/*
 * Form Validation: jQuery form validation plug-in v1.0 RC 1
 *
 * Copyright (c) 2006 Jörn Zaefferer
 *
 * Dual licensed under the MIT and GPL licenses:
 *   http://www.opensource.org/licenses/mit-license.php
 *   http://www.gnu.org/licenses/gpl.html
 */
 

jQuery.extend(jQuery.fn, {
	validate: function( options ) {
		var validator = new jQuery.validator( options, this[0] );
		
		if ( validator.settings.onsubmit ) {
		
			// allow suppresing validation by adding a cancel class to the submit button
			this.find("input.cancel:submit").click(function() {
				this.form.cancel = true;
			});
		
			// validate the form on submit
			this.submit( function( event ) {
				if ( validator.settings.debug )
					// prevent form submit to be able to see console output
					event.preventDefault();
					
				// prevent submit for invalid forms or custom submit handlers
				if ( this.cancel || validator.form() ) {
					this.cancel = false;
					return validator.settings.submitHandler
						&& validator.settings.submitHandler( validator.currentForm )
						&& false
						|| true
				} else {
					validator.focusInvalid();
					return false;
				}
			});
		}
		
		if ( validator.settings.event ) {
			// validate all elements on some other event like blur or keypress
			validator.elements.bind( validator.settings.event, function() {
				validator.element(this);
			} );
		}
		
		return validator;
	},
	// destructive add
	push: function( t ) {
		return this.setArray( jQuery.merge( this.get(), t ) );
	},
	forId: function( id ) {
		return this.filter( "[@for='" + id + "']" );
	}
});

 
jQuery.extend(jQuery.expr[":"], {
	blank: "!jQuery.trim(a.value)",
	filled: "!!jQuery.trim(a.value)"
});

// constructor for validator
jQuery.validator = function( options, form ) {
	this.settings = jQuery.extend( {}, jQuery.validator.defaults, options );

	this.currentForm = form;
	this.labelContainer = this.settings.errorLabelContainer;
	this.errorContext = this.labelContainer.length && this.labelContainer || jQuery(form);
	this.containers = this.settings.errorContainer.add( this.settings.errorLabelContainer );

	this.reset();
	this.refresh();
};

jQuery.extend(jQuery.validator, {

	defaults: {
		messages: {},
		errorClass: "error",
		errorElement: "label",
		focusInvalid: true,
		errorContainer: jQuery( [] ),
		errorLabelContainer: jQuery( [] ),
		onsubmit: true
	},
	messages: {
		required: "This field is required.",
		maxLength: "Please enter a value no longer then {0} characters.",
		minLength: "Please enter a value of at least {0} characters.",
		rangeLength: "Please enter a value between {0} and {1} characters long.",
		email: "Please enter a valid email address.",
		url: "Please enter a valid URL.",
		date: "Please enter a valid date.",
		dateISO: "Please enter a valid date (ISO).",
		dateDE: "Bitte geben Sie ein gültiges Datum ein.",
		number: "Please enter a valid number.",
		numberDE: "Bitte geben Sie eine Nummer ein.",
		digits: "Please enter only digits",
		equalTo: "Please enter the same value again.",
		rangeValue: "Please enter a value between {0} and {1}.",
		maxValue: "Please enter a value less than or equal to {0}.",
		minValue: "Please enter a value greater than or equal to {0}.",
		accept: "Please enter a value with a valid extension."
	},
	prototype: {
		form: function() {
			this.prepareForm();
			for ( var i = 0, element; element = this.elements[i]; i++ ) {
				this.check( element );
			}
			return this.valid();
		},
		element: function( element ) {
			this.prepareElement( element );
			var result = this.check( element );
			this.showErrors();
			return result;
		},
		showErrors: function(errors) {
			if(errors) {
				this.deserializeErrorList(errors);
			}
			this.settings.showErrors
				? this.settings.showErrors( this.serializeErrorList(), this )
				: this.defaultShowErrors();
		},
		deserializeErrorList: function(list) {
			for ( name in list ) {
				this.errorList.push({
					message: list[name],
					element: jQuery("[@name=" + name + "]:first", this.currentForm)[0]
				});
			}
		},
		
		serializeErrorList: function() {
			var result = {};
			jQuery.each(this.errorList, function(i, n) {
				if ( !n.message )
					return;
				result[n.element.name] = n.message;
			});
			return result;
		},
		resetForm: function() {
			if( jQuery.fn.resetForm )
				jQuery( this.currentForm ).resetForm();
			this.prepareForm();
			this.hideErrors();
			this.elements.removeClass( this.settings.errorClass );
		},
		
		focusInvalid: function() {
			if( this.settings.focusInvalid ) {
				try {
					jQuery(this.findLastActive() || this.errorList.length && this.errorList[0].element || []).filter(":visible").focus();
				} catch(e) { /* ignore IE throwing errors when focusing hidden elements */ }
			}
		},
		
		findLastActive: function() {
			var lastActive = this.lastActive;
			return lastActive && jQuery.grep(this.errorList, function(n) {
				return n.element.name == lastActive.name;
			}).length == 1 && lastActive;
		},
		
		refresh: function() {
			var validator = this;
			
