validation.js

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/*
* Really easy field validation with Prototype
* http://tetlaw.id.au/view/javascript/really-easy-field-validation
* Andrew Tetlaw
* Version 1.5.4.1 (2007-01-05)
* 
* Copyright (c) 2007 Andrew Tetlaw
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation
* files (the "Software"), to deal in the Software without
* restriction, including without limitation the rights to use, copy,
* modify, merge, publish, distribute, sublicense, and/or sell copies
* of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
* 
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
* 
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
* 
*/
var Validator = Class.create();

Validator.prototype = {
	initialize : function(className, error, test, options) {
		if (typeof test == 'function') {
			this.options = $H(options);
			this._test = test;
		} else {
			this.options = $H(test);
			this._test = function(){return true};
		}
		this.error = error || 'Validation failed.';
		this.className = className;
	},
	test : function(v, elm) {
		return (this._test(v,elm) && this.options.all(
			function(p){
				return Validator.methods[p.key] ? Validator.methods[p.key](v,elm,p.value) : true;
			}
		));
	}
}
Validator.methods = {
	pattern : function(v,elm,opt) {
		return Validation.get('IsEmpty').test(v) || opt.test(v)
	},
	minLength : function(v,elm,opt) {
		return v.length >= opt
	},
	maxLength : function(v,elm,opt) {
		return v.length <= opt
	},
	min : function(v,elm,opt) {
		return v >= parseFloat(opt)
	}, 
	max : function(v,elm,opt) {return v <= parseFloat(opt)},
	notOneOf : function(v,elm,opt) {return $A(opt).all(function(value) {
		return v != value;
	})},
	oneOf : function(v,elm,opt) {return $A(opt).any(function(value) {
		return v == value;
	})},
	is : function(v,elm,opt) {return v == opt},
	isNot : function(v,elm,opt) {return v != opt},
	equalToField : function(v,elm,opt) {return v == $F(opt)},
	notEqualToField : function(v,elm,opt) {return v != $F(opt)},
	include : function(v,elm,opt) {return $A(opt).all(function(value) {
		return Validation.get(value).test(v,elm);
	})}
}

var Validation = Class.create();

Validation.prototype = {
	initialize : function(form, options) {
		this.options = Object.extend(
			{
				onSubmit : true,
				stopOnFirst : false,
				immediate : false,
				focusOnError : true,
				useTitles : false,
				onFormValidate : function(result, form) {},
				onElementValidate : function(result, elm) {}
			},
			options || {}
		);
		this.form = form;
		if(this.options.onSubmit) {
			Event.observe(this.form, 'submit', this.onSubmit.bind(this), false);
		}
		if(this.options.immediate) {
			var useTitles = this.options.useTitles;
			var callback = this.options.onElementValidate;
			Form.getElements(this.form).each(
				function(input) {
					Event.observe(input, 'blur',
						function(ev){
							Validation.runtime.advice = false;
							Validation.runtime.elm = Event.element(ev);
							Validation.runtime.options = {useTitle : useTitles, onElementValidate : callback};
							setTimeout('Validation.validate()',100);
							for (obj=Event.element(ev).parentNode; obj.tagName!='TD'; obj=obj.parentNode) {;}
							obj = obj.nextSibling;
							if (obj && obj.className=='helpMsg' && obj.innerHTML!='') {
								obj.firstChild.style.display = 'none';
							}
						}
					);
					Event.observe(input, 'click', 
						function(ev){
							for (obj=Event.element(ev).parentNode; obj.tagName!='TD'; obj=obj.parentNode) {;}
							obj = obj.nextSibling;
							if (obj && obj.className=='helpMsg' && obj.innerHTML != '') {
								obj.firstChild.style.display = 'block';
							}
						}
					);
				}
			);
		}
	},
	onSubmit :  function(ev){
		Event.stop(ev);
		this.validate();
	},
	validate : function() {
		Validation.runtime.advice = true;
		var result = false;
		var useTitles = this.options.useTitles;
		var callback = this.options.onElementValidate;
		if(this.options.stopOnFirst) {
			result = Form.getElements(this.form).all(function(elm) { return Validation.validate(elm,{useTitle : useTitles, onElementValidate : callback}); });
		} else {
			result = Form.getElements(this.form).collect(
				function(elm) {
					return Validation.validate(elm,{useTitle : useTitles, onElementValidate : callback}); 
				}
			).all();
		}
		if(!result && this.options.focusOnError) {
			Form.getElements(this.form).findAll(function(elm){return $(elm).hasClassName('validation-failed')}).first().focus()
		}
		this.options.onFormValidate(result, this.form);
		return result;
	},
	reset : function() {
		Form.getElements(this.form).each(Validation.reset);
	}
}

