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field.js

import $ from 'jquery';
import Constraint from './constraint';
import UI from './ui';
import Utils from './utils';

var Field = function (field, domOptions, options, parsleyFormInstance) {
  this.__class__ = 'Field';

  this.element = field;
  this.$element = $(field);

Set parent if we have one

  if ('undefined' !== typeof parsleyFormInstance) {
    this.parent = parsleyFormInstance;
  }

  this.options = options;
  this.domOptions = domOptions;

Initialize some properties

  this.constraints = [];
  this.constraintsByName = {};
  this.validationResult = true;

Bind constraints

  this._bindConstraints();
};

var statusMapping = {pending: null, resolved: true, rejected: false};

Field.prototype = {

Public API

Validate field and trigger some events for mainly UI @returns true, an array of the validators that failed, or null if validation is not finished. Prefer using whenValidate

  validate: function (options) {
    if (arguments.length >= 1 && !$.isPlainObject(options)) {
      Utils.warnOnce('Calling validate on a parsley field without passing arguments as an object is deprecated.');
      options = {options};
    }
    var promise = this.whenValidate(options);
    if (!promise)  // If excluded with `group` option
      return true;
    switch (promise.state()) {
      case 'pending': return null;
      case 'resolved': return true;
      case 'rejected': return this.validationResult;
    }
  },

¶

Validate field and trigger some events for mainly UI @returns a promise that succeeds only when all validations do or undefined if field is not in the given group.
```
  whenValidate: function ({force, group} =  {}) {
```

do not validate a field if not the same as given validation group

    this.refreshConstraints();
    if (group && !this._isInGroup(group))
      return;

    this.value = this.getValue();

Field Validate event. this.value could be altered for custom needs

    this._trigger('validate');

    return this.whenValid({force, value: this.value, _refreshed: true})
      .always(() => { this._reflowUI(); })
      .done(() =>   { this._trigger('success'); })
      .fail(() =>   { this._trigger('error'); })
      .always(() => { this._trigger('validated'); })
      .pipe(...this._pipeAccordingToValidationResult());
  },

  hasConstraints: function () {
    return 0 !== this.constraints.length;
  },

An empty optional field does not need validation

  needsValidation: function (value) {
    if ('undefined' === typeof value)
      value = this.getValue();

If a field is empty and not required, it is valid Except if data-parsley-validate-if-empty explicitely added, useful for some custom validators

    if (!value.length && !this._isRequired() && 'undefined' === typeof this.options.validateIfEmpty)
      return false;

    return true;
  },

  _isInGroup: function (group) {
    if (Array.isArray(this.options.group))
      return -1 !== $.inArray(group, this.options.group);
    return this.options.group === group;
  },

Just validate field. Do not trigger any event. Returns true iff all constraints pass, false if there are failures, or null if the result can not be determined yet (depends on a promise) See also whenValid.

  isValid: function (options) {
    if (arguments.length >= 1 && !$.isPlainObject(options)) {
      Utils.warnOnce('Calling isValid on a parsley field without passing arguments as an object is deprecated.');
      var [force, value] = arguments;
      options = {force, value};
    }
    var promise = this.whenValid(options);
    if (!promise) // Excluded via `group`
      return true;
    return statusMapping[promise.state()];
  },

¶

Just validate field. Do not trigger any event. @returns a promise that succeeds only when all validations do or undefined if the field is not in the given group. The argument force will force validation of empty fields. If a value is given, it will be validated instead of the value of the input.
```
  whenValid: function ({force = false, value, group, _refreshed} = {}) {
```

Recompute options and rebind constraints to have latest changes

    if (!_refreshed)
      this.refreshConstraints();

do not validate a field if not the same as given validation group

    if (group && !this._isInGroup(group))
      return;

    this.validationResult = true;

A field without constraint is valid

    if (!this.hasConstraints())
      return $.when();

