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form.js
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/*!
* # Semantic UI - Form Validation
* http://github.com/semantic-org/semantic-ui/
*
*
* Released under the MIT license
* http://opensource.org/licenses/MIT
*
*/
;(function ($, window, document, undefined) {
'use strict';
window = (typeof window != 'undefined' && window.Math == Math)
? window
: (typeof self != 'undefined' && self.Math == Math)
? self
: Function('return this')()
;
$.fn.form = function(parameters) {
var
$allModules = $(this),
moduleSelector = $allModules.selector || '',
time = new Date().getTime(),
performance = [],
query = arguments[0],
legacyParameters = arguments[1],
methodInvoked = (typeof query == 'string'),
queryArguments = [].slice.call(arguments, 1),
returnedValue
;
$allModules
.each(function() {
var
$module = $(this),
element = this,
formErrors = [],
keyHeldDown = false,
// set at run-time
$field,
$group,
$message,
$prompt,
$submit,
$clear,
$reset,
settings,
validation,
metadata,
selector,
className,
regExp,
error,
namespace,
moduleNamespace,
eventNamespace,
instance,
module
;
module = {
initialize: function() {
// settings grabbed at run time
module.get.settings();
if(methodInvoked) {
if(instance === undefined) {
module.instantiate();
}
module.invoke(query);
}
else {
if(instance !== undefined) {
instance.invoke('destroy');
}
module.verbose('Initializing form validation', $module, settings);
module.bindEvents();
module.set.defaults();
module.instantiate();
}
},
instantiate: function() {
module.verbose('Storing instance of module', module);
instance = module;
$module
.data(moduleNamespace, module)
;
},
destroy: function() {
module.verbose('Destroying previous module', instance);
module.removeEvents();
$module
.removeData(moduleNamespace)
;
},
refresh: function() {
module.verbose('Refreshing selector cache');
$field = $module.find(selector.field);
$group = $module.find(selector.group);
$message = $module.find(selector.message);
$prompt = $module.find(selector.prompt);
$submit = $module.find(selector.submit);
$clear = $module.find(selector.clear);
$reset = $module.find(selector.reset);
},
submit: function() {
module.verbose('Submitting form', $module);
$module
.submit()
;
},
attachEvents: function(selector, action) {
action = action || 'submit';
$(selector)
.on('click' + eventNamespace, function(event) {
module[action]();
event.preventDefault();
})
;
},
bindEvents: function() {
module.verbose('Attaching form events');
$module
.on('submit' + eventNamespace, module.validate.form)
.on('blur' + eventNamespace, selector.field, module.event.field.blur)
.on('click' + eventNamespace, selector.submit, module.submit)
.on('click' + eventNamespace, selector.reset, module.reset)
.on('click' + eventNamespace, selector.clear, module.clear)
;
if(settings.keyboardShortcuts) {
$module
.on('keydown' + eventNamespace, selector.field, module.event.field.keydown)
;
}
$field
.each(function() {
var
$input = $(this),
type = $input.prop('type'),
inputEvent = module.get.changeEvent(type, $input)
;
$(this)
.on(inputEvent + eventNamespace, module.event.field.change)
;
})
;
},
clear: function() {
$field
.each(function () {
var
$field = $(this),
$element = $field.parent(),
$fieldGroup = $field.closest($group),
$prompt = $fieldGroup.find(selector.prompt),
defaultValue = $field.data(metadata.defaultValue) || '',
isCheckbox = $element.is(selector.uiCheckbox),
isDropdown = $element.is(selector.uiDropdown),
isErrored = $fieldGroup.hasClass(className.error)
;
if(isErrored) {
module.verbose('Resetting error on field', $fieldGroup);
$fieldGroup.removeClass(className.error);
$prompt.remove();
}
if(isDropdown) {
module.verbose('Resetting dropdown value', $element, defaultValue);
$element.dropdown('clear');
}
else if(isCheckbox) {
$field.prop('checked', false);
}
else {
module.verbose('Resetting field value', $field, defaultValue);
$field.val('');
}
})
;
},
reset: function() {
$field
.each(function () {
var
$field = $(this),
$element = $field.parent(),
$fieldGroup = $field.closest($group),
$prompt = $fieldGroup.find(selector.prompt),
defaultValue = $field.data(metadata.defaultValue),
isCheckbox = $element.is(selector.uiCheckbox),
isDropdown = $element.is(selector.uiDropdown),
isErrored = $fieldGroup.hasClass(className.error)
;
if(defaultValue === undefined) {
