parsley.js

/*
 * Parsley.js allows you to verify your form inputs frontend side, without writing a line of javascript. Or so..
 *
 * Author: Guillaume Potier - @guillaumepotier
*/

!function ($) {

  'use strict';

  /**
  * Validator class stores all constraints functions and associated messages.
  * Provides public interface to add, remove or modify them
  *
  * @class Validator
  * @constructor
  */
  var Validator = function ( options ) {
    /**
    * Error messages
    * 
    * @property messages
    * @type {Object}
    */
    this.messages = {
        defaultMessage: "This value seems to be invalid."
      , type: {
            email:      "This value should be a valid email."
          , url:        "This value should be a valid url."
          , urlstrict:  "This value should be a valid url."
          , number:     "This value should be a valid number."
          , digits:     "This value should be digits."
          , dateIso:    "This value should be a valid date (YYYY-MM-DD)."
          , alphanum:   "This value should be alphanumeric."
        }
      , notnull:        "This value should not be null."
      , notblank:       "This value should not be blank."
      , required:       "This value is required."
      , regexp:         "This value seems to be invalid."
      , min:            "This value should be greater than %s."
      , max:            "This value should be lower than %s."
      , range:          "This value should be between %s and %s."
      , minlength:      "This value is too short. It should have %s characters or more."
      , maxlength:      "This value is too long. It should have %s characters or less."
      , rangelength:    "This value length is invalid. It should be between %s and %s characters long."
      , mincheck:       "You must select at least %s choices."
      , maxcheck:       "You must select %s choices or less."
      , rangecheck:     "You must select between %s and %s choices."
      , equalto:        "This value should be the same."
    },

    this.init( options );
  };

  Validator.prototype = {

    constructor: Validator

    /**
    * Validator list. Built-in validators functions
    * 
    * @property validators
    * @type {Object}
    */
    , validators: {
      notnull: function ( val ) {
        return val.length > 0;
      }

      , notblank: function ( val ) {
        return null !== val && '' !== val.replace( /^\s+/g, '' ).replace( /\s+$/g, '' );
      }

      // Works on all inputs. val is object for checkboxes
      , required: function ( val ) {

        // for checkboxes and select multiples. Check there is at least one required value
        if ( 'object' === typeof val ) {
          for ( var i in val ) {
            if ( this.required( val[ i ] ) ) {
              return true;
            }
          }

          return false;
        }

        return this.notnull( val ) && this.notblank( val );
      }

      , type: function ( val, type ) {
        var regExp;

        switch ( type ) {
          case 'number':
            regExp = /^-?(?:\d+|\d{1,3}(?:,\d{3})+)?(?:\.\d+)?$/;
            break;
          case 'digits':
            regExp = /^\d+$/;
            break;
          case 'alphanum':
            regExp = /^\w+$/;
            break;
          case 'email':
            regExp = /^((([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+(\.([a-z]|\d|[!#\$%&'\*\+\-\/=\?\^_`{\|}~]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])+)*)|((\x22)((((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(([\x01-\x08\x0b\x0c\x0e-\x1f\x7f]|\x21|[\x23-\x5b]|[\x5d-\x7e]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(\\([\x01-\x09\x0b\x0c\x0d-\x7f]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]))))*(((\x20|\x09)*(\x0d\x0a))?(\x20|\x09)+)?(\x22)))@((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))$/i;
            break;
          case 'url':
            val = new RegExp( '(https?|s?ftp|git)', 'i' ).test( val ) ? val : 'http://' + val;
            /* falls through */
          case 'urlstrict':
            regExp = /^(https?|s?ftp|git):\/\/(((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:)*@)?(((\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5])\.(\d|[1-9]\d|1\d\d|2[0-4]\d|25[0-5]))|((([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|\d|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.)+(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])*([a-z]|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])))\.?)(:\d*)?)(\/((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)+(\/(([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)*)*)?)?(\?((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|[\uE000-\uF8FF]|\/|\?)*)?(#((([a-z]|\d|-|\.|_|~|[\u00A0-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF])|(%[\da-f]{2})|[!\$&'\(\)\*\+,;=]|:|@)|\/|\?)*)?$/i;
            break;
          case 'dateIso':
            regExp = /^(\d{4})\D?(0[1-9]|1[0-2])\D?([12]\d|0[1-9]|3[01])$/;
            break;
          default:
            return false;
        }

        // test regExp if not null
        return '' !== val ? regExp.test( val ) : false;
      }

      , regexp: function ( val, regExp, self ) {
        return new RegExp( regExp, self.options.regexpFlag || '' ).test( val );
      }

      , minlength: function ( val, min ) {
        return val.length >= min;
      }

      , maxlength: function ( val, max ) {
        return val.length <= max;
      }

      , rangelength: function ( val, arrayRange ) {
        return this.minlength( val, arrayRange[ 0 ] ) && this.maxlength( val, arrayRange[ 1 ] );
      }

