silverstripe-framework/forms/Validator.php
Sam Minnee c0e2017cfc BUGFIX Validator/RequiredFields should not regard "0" as an empty value (from r108512)
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@112756 467b73ca-7a2a-4603-9d3b-597d59a354a9
2010-10-19 00:43:38 +00:00

260 lines
7.5 KiB
PHP
Executable File

<?php
/**
* This validation class handles all form and custom form validation through
* the use of Required fields.
*
* Relies on javascript for client-side validation, and marking fields after serverside validation.
*
* Acts as a visitor to individual form fields.
*
* @todo Automatically mark fields after serverside validation and replace the form through
* FormResponse if the request was made by ajax.
*
* @package forms
* @subpackage validators
*/
abstract class Validator extends Object {
/**
* @var Form $form
*/
protected $form;
/**
* @var array $errors
*/
protected $errors;
/**
* Static for default value of $this->javascriptValidationHandler.
* Set with Validator::set_javascript_validation_handler();
* @var string
*/
protected static $javascript_validation_handler = "prototype";
/**
* Handler for javascript validation. Can be "prototype" or "none".
* @var string
*/
protected $javascriptValidationHandler = null;
/**
* Call this function to set the javascript validation handler for all valdiation on your site.
* This could be called from _config.php to set site-wide javascript validation, or from ContentController::init()
* to affect only the front-end site.
* Use instance method {@link setJavascriptValidationHandler()} to
* only set handler for a specific form instance.
*
* @param $handler A string representing the handler to use: 'prototype' or 'none'.
* @todo Add 'jquery' as a handler option.
*/
public static function set_javascript_validation_handler($handler) {
if($handler == 'prototype' || $handler == 'none') {
self::$javascript_validation_handler = $handler;
} else {
user_error("Validator::setJavascriptValidationHandler() passed bad handler '$handler'", E_USER_WARNING);
}
}
/**
* Returns global validation handler used for all forms by default,
* unless overwritten by {@link setJavascriptValidationHandler()}.
*
* @return string
*/
public static function get_javascript_validator_handler() {
return self::$javascript_validation_handler;
}
/**
* Set JavaScript validation for this validator.
* Use static method {@link set_javascript_validation_handler()}
* to set handlers globally.
*
* @param string $handler
*/
public function setJavascriptValidationHandler($handler) {
if($handler == 'prototype' || $handler == 'none') {
$this->javascriptValidationHandler = $handler;
} else {
user_error("Validator::setJavascriptValidationHandler() passed bad handler '$handler'", E_USER_WARNING);
}
}
/**
* Gets the current javascript validation handler for this form.
* If not set, falls back to the global static {@link self::$javascript_validation_handler}.
*
* @return string
*/
public function getJavascriptValidationHandler() {
return ($this->javascriptValidationHandler) ? $this->javascriptValidationHandler : self::$javascript_validation_handler;
}
/**
* @param Form $form
*/
function setForm($form) {
$this->form = $form;
}
/**
* @return array Errors (if any)
*/
function validate(){
$this->errors = null;
$this->php($this->form->getData());
return $this->errors;
}
/**
* Callback to register an error on a field (Called from implementations of {@link FormField::validate})
*
* @param $fieldName name of the field
* @param $message error message to display
* @param $messageType optional parameter, gets loaded into the HTML class attribute in the rendered output. See {@link getErrors()} for details.
*/
function validationError($fieldName, $message, $messageType='') {
$this->errors[] = array(
'fieldName' => $fieldName,
'message' => $message,
'messageType' => $messageType,
);
}
/**
* @deprecated 2.4 Use Validator->getErrors() and custom code
*/
function showError() {
Debug::show($this->errors);
}
/**
* @deprecated 2.4 Use custom code
*/
function getCombinedError(){
if($this->errors) {
foreach($this->errors as $error){
$ret['message'] .= $error['message']."<br />";
$ret['messageType'] .= $error['messageType']."<br />";
}
return $ret;
}
}
/**
* @deprecated 2.4 Use getErrors()
*/
function getError(){
return $this->getErrors();
}
/**
* Returns all errors found by a previous call to {@link validate()}.
* The array contains the following keys for each error:
* - 'fieldName': the name of the FormField instance
* - 'message': Validation message (optionally localized)
* - 'messageType': Arbitrary type of the message which is rendered as a CSS class in the FormField template,
* e.g. <span class="message (type)">. Usually "bad|message|validation|required", which renders differently
* if sapphire/css/Form.css is included.
*
* @return array
*/
function getErrors() {
return $this->errors;
}
function requireField($fieldName, $data) {
if(!strlen($data[$fieldName])) $this->validationError($fieldName, "$fieldName is required.", "required");
}
function includeJavascriptValidation() {
if($this->getJavascriptValidationHandler() == 'prototype') {
Requirements::javascript(SAPPHIRE_DIR . "/thirdparty/prototype/prototype.js");
Requirements::javascript(SAPPHIRE_DIR . "/thirdparty/behaviour/behaviour.js");
Requirements::javascript(SAPPHIRE_DIR . "/javascript/prototype_improvements.js");
Requirements::add_i18n_javascript(SAPPHIRE_DIR . '/javascript/lang');
Requirements::javascript(SAPPHIRE_DIR . "/javascript/Validator.js");
$code = $this->javascript();
$formID = $this->form->FormName();
$js = <<<JS
Behaviour.register({
'#$formID': {
validate : function(fromAnOnBlur) {
initialiseForm(this, fromAnOnBlur);
$code
var error = hasHadFormError();
if(!error && fromAnOnBlur) clearErrorMessage(fromAnOnBlur);
if(error && !fromAnOnBlur) focusOnFirstErroredField();
return !error;
},
onsubmit : function() {
if(typeof this.bypassValidation == 'undefined' || !this.bypassValidation) return this.validate();
}
},
'#$formID input' : {
initialise: function() {
if(!this.old_onblur) this.old_onblur = function() { return true; }
if(!this.old_onfocus) this.old_onfocus = function() { return true; }
},
onblur : function() {
if(this.old_onblur()) {
// Don't perform instant validation for CalendarDateField fields; it creates usability wierdness.
if(this.parentNode.className.indexOf('calendardate') == -1 || this.value) {
return $('$formID').validate(this);
} else {
return true;
}
}
}
},
'#$formID textarea' : {
initialise: function() {
if(!this.old_onblur) this.old_onblur = function() { return true; }
if(!this.old_onfocus) this.old_onfocus = function() { return true; }
},
onblur : function() {
if(this.old_onblur()) {
return $('$formID').validate(this);
}
}
},
'#$formID select' : {
initialise: function() {
if(!this.old_onblur) this.old_onblur = function() { return true; }
},
onblur : function() {
if(this.old_onblur()) {
return $('$formID').validate(this);
}
}
}
});
JS;
Requirements::customScript($js);
// HACK Notify the form that the validators client-side validation code has already been included
if($this->form) $this->form->jsValidationIncluded = true;
}
}
/**
* Returns true if the named field is "required".
* Used by FormField to return a value for FormField::Required(), to do things like show *s on the form template.
* By default, it always returns false.
*/
function fieldIsRequired($fieldName) {
return false;
}
abstract function javascript();
abstract function php($data);
}
?>