return;
}
if(isErrored) {
module.verbose('Resetting error on field', $fieldGroup);
$fieldGroup.removeClass(className.error);
$prompt.remove();
}
if(isDropdown) {
module.verbose('Resetting dropdown value', $element, defaultValue);
$element.dropdown('restore defaults');
}
else if(isCheckbox) {
module.verbose('Resetting checkbox value', $element, defaultValue);
$field.prop('checked', defaultValue);
}
else {
module.verbose('Resetting field value', $field, defaultValue);
$field.val(defaultValue);
}
})
;
},
determine: {
isValid: function() {
var
allValid = true
;
$.each(validation, function(fieldName, field) {
if( !( module.validate.field(field, fieldName, true) ) ) {
allValid = false;
}
});
return allValid;
}
},
is: {
bracketedRule: function(rule) {
return (rule.type && rule.type.match(settings.regExp.bracket));
},
shorthandFields: function(fields) {
var
fieldKeys = Object.keys(fields),
firstRule = fields[fieldKeys[0]]
;
return module.is.shorthandRules(firstRule);
},
// duck type rule test
shorthandRules: function(rules) {
return (typeof rules == 'string' || $.isArray(rules));
},
empty: function($field) {
if(!$field || $field.length === 0) {
return true;
}
else if($field.is('input[type="checkbox"]')) {
return !$field.is(':checked');
}
else {
return module.is.blank($field);
}
},
blank: function($field) {
return $.trim($field.val()) === '';
},
valid: function(field) {
var
allValid = true
;
if(field) {
module.verbose('Checking if field is valid', field);
return module.validate.field(validation[field], field, false);
}
else {
module.verbose('Checking if form is valid');
$.each(validation, function(fieldName, field) {
if( !module.is.valid(fieldName) ) {
allValid = false;
}
});
return allValid;
}
}
},
removeEvents: function() {
$module
.off(eventNamespace)
;
$field
.off(eventNamespace)
;
$submit
.off(eventNamespace)
;
$field
.off(eventNamespace)
;
},
event: {
field: {
keydown: function(event) {
var
$field = $(this),
key = event.which,
isInput = $field.is(selector.input),
isCheckbox = $field.is(selector.checkbox),
isInDropdown = ($field.closest(selector.uiDropdown).length > 0),
keyCode = {
enter : 13,
escape : 27
}
;
if( key == keyCode.escape) {
module.verbose('Escape key pressed blurring field');
$field
.blur()
;
}
if(!event.ctrlKey && key == keyCode.enter && isInput && !isInDropdown && !isCheckbox) {
if(!keyHeldDown) {
$field
.one('keyup' + eventNamespace, module.event.field.keyup)
;
module.submit();
module.debug('Enter pressed on input submitting form');
}
keyHeldDown = true;
}
},
keyup: function() {
keyHeldDown = false;
},
blur: function(event) {
var
$field = $(this),
$fieldGroup = $field.closest($group),
validationRules = module.get.validation($field)
;
if( $fieldGroup.hasClass(className.error) ) {
module.debug('Revalidating field', $field, validationRules);
if(validationRules) {
module.validate.field( validationRules );
}
}
else if(settings.on == 'blur') {
if(validationRules) {
module.validate.field( validationRules );
}
}
},
change: function(event) {
var
$field = $(this),
$fieldGroup = $field.closest($group),
validationRules = module.get.validation($field)
;
if(validationRules && (settings.on == 'change' || ( $fieldGroup.hasClass(className.error) && settings.revalidate) )) {
clearTimeout(module.timer);
module.timer = setTimeout(function() {
module.debug('Revalidating field', $field, module.get.validation($field));
module.validate.field( validationRules );
}, settings.delay);
}
}
}
},
get: {
ancillaryValue: function(rule) {
if(!rule.type || (!rule.value && !module.is.bracketedRule(rule))) {
return false;
}
return (rule.value !== undefined)
? rule.value
: rule.type.match(settings.regExp.bracket)[1] + ''
;
},
ruleName: function(rule) {
if( module.is.bracketedRule(rule) ) {
return rule.type.replace(rule.type.match(settings.regExp.bracket)[0], '');
}
return rule.type;
},
changeEvent: function(type, $input) {
if(type == 'checkbox' || type == 'radio' || type == 'hidden' || $input.is('select')) {
return 'change';
}
else {
return module.get.inputEvent();
}
},
inputEvent: function() {
return (document.createElement('input').oninput !== undefined)
? 'input'
: (document.createElement('input').onpropertychange !== undefined)
? 'propertychange'
: 'keyup'
;
},
fieldsFromShorthand: function(fields) {
var
fullFields = {}
;
$.each(fields, function(name, rules) {