      , min: function ( val, min ) {
        return Number( val ) >= min;
      }

      , max: function ( val, max ) {
        return Number( val ) <= max;
      }

      , range: function ( val, arrayRange ) {
        return val >= arrayRange[ 0 ] && val <= arrayRange[ 1 ];
      }

      , equalto: function ( val, elem, self ) {
        self.options.validateIfUnchanged = true;

        return val === $( elem ).val();
      }

      , remote: function ( val, url, self ) {
        var result = null
          , data = {}
          , dataType = {};

        data[ self.$element.attr( 'name' ) ] = val;

        if ( 'undefined' !== typeof self.options.remoteDatatype ) {
          dataType = { dataType: self.options.remoteDatatype };
        }

        var manage = function ( isConstraintValid, message ) {
          // remove error message because ajax response message could change depending on the sent value !
          self.removeError( 'remote' );

          self.updtConstraint( { name: 'remote', isValid: isConstraintValid }, message );
          self.manageValidationResult();
        };

        // transform string response into object
        var handleResponse = function ( response ) {
          if ( 'object' === typeof response ) {
            return response;
          }

          try {
            response = $.parseJSON( response );
          } catch ( err ) {}

          return response;
        }

        var manageErrorMessage = function ( response ) {
          return 'object' === typeof response && null !== response ? ( 'undefined' !== typeof response.error ? response.error : ( 'undefined' !== typeof response.message ? response.message : null ) ) : null;
        }

        $.ajax( $.extend( {}, {
            url: url
          , data: data
          , async: self.async
          , type: self.options.remoteMethod || 'GET'
          , success: function ( response ) {
            response = handleResponse( response );
            manage( 1 === response || true === response || ( 'object' === typeof response && null !== response && 'undefined' !== typeof response.success ), manageErrorMessage( response )
            );
          }
          , error: function ( response ) {
            response = handleResponse( response );
            manage( false, manageErrorMessage( response ) );
          }
        }, dataType ) );

        if ( self.async ) {
          manage( result );
        }

        return result;
      }

      /**
      * Aliases for checkboxes constraints
      */
      , mincheck: function ( obj, val ) {
        return this.minlength( obj, val );
      }

      , maxcheck: function ( obj, val ) {
        return this.maxlength( obj, val);
      }

      , rangecheck: function ( obj, arrayRange ) {
        return this.rangelength( obj, arrayRange );
      }
    }

    /*
    * Register custom validators and messages
    */
    , init: function ( options ) {
      var customValidators = options.validators
        , customMessages = options.messages;

      var key;
      for ( key in customValidators ) {
        this.addValidator(key, customValidators[ key ]);
      }

      for ( key in customMessages ) {
        this.addMessage(key, customMessages[ key ]);
      }
    }

    /**
    * Replace %s placeholders by values
    *
    * @method formatMesssage
    * @param {String} message Message key
    * @param {Mixed} args Args passed by validators functions. Could be string, number or object
    * @return {String} Formatted string
    */
    , formatMesssage: function ( message, args ) {

      if ( 'object' === typeof args ) {
        for ( var i in args ) {
          message = this.formatMesssage( message, args[ i ] );
        }

        return message;
      }

      return 'string' === typeof message ? message.replace( new RegExp( '%s', 'i' ), args ) : '';
    }

    /**
    * Add / override a validator in validators list
    *
    * @method addValidator
    * @param {String} name Validator name. Will automatically bindable through data-name=''
    * @param {Function} fn Validator function. Must return {Boolean}
    */
    , addValidator: function ( name, fn ) {
      this.validators[ name ] = fn;
    }

    /**
    * Add / override error message
    *
    * @method addMessage
    * @param {String} name Message name. Will automatically be binded to validator with same name
    * @param {String} message Message
    */
    , addMessage: function ( key, message, type ) {

      if ( 'undefined' !== typeof type && true === type ) {
        this.messages.type[ key ] = message;
        return;
      }

      // custom types messages are a bit tricky cuz' nested ;)
      if ( 'type' === key ) {
        for ( var i in message ) {
          this.messages.type[ i ] = message[ i ];
        }

        return;
      }

      this.messages[ key ] = message;
    }
  };

  /**
  * ParsleyField class manage each form field inside a validated Parsley form.
  * Returns if field valid or not depending on its value and constraints
  * Manage field error display and behavior, event triggers and more
  *
  * @class ParsleyField
  * @constructor
  */
  var ParsleyField = function ( element, options, type ) {
    this.options = options;
    this.Validator = new Validator( options );

    // if type is ParsleyFieldMultiple, just return this. used for clone
    if ( type === 'ParsleyFieldMultiple' ) {
      return this;
    }

    this.init( element, type || 'ParsleyField' );
  };

  ParsleyField.prototype = {

    constructor: ParsleyField

    /**
    * Set some properties, bind constraint validators and validation events
    *
    * @method init
    * @param {Object} element
    * @param {Object} options
    */
    , init: function ( element, type ) {
      this.type = type;
      this.isValid = true;
      this.element = element;
      this.validatedOnce = false;
      this.$element = $( element );
      this.val = this.$element.val();
      this.isRequired = false;
      this.constraints = [];

