/*
	Class: FormCheck
		Performs different tests on forms and indicates errors.

	Usage:
		Works with these types of fields :
		- input (text, radio, checkbox)
		- textarea
		- select

		You just need to add a specific class to each fields you want to check.
		For example, if you add the class
			(code)
			validate['required','length[4, -1]','differs[email]','digit']
			(end code)
		the value's field must be set (required) with a minimum length of four chars (4, -1),
		must differs of the input named email (differs[email]), and must be digit.
		You can perform check during the datas entry or on the submit action, shows errors as tips or as div after the field,
		show errors one by one or all together, show a list of all errors at the top of the form, localize error messages, add new regex check, ...
		The layout is design only with css. It can also works with multiple forms on a single html page.
		The class supports now internationalization. To use it, simply specify a new <script> element in your html page, like this : <script type="text/javascript" src="formcheck/lang/fr.js"></script>. N.B. : you must load this script before the formcheck and this method overpass the old way. You can create new languages following existing ones. You can otherwise still specifiy the alerts' strings when you initialize the Class, with options.

	Test type:
		You can perform various test on fields by addind them to the validate class. Be careful to *not use space chars*. Here is the list of them.

		required - The field becomes required. This is a regex, you can change it with class options.
		alpha - The value is restricted to alphabetic chars. This is a regex, you can change it with class options.
		alphanum - The value is restricted to alphanumeric characters only. This is a regex, you can change it with class options.
		nodigit - The field doesn't accept digit chars. This is a regex, you can change it with class options.
		digit - The value is restricted to digit (no floating point number) chars, you can pass two arguments (f.e. digit[21,65]) to limit the number between them. Use -1 as second argument to not set a maximum.
		number - The value is restricted to number, including floating point number. This is a regex, you can change it with class options.
		email - The value is restricted to valid email. This is a regex, you can change it with class options.
		phone - The value is restricted to phone chars. This is a regex, you can change it with class options.
		url: - The value is restricted to url. This is a regex, you can change it with class options.
		confirm - The value has to be the same as the one passed in argument. f.e. confirm[password].
		differs - The value has to be diferent as the one passed in argument. f.e. differs[user].
		length - The value length is restricted by argument (f.e. length[6,10]). Use -1 as second argument to not set a maximum.

	Parameters:
		When you initialize the class with addEvent, you can set some options. If you want to modify regex, you must do it in a hash, like for display or alert. You can also add new regex check method by adding the regex and an alert with the same name.

		form_id - The id of the formular. This is required.

		tips_class - The class to apply to tipboxes' errors. By default it is 'tipsbox'.
		error_class - The class to apply to fields with error. By default it is 'error_f'.
		display - This is a hash of display settings. in here you can modify :
		showErrors - 0 : onSubmit, 1 : onSubmit & onBlur, by default it is 1.
		errorsLocation - 1 : tips, 2 : before, 3 : after, by default it is 1.
		indicateErrors - 0 : none, 1 : one by one, 2 : all, by default it is 1.
		tipsOffsetX - Horizontal position of the tips box (margin-left), , by default it is 100 (px).
		tipsOffsetY - Vertical position of the tips box (margin-bottom), , by default it is -10 (px).
		listErrorsAtTop - List all errors at the top of the form, , by default it is false.
		scrollToFirst - Smooth scroll the page to first error and focus on it, by default it is true.
		fadeDuration - Transition duration (in ms), by default it is 300.

		alerts  - This is a hash of alerts settings. in here you can modify strings to localize or wathever else. %0 and %1 represent the argument.

			required: "This field is required.",
			alpha: "This field accepts alphabetic characters only.",
			alphanum: "This field accepts alphanumeric characters only.",
			nodigit: "No digits are accepted.",
			digit: "Please enter a valid integer.",
			digitmin: "The number must be at least %0",
			digitltd: "The value must be between %0 and %1",
			number: "Please enter a valid number.",
			email: "Please enter a valid email.",
			phone: "Please enter a valid phone.",
			url: "Please enter a valid url.",
			confirm: "This field is different from %0",
			differs: "This value must be different of %0",
			length_str: "Text is too short, it must be between %0 and %1",
			lengthmax: "Text is too short, it must be at max %0",
			lengthmin: "Text is too short, it must be at least %0",
			checkbox: "Please check the box",
			radios: "Please select a radio",
			select: "Please choose a value"

	Example:
		You can initialize a formcheck (no scroll, custom classes and alert) by adding for example this in your html head this code :