Value could be passed as argument, needed to add more power to ‘field:validate’

    if ('undefined' === typeof value || null === value)
      value = this.getValue();

    if (!this.needsValidation(value) && true !== force)
      return $.when();

    var groupedConstraints = this._getGroupedConstraints();
    var promises = [];
    $.each(groupedConstraints, (_, constraints) => {

Process one group of constraints at a time, we validate the constraints and combine the promises together.

      var promise = Utils.all(
        $.map(constraints, constraint => this._validateConstraint(value, constraint))
      );
      promises.push(promise);
      if (promise.state() === 'rejected')
        return false; // Interrupt processing if a group has already failed
    });
    return Utils.all(promises);
  },

@returns a promise

  _validateConstraint: function(value, constraint) {
    var result = constraint.validate(value, this);

Map false to a failed promise

    if (false === result)
      result = $.Deferred().reject();

Make sure we return a promise and that we record failures

    return Utils.all([result]).fail(errorMessage => {
      if (!(this.validationResult instanceof Array))
        this.validationResult = [];
      this.validationResult.push({
        assert: constraint,
        errorMessage: 'string' === typeof errorMessage && errorMessage
      });
    });
  },

¶

@returns Parsley field computed value that could be overrided or configured in DOM
```
  getValue: function () {
    var value;
```

Value could be overriden in DOM or with explicit options

    if ('function' === typeof this.options.value)
      value = this.options.value(this);
    else if ('undefined' !== typeof this.options.value)
      value = this.options.value;
    else
      value = this.$element.val();

Handle wrong DOM or configurations

    if ('undefined' === typeof value || null === value)
      return '';

    return this._handleWhitespace(value);
  },

Reset UI

  reset: function () {
    this._resetUI();
    return this._trigger('reset');
  },

¶

Destroy Parsley instance (+ UI)
```
  destroy: function () {
```

Field case: emit destroy event to clean UI and then destroy stored instance

    this._destroyUI();
    this.$element.removeData('Parsley');
    this.$element.removeData('FieldMultiple');
    this._trigger('destroy');
  },

Actualize options that could have change since previous validation Re-bind accordingly constraints (could be some new, removed or updated)

  refreshConstraints: function () {
    return this.actualizeOptions()._bindConstraints();
  },

  /**
  * Add a new constraint to a field
  *
  * @param {String}   name
  * @param {Mixed}    requirements      optional
  * @param {Number}   priority          optional
  * @param {Boolean}  isDomConstraint   optional
  */
  addConstraint: function (name, requirements, priority, isDomConstraint) {

    if (window.Parsley._validatorRegistry.validators[name]) {
      var constraint = new Constraint(this, name, requirements, priority, isDomConstraint);

if constraint already exist, delete it and push new version

      if ('undefined' !== this.constraintsByName[constraint.name])
        this.removeConstraint(constraint.name);

      this.constraints.push(constraint);
      this.constraintsByName[constraint.name] = constraint;
    }

    return this;
  },

Remove a constraint

  removeConstraint: function (name) {
    for (var i = 0; i < this.constraints.length; i++)
      if (name === this.constraints[i].name) {
        this.constraints.splice(i, 1);
        break;
      }
    delete this.constraintsByName[name];
    return this;
  },

Update a constraint (Remove + re-add)

  updateConstraint: function (name, parameters, priority) {
    return this.removeConstraint(name)
      .addConstraint(name, parameters, priority);
  },

