considered valid if no\n   * validation errors exist with the current value.\n   * If the control is not present, null is returned.\n   */\n  get valid(): boolean|null {\n    return this.control ? this.control.valid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is invalid, meaning that an error exists in the input value.\n   * If the control is not present, null is returned.\n   */\n  get invalid(): boolean|null {\n    return this.control ? this.control.invalid : null;\n  }\n\n  /**\n   * @description\n   * Reports whether a control is pending, meaning that that async validation is occurring and\n   * errors are not yet available for the input value. If the control is not present, null is\n   * returned.\n   */\n  get pending(): boolean|null {\n    return this.control ? this.control.pending : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is disabled, meaning that the control is disabled\n   * in the UI and is exempt from validation checks and excluded from aggregate\n   * values of ancestor controls. If the control is not present, null is returned.\n   */\n  get disabled(): boolean|null {\n    return this.control ? this.control.disabled : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is enabled, meaning that the control is included in ancestor\n   * calculations of validity or value. If the control is not present, null is returned.\n   */\n  get enabled(): boolean|null {\n    return this.control ? this.control.enabled : null;\n  }\n\n  /**\n   * @description\n   * Reports the control's validation errors. If the control is not present, null is returned.\n   */\n  get errors(): ValidationErrors|null {\n    return this.control ? this.control.errors : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is pristine, meaning that the user has not yet changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get pristine(): boolean|null {\n    return this.control ? this.control.pristine : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is dirty, meaning that the user has changed\n   * the value in the UI. If the control is not present, null is returned.\n   */\n  get dirty(): boolean|null {\n    return this.control ? this.control.dirty : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is touched, meaning that the user has triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get touched(): boolean|null {\n    return this.control ? this.control.touched : null;\n  }\n\n  /**\n   * @description\n   * Reports the validation status of the control. Possible values include:\n   * 'VALID', 'INVALID', 'DISABLED', and 'PENDING'.\n   * If the control is not present, null is returned.\n   */\n  get status(): string|null {\n    return this.control ? this.control.status : null;\n  }\n\n  /**\n   * @description\n   * Reports whether the control is untouched, meaning that the user has not yet triggered\n   * a `blur` event on it. If the control is not present, null is returned.\n   */\n  get untouched(): boolean|null {\n    return this.control ? this.control.untouched : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable that emits a validation status whenever it is\n   * calculated for the control. If the control is not present, null is returned.\n   */\n  get statusChanges(): Observable<any>|null {\n    return this.control ? this.control.statusChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns a multicasting observable of value changes for the control that emits every time the\n   * value of the control changes in the UI or programmatically.\n   * If the control is not present, null is returned.\n   */\n  get valueChanges(): Observable<any>|null {\n    return this.control ? this.control.valueChanges : null;\n  }\n\n  /**\n   * @description\n   * Returns an array that represents the path from the top-level form to this control.\n   * Each index is the string name of the control on that level.\n   */\n  get path(): string[]|null {\n    return null;\n  }\n\n  /**\n   * Contains the result of merging synchronous validators into a single validator function\n   * (combined using `Validators.compose`).\n   */\n  private _composedValidatorFn: ValidatorFn|null|undefined;\n\n  /**\n   * Contains the result of merging asynchronous validators into a single validator function\n   * (combined using `Validators.composeAsync`).\n   */\n  private _composedAsyncValidatorFn: AsyncValidatorFn|null|undefined;\n\n  /**\n   * Set of synchronous validators as they were provided while calling `setValidators` function.\n   * @internal\n   */\n  _rawValidators: Array<Validator|ValidatorFn> = [];\n\n  /**\n   * Set of asynchronous validators as they were provided while calling `setAsyncValidators`\n   * function.\n   * @internal\n   */\n  _rawAsyncValidators: Array<AsyncValidator|AsyncValidatorFn> = [];\n\n  /**\n   * Sets synchronous validators for this directive.\n   * @internal\n   */\n  _setValidators(validators: Array<Validator|ValidatorFn>|undefined): void {\n    this._rawValidators = validators || [];\n    this._composedValidatorFn = composeValidators(this._rawValidators);\n  }\n\n  /**\n   * Sets asynchronous validators for this directive.\n   * @internal\n   */\n  _setAsyncValidators(validators: Array<AsyncValidator|AsyncValidatorFn>|undefined): void {\n    this._rawAsyncValidators = validators || [];\n    this._composedAsyncValidatorFn = composeAsyncValidators(this._rawAsyncValidators);\n  }\n\n  /**\n   * @description\n   * Synchronous validator function composed of all the synchronous validators registered with this\n   * directive.\n   */\n  get validator(): ValidatorFn|null {\n    return this._composedValidatorFn || null;\n  }\n\n  /**\n   * @description\n   * Asynchronous validator function composed of all the asynchronous validators registered with\n   * this directive.\n   */\n  get asyncValidator(): AsyncValidatorFn|null {\n    return this._composedAsyncValidatorFn || null;\n  }\n\n  /*\n   * The set of callbacks to be invoked when directive instance is being destroyed.\n   */\n  private _onDestroyCallbacks: (() => void)[] = [];\n\n  /**\n   * Internal function to register callbacks that should be invoked\n   * when directive instance is being destroyed.\n   * @internal\n   */\n  _registerOnDestroy(fn: () => void): void {\n    this._onDestroyCallbacks.push(fn);\n  }\n\n  /**\n   * Internal function to invoke all registered \"on destroy\" callbacks.\n   * Note: calling this function also clears the list of callbacks.\n   * @internal\n   */\n  _invokeOnDestroyCallbacks(): void {\n    this._onDestroyCallbacks.forEach(fn => fn());\n    this._onDestroyCallbacks = [];\n  }\n\n  /**\n   * @description\n   * Resets the control with the provided value if the control is present.\n   */\n  reset(value: any = undefined): void {\n    if (this.control) this.control.reset(value);\n  }\n\n  /**\n   * @description\n   * Reports whether the control with the given path has the error specified.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * If no path is given, this method checks for the error on the current control.\n   *\n   * @returns whether the given error is present in the control at the given path.\n   *\n   * If the control is not present, false is returned.\n   */\n  hasError(errorCode: string, path?: Array<string|number>|string): boolean {\n    return this.control ? this.control.hasError(errorCode, path) : false;\n  }\n\n  /**\n   * @description\n   * Reports error data for the control with the given path.\n   *\n   * @param errorCode The code of the error to check\n   * @param path A list of control names that designates how to move from the current control\n   * to the control that should be queried for errors.\n   *\n   * @usageNotes\n   * For example, for the following `FormGroup`:\n   *\n   * ```\n   * form = new FormGroup({\n   *   address: new FormGroup({ street: new FormControl() })\n   * });\n   * ```\n   *\n   * The path to the 'street' control from the root form would be 'address' -> 'street'.\n   *\n   * It can be provided to this method in one of two formats:\n   *\n   * 1. An array of string control names, e.g. `['address', 'street']`\n   * 1. A period-delimited list of control names in one string, e.g. `'address.street'`\n   *\n   * @returns error data for that particular error. If the control or error is not present,\n   * null is returned.\n   */\n  getError(errorCode: string, path?: Array<string|number>|string): any {\n    return this.control ? this.control.getError(errorCode, path) : null;\n  }\n}\n"]}