		(code)
		<script type="text/javascript">
			window.addEvent('domready', function() {
				var myCheck = new FormCheck('form_id', {
					tips_class : 'tips_box',
					error_class : 'error_field',
					display : {
						scrollToFirst : false
					},
					alerts : {
						required : 'This field is ablolutely required! Please enter a value'
					}
				})
			});
		</script>
		(end code)

	About:
		formcheck2.js v.1.2 for mootools v1.1 - 09 / 2007

		by Floor SA (http://www.floor.ch) MIT-style license

		Created by Luca Pillonel and David Mignot, last modified by Luca Pillonel 09.19.07

*/

var FormCheck = new Class({
	options : {

		tips_class: 'tipsbox',			//tips error class
		error_class: 'error_f',			//div error class

		display : {
			showErrors : 1,				//0 : onSubmit, 1 : onSubmit & onBlur
			errorsLocation : 1,			//1 : tips, 2 : before, 3 : after
			indicateErrors : 1,			//0 :  none, 1 : one, 2 : all
			tipsOffsetX : -32,			//Left position of the tips box (margin-left)
			tipsOffsetY : -12,			//Top position of the tips box (margin-bottom)
			tipsPosition : 'relative',	//If you want to set the tips position with relative or absolute value (page not centered)
			tipsContainer : 'undef',	//Container of fields, to get right positions.
			listErrorsAtTop : false,	//list all errors at the top of the form
			scrollToFirst : true,		//Smooth scroll the page to first error
			fadeDuration : 1000			//Transition duration
		},

		alerts : {
			required     : "This field is required.",
			alpha        : "This field accepts alphabetic characters only.",
			alphanum     : "This field accepts alphanumeric characters only.",
			nodigit      : "No digits are accepted.",
			digit        : "Please enter a valid integer.",
			digitmin     : "The number must be at least %0",
			digitltd     : "The value must be between %0 and %1",
			number       : "Please enter a valid number.",
			email        : "Please enter a valid email: <br /><span>E.g. yourname@domain.com</span>",
			spamcheck    : "<span>2 + 3 = ???</span>",
			phone        : "Please enter a valid phone.",
			url          : "Please enter a valid url: <br /><span>E.g. http://www.domain.com</span>",
			confirm      : "This field is different from %0",
			differs      : "This value must be different of %0",
			length_str   : "Text is too short, it must be between %0 and %1",
			lengthmax    : "Text is too short, it must be at max %0",
			lengthmin    : "Text is too short, it must be at least %0 characters.",
			checkbox     : "Please check the box",
			radios       : "Please select a radio",
			select       : "Please choose a value"
		},

		regexp : {
			required     : /[^.*]/,
			alpha        : /^[a-z ._-]+$/i,
			alphanum     : /^[a-z0-9 ._-]+$/i,
			digit        : /^[-+]?[0-9]+$/,
			nodigit      : /^[^0-9]+$/,
			spamcheck    : /^[5]+$/,
			number       : /^[-+]?\d*\.?\d+$/,
			email        : /^[a-z0-9._%-]+@[a-z0-9.-]+\.[a-z]{2,4}$/i,
			phone        : /^[\d\s ().-]+$/,
			url          : /^(http|https|ftp)\:\/\/[a-z0-9\-\.]+\.[a-z]{2,3}(:[a-z0-9]*)?\/?([a-z0-9\-\._\?\,\'\/\\\+&amp;%\$#\=~])*$/i
		}
	},



	/*
	Constructor: initialize
		Constructor

		Add event on formular and perform some stuff, you now, like settings, ...
	*/
	initialize : function(form, options) {
		if (this.form = $(form)) {
			this.form.isValid = true;
			this.regex = ['length'];
			this.setOptions(options);

			//internalization
			if (typeof(formcheckLanguage) != 'undefined') this.options.alerts = formcheckLanguage;

			this.validations = [];
			this.alreadyIndicated = false;
			this.firstError = false;

			var regex = new Hash(this.options.regexp);
			regex.each(function(el, key) {
				this.regex.push(key);
			}, this)

			this.form.getElements("*[class*=validate]").each(function(el) {
				el.validation = [];
				var classes = el.getProperty("class").split(' ');
				classes.each(function(classX) {
					if(classX.match(/^validate(\[.+\])$/)) {
						var validators = eval(classX.match(/^validate(\[.+\])$/)[1]);
						for(var i = 0; i < validators.length; i++) {
							el.validation.push(validators[i]);
						}
						this._register(el);
					}
				}, this);
			}, this);

			this.form.addEvents({
				"submit": this._onSubmit.bind(this)
			});
		}
	},

	/*
	Function: _register
		Private method

		Add listener on fields
	*/
	_register : function(el) {
		this.validations.push(el);
		el.errors = [];
		if (this._isChildType(el) == false && this.options.display.showErrors == 1) el.addEvent('blur', function() {
			this._manageError(el, 'blur');
		}.bind(this));
	},