			// select all valid inputs inside the form (no submit or reset buttons)
			var names = {};
			this.elements = jQuery(this.currentForm).find("input, select, textarea, button").not(":submit").not(":reset").filter(function() {
				
				!this.name && validator.settings.debug && window.console && console.error( "%o has no name assigned", this);
			
				// select only the first element for each name
				if ( this.name in names )
					return false;
				names[this.name] = true;
				return true;
			// and listen for focus events to save reference to last focused element
			}).focus(function() {
				validator.lastActive = this;
				
				// hide error label and remove error class on focus if enabled
				if ( validator.settings.focusCleanup ) {
					$(this).removeClass( validator.settings.errorClass );
					validator.errors().forId( validator.idOrName(this) ).hide();
				}
			});
		},
		
		clean: function( selector ) {
			return jQuery( selector )[0];
		},
		
		errors: function() {
			return jQuery( this.settings.errorElement + "." + this.settings.errorClass, this.errorContext );
		},
		
		reset: function( element ) {
			this.successList = [];
			this.errorList = [];
			this.toShow = jQuery( [] );
			this.toHide = jQuery( [] );
		},
		
		prepareForm: function() {
			this.reset();
			this.toHide = this.errors().push( this.containers );
		},
		
		prepareElement: function( element ) {
			this.reset();
			this.toHide = this.errors().forId( this.clean( element ).name );
		},
	
		check: function( element ) {
			element = this.clean( element );
			jQuery( element ).add( jQuery(element).parent() ).removeClass( this.settings.errorClass );
			var rules = this.rules( element );
			for( var i = 0, rule; rule = rules[i++]; ) {
				try {
					var result = jQuery.validator.methods[rule.method]( jQuery.trim(element.value), element, rule.parameters );
					if( result === -1 )
						break;
					if( !result ) {
						jQuery(element).add( jQuery(element).parent() ).addClass( this.settings.errorClass );
						this.formatAndAdd( rule, element);
						return false;
					}
				} catch(e) {
					this.settings.debug && window.console && console.error("exception occured when checking element " + element.id
						 + ", check the '" + rule.method + "' method");
					throw e;
				}
			}
			// show the label for valid elements if success callback is configured
			if ( this.settings.success )
				this.successList.push(element);
			return true;
		},
		
		message: function( id, rule ) {
			var m = this.settings.messages[id];
			return m && (m.constructor == String
				? m
				: m[rule.method]);
		},
		
		formatAndAdd: function( rule, element) {
			var param = rule.parameters;
			this.errorList.push({
				message: (
						this.message(element.name, rule)
						|| element.title
						|| jQuery.validator.messages[rule.method]
						|| "<strong>Warning: No message defined for " + element.name + "</strong>"
					)
					.replace( "{0}", (param.constructor == Array
						? "" + param[0]
						: "" + param) || "" )
					.replace( "{1}", "" + param[1] || "" ),
				element: element
			});
					
		},
		
		valid: function() {
			this.showErrors();
			return this.errorList.length == 0;
		},
		
		toggle: function(that) {
			var self = this;
			function which() {
				return self["to" + that];
			}
			if ( this.settings.wrapper ) {
				which().push( which().parents( this.settings.wrapper ) );
			}
			which()[that.toLowerCase()]();
			return this;
		},
		
		defaultShowErrors: function() {
			for ( var i = 0, error; error = this.errorList[i]; i++ ) {
				this.showLabel( error.element, error.message );
			}
			if( this.errorList.length ) {
				this.toShow.push( this.containers );
			}
			for ( var i = 0, element; element = this.successList[i]; i++ ) {
				this.showLabel( element );
			}
			this.toHide = this.toHide.not( this.toShow );
			this.toggle( "Hide" ).toggle( "Show" );
		},
		
		showLabel: function(element, message) {
			var label = this.errors().forId( this.idOrName(element) );
			if ( label.length ) {
				// refresh error/success class
				label.removeClass().addClass( this.settings.errorClass );
			