if(typeof rules == 'string') {
rules = [rules];
}
fullFields[name] = {
rules: []
};
$.each(rules, function(index, rule) {
fullFields[name].rules.push({ type: rule });
});
});
return fullFields;
},
prompt: function(rule, field) {
var
ruleName = module.get.ruleName(rule),
ancillary = module.get.ancillaryValue(rule),
$field = module.get.field(field.identifier),
value = $field.val(),
prompt = $.isFunction(rule.prompt)
? rule.prompt(value)
: rule.prompt || settings.prompt[ruleName] || settings.text.unspecifiedRule,
requiresValue = (prompt.search('{value}') !== -1),
requiresName = (prompt.search('{name}') !== -1),
$label,
name
;
if(requiresValue) {
prompt = prompt.replace('{value}', $field.val());
}
if(requiresName) {
$label = $field.closest(selector.group).find('label').eq(0);
name = ($label.length == 1)
? $label.text()
: $field.prop('placeholder') || settings.text.unspecifiedField
;
prompt = prompt.replace('{name}', name);
}
prompt = prompt.replace('{identifier}', field.identifier);
prompt = prompt.replace('{ruleValue}', ancillary);
if(!rule.prompt) {
module.verbose('Using default validation prompt for type', prompt, ruleName);
}
return prompt;
},
settings: function() {
if($.isPlainObject(parameters)) {
var
keys = Object.keys(parameters),
isLegacySettings = (keys.length > 0)
? (parameters[keys[0]].identifier !== undefined && parameters[keys[0]].rules !== undefined)
: false,
ruleKeys
;
if(isLegacySettings) {
// 1.x (ducktyped)
settings = $.extend(true, {}, $.fn.form.settings, legacyParameters);
validation = $.extend({}, $.fn.form.settings.defaults, parameters);
module.error(settings.error.oldSyntax, element);
module.verbose('Extending settings from legacy parameters', validation, settings);
}
else {
// 2.x
if(parameters.fields && module.is.shorthandFields(parameters.fields)) {
parameters.fields = module.get.fieldsFromShorthand(parameters.fields);
}
settings = $.extend(true, {}, $.fn.form.settings, parameters);
validation = $.extend({}, $.fn.form.settings.defaults, settings.fields);
module.verbose('Extending settings', validation, settings);
}
}
else {
settings = $.fn.form.settings;
validation = $.fn.form.settings.defaults;
module.verbose('Using default form validation', validation, settings);
}
// shorthand
namespace = settings.namespace;
metadata = settings.metadata;
selector = settings.selector;
className = settings.className;
regExp = settings.regExp;
error = settings.error;
moduleNamespace = 'module-' + namespace;
eventNamespace = '.' + namespace;
// grab instance
instance = $module.data(moduleNamespace);
// refresh selector cache
module.refresh();
},
field: function(identifier) {
module.verbose('Finding field with identifier', identifier);
identifier = module.escape.string(identifier);
if($field.filter('#' + identifier).length > 0 ) {
return $field.filter('#' + identifier);
}
else if( $field.filter('[name="' + identifier +'"]').length > 0 ) {
return $field.filter('[name="' + identifier +'"]');
}
else if( $field.filter('[name="' + identifier +'[]"]').length > 0 ) {
return $field.filter('[name="' + identifier +'[]"]');
}
else if( $field.filter('[data-' + metadata.validate + '="'+ identifier +'"]').length > 0 ) {
return $field.filter('[data-' + metadata.validate + '="'+ identifier +'"]');
}
return $('<input/>');
},
fields: function(fields) {
var
$fields = $()
;
$.each(fields, function(index, name) {
$fields = $fields.add( module.get.field(name) );
});
return $fields;
},
validation: function($field) {
var
fieldValidation,
identifier
;
if(!validation) {
return false;
}
$.each(validation, function(fieldName, field) {
identifier = field.identifier || fieldName;
if( module.get.field(identifier)[0] == $field[0] ) {
field.identifier = identifier;
fieldValidation = field;
}
});
return fieldValidation || false;
},
value: function (field) {
var
fields = [],
results
;
fields.push(field);
results = module.get.values.call(element, fields);
return results[field];
},
values: function (fields) {
var
$fields = $.isArray(fields)
? module.get.fields(fields)
: $field,
values = {}
;
$fields.each(function(index, field) {
var
$field = $(field),
type = $field.prop('type'),
name = $field.prop('name'),
value = $field.val(),
isCheckbox = $field.is(selector.checkbox),
isRadio = $field.is(selector.radio),
isMultiple = (name.indexOf('[]') !== -1),
isChecked = (isCheckbox)