      // overriden by ParsleyItemMultiple if radio or checkbox input
      if ( 'undefined' === typeof this.isRadioOrCheckbox ) {
        this.isRadioOrCheckbox = false;
        this.hash = this.generateHash();
        this.errorClassHandler = this.options.errors.classHandler( element, this.isRadioOrCheckbox ) || this.$element;
      }

      // error ul dom management done only once at init
      this.ulErrorManagement();

      // bind some html5 properties
      this.bindHtml5Constraints();

      // bind validators to field
      this.addConstraints();

      // bind parsley events if validators have been registered
      if ( this.constraints.length ) {
        this.bindValidationEvents();
      }
    }

    , setParent: function ( elem ) {
      this.$parent = $( elem );
    }

    , getParent: function () {
      return this.$parent;
    }

    /**
    * Bind some extra html5 types / validators
    *
    * @private
    * @method bindHtml5Constraints
    */
    , bindHtml5Constraints: function () {
      // add html5 required support + class required support
      if ( this.$element.hasClass( 'required' ) || this.$element.attr( 'required' ) ) {
        this.options.required = true;
      }

      // add html5 supported types & options
      if ( 'undefined' !== typeof this.$element.attr( 'type' ) && new RegExp( this.$element.attr( 'type' ), 'i' ).test( 'email url number range' ) ) {
        this.options.type = this.$element.attr( 'type' );

        // number and range types could have min and/or max values
        if ( new RegExp( this.options.type, 'i' ).test( 'number range' ) ) {
          this.options.type = 'number';

          // double condition to support jQuery and Zepto.. :(
          if ( 'undefined' !== typeof this.$element.attr( 'min' ) && this.$element.attr( 'min' ).length ) {
            this.options.min = this.$element.attr( 'min' );
          }

          if ( 'undefined' !== typeof this.$element.attr( 'max' ) && this.$element.attr( 'max' ).length ) {
            this.options.max = this.$element.attr( 'max' );
          }
        }
      }

      if ( 'string' === typeof this.$element.attr( 'pattern' ) && this.$element.attr( 'pattern' ).length ) {
          this.options.regexp = this.$element.attr( 'pattern' );
      }

    }

    /**
    * Attach field validators functions passed through data-api
    *
    * @private
    * @method addConstraints
    */
    , addConstraints: function () {
      for ( var constraint in this.options ) {
        var addConstraint = {};
        addConstraint[ constraint ] = this.options[ constraint ];
        this.addConstraint( addConstraint, true );
      }
    }

    /**
    * Dynamically add a new constraint to a field
    *
    * @method addConstraint
    * @param {Object} constraint { name: requirements }
    */
    , addConstraint: function ( constraint, doNotUpdateValidationEvents ) {
        for ( var name in constraint ) {
          name = name.toLowerCase();

          if ( 'function' === typeof this.Validator.validators[ name ] ) {
            this.constraints.push( {
                name: name
              , requirements: constraint[ name ]
              , isValid: null
            } );

            if ( name === 'required' ) {
              this.isRequired = true;
            }

            this.addCustomConstraintMessage( name );
          }
        }

        // force field validation next check and reset validation events
        if ( 'undefined' === typeof doNotUpdateValidationEvents ) {
          this.bindValidationEvents();
        }
    }

    /**
    * Dynamically update an existing constraint to a field.
    * Simple API: { name: requirements }
    *
    * @method updtConstraint
    * @param {Object} constraint
    */
    , updateConstraint: function ( constraint, message ) {
      for ( var name in constraint ) {
        this.updtConstraint( { name: name, requirements: constraint[ name ], isValid: null }, message );
      }
    }

    /**
    * Dynamically update an existing constraint to a field.
    * Complex API: { name: name, requirements: requirements, isValid: boolean }
    *
    * @method updtConstraint
    * @param {Object} constraint
    */
    , updtConstraint: function ( constraint, message ) {
      for ( var i in this.constraints ) {
        if ( this.constraints[ i ].name === constraint.name ) {
          this.constraints[ i ] = $.extend( true, this.constraints[ i ], constraint );
          if ( 'string' === typeof message ) {
            this.Validator.messages[ this.constraints[ i ].name ] = message ;
          }
        }
      }

      // force field validation next check and reset validation events
      this.bindValidationEvents();
    }

    /**
    * Dynamically remove an existing constraint to a field.
    *
    * @method removeConstraint
    * @param {String} constraintName
    */
    , removeConstraint: function ( constraintName ) {
      var constraintName = constraintName.toLowerCase()
        , updatedConstraints = [];

      for ( var constraint in this.constraints ) {
        if ( this.constraints[ constraint ].name !== constraintName ) {
          updatedConstraints.push( this.constraints[ constraint ] );
        }
      }

      if ( constraintName === 'required' ) {
        this.isRequired = false;
      }

      this.constraints = updatedConstraints;

