/*
---

script: Form.Validator.js

name: Form.Validator

description: A css-class based form validation system.

license: MIT-style license

authors:
  - Aaron Newton

requires:
  - Core/Options
  - Core/Events
  - Core/Selectors
  - Core/Element.Event
  - Core/Element.Style
  - Core/JSON
  - /Lang
  - /Class.Binds
  - /Date 
  - /Element.Forms
  - /Form.Validator.English
  - /Element.Shortcuts

provides: [Form.Validator, InputValidator, FormValidator.BaseValidators]

...
*/
if (!window.Form) window.Form = {};

var InputValidator = new Class({

	Implements: [Options],

	options: {
		errorMsg: 'Validation failed.',
		test: function(field){return true;}
	},

	initialize: function(className, options){
		this.setOptions(options);
		this.className = className;
	},

	test: function(field, props){
		if (document.id(field)) return this.options.test(document.id(field), props||this.getProps(field));
		else return false;
	},

	getError: function(field, props){
		var err = this.options.errorMsg;
		if ($type(err) == 'function') err = err(document.id(field), props||this.getProps(field));
		return err;
	},

	getProps: function(field){
		if (!document.id(field)) return {};
		return field.get('validatorProps');
	}

});

Element.Properties.validatorProps = {

	set: function(props){
		return this.eliminate('validatorProps').store('validatorProps', props);
	},

	get: function(props){
		if (props) this.set(props);
		if (this.retrieve('validatorProps')) return this.retrieve('validatorProps');
		if (this.getProperty('validatorProps')){
			try {
				this.store('validatorProps', JSON.decode(this.getProperty('validatorProps')));
			}catch(e){
				return {};
			}
		} else {
			var vals = this.get('class').split(' ').filter(function(cls){
				return cls.test(':');
			});
			if (!vals.length){
				this.store('validatorProps', {});
			} else {
				props = {};
				vals.each(function(cls){
					var split = cls.split(':');
					if (split[1]) {
						try {
							props[split[0]] = JSON.decode(split[1]);
						} catch(e) {}
					}
				});
				this.store('validatorProps', props);
			}
		}
		return this.retrieve('validatorProps');
	}

};

Form.Validator = new Class({

	Implements:[Options, Events],

	Binds: ['onSubmit'],

	options: {/*
		onFormValidate: $empty(isValid, form, event),
		onElementValidate: $empty(isValid, field, className, warn),
		onElementPass: $empty(field),
		onElementFail: $empty(field, validatorsFailed) */
		fieldSelectors: 'input, select, textarea',
		ignoreHidden: true,
		ignoreDisabled: true,
		useTitles: false,
		evaluateOnSubmit: true,
		evaluateFieldsOnBlur: true,
		evaluateFieldsOnChange: true,
		serial: true,
		stopOnFailure: true,
		warningPrefix: function(){
			return Form.Validator.getMsg('warningPrefix') || 'Warning: ';
		},
		errorPrefix: function(){
			return Form.Validator.getMsg('errorPrefix') || 'Error: ';
		}
	},

	initialize: function(form, options){
		this.setOptions(options);
		this.element = document.id(form);
		this.element.store('validator', this);
		this.warningPrefix = $lambda(this.options.warningPrefix)();
		this.errorPrefix = $lambda(this.options.errorPrefix)();
		if (this.options.evaluateOnSubmit) this.element.addEvent('submit', this.onSubmit);
		if (this.options.evaluateFieldsOnBlur || this.options.evaluateFieldsOnChange) this.watchFields(this.getFields());
	},

	toElement: function(){
		return this.element;
	},

	getFields: function(){
		return (this.fields = this.element.getElements(this.options.fieldSelectors));
	},

	watchFields: function(fields){
		fields.each(function(el){
			if (this.options.evaluateFieldsOnBlur)
				el.addEvent('blur', this.validationMonitor.pass([el, false], this));
			if (this.options.evaluateFieldsOnChange)
				el.addEvent('change', this.validationMonitor.pass([el, true], this));
		}, this);
	},

	validationMonitor: function(){
		$clear(this.timer);
		this.timer = this.validateField.delay(50, this, arguments);
	},

	onSubmit: function(event){
		if (!this.validate(event) && event) event.preventDefault();
		else this.reset();
	},

	reset: function(){
		this.getFields().each(this.resetField, this);
		return this;
	},

	validate: function(event){
		var result = this.getFields().map(function(field){
			return this.validateField(field, true);
		}, this).every(function(v){ return v;});
		this.fireEvent('formValidate', [result, this.element, event]);
		if (this.options.stopOnFailure && !result && event) event.preventDefault();
		return result;
	},