? $field.is(':checked')
: false
;
if(name) {
if(isMultiple) {
name = name.replace('[]', '');
if(!values[name]) {
values[name] = [];
}
if(isCheckbox) {
if(isChecked) {
values[name].push(value || true);
}
else {
values[name].push(false);
}
}
else {
values[name].push(value);
}
}
else {
if(isRadio) {
if(values[name] === undefined || values[name] == false) {
values[name] = (isChecked)
? value || true
: false
;
}
}
else if(isCheckbox) {
if(isChecked) {
values[name] = value || true;
}
else {
values[name] = false;
}
}
else {
values[name] = value;
}
}
}
});
return values;
}
},
has: {
field: function(identifier) {
module.verbose('Checking for existence of a field with identifier', identifier);
identifier = module.escape.string(identifier);
if(typeof identifier !== 'string') {
module.error(error.identifier, identifier);
}
if($field.filter('#' + identifier).length > 0 ) {
return true;
}
else if( $field.filter('[name="' + identifier +'"]').length > 0 ) {
return true;
}
else if( $field.filter('[data-' + metadata.validate + '="'+ identifier +'"]').length > 0 ) {
return true;
}
return false;
}
},
escape: {
string: function(text) {
text = String(text);
return text.replace(regExp.escape, '\\$&');
}
},
add: {
// alias
rule: function(name, rules) {
module.add.field(name, rules);
},
field: function(name, rules) {
var
newValidation = {}
;
if(module.is.shorthandRules(rules)) {
rules = $.isArray(rules)
? rules
: [rules]
;
newValidation[name] = {
rules: []
};
$.each(rules, function(index, rule) {
newValidation[name].rules.push({ type: rule });
});
}
else {
newValidation[name] = rules;
}
validation = $.extend({}, validation, newValidation);
module.debug('Adding rules', newValidation, validation);
},
fields: function(fields) {
var
newValidation
;
if(fields && module.is.shorthandFields(fields)) {
newValidation = module.get.fieldsFromShorthand(fields);
}
else {
newValidation = fields;
}
validation = $.extend({}, validation, newValidation);
},
prompt: function(identifier, errors) {
var
$field = module.get.field(identifier),
$fieldGroup = $field.closest($group),
$prompt = $fieldGroup.children(selector.prompt),
promptExists = ($prompt.length !== 0)
;
errors = (typeof errors == 'string')
? [errors]
: errors
;
module.verbose('Adding field error state', identifier);
$fieldGroup
.addClass(className.error)
;
if(settings.inline) {
if(!promptExists) {
$prompt = settings.templates.prompt(errors);
$prompt
.appendTo($fieldGroup)
;
}
$prompt
.html(errors[0])
;
if(!promptExists) {
if(settings.transition && $.fn.transition !== undefined && $module.transition('is supported')) {
module.verbose('Displaying error with css transition', settings.transition);
$prompt.transition(settings.transition + ' in', settings.duration);
}
else {
module.verbose('Displaying error with fallback javascript animation');
$prompt
.fadeIn(settings.duration)
;
}
}
else {
module.verbose('Inline errors are disabled, no inline error added', identifier);
}
}
},
errors: function(errors) {
module.debug('Adding form error messages', errors);
module.set.error();
$message
.html( settings.templates.error(errors) )
;
}
},
remove: {
rule: function(field, rule) {
var
rules = $.isArray(rule)
? rule
: [rule]
;
if(rule == undefined) {
module.debug('Removed all rules');
validation[field].rules = [];
return;
}
if(validation[field] == undefined || !$.isArray(validation[field].rules)) {
return;
}
$.each(validation[field].rules, function(index, rule) {
if(rules.indexOf(rule.type) !== -1) {
module.debug('Removed rule', rule.type);
validation[field].rules.splice(index, 1);
}
});
},
field: function(field) {
var
fields = $.isArray(field)
? field
: [field]
;
$.each(fields, function(index, field) {
module.remove.rule(field);
});
},
// alias
rules: function(field, rules) {
if($.isArray(field)) {
$.each(fields, function(index, field) {
module.remove.rule(field, rules);
});
}
else {
module.remove.rule(field, rules);
}
},
fields: function(fields) {
module.remove.field(fields);
},
prompt: function(identifier) {
var
$field = module.get.field(identifier),
$fieldGroup = $field.closest($group),
$prompt = $fieldGroup.children(selector.prompt)
;
$fieldGroup
.removeClass(className.error)
;
if(settings.inline && $prompt.is(':visible')) {
module.verbose('Removing prompt for field', identifier);
if(settings.transition && $.fn.transition !== undefined && $module.transition('is supported')) {