      // if there are no more constraint, destroy parsley instance for this field
      if ( updatedConstraints.length === 0 ) {
        // in a form context, remove item from parent
        if ( 'ParsleyForm' === typeof this.getParent() ) {
          this.getParent().removeItem( this.$element );
          return;
        }

        this.destroy();
        return;
      }

      this.bindValidationEvents();
    }

    /**
    * Add custom constraint message, passed through data-API
    *
    * @private
    * @method addCustomConstraintMessage
    * @param constraint
    */
    , addCustomConstraintMessage: function ( constraint ) {
      // custom message type data-type-email-message -> typeEmailMessage | data-minlength-error => minlengthMessage
      var customMessage = constraint
        + ( 'type' === constraint && 'undefined' !== typeof this.options[ constraint ] ? this.options[ constraint ].charAt( 0 ).toUpperCase() + this.options[ constraint ].substr( 1 ) : '' )
        + 'Message';

      if ( 'undefined' !== typeof this.options[ customMessage ] ) {
        this.Validator.addMessage( 'type' === constraint ? this.options[ constraint ] : constraint, this.options[ customMessage ], 'type' === constraint );
      }
    }

    /**
    * Bind validation events on a field
    *
    * @private
    * @method bindValidationEvents
    */
    , bindValidationEvents: function () {
      // this field has validation events, that means it has to be validated
      this.isValid = null;
      this.$element.addClass( 'parsley-validated' );

      // remove eventually already binded events
      this.$element.off( '.' + this.type );

      // force add 'change' event if async remote validator here to have result before form submitting
      if ( this.options.remote && !new RegExp( 'change', 'i' ).test( this.options.trigger ) ) {
        this.options.trigger = !this.options.trigger ? 'change' : ' change';
      }

      // alaways bind keyup event, for better UX when a field is invalid
      var triggers = ( !this.options.trigger ? '' : this.options.trigger )
        + ( new RegExp( 'key', 'i' ).test( this.options.trigger ) ? '' : ' keyup' );

      // alaways bind change event, for better UX when a select is invalid
      if ( this.$element.is( 'select' ) ) {
        triggers += new RegExp( 'change', 'i' ).test( triggers ) ? '' : ' change';
      }

      // trim triggers to bind them correctly with .on()
      triggers = triggers.replace( /^\s+/g , '' ).replace( /\s+$/g , '' );

      this.$element.on( ( triggers + ' ' ).split( ' ' ).join( '.' + this.type + ' ' ), false, $.proxy( this.eventValidation, this ) );
    }

    /**
    * Hash management. Used for ul error
    *
    * @method generateHash
    * @returns {String} 5 letters unique hash
    */
    , generateHash: function () {
      return 'parsley-' + ( Math.random() + '' ).substring( 2 );
    }

    /**
    * Public getHash accessor
    *
    * @method getHash
    * @returns {String} hash
    */
    , getHash: function () {
      return this.hash;
    }

    /**
    * Returns field val needed for validation
    * Special treatment for radio & checkboxes
    *
    * @method getVal
    * @returns {String} val
    */
    , getVal: function () {
      return this.$element.val();
    }

    /**
    * Called when validation is triggered by an event
    * Do nothing if val.length < this.options.validationMinlength
    *
    * @method eventValidation
    * @param {Object} event jQuery event
    */
    , eventValidation: function ( event ) {
      var val = this.getVal();

      // do nothing on keypress event if not explicitely passed as data-trigger and if field has not already been validated once
      if ( event.type === 'keyup' && !/keyup/i.test( this.options.trigger ) && !this.validatedOnce ) {
        return true;
      }

      // do nothing on change event if not explicitely passed as data-trigger and if field has not already been validated once
      if ( event.type === 'change' && !/change/i.test( this.options.trigger ) && !this.validatedOnce ) {
        return true;
      }

      // start validation process only if field has enough chars and validation never started
      if ( !this.isRadioOrCheckbox && val.length < this.options.validationMinlength && !this.validatedOnce ) {
        return true;
      }

      this.validate( true, false );
    }

    /**
    * Return if field verify its constraints
    *
    * @method isValid
    * @return {Boolean} Is field valid or not
    */
    , isFieldValid: function () {
      return this.validate( false, false );
    }

    /**
    * Validate a field & display errors
    *
    * @method validate
    * @param {Boolean} errorBubbling set to false if you just want isValid boolean without error bubbling next to fields
    * @param {Boolean} async if false, wait ajax calls returns
    * @return {Boolean} Is field valid or not
    */
    , validate: function ( errorBubbling, async ) {
      var val = this.getVal()
        , isValid = null;

      // do not even bother trying validating a field w/o constraints
      if ( this.constraints.length === 0 ) {
        return null;
      }

      // reset Parsley validation if onFieldValidate returns true, or if field is empty and not required
      if ( this.options.listeners.onFieldValidate( this.element, this ) || ( '' === val && !this.isRequired ) ) {
        this.reset();
        return null;
      }