Object.extend(
	Validation, {
		runtime : {
			advice:true,
			checkNow:true,
			elm:{},
			options:{}
		},
		validate : function(elm, options){
			if(Validation.runtime.checkNow){
				if(!elm) {
					elm = Validation.runtime.elm;
				}
				if(!options) {
					optioins = Validation.runtime.options;
				}
				options = Object.extend(
					{
						useTitle : false,
						onElementValidate : function(result, elm) {}
					},
					options || {}
				);
				elm = $(elm);
				var cn = elm.classNames();
				return result = cn.all(
					function(value) {
						var test = Validation.test(value,elm,options.useTitle);
						options.onElementValidate(test, elm);
						return test;
					}
				);
			}
		},
		test : function(name, elm, useTitle) {
			if(elm.type=='submit') {
				return true;
			}
			var v = Validation.get(name);
			var prop = '__advice'+name.camelize();
			try {
				if(Validation.isVisible(elm) && !v.test($F(elm), elm)) {
					if(!elm[prop]) {
						var advice = Validation.getAdvice(name, elm);
						if(advice == null) {
							var errorMsg = useTitle ? ((elm && elm.title) ? elm.title : v.error) : v.error;
							advice = '<br><span class="validation-advice" id="advice-' + name + '-' + Validation.getElmID(elm) +'" style="display:none;">' + errorMsg + '</span>'
							switch (elm.type.toLowerCase()) {
								case 'checkbox':
								case 'radio':
									var p = elm.parentNode;
									if(p) {
										new Insertion.Bottom(p, advice);
									} else {
										new Insertion.After(elm, advice);
									}
									break;
								default:
									new Insertion.After(elm, advice);
							}
						}
					}
					var advice = Validation.getAdvice(name, elm);
					if (Validation.runtime.advice) {
						if (document.all) {
							advice.show();
						} else {
							advice.style.display = 'inline';
							advice.style.display = 'table-cell';