$prompt.transition(settings.transition + ' out', settings.duration, function() {
$prompt.remove();
});
}
else {
$prompt
.fadeOut(settings.duration, function(){
$prompt.remove();
})
;
}
}
}
},
set: {
success: function() {
$module
.removeClass(className.error)
.addClass(className.success)
;
},
defaults: function () {
$field
.each(function () {
var
$field = $(this),
isCheckbox = ($field.filter(selector.checkbox).length > 0),
value = (isCheckbox)
? $field.is(':checked')
: $field.val()
;
$field.data(metadata.defaultValue, value);
})
;
},
error: function() {
$module
.removeClass(className.success)
.addClass(className.error)
;
},
value: function (field, value) {
var
fields = {}
;
fields[field] = value;
return module.set.values.call(element, fields);
},
values: function (fields) {
if($.isEmptyObject(fields)) {
return;
}
$.each(fields, function(key, value) {
var
$field = module.get.field(key),
$element = $field.parent(),
isMultiple = $.isArray(value),
isCheckbox = $element.is(selector.uiCheckbox),
isDropdown = $element.is(selector.uiDropdown),
isRadio = ($field.is(selector.radio) && isCheckbox),
fieldExists = ($field.length > 0),
$multipleField
;
if(fieldExists) {
if(isMultiple && isCheckbox) {
module.verbose('Selecting multiple', value, $field);
$element.checkbox('uncheck');
$.each(value, function(index, value) {
$multipleField = $field.filter('[value="' + value + '"]');
$element = $multipleField.parent();
if($multipleField.length > 0) {
$element.checkbox('check');
}
});
}
else if(isRadio) {
module.verbose('Selecting radio value', value, $field);
$field.filter('[value="' + value + '"]')
.parent(selector.uiCheckbox)
.checkbox('check')
;
}
else if(isCheckbox) {
module.verbose('Setting checkbox value', value, $element);
if(value === true) {
$element.checkbox('check');
}
else {
$element.checkbox('uncheck');
}
}
else if(isDropdown) {
module.verbose('Setting dropdown value', value, $element);
$element.dropdown('set selected', value);
}
else {
module.verbose('Setting field value', value, $field);
$field.val(value);
}
}
});
}
},
validate: {
form: function(event, ignoreCallbacks) {
var
values = module.get.values(),
apiRequest
;
// input keydown event will fire submit repeatedly by browser default
if(keyHeldDown) {
return false;
}
// reset errors
formErrors = [];
if( module.determine.isValid() ) {
module.debug('Form has no validation errors, submitting');
module.set.success();
if(ignoreCallbacks !== true) {
return settings.onSuccess.call(element, event, values);
}
}
else {
module.debug('Form has errors');
module.set.error();
if(!settings.inline) {
module.add.errors(formErrors);
}
// prevent ajax submit
if($module.data('moduleApi') !== undefined) {
event.stopImmediatePropagation();
}
if(ignoreCallbacks !== true) {
return settings.onFailure.call(element, formErrors, values);
}
}
},
// takes a validation object and returns whether field passes validation
field: function(field, fieldName, showErrors) {
showErrors = (showErrors !== undefined)
? showErrors
: true
;
if(typeof field == 'string') {
module.verbose('Validating field', field);
fieldName = field;
field = validation[field];
}
var
identifier = field.identifier || fieldName,
$field = module.get.field(identifier),
$dependsField = (field.depends)
? module.get.field(field.depends)
: false,
fieldValid = true,
fieldErrors = []
;
if(!field.identifier) {
module.debug('Using field name as identifier', identifier);
field.identifier = identifier;
}
if($field.prop('disabled')) {
module.debug('Field is disabled. Skipping', identifier);
fieldValid = true;
}
else if(field.optional && module.is.blank($field)){
module.debug('Field is optional and blank. Skipping', identifier);
fieldValid = true;
}
else if(field.depends && module.is.empty($dependsField)) {
module.debug('Field depends on another value that is not present or empty. Skipping', $dependsField);
fieldValid = true;
}
else if(field.rules !== undefined) {
$.each(field.rules, function(index, rule) {
if( module.has.field(identifier) && !( module.validate.rule(field, rule) ) ) {
module.debug('Field is invalid', identifier, rule.type);
fieldErrors.push(module.get.prompt(rule, field));
fieldValid = false;
}
});
}
if(fieldValid) {
if(showErrors) {
module.remove.prompt(identifier, fieldErrors);
settings.onValid.call($field);
}