      // do not validate a field already validated and unchanged !
      if ( !this.needsValidation( val ) ) {
        return this.isValid;
      }

      this.errorBubbling = 'undefined' !== typeof errorBubbling ? errorBubbling : true;
      this.async = 'undefined' !== typeof async ? async : true;

      isValid = this.applyValidators();

      if ( this.errorBubbling ) {
        this.manageValidationResult();
      }

      return isValid;
    }

    /**
    * Check if value has changed since previous validation
    *
    * @method needsValidation
    * @param value
    * @return {Boolean}
    */
    , needsValidation: function ( val ) {
      if ( !this.options.validateIfUnchanged && this.isValid !== null && this.val === val && this.validatedOnce ) {
        return false;
      }

      this.val = val;
      return this.validatedOnce = true;
    }

    /**
    * Loop through every fields validators
    * Adds errors after unvalid fields
    *
    * @method applyValidators
    * @return {Mixed} {Boolean} If field valid or not, null if not validated
    */
    , applyValidators: function () {
      var isValid = null;

      for ( var constraint = 0; constraint < this.constraints.length; constraint++ ) {
        var result = this.Validator.validators[ this.constraints[ constraint ].name ]( this.val, this.constraints[ constraint ].requirements, this );

        if ( false === result ) {
          isValid = false;
          this.constraints[ constraint ].isValid = isValid;
        } else if ( true === result ) {
          this.constraints[ constraint ].isValid = true;
          isValid = false !== isValid;
        }
      }

      return isValid;
    }

    /**
    * Fired when all validators have be executed
    * Returns true or false if field is valid or not
    * Display errors messages below faild fields
    * Adds parsley-success or parsley-error class on fields
    *
    * @method manageValidationResult
    * @return {Boolean} Is field valid or not
    */
    , manageValidationResult: function () {
      var isValid = null;

      for ( var constraint = 0; constraint < this.constraints.length; constraint++ ) {
        if ( false === this.constraints[ constraint ].isValid ) {
          this.manageError( this.constraints[ constraint ] );
          isValid = false;
        } else if ( true === this.constraints[ constraint ].isValid ) {
          this.removeError( this.constraints[ constraint ].name );
          isValid = false !== isValid;
        }
      }

      this.isValid = isValid;

      if ( true === this.isValid ) {
        this.removeErrors();
        this.errorClassHandler.removeClass( this.options.errorClass ).addClass( this.options.successClass );
        this.options.listeners.onFieldSuccess( this.element, this.constraints, this );
        return true;
      } else if ( false === this.isValid ) {
        this.errorClassHandler.removeClass( this.options.successClass ).addClass( this.options.errorClass );
        this.options.listeners.onFieldError( this.element, this.constraints, this );
        return false;
      }

      return isValid;
    }

    /**
    * Manage ul error Container
    *
    * @private
    * @method ulErrorManagement
    */
    , ulErrorManagement: function () {
      this.ulError = '#' + this.hash;
      this.ulTemplate = $( this.options.errors.errorsWrapper ).attr( 'id', this.hash ).addClass( 'parsley-error-list' );
    }

    /**
    * Remove li / ul error
    *
    * @method removeError
    * @param {String} constraintName Method Name
    */
    , removeError: function ( constraintName ) {
      var liError = this.ulError + ' .' + constraintName;

      this.options.animate ? $( liError ).fadeOut( this.options.animateDuration, function () { $( this ).remove() } ) : $( liError ).remove();

      // remove li error, and ul error if no more li inside
      if ( this.ulError && $( this.ulError ).children().length === 0 ) {
        this.removeErrors();
      }
    }

    /**
    * Add li error
    *
    * @method addError
    * @param {Object} { minlength: "error message for minlength constraint" }
    */
    , addError: function ( error ) {
      for ( var constraint in error ) {
        var liTemplate = $( this.options.errors.errorElem ).addClass( constraint );

        $( this.ulError ).append( this.options.animate ? $( liTemplate ).text( error[ constraint ] ).hide().fadeIn( this.options.animateDuration ) : $( liTemplate ).text( error[ constraint ] ) );
      }
    }

    /**
    * Remove all ul / li errors
    *
    * @method removeErrors
    */
    , removeErrors: function () {
      this.options.animate ? $( this.ulError ).fadeOut( this.options.animateDuration, function () { $( this ).remove(); } ) : $( this.ulError ).remove();
    }

    /**
    * Remove ul errors and parsley error or success classes
    *
    * @method reset
    */
    , reset: function () {
      this.isValid = null;
      this.removeErrors();
      this.validatedOnce = false;
      this.errorClassHandler.removeClass( this.options.successClass ).removeClass( this.options.errorClass );

      return this;
    }

    /**
    * Add li / ul errors messages
    *
    * @method manageError
    * @param {Object} constraint
    */
    , manageError: function ( constraint ) {
      // display ulError container if it has been removed previously (or never shown)
      if ( !$( this.ulError ).length ) {
        this.manageErrorContainer();
      }