	/*
	Function: _validate
		Private method

		Dispatch check to other methods
	*/
	_validate : function(el) {
		el.errors = [];
		el.isOk = true;
		//On valide l'élément qui n'est pas un radio ni checkbox
		el.validation.each(function(rule) {
			if(this._isChildType(el)) {
				if (this._validateGroup(el) == false) {
					el.isOk = false;
				}
			} else {
				var ruleArgs = [];
				if(rule.match(/^.+\[/)) {
					var ruleMethod = rule.split('[')[0];
					var ruleArgs = eval(rule.match(/^.+(\[.+\])$/)[1].replace(/([A-Z]+)/i, "'$1'"));
				} else var ruleMethod = rule;

				if (this.regex.contains(ruleMethod)) {
					if (this._validateRegex(el, ruleMethod, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				if (ruleMethod == 'confirm') {
					if (this._validateConfirm(el, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				if (ruleMethod == 'differs') {
					if (this._validateDiffers(el, ruleArgs) == false) {
						el.isOk = false;
					}
				}
				if (el.getTag() == "select" || el.type == "checkbox") {
					if (this._simpleValidate(el) == false) {
						el.isOk = false;
					}
				}
			}
		}, this);

		if (el.isOk) return true;
		else return false;
	},

	/*
	Function: _simpleValidate
		Private method

		Perform simple check for select fields and checkboxes
	*/
	_simpleValidate : function(el) {
		if (el.getTag() == 'select' && (el.value == el.options[0].value)) {
			el.errors.push(this.options.alerts.select);
			return false;
		} else if (el.type == "checkbox" && el.checked == false) {
			el.errors.push(this.options.alerts.checkbox);
			return false;
		}
		return true;
	},

	/*
	Function: _validateRegex
		Private method

		Perform regex validations
	*/
	_validateRegex : function(el, ruleMethod, ruleArgs) {
		var msg = "";
		if (ruleArgs[1] && ruleMethod == 'length') {
			if (ruleArgs[1] == -1) {
				this.options.regexp.length = new RegExp("^.{"+ ruleArgs[0] +",}$");
				msg = this.options.alerts.lengthmin.replace("%0",ruleArgs[0]);
			} else {
				this.options.regexp.length = new RegExp("^.{"+ ruleArgs[0] +","+ ruleArgs[1] +"}$");
				msg = this.options.alerts.length_str.replace("%0",ruleArgs[0]).replace("%1",ruleArgs[1]);
			}
		} else if (ruleArgs[0]) {
			this.options.regexp.length = new RegExp("^.{0,"+ ruleArgs[0] +"}$");
			msg = this.options.alerts.lengthmax.replace("%0",ruleArgs[0]);
		} else {
			msg = this.options.alerts[ruleMethod];
		}
		if (ruleArgs[1] && ruleMethod == 'digit') {
			var regres = true;
			if (!this.options.regexp.digit.test(el.value)) {
				el.errors.push(this.options.alerts[ruleMethod]);
				regres = false;
			}
			if (ruleArgs[1] == -1) {
				if (el.value >= ruleArgs[0]) var valueres = true; else var valueres = false;
				msg = this.options.alerts.digitmin.replace("%0",ruleArgs[0]);
			} else {
				if (el.value >= ruleArgs[0] && el.value <= ruleArgs[1]) var valueres = true; else var valueres = false;
				msg = this.options.alerts.digitltd.replace("%0",ruleArgs[0]).replace("%1",ruleArgs[1]);
			}
			if (regres == false || valueres == false) {
				el.errors.push(msg);
				return false;
			}
		} else if (this.options.regexp[ruleMethod].test(el.value) == false)  {
			el.errors.push(msg);
			return false;
		}
		return true;
	},

	/*
	Function: _validateConfirm
		Private method

		Perform confirm validations
	*/
	_validateConfirm: function(el,ruleArgs) {
		if (el.validation.contains('required') == false) {
			//el.validation.push('required');
		}
		var confirm = ruleArgs[0];
		if(el.value != this.form[confirm].value){
			msg = this.options.alerts.confirm.replace("%0",ruleArgs[0]);
			el.errors.push(msg);
			return false;
		}
		return true;
	},

