angular2/src/forms/model.map

Angular 2 - a web framework for modern web apps

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{isPresent} from 'angular2/src/facade/lang';\nimport {Observable, EventEmitter, ObservableWrapper} from 'angular2/src/facade/async';\nimport {StringMap, StringMapWrapper, ListWrapper, List} from 'angular2/src/facade/collection';\nimport {Validators} from './validators';\n\n/**\n * Indicates that a Control is valid, i.e. that no errors exist in the input value.\n *\n * @exportedAs angular2/forms\n */\nexport const VALID = \"VALID\";\n\n/**\n * Indicates that a Control is invalid, i.e. that an error exists in the input value.\n *\n * @exportedAs angular2/forms\n */\nexport const INVALID = \"INVALID\";\n\n//interface IControl {\n//  get value():any;\n//  validator:Function;\n//  get status():string;\n//  get valid():boolean;\n//  get errors():Map;\n//  get pristine():boolean;\n//  get dirty():boolean;\n//  updateValue(value:any){}\n//  setParent(parent){}\n//}\n\n/**\n * Omitting from external API doc as this is really an abstract internal concept.\n */\nexport class AbstractControl {\n  _value:any;\n  _status:string;\n  _errors:StringMap;\n  _pristine:boolean;\n  _parent:any; /* ControlGroup | ControlArray */\n  validator:Function;\n\n  _valueChanges:EventEmitter;\n\n  constructor(validator:Function) {\n    this.validator = validator;\n    this._pristine = true;\n  }\n\n  get value():any {\n    return this._value;\n  }\n\n  get status():string {\n    return this._status;\n  }\n\n  get valid():boolean {\n    return this._status === VALID;\n  }\n\n  get errors():StringMap {\n    return this._errors;\n  }\n\n  get pristine():boolean {\n    return this._pristine;\n  }\n\n  get dirty():boolean {\n    return ! this.pristine;\n  }\n\n  get valueChanges():Observable {\n    return this._valueChanges;\n  }\n\n  setParent(parent){\n    this._parent = parent;\n  }\n\n  _updateParent() {\n    if (isPresent(this._parent)){\n      this._parent._updateValue();\n    }\n  }\n}\n\n/**\n * Defines a part of a form that cannot be divided into other controls.\n *\n * `Control` is one of the three fundamental building blocks used to define forms in Angular, along with \n * {@link ControlGroup} and {@link ControlArray}.\n *\n * @exportedAs angular2/forms\n */\nexport class Control extends AbstractControl {\n  constructor(value:any, validator:Function = Validators.nullValidator) {\n    super(validator);\n    this._setValueErrorsStatus(value);\n    this._valueChanges = new EventEmitter();\n  }\n\n  updateValue(value:any):void {\n    this._setValueErrorsStatus(value);\n    this._pristine = false;\n\n    ObservableWrapper.callNext(this._valueChanges, this._value);\n\n    this._updateParent();\n  }\n\n  _setValueErrorsStatus(value)  {\n    this._value = value;\n    this._errors = this.validator(this);\n    this._status = isPresent(this._errors) ? INVALID : VALID;\n  }\n}\n\n/**\n * Defines a part of a form, of fixed length, that can contain other controls.\n *\n * A ControlGroup aggregates the values and errors of each {@link Control} in the group. Thus, if one of the controls \n * in a group is invalid, the entire group is invalid. Similarly, if a control changes its value, the entire group \n * changes as well.\n *\n * `ControlGroup` is one of the three fundamental building blocks used to define forms in Angular, along with \n * {@link Control} and {@link ControlArray}. {@link ControlArray} can also contain other controls, but is of variable \n * length.