      // TODO: refacto properly
      // if required constraint but field is not null, do not display
      if ( 'required' === constraint.name && null !== this.getVal() && this.getVal().length > 0 ) {
        return;
      // if empty required field and non required constraint fails, do not display
      } else if ( this.isRequired && 'required' !== constraint.name && ( null === this.getVal() || 0 === this.getVal().length ) ) {
        return;
      }

      // TODO: refacto error name w/ proper & readable function
      var constraintName = constraint.name
        , liClass = false !== this.options.errorMessage ? 'custom-error-message' : constraintName
        , liError = {}
        , message = false !== this.options.errorMessage ? this.options.errorMessage : ( constraint.name === 'type' ?
            this.Validator.messages[ constraintName ][ constraint.requirements ] : ( 'undefined' === typeof this.Validator.messages[ constraintName ] ?
              this.Validator.messages.defaultMessage : this.Validator.formatMesssage( this.Validator.messages[ constraintName ], constraint.requirements ) ) );

      // add liError if not shown. Do not add more than once custom errorMessage if exist
      if ( !$( this.ulError + ' .' + liClass ).length ) {
        liError[ liClass ] = message;
        this.addError( liError );
      }
    }

    /**
    * Create ul error container
    *
    * @method manageErrorContainer
    */
    , manageErrorContainer: function () {
      var errorContainer = this.options.errorContainer || this.options.errors.container( this.element, this.isRadioOrCheckbox )
        , ulTemplate = this.options.animate ? this.ulTemplate.show() : this.ulTemplate;

      if ( 'undefined' !== typeof errorContainer ) {
        $( errorContainer ).append( ulTemplate );
        return;
      }

      !this.isRadioOrCheckbox ? this.$element.after( ulTemplate ) : this.$element.parent().after( ulTemplate );
    }

    /**
    * Add custom listeners
    *
    * @param {Object} { listener: function () {} }, eg { onFormSubmit: function ( isValid, event, focus ) { ... } }
    */
    , addListener: function ( object ) {
      for ( var listener in object ) {
        this.options.listeners[ listener ] = object[ listener ];
      }
    }

    /**
    * Destroy parsley field instance
    *
    * @private
    * @method destroy
    */
    , destroy: function () {
      this.$element.removeClass( 'parsley-validated' );
      this.reset().$element.off( '.' + this.type ).removeData( this.type );
    }
  };

  /**
  * ParsleyFieldMultiple override ParsleyField for checkbox and radio inputs
  * Pseudo-heritance to manage divergent behavior from ParsleyItem in dedicated methods
  *
  * @class ParsleyFieldMultiple
  * @constructor
  */
  var ParsleyFieldMultiple = function ( element, options, type ) {
    this.initMultiple( element, options );
    this.inherit( element, options );
    this.Validator = new Validator( options );

    // call ParsleyField constructor
    this.init( element, type || 'ParsleyFieldMultiple' );
  };

  ParsleyFieldMultiple.prototype = {

    constructor: ParsleyFieldMultiple

    /**
    * Set some specific properties, call some extra methods to manage radio / checkbox
    *
    * @method init
    * @param {Object} element
    * @param {Object} options
    */
    , initMultiple: function ( element, options ) {
      this.element = element;
      this.$element = $( element );
      this.group = options.group || false;
      this.hash = this.getName();
      this.siblings = this.group ? '[data-group="' + this.group + '"]' : 'input[name="' + this.$element.attr( 'name' ) + '"]';
      this.isRadioOrCheckbox = true;
      this.isRadio = this.$element.is( 'input[type=radio]' );
      this.isCheckbox = this.$element.is( 'input[type=checkbox]' );
      this.errorClassHandler = options.errors.classHandler( element, this.isRadioOrCheckbox ) || this.$element.parent();
    }

    /**
    * Set specific constraints messages, do pseudo-heritance
    *
    * @private
    * @method inherit
    * @param {Object} element
    * @param {Object} options
    */
    , inherit: function ( element, options ) {
      var clone = new ParsleyField( element, options, 'ParsleyFieldMultiple' );

      for ( var property in clone ) {
        if ( 'undefined' === typeof this[ property ] ) {
          this[ property ] = clone [ property ];
        }
      }
    }

    /**
    * Set specific constraints messages, do pseudo-heritance
    *
    * @method getName
    * @returns {String} radio / checkbox hash is cleaned 'name' or data-group property
    */
   , getName: function () {
     if ( this.group ) {
       return 'parsley-' + this.group;
     }

     if ( 'undefined' === typeof this.$element.attr( 'name' ) ) {
       throw "A radio / checkbox input must have a data-group attribute or a name to be Parsley validated !";
     }

     return 'parsley-' + this.$element.attr( 'name' ).replace( /(:|\.|\[|\])/g, '' );
   }

   /**
   * Special treatment for radio & checkboxes
   * Returns checked radio or checkboxes values
   *
   * @method getVal
   * @returns {String} val
   */
   , getVal: function () {
      if ( this.isRadio ) {
        return $( this.siblings + ':checked' ).val() || '';
      }

      if ( this.isCheckbox ) {
        var values = [];