	/*
	Function: _validateDiffers
		Private method

		Perform differs validations
	*/
	_validateDiffers: function(el,ruleArgs) {
		var confirm = ruleArgs[0];
		if(el.value == this.form[confirm].value){
			msg = this.options.alerts.differs.replace("%0",ruleArgs[0]);
			el.errors.push(msg);
			return false;
		}
		return true;
	},

	/*
	Function: _isChildType
		Private method

		Determine if the field is a group of radio or not.
	*/
	_isChildType: function(el) {
		var elType = el.type.toLowerCase();
		if((elType == "radio")) return true;
		return false;
	},

	/*
	Function: _validateGroup
		Private method

		Perform radios validations
	*/
	_validateGroup : function(el) {
		el.errors = [];
		var nlButtonGroup = this.form[el.getProperty("name")];
		el.group = nlButtonGroup;
		var cbCheckeds = false;

		for(var i = 0; i < nlButtonGroup.length; i++) {
			if(nlButtonGroup[i].checked) {
				cbCheckeds = true;
			}
		}
		if(cbCheckeds == false) {
			el.errors.push(this.options.alerts.radios);
			return false;
		} else {
			return true;
		}
	},

	/*
	Function: _listErrorsAtTop
		Private method

		Display errors
	*/
	_listErrorsAtTop : function(obj) {
		if(!this.form.element) {
			 this.form.element = new Element('div', {'id' : 'errorlist', 'class' : this.options.error_class}).injectTop(this.form);
		}
		if ($type(obj) == 'collection') {
			new Element('p').setHTML("<span>" + obj[0].name + " : </span>" + obj[0].errors[0]).injectInside(this.form.element);
		} else {
			if ((obj.validation.contains('required') && obj.errors.length > 0) || (obj.errors.length > 0 && obj.value && obj.validation.contains('required') == false)) {
				obj.errors.each(function(error) {
					new Element('p').setHTML("<span>" + obj.name + " : </span>" + error).injectInside(this.form.element);
				}, this);
			}
		}
	},

	/*
	Function: _manageError
		Private method

		Manage display of errors boxes
	*/
	_manageError : function(el, method) {
		var isValid = this._validate(el);
		if (((!isValid && el.validation.contains('required')) || (!el.validation.contains('required') && el.value && !isValid))) {
			if(this.options.display.listErrorsAtTop == true && method == 'submit')
				this._listErrorsAtTop(el, method);
			if (this.options.display.indicateErrors == 2 ||this.alreadyIndicated == false || el.name == this.alreadyIndicated.name)
				{
					this._addError(el);
					return false;
				}
		} else if ((isValid || (!el.validation.contains('required') && !el.value)) && el.element) {
			this._removeError(el);
			return true;
		}
		return true;
	},

	/*
	Function: _addError
		Private method

		Add error message
	*/
	_addError : function(obj) {
		this.alreadyIndicated = obj;
		if(!this.firstError) this.firstError = obj;
		if(!obj.element) {
			if (this.options.display.errorsLocation == 1) {
				if (this.options.display.tipsPosition == 'relative') {
					var marginLeft = this.options.display.tipsOffsetX;
					if (this.options.display.tipsContainer = 'undef')
						var displacement = this.form.getCoordinates().left;
					else
						var displacement = $(this.options.display.tipsContainer).getCoordinates().left;
					var options = {
						'opacity' : 0
					}
				} else if (this.options.display.tipsPosition == 'absolute') {
					var options = {
						'opacity' : 0,
					}
				}
					obj.element = new Element('div', {'id' : 'diverror' + obj.name, 'class' : this.options.tips_class, 'styles' : options});
					obj.element.injectInside(this.form);

			} else if (this.options.display.errorsLocation == 2){
				obj.element = new Element('div', {'id' : 'diverror' + obj.name, 'class' : this.options.error_class, 'styles' : {'opacity' : 0}});
				obj.element.injectBefore(obj);
			} else if (this.options.display.errorsLocation == 3){
				obj.element = new Element('div', {'id' : 'diverror' + obj.name, 'class' : this.options.error_class, 'styles' : {'opacity' : 0}});

				if ($type(obj.group) == 'object' || $type(obj.group) == 'collection')
					obj.element.injectAfter(obj.group[obj.group.length-1]);
				else
					obj.element.injectAfter(obj);
			}
		}
		if (obj.element) {
			obj.element.empty();
			if (this.options.display.errorsLocation == 1) {
				var errors = [];
				obj.errors.each(function(error) {
					errors.push(new Element('p').setHTML(error));
				});
				var tips = this._makeTips(errors).injectInside(obj.element);
			} else {
				obj.errors.each(function(error) {
					new Element('p').setHTML(error).injectInside(obj.element);
				});
			}

			if (!window.ie7 && obj.element.getStyle('opacity') == 0)
				new Fx.Styles(obj.element, {'duration' : this.options.display.fadeDuration}).start({'opacity':[1]});
			else
				obj.element.setStyle('opacity', 1);
		}
	},