	validateField: function(field, force){
		if (this.paused) return true;
		field = document.id(field);
		var passed = !field.hasClass('validation-failed');
		var failed, warned;
		if (this.options.serial && !force){
			failed = this.element.getElement('.validation-failed');
			warned = this.element.getElement('.warning');
		}
		if (field && (!failed || force || field.hasClass('validation-failed') || (failed && !this.options.serial))){
			var validators = field.className.split(' ').some(function(cn){
				return this.getValidator(cn);
			}, this);
			var validatorsFailed = [];
			field.className.split(' ').each(function(className){
				if (className && !this.test(className, field)) validatorsFailed.include(className);
			}, this);
			passed = validatorsFailed.length === 0;
			if (validators && !field.hasClass('warnOnly')){
				if (passed){
					field.addClass('validation-passed').removeClass('validation-failed');
					this.fireEvent('elementPass', field);
				} else {
					field.addClass('validation-failed').removeClass('validation-passed');
					this.fireEvent('elementFail', [field, validatorsFailed]);
				}
			}
			if (!warned){
				var warnings = field.className.split(' ').some(function(cn){
					if (cn.test('^warn-') || field.hasClass('warnOnly'))
						return this.getValidator(cn.replace(/^warn-/,''));
					else return null;
				}, this);
				field.removeClass('warning');
				var warnResult = field.className.split(' ').map(function(cn){
					if (cn.test('^warn-') || field.hasClass('warnOnly'))
						return this.test(cn.replace(/^warn-/,''), field, true);
					else return null;
				}, this);
			}
		}
		return passed;
	},

	test: function(className, field, warn){
		field = document.id(field);
		if((this.options.ignoreHidden && !field.isVisible()) || (this.options.ignoreDisabled && field.get('disabled'))) return true;
		var validator = this.getValidator(className);
		warn = $pick(warn, false);
		if (field.hasClass('warnOnly')) warn = true;
		var isValid = field.hasClass('ignoreValidation') || (validator ? validator.test(field) : true);
		if (validator && field.isVisible()) this.fireEvent('elementValidate', [isValid, field, className, warn]);
		if (warn) return true;
		return isValid;
	},

	resetField: function(field){
		field = document.id(field);
		if (field){
			field.className.split(' ').each(function(className){
				if (className.test('^warn-')) className = className.replace(/^warn-/, '');
				field.removeClass('validation-failed');
				field.removeClass('warning');
				field.removeClass('validation-passed');
			}, this);
		}
		return this;
	},

	stop: function(){
		this.paused = true;
		return this;
	},

	start: function(){
		this.paused = false;
		return this;
	},

	ignoreField: function(field, warn){
		field = document.id(field);
		if (field){
			this.enforceField(field);
			if (warn) field.addClass('warnOnly');
			else field.addClass('ignoreValidation');
		}
		return this;
	},

	enforceField: function(field){
		field = document.id(field);
		if (field) field.removeClass('warnOnly').removeClass('ignoreValidation');
		return this;
	}

});

Form.Validator.getMsg = function(key){
	return MooTools.lang.get('Form.Validator', key);
};

Form.Validator.adders = {

	validators:{},

	add : function(className, options){
		this.validators[className] = new InputValidator(className, options);
		//if this is a class (this method is used by instances of Form.Validator and the Form.Validator namespace)
		//extend these validators into it
		//this allows validators to be global and/or per instance
		if (!this.initialize){
			this.implement({
				validators: this.validators
			});
		}
	},

	addAllThese : function(validators){
		$A(validators).each(function(validator){
			this.add(validator[0], validator[1]);
		}, this);
	},

	getValidator: function(className){
		return this.validators[className.split(':')[0]];
	}

};

$extend(Form.Validator, Form.Validator.adders);

Form.Validator.implement(Form.Validator.adders);

Form.Validator.add('IsEmpty', {

	errorMsg: false,
	test: function(element){
		if (element.type == 'select-one' || element.type == 'select')
			return !(element.selectedIndex >= 0 && element.options[element.selectedIndex].value != '');
		else
			return ((element.get('value') == null) || (element.get('value').length == 0));
	}

});

Form.Validator.addAllThese([

	['required', {
		errorMsg: function(){
			return Form.Validator.getMsg('required');
		},
		test: function(element){
			return !Form.Validator.getValidator('IsEmpty').test(element);
		}
	}],

	['minLength', {
		errorMsg: function(element, props){
			if ($type(props.minLength))
				return Form.Validator.getMsg('minLength').substitute({minLength:props.minLength,length:element.get('value').length });
			else return '';
		},
		test: function(element, props){
			if ($type(props.minLength)) return (element.get('value').length >= $pick(props.minLength, 0));
			else return true;
		}
	}],