\n *\n * @exportedAs angular2/forms\n */\nexport class ControlGroup extends AbstractControl {\n  controls:StringMap;\n  _optionals:StringMap;\n\n  constructor(controls:StringMap, optionals:StringMap = null, validator:Function = Validators.group) {\n    super(validator);\n    this.controls = controls;\n    this._optionals = isPresent(optionals) ? optionals : {};\n\n    this._valueChanges = new EventEmitter();\n\n    this._setParentForControls();\n    this._setValueErrorsStatus();\n  }\n\n  include(controlName:string):void {\n    StringMapWrapper.set(this._optionals, controlName, true);\n    this._updateValue();\n  }\n\n  exclude(controlName:string):void {\n    StringMapWrapper.set(this._optionals, controlName, false);\n    this._updateValue();\n  }\n\n  contains(controlName:string):boolean {\n    var c = StringMapWrapper.contains(this.controls, controlName);\n    return c && this._included(controlName);\n  }\n\n  _setParentForControls() {\n    StringMapWrapper.forEach(this.controls, (control, name) => {\n      control.setParent(this);\n    });\n  }\n\n  _updateValue() {\n    this._setValueErrorsStatus();\n    this._pristine = false;\n\n    ObservableWrapper.callNext(this._valueChanges, this._value);\n\n    this._updateParent();\n  }\n\n  _setValueErrorsStatus()  {\n    this._value = this._reduceValue();\n    this._errors = this.validator(this);\n    this._status = isPresent(this._errors) ? INVALID : VALID;\n  }\n\n  _reduceValue() {\n    return this._reduceChildren({}, (acc, control, name) => {\n      acc[name] = control.value;\n      return acc;\n    });\n  }\n\n  _reduceChildren(initValue:any, fn:Function) {\n    var res = initValue;\n    StringMapWrapper.forEach(this.controls, (control, name) => {\n      if (this._included(name)) {\n        res = fn(res, control, name);\n      }\n    });\n    return res;\n  }\n\n  _included(controlName:string):boolean {\n    var isOptional = StringMapWrapper.contains(this._optionals, controlName);\n    return !isOptional || StringMapWrapper.get(this._optionals, controlName);\n  }\n}\n\n/**\n * Defines a part of a form, of variable length, that can contain other controls.\n *\n * A `ControlArray` aggregates the values and errors of each {@link Control} in the group. Thus, if one of the controls \n * in a group is invalid, the entire group is invalid. Similarly, if a control changes its value, the entire group \n * changes as well.\n *\n * `ControlArray` is one of the three fundamental building blocks used to define forms in Angular, along with \n * {@link Control} and {@link ControlGroup}. {@link ControlGroup} can also contain other controls, but is of fixed \n * length.\n *\n * @exportedAs angular2/forms\n */\nexport class ControlArray extends AbstractControl {\n  controls:List;\n\n  constructor(controls:List<AbstractControl>, validator:Function = Validators.array) {\n    super(validator);\n    this.controls = controls;\n\n    this._valueChanges = new EventEmitter();\n\n    this._setParentForControls();\n    this._setValueErrorsStatus();\n  }\n\n  at(index:number):AbstractControl {\n    return this.controls[index];\n  }\n\n  push(control:AbstractControl):void {\n    ListWrapper.push(this.controls, control);\n    control.setParent(this);\n    this._updateValue();\n  }\n\n  insert(index:number, control:AbstractControl):void {\n    ListWrapper.insert(this.controls, index, control);\n    control.setParent(this);\n    this._updateValue();\n  }\n\n  removeAt(index:number):void {\n    ListWrapper.removeAt(this.controls, index);\n    this._updateValue();\n  }\n\n  get length():number {\n    return this.controls.length;\n  }\n\n  _updateValue() {\n    this._setValueErrorsStatus();\n    this._pristine = false;\n\n    ObservableWrapper.callNext(this._valueChanges, this._value);\n\n    this._updateParent();\n  }\n\n  _setParentForControls() {\n    ListWrapper.forEach(this.controls, (control) => {\n      control.setParent(this);\n    });\n  }\n\n  _setValueErrorsStatus()  {\n    this._value = ListWrapper.map(this.controls, (c) => c.value);\n    this._errors = this.validator(this);\n    this._status = isPresent(this._errors) ? INVALID : VALID;\n  }\n}\n"]}