				// check if we have a generated label, replace the message then
				if( this.settings.overrideErrors || label.attr("generated") ) {
					label.html(message);
				}
			} else {
				// create label
				label = jQuery("<" + this.settings.errorElement + ">")
					.attr({"for":  this.idOrName(element), generated: true})
					.addClass(this.settings.errorClass)
					.html(message || "");
				if ( this.settings.wrapper ) {
					// make sure the element is visible, even in IE
					// actually showing the wrapped element is handled elsewhere
					label = label.hide().show().wrap("<" + this.settings.wrapper + ">").parent();
				}
				if ( !this.labelContainer.append(label).length )
					this.settings.errorPlacement
						? this.settings.errorPlacement(label, jQuery(element) )
						: label.insertAfter(element);
			}
			if ( !message && this.settings.success ) {
				label.text("");
				typeof this.settings.success == "string"
					? label.addClass( this.settings.success )
					: this.settings.success( label );
			}
			this.toShow.push(label);
		},
		
		idOrName: function(element) {
			return /radio|checkbox/i.test(element.type) ? element.name : element.id || element.name;
		},

		rules: function( element ) {
			var data = this.data( element );
			if( !data )
				return [];
			var rules = [];
			// convert a simple string to a {string: true} rule, eg. "required" to {required:true}
			if( typeof data == "string" ) {
				var transformed = {};
				transformed[data] = true;
				data = transformed;
			}
			jQuery.each( data, function(key, value) {
				rules[rules.length] = {
					method: key,
					parameters: value
				};
			} );
			return rules;
		},

		data: function( element ) {
			return this.settings.rules
				? this.settings.rules[ element.name ]
				: this.settings.meta
					? jQuery(element).data()[ this.settings.meta ]
					: jQuery(element).data();
		}
		
	},

	getLength: function(value, element) {
		switch( element.nodeName.toLowerCase() ) {
		case 'select':
			return jQuery("option:selected", element).length;
		case 'input':
			if( /radio|checkbox/i.test(element.type) )
				return jQuery(element.form || document).find('[@name="' + element.name + '"]:checked').length;
		}
		return value.length;
	},

	depend: function(param, element) {
		return this.dependTypes[typeof param]
			? this.dependTypes[typeof param](param, element)
			: true;
	},

	dependTypes: {
		"boolean": function(param, element) {
			return param;
		},
		"string": function(param, element) {
			return !!jQuery(param, element.form).length;
		},
		"function": function(param, element) {
			return param(element);
		}
	},

 
	methods: {
		required: function(value, element, param) {
			// check if dependency is met
			if ( !jQuery.validator.depend(param, element) )
				return -1;
			switch( element.nodeName.toLowerCase() ) {
			case 'select':
				var options = jQuery("option:selected", element);
				return options.length > 0 && ( element.type == "select-multiple" || (jQuery.browser.msie && !(options[0].attributes['value'].specified) ? options[0].text : options[0].value).length > 0);
			case 'input':
				if ( /radio|checkbox/i.test(element.type) )
					return jQuery.validator.getLength(value, element) > 0;
			default:
				return value.length > 0;
			}
		},
		minLength: function(value, element, param) {
			var length = jQuery.validator.getLength(value, element);
			return !jQuery.validator.methods.required(value, element) || length >= param;
		},
		maxLength: function(value, element, param) {
			var length = jQuery.validator.getLength(value, element);
			return !jQuery.validator.methods.required(value, element) || length <= param;
		},
		rangeLength: function(value, element, param) {
			var length = jQuery.validator.getLength(value, element);
			return !jQuery.validator.methods.required(value, element) || ( length >= param[0] && length <= param[1] );
		},
		minValue: function( value, element, param ) {
			return !jQuery.validator.methods.required(value, element) || value >= param;
		},
		maxValue: function( value, element, param ) {
			return !jQuery.validator.methods.required(value, element) || value <= param;
		},
		rangeValue: function( value, element, param ) {
			return !jQuery.validator.methods.required(value, element) || ( value >= param[0] && value <= param[1] );
		},
		email: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^[\w-\.]+@([\w-]+\.)+[\w-]{2,4}$/i.test(value);
		},
		url: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^(https?|ftp):\/\/[A-Z0-9](\.?[A-Z0-9ÄÜÖ][A-Z0-9_\-ÄÜÖ]*)*(\/([A-Z0-9ÄÜÖ][A-Z0-9_\-\.ÄÜÖ]*)?)*(\?([A-Z0-9ÄÜÖ][A-Z0-9_\-\.%\+=&ÄÜÖ]*)?)?$/i.test(value);
		},
		date: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || !/Invalid|NaN/.test(new Date(value));
		},
		dateISO: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^\d{4}[/-]\d{1,2}[/-]\d{1,2}$/.test(value);
		},
		dateDE: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^\d\d?\.\d\d?\.\d\d\d?\d?$/.test(value);
		},
		number: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^-?[,0-9]+(\.\d+)?$/.test(value); 
		},
		numberDE: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^-?[\.0-9]+(,\d+)?$/.test(value);
		},
		digits: function(value, element) {
			return !jQuery.validator.methods.required(value, element) || /^\d+$/.test(value);
		},
		accept: function(value, element, param) {
			param = typeof param == "string" ? param : "png|jpe?g|gif";
			return !jQuery.validator.methods.required(value, element) || value.match(new RegExp(".(" + param + ")$")); 
		},
		equalTo: function(value, element, param) {
			return value == jQuery(param).val();
		}
	},
	addMethod: function(name, method, message) {
		jQuery.validator.methods[name] = method;
		jQuery.validator.messages[name] = message;
	}
});