        $( this.siblings + ':checked' ).each( function () {
          values.push( $( this ).val() );
        } );

        return values;
      }
   }

   /**
   * Bind validation events on a field
   *
   * @private
   * @method bindValidationEvents
   */
   , bindValidationEvents: function () {
     // this field has validation events, that means it has to be validated
     this.isValid = null;
     this.$element.addClass( 'parsley-validated' );

     // remove eventually already binded events
     this.$element.off( '.' + this.type );

      // alaways bind keyup event, for better UX when a field is invalid
      var self = this
        , triggers = ( !this.options.trigger ? '' : this.options.trigger )
        + ( new RegExp( 'change', 'i' ).test( this.options.trigger ) ? '' : ' change' );

      // trim triggers to bind them correctly with .on()
      triggers = triggers.replace( /^\s+/g , '' ).replace( /\s+$/g ,'' );

     // bind trigger event on every siblings
     $( this.siblings ).each(function () {
       $( this ).on( triggers.split( ' ' ).join( '.' + self.type + ' ' ) , false, $.proxy( self.eventValidation, self ) );
     } )
   }
  };

  /**
  * ParsleyForm class manage Parsley validated form.
  * Manage its fields and global validation
  *
  * @class ParsleyForm
  * @constructor
  */
  var ParsleyForm = function ( element, options, type ) {
    this.init( element, options, type || 'parsleyForm' );
  };

  ParsleyForm.prototype = {

    constructor: ParsleyForm

    /* init data, bind jQuery on() actions */
    , init: function ( element, options, type ) {
      this.type = type;
      this.items = [];
      this.$element = $( element );
      this.options = options;
      var self = this;

      this.$element.find( options.inputs ).each( function () {
        self.addItem( this );
      });

      this.$element.on( 'submit.' + this.type , false, $.proxy( this.validate, this ) );
    }

    /**
    * Add custom listeners
    *
    * @param {Object} { listener: function () {} }, eg { onFormSubmit: function ( isValid, event, focus ) { ... } }
    */
    , addListener: function ( object ) {
      for ( var listener in object ) {
        if ( new RegExp( 'Field' ).test( listener ) ) {
          for ( var item = 0; item < this.items.length; item++ ) {
            this.items[ item ].addListener( object );
          }
        } else {
          this.options.listeners[ listener ] = object[ listener ];
        }
      }
    }

    /**
    * Adds a new parsleyItem child to ParsleyForm
    *
    * @method addItem
    * @param elem
    */
    , addItem: function ( elem ) {
      if ( $( elem ).is( this.options.excluded ) ) {
        return false;
      }

      var ParsleyField = $( elem ).parsley( this.options );
      ParsleyField.setParent( this );

      this.items.push( ParsleyField );
    }

    /**
    * Removes a parsleyItem child from ParsleyForm
    *
    * @method removeItem
    * @param elem
    * @return {Boolean}
    */
    , removeItem: function ( elem ) {
      var parsleyItem = $( elem ).parsley();

      // identify & remove item if same Parsley hash
      for ( var i = 0; i < this.items.length; i++ ) {
        if ( this.items[ i ].hash === parsleyItem.hash ) {
          this.items[ i ].destroy();
          this.items.splice( i, 1 );
          return true;
        }
      }

      return false;
    }

    /**
    * Process each form field validation
    * Display errors, call custom onFormSubmit() function
    *
    * @method validate
    * @param {Object} event jQuery Event
    * @return {Boolean} Is form valid or not
    */
    , validate: function ( event ) {
      var isValid = true;
      this.focusedField = false;

      for ( var item = 0; item < this.items.length; item++ ) {
        if ( 'undefined' !== typeof this.items[ item ] && false === this.items[ item ].validate() ) {
          isValid = false;

          if ( !this.focusedField && 'first' === this.options.focus || 'last' === this.options.focus ) {
            this.focusedField = this.items[ item ].$element;
          }
        }
      }

      // form is invalid, focus an error field depending on focus policy
      if ( this.focusedField && !isValid ) {
        this.focusedField.focus();
      }

      this.options.listeners.onFormSubmit( isValid, event, this );

      return isValid;
    }

    , isValid: function () {
      for ( var item = 0; item < this.items.length; item++ ) {
        if ( false === this.items[ item ].isFieldValid() ) {
          return false;
        }
      }

      return true;
    }

    /**
    * Remove all errors ul under invalid fields
    *
    * @method removeErrors
    */
    , removeErrors: function () {
      for ( var item = 0; item < this.items.length; item++ ) {
        this.items[ item ].parsley( 'reset' );
      }
    }

    /**
    * destroy Parsley binded on the form and its fields
    *
    * @method destroy
    */
    , destroy: function () {
      for ( var item = 0; item < this.items.length; item++ ) {
        this.items[ item ].destroy();
      }

      this.$element.off( '.' + this.type ).removeData( this.type );
    }
    
    /**
    * reset Parsley binded on the form and its fields
    *
    * @method reset
    */
    , reset: function () {
      for ( var item = 0; item < this.items.length; item++ ) {
        this.items[ item ].reset();
      }
    }
  };