¶

Internals

Internal only. Bind constraints from config + options + DOM

  _bindConstraints: function () {
    var constraints = [];
    var constraintsByName = {};

clean all existing DOM constraints to only keep javascript user constraints

    for (var i = 0; i < this.constraints.length; i++)
      if (false === this.constraints[i].isDomConstraint) {
        constraints.push(this.constraints[i]);
        constraintsByName[this.constraints[i].name] = this.constraints[i];
      }

    this.constraints = constraints;
    this.constraintsByName = constraintsByName;

then re-add Parsley DOM-API constraints

    for (var name in this.options)
      this.addConstraint(name, this.options[name], undefined, true);

finally, bind special HTML5 constraints

    return this._bindHtml5Constraints();
  },

¶

Internal only. Bind specific HTML5 constraints to be HTML5 compliant
```
  _bindHtml5Constraints: function () {
```

html5 required

    if (null !== this.element.getAttribute('required'))
      this.addConstraint('required', true, undefined, true);

html5 pattern

    if (null !== this.element.getAttribute('pattern'))
      this.addConstraint('pattern', this.element.getAttribute('pattern'), undefined, true);

range

    let min = this.element.getAttribute('min');
    let max = this.element.getAttribute('max');
    if (null !== min && null !== max)
      this.addConstraint('range', [min, max], undefined, true);

HTML5 min

    else if (null !== min)
      this.addConstraint('min', min, undefined, true);

HTML5 max

    else if (null !== max)
      this.addConstraint('max', max, undefined, true);

length

    if (null !== this.element.getAttribute('minlength') && null !== this.element.getAttribute('maxlength'))
      this.addConstraint('length', [this.element.getAttribute('minlength'), this.element.getAttribute('maxlength')], undefined, true);

HTML5 minlength

    else if (null !== this.element.getAttribute('minlength'))
      this.addConstraint('minlength', this.element.getAttribute('minlength'), undefined, true);

HTML5 maxlength

    else if (null !== this.element.getAttribute('maxlength'))
      this.addConstraint('maxlength', this.element.getAttribute('maxlength'), undefined, true);

¶

html5 types
```
    var type = this.element.type;
```

Small special case here for HTML5 number: integer validator if step attribute is undefined or an integer value, number otherwise

    if ('number' === type) {
      return this.addConstraint('type', ['number', {
        step: this.element.getAttribute('step') || '1',
        base: min || this.element.getAttribute('value')
      }], undefined, true);

Regular other HTML5 supported types

    } else if (/^(email|url|range|date)$/i.test(type)) {
      return this.addConstraint('type', type, undefined, true);
    }
    return this;
  },

Internal only. Field is required if have required constraint without false value

  _isRequired: function () {
    if ('undefined' === typeof this.constraintsByName.required)
      return false;

    return false !== this.constraintsByName.required.requirements;
  },

Internal only. Shortcut to trigger an event

  _trigger: function (eventName) {
    return this.trigger('field:' + eventName);
  },

Internal only Handles whitespace in a value Use data-parsley-whitespace="squish" to auto squish input value Use data-parsley-whitespace="trim" to auto trim input value

  _handleWhitespace: function (value) {
    if (true === this.options.trimValue)
      Utils.warnOnce('data-parsley-trim-value="true" is deprecated, please use data-parsley-whitespace="trim"');

    if ('squish' === this.options.whitespace)
      value = value.replace(/\s{2,}/g, ' ');

    if (('trim' === this.options.whitespace) || ('squish' === this.options.whitespace) || (true === this.options.trimValue))
      value = Utils.trimString(value);

    return value;
  },

  _isDateInput: function() {
    var c = this.constraintsByName.type;
    return c && c.requirements === 'date';
  },

Internal only. Returns the constraints, grouped by descending priority. The result is thus an array of arrays of constraints.

  _getGroupedConstraints: function () {
    if (false === this.options.priorityEnabled)
      return [this.constraints];

    var groupedConstraints = [];
    var index = {};

Create array unique of priorities

    for (var i = 0; i < this.constraints.length; i++) {
      var p = this.constraints[i].priority;
      if (!index[p])
        groupedConstraints.push(index[p] = []);
      index[p].push(this.constraints[i]);
    }

Sort them by priority DESC

    groupedConstraints.sort(function (a, b) { return b[0].priority - a[0].priority; });

    return groupedConstraints;
  }

};

export default Field;

field.js

Public API

Internals