	/*
	Function: _removeError
		Private method

		Remove the error display
	*/
	_removeError : function(obj) {
		this.firstError = false;
		this.alreadyIndicated = false;
		obj.errors = [];
		obj.isOK = true;
		if (this.options.display.errorsLocation == 2)
			new Fx.Styles(obj.element, {'duration' : this.options.display.fadeDuration}).start({ 'height':[0] });
		if (!window.ie7) {
			new Fx.Styles(obj.element, {
				'duration' : this.options.display.fadeDuration,
				'onComplete' : function() {
					if (obj.element) {
						obj.element.remove();
						obj.element = false;
					}
				}.bind(this)
			}).start({ 'opacity':[1,0] });
		} else {
			obj.element.remove();
			obj.element = false;
		}
	},

	/*
	Function: _focusOnError
		Private method

		Create set the focus to the first field with an error if needed
	*/
	_focusOnError : function (obj) {
		if (this.options.display.scrollToFirst && !this.alreadyFocused && this.alreadyIndicated.element && !this.isScrolling) {
			if (this.options.display.errorsLocation == 1) new Fx.Scroll(window, {onComplete : function() {this.isScrolling = false;}.bind(this)}).scrollTo(0,obj.element.getCoordinates().top);
			else if (this.options.display.errorsLocation == 2) new Fx.Scroll(window, {onComplete : function() {this.isScrolling = false;}.bind(this)}).scrollTo(0,obj.getCoordinates().top-30);
			this.isScrolling = true;
			obj.focus();
			this.alreadyFocused = true;
		} else if (this.options.display.scrollToFirst && !this.isScrolling) {
			new Fx.Scroll(window, {onComplete : function() {this.isScrolling = false;}.bind(this)}).scrollTo(0,obj.getCoordinates().top-30);
			this.isScrolling = true;
			obj.focus();
			this.alreadyFocused = true;
		}
	},

	/*
	Function: _makeTips
		Private method

		Create tips boxes
	*/
	_makeTips : function(txt) {
		var table = new Element('table', {'class' : 'tipsbox'});
			table.cellPadding ='0';
			table.cellSpacing ='0';
			table.border ='0';

			var tbody = new Element('tbody').injectInside(table);
				var tr1 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'tipsbox_top_left'}).injectInside(tr1);
					new Element('td', {'class' : 'tipsbox_top'}).injectInside(tr1);
					new Element('td', {'class' : 'tipsbox_top_right'}).injectInside(tr1);
				var tr2 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'tipsbox_left'}).injectInside(tr2);
					var errors = new Element('td', {'class' : 'tipsbox_inner'}).injectInside(tr2);
					var errorImg = new Element('div', {'class' : 'tipsbox_error'}).injectInside(errors);
					txt.each(function(error) {
						error.injectInside(errors);
					});
					new Element('td', {'class' : 'tipsbox_right'}).injectInside(tr2);
				var tr3 = new Element('tr').injectInside(tbody);
					new Element('td', {'class' : 'tipsbox_bottom_left'}).injectInside(tr3);
					new Element('td', {'class' : 'tipsbox_mark'}).injectInside(tr3);
					new Element('td', {'class' : 'tipsbox_bottom_right'}).injectInside(tr3);
		return table;
	},

	/*
	Function: _reinitialize
		Private method

		Reinitialize form before submit check
	*/
	_reinitialize: function() {
		this.validations.each(function(el) {
			if (el.element) {
				el.errors = [];
				el.isOK = true;
				el.element.remove();
				el.element = false;
			}
		});
		if (this.form.element) this.form.element.empty();
		this.alreadyFocused = false;
		this.firstError = false;
		this.alreadyIndicated = false;
		this.form.isValid = true;
	},

	/*
	Function: _onSubmit
		Private method

		Perform check on submit action
	*/
	_onSubmit: function(event) {
		this._reinitialize();

		this.validations.each(function(el) {
			if(!this._manageError(el,'submit')) this.form.isValid = false;
		}, this);
		if(!this.form.isValid) {
			new Event(event).stop();
			if (this.firstError) this._focusOnError(this.firstError);
		}
	}
});
FormCheck.implement(new Options());