  /**
  * Parsley plugin definition
  * Provides an interface to access public Validator, ParsleyForm and ParsleyField functions
  *
  * @class Parsley
  * @constructor
  * @param {Mixed} Options. {Object} to configure Parsley or {String} method name to call a public class method
  * @param {Function} Callback function
  * @return {Mixed} public class method return
  */
  $.fn.parsley = function ( option, fn ) {
    var options = $.extend( true, {}, $.fn.parsley.defaults, 'undefined' !== typeof window.ParsleyConfig ? window.ParsleyConfig : {}, option, this.data() )
      , newInstance = null;

    function bind ( self, type ) {
      var parsleyInstance = $( self ).data( type );

      // if data never binded or we want to clone a build (for radio & checkboxes), bind it right now!
      if ( !parsleyInstance ) {
        switch ( type ) {
          case 'parsleyForm':
            parsleyInstance = new ParsleyForm( self, options, 'parsleyForm' );
            break;
          case 'parsleyField':
            parsleyInstance = new ParsleyField( self, options, 'parsleyField' );
            break;
          case 'parsleyFieldMultiple':
            parsleyInstance = new ParsleyFieldMultiple( self, options, 'parsleyFieldMultiple' );
            break;
          default:
            return;
        }

        $( self ).data( type, parsleyInstance );
      }

      // here is our parsley public function accessor
      if ( 'string' === typeof option && 'function' === typeof parsleyInstance[ option ] ) {
        var response = parsleyInstance[ option ]( fn );

        return 'undefined' !== typeof response ? response : $( self );
      }

      return parsleyInstance;
    }

    // if a form elem is given, bind all its input children
    if ( $( this ).is( 'form' ) ) {
      newInstance = bind ( $( this ), 'parsleyForm' );

    // if it is a Parsley supported single element, bind it too, except inputs type hidden
    // add here a return instance, cuz' we could call public methods on single elems with data[ option ]() above
    } else if ( $( this ).is( options.inputs ) && !$( this ).is( options.excluded ) ) {
      newInstance = bind( $( this ), !$( this ).is( 'input[type=radio], input[type=checkbox]' ) ? 'parsleyField' : 'parsleyFieldMultiple' );
    }

    return 'function' === typeof fn ? fn() : newInstance;
  };

  $.fn.parsley.Constructor = ParsleyForm;

  /**
  * Parsley plugin configuration
  * 
  * @property $.fn.parsley.defaults
  * @type {Object}
  */
  $.fn.parsley.defaults = {
    // basic data-api overridable properties here..
    inputs: 'input, textarea, select'           // Default supported inputs.
    , excluded: 'input[type=hidden], :disabled' // Do not validate input[type=hidden] & :disabled.
    , trigger: false                            // $.Event() that will trigger validation. eg: keyup, change..
    , animate: true                             // fade in / fade out error messages
    , animateDuration: 300                      // fadein/fadout ms time
    , focus: 'first'                            // 'fist'|'last'|'none' which error field would have focus first on form validation
    , validationMinlength: 3                    // If trigger validation specified, only if value.length > validationMinlength
    , successClass: 'parsley-success'           // Class name on each valid input
    , errorClass: 'parsley-error'               // Class name on each invalid input
    , errorMessage: false                       // Customize an unique error message showed if one constraint fails
    , validators: {}                            // Add your custom validators functions
    , messages: {}                              // Add your own error messages here

    //some quite advanced configuration here..
    , validateIfUnchanged: false                                          // false: validate once by field value change
    , errors: {
        classHandler: function ( elem, isRadioOrCheckbox ) {}             // specify where parsley error-success classes are set
      , container: function ( elem, isRadioOrCheckbox ) {}                // specify an elem where errors will be **apened**
      , errorsWrapper: '<ul></ul>'                                        // do not set an id for this elem, it would have an auto-generated id
      , errorElem: '<li></li>'                                            // each field constraint fail in an li
      }
    , listeners: {
        onFieldValidate: function ( elem, ParsleyForm ) { return false; } // Executed on validation. Return true to ignore field validation
      , onFormSubmit: function ( isFormValid, event, ParsleyForm ) {}     // Executed once on form validation
      , onFieldError: function ( elem, constraints, ParsleyField ) {}     // Executed when a field is detected as invalid
      , onFieldSuccess: function ( elem, constraints, ParsleyField ) {}   // Executed when a field passes validation
    }
  };

  /* PARSLEY auto-bind DATA-API + Global config retrieving
  * =================================================== */
  $( window ).on( 'load', function () {
    $( '[data-validate="parsley"]' ).each( function () {
      $( this ).parsley();
    } );
  } );

// This plugin works with jQuery or Zepto (with data extension built for Zepto.)
}(window.jQuery || window.Zepto);