	['maxLength', {
		errorMsg: function(element, props){
			//props is {maxLength:10}
			if ($type(props.maxLength))
				return Form.Validator.getMsg('maxLength').substitute({maxLength:props.maxLength,length:element.get('value').length });
			else return '';
		},
		test: function(element, props){
			//if the value is <= than the maxLength value, element passes test
			return (element.get('value').length <= $pick(props.maxLength, 10000));
		}
	}],

	['validate-integer', {
		errorMsg: Form.Validator.getMsg.pass('integer'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) || (/^(-?[1-9]\d*|0)$/).test(element.get('value'));
		}
	}],

	['validate-numeric', {
		errorMsg: Form.Validator.getMsg.pass('numeric'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) ||
				(/^-?(?:0$0(?=\d*\.)|[1-9]|0)\d*(\.\d+)?$/).test(element.get('value'));
		}
	}],

	['validate-digits', {
		errorMsg: Form.Validator.getMsg.pass('digits'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) || (/^[\d() .:\-\+#]+$/.test(element.get('value')));
		}
	}],

	['validate-alpha', {
		errorMsg: Form.Validator.getMsg.pass('alpha'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) ||  (/^[a-zA-Z]+$/).test(element.get('value'));
		}
	}],

	['validate-alphanum', {
		errorMsg: Form.Validator.getMsg.pass('alphanum'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) || !(/\W/).test(element.get('value'));
		}
	}],

	['validate-date', {
		errorMsg: function(element, props){
			if (Date.parse){
				var format = props.dateFormat || '%x';
				return Form.Validator.getMsg('dateSuchAs').substitute({date: new Date().format(format)});
			} else {
				return Form.Validator.getMsg('dateInFormatMDY');
			}
		},
		test: function(element, props){
			if (Form.Validator.getValidator('IsEmpty').test(element)) return true;
			var d;
			if (Date.parse){
				var format = props.dateFormat || '%x';
				d = Date.parse(element.get('value'));
				var formatted = d.format(format);
				if (formatted != 'invalid date') element.set('value', formatted);
				return !isNaN(d);
			} else {
				var regex = /^(\d{2})\/(\d{2})\/(\d{4})$/;
				if (!regex.test(element.get('value'))) return false;
				d = new Date(element.get('value').replace(regex, '$1/$2/$3'));
				return (parseInt(RegExp.$1, 10) == (1 + d.getMonth())) &&
					(parseInt(RegExp.$2, 10) == d.getDate()) &&
					(parseInt(RegExp.$3, 10) == d.getFullYear());
			}
		}
	}],

	['validate-email', {
		errorMsg: Form.Validator.getMsg.pass('email'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) || (/^[A-Z0-9._%+-]+@[A-Z0-9.-]+\.[A-Z]{2,4}$/i).test(element.get('value'));
		}
	}],

	['validate-url', {
		errorMsg: Form.Validator.getMsg.pass('url'),
		test: function(element){
			return Form.Validator.getValidator('IsEmpty').test(element) || (/^(https?|ftp|rmtp|mms):\/\/(([A-Z0-9][A-Z0-9_-]*)(\.[A-Z0-9][A-Z0-9_-]*)+)(:(\d+))?\/?/i).test(element.get('value'));
		}
	}],

	['validate-currency-dollar', {
		errorMsg: Form.Validator.getMsg.pass('currencyDollar'),
		test: function(element){
			// [$]1[##][,###]+[.##]
			// [$]1###+[.##]
			// [$]0.##
			// [$].##
			return Form.Validator.getValidator('IsEmpty').test(element) ||  (/^\$?\-?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}\d*(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$/).test(element.get('value'));
		}
	}],

	['validate-one-required', {
		errorMsg: Form.Validator.getMsg.pass('oneRequired'),
		test: function(element, props){
			var p = document.id(props['validate-one-required']) || element.getParent(props['validate-one-required']);
			return p.getElements('input').some(function(el){
				if (['checkbox', 'radio'].contains(el.get('type'))) return el.get('checked');
				return el.get('value');
			});
		}
	}]

]);

Element.Properties.validator = {

	set: function(options){
		var validator = this.retrieve('validator');
		if (validator) validator.setOptions(options);
		return this.store('validator:options', options);
	},

	get: function(options){
		if (options || !this.retrieve('validator')){
			if (options || !this.retrieve('validator:options')) this.set('validator', options);
			this.store('validator', new Form.Validator(this, this.retrieve('validator:options')));
		}
		return this.retrieve('validator');
	}

};

Element.implement({

	validate: function(options){
		if (options) this.set('validator', options);
		return this.get('validator', options).validate();
	}

});
//legacy
var FormValidator = Form.Validator;