						}
					} else {
						advice.hide();
					}

					elm[prop] = true;
					if (elm.type == 'text'){
						elm.removeClassName('validation-passed');
						elm.addClassName('validation-failed');
					}
					return false;
				} else {
					var advice = Validation.getAdvice(name, elm);
					if(advice != null) advice.hide();
					elm[prop] = '';
					if (elm.type == 'text'){
						elm.removeClassName('validation-failed');
						elm.addClassName('validation-passed');
					}
					return true;
				}
			} catch(e) {
				throw(e)
			}
		},
		isVisible : function(elm) {
			while(elm.tagName != 'BODY') {
				if(!$(elm).visible()) return false;
				elm = elm.parentNode;
			}
			return true;
		},
		getAdvice : function(name, elm) {
			return $('advice-' + name + '-' + Validation.getElmID(elm)) || $('advice-' + Validation.getElmID(elm));
		},
		getElmID : function(elm) {
			return elm.id ? elm.id : elm.name;
		},
		reset : function(elm) {
			elm = $(elm);
			var cn = elm.classNames();
			cn.each(function(value) {
				var prop = '__advice'+value.camelize();
				if(elm[prop]) {
					var advice = Validation.getAdvice(value, elm);
					advice.hide();
					elm[prop] = '';
				}
				if (elm.type == 'text'){
					elm.removeClassName('validation-failed');
					elm.removeClassName('validation-passed');
				}
			});
		},
		add : function(className, error, test, options) {
			var nv = {};
			nv[className] = new Validator(className, error, test, options);
			Object.extend(Validation.methods, nv);
		},
		addAllThese : function(validators) {
			var nv = {};
			$A(validators).each(function(value) {
					nv[value[0]] = new Validator(value[0], value[1], value[2], (value.length > 3 ? value[3] : {}));
				});
			Object.extend(Validation.methods, nv);
		},
		get : function(name) {
			return  Validation.methods[name] ? Validation.methods[name] : Validation.methods['_LikeNoIDIEverSaw_'];
		},
		methods : {
			'_LikeNoIDIEverSaw_' : new Validator('_LikeNoIDIEverSaw_','',{})
		}
}
);
Validation.add('IsEmpty', '',
	function(v) {
		return  ((v == null) || (v.length == 0) || v.match(/^\s+$/)); // || /^\s+$/.test(v));
	}
);
Validation.addAllThese([
	['required', __('This is a required field.'), function(v) {
				return !Validation.get('IsEmpty').test(v);
			}],
	['validate-number', __('Please enter a valid number in this field.'), function(v) {
				return Validation.get('IsEmpty').test(v) || (!isNaN(v) && !/^\s+$/.test(v));
			}],
	['validate-digits', __('Please use numbers only in this field. please avoid spaces or other characters such as dots or commas.'), function(v) {
				return Validation.get('IsEmpty').test(v) ||  !/[^\d]/.test(v);
			}],
	['validate-alpha', __('Please use letters only (a-z) in this field.'), function (v) {
				return Validation.get('IsEmpty').test(v) ||  /^[a-zA-Z]+$/.test(v)
			}],
	['validate-alphanum', __('Please use only letters (a-z) or numbers (0-9) only in this field. No spaces or other characters are allowed.'), function(v) {
				return Validation.get('IsEmpty').test(v) ||  !/\W/.test(v)
			}],
	['validate-date', __('Please enter a valid date (yyyy-mm-dd).'), function(v) {
				return Validation.get('IsEmpty').test(v) ||  /^(19|20)[0-9]{2}-([1-9]|0[1-9]|1[012])-([1-9]|0[1-9]|[12][0-9]|3[01])+$/.test(v);
			}],
	['validate-email', __('Please enter a valid email address. For example [e-mail] .'), function (v) {
				return Validation.get('IsEmpty').test(v) || /\w{1,}[@][\w\-]{1,}([.]([\w\-]{1,})){1,3}$/.test(v)
			}],
	['validate-url', __('Please enter a valid URL.'), function (v) {
				return Validation.get('IsEmpty').test(v) || /^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*)(:(\d+))?\/?/i.test(v)
			}],
	['validate-date-au', __('Please use this date format: dd/mm/yyyy. For example 17/03/2006 for the 17th of March, 2006.'), function(v) {
				if(Validation.get('IsEmpty').test(v)) return true;
				var regex = /^(\d{2})\/(\d{2})\/(\d{4})$/;
				if(!regex.test(v)) return false;
				var d = new Date(v.replace(regex, '$2/$1/$3'));
				return ( parseInt(RegExp.$2, 10) == (1+d.getMonth()) ) && 
							(parseInt(RegExp.$1, 10) == d.getDate()) && 
							(parseInt(RegExp.$3, 10) == d.getFullYear() );
			}],
	['validate-currency-dollar', __('Please enter a valid $ amount. For example $100.00 .'), function(v) {
				// [$]1[##][,###]+[.##]
				// [$]1###+[.##]
				// [$]0.##
				// [$].##
				return Validation.get('IsEmpty').test(v) ||  /^\$?\-?([1-9]{1}[0-9]{0,2}(\,[0-9]{3})*(\.[0-9]{0,2})?|[1-9]{1}\d*(\.[0-9]{0,2})?|0(\.[0-9]{0,2})?|(\.[0-9]{1,2})?)$/.test(v)
			}],
	['validate-selection', __('Please make a selection'), function(v,elm){
				return elm.options ? elm.selectedIndex > 0 : !Validation.get('IsEmpty').test(v);
			}],
	['validate-passwordag', __('Same password'), function(v,elm){
				if (elm.name.search(/\[0\]/) == -1) {
					return (v==elm.previousSibling.previousSibling.value);
				} else if (elm.name.search(/\[1\]/) == -1 && elm.nextSibling.nextSibling.value) {
					return (v==elm.nextSibling.nextSibling.value);
				} else {
					return true;
				}
			}],
	['validate-one-required', __('Please select one of the above options.'), function (v,elm) {
				var p = elm.parentNode;
				var options = p.getElementsByTagName('INPUT');
				return $A(options).any(function(elm) {
					return $F(elm);
				});
			}]
]);