silverstripe-framework/forms/Form.php
Ingo Schommer 0bae1826bb FIX Opt-out pf form message escaping (fixes #2796)
This fixes a limitation introduced through http://www.silverstripe.org/ss-2013-008-xss-in-numericfield-validation/.
Form messages used to accept HTML, now they’re escaped by default, effectively removing the ability
to pass in HTML and take care of escaping manually.

We pass through HTML to message in core through the CTF system, so this needs to be fixed.
It’s an alternative fix to https://github.com/silverstripe/silverstripe-framework/pull/2803.
2014-08-22 09:08:55 +12:00

1377 lines
41 KiB
PHP
Executable File

<?php
/**
* Base class for all forms.
* The form class is an extensible base for all forms on a sapphire application. It can be used
* either by extending it, and creating processor methods on the subclass, or by creating instances
* of form whose actions are handled by the parent controller.
*
* In either case, if you want to get a form to do anything, it must be inextricably tied to a
* controller. The constructor is passed a controller and a method on that controller. This method
* should return the form object, and it shouldn't require any arguments. Parameters, if necessary,
* can be passed using the URL or get variables. These restrictions are in place so that we can
* recreate the form object upon form submission, without the use of a session, which would be too
* resource-intensive.
*
* You will need to create at least one method for processing the submission (through {@link FormAction}).
* This method will be passed two parameters: the raw request data, and the form object.
* Usually you want to save data into a {@link DataObject} by using {@link saveInto()}.
* If you want to process the submitted data in any way, please use {@link getData()} rather than
* the raw request data.
*
* <h2>Validation</h2>
* Each form needs some form of {@link Validator} to trigger the {@link FormField->validate()} methods for each field.
* You can't disable validator for security reasons, because crucial behaviour like extension checks for file uploads depend on it.
* The default validator is an instance of {@link RequiredFields}.
* If you want to enforce serverside-validation to be ignored for a specific {@link FormField},
* you need to subclass it.
*
* <h2>URL Handling</h2>
* The form class extends {@link RequestHandler}, which means it can
* be accessed directly through a URL. This can be handy for refreshing
* a form by ajax, or even just displaying a single form field.
* You can find out the base URL for your form by looking at the
* <form action="..."> value. For example, the edit form in the CMS would be located at
* "admin/EditForm". This URL will render the form without its surrounding
* template when called through GET instead of POST.
*
* By appending to this URL, you can render invidual form elements
* through the {@link FormField->FieldHolder()} method.
* For example, the "URLSegment" field in a standard CMS form would be
* accessible through "admin/EditForm/field/URLSegment/FieldHolder".
*
* @package forms
* @subpackage core
*/
class Form extends RequestHandler {
/**
* @var boolean $includeFormTag Accessed by Form.ss; modified by {@link formHtmlContent()}.
* A performance enhancement over the generate-the-form-tag-and-then-remove-it code that was there previously
*/
public $IncludeFormTag = true;
protected $fields;
protected $actions;
protected $controller;
protected $name;
protected $validator;
protected $formMethod = "post";
protected static $current_action;
/**
* @var Dataobject $record Populated by {@link loadDataFrom()}.
*/
protected $record;
/**
* Keeps track of whether this form has a default action or not.
* Set to false by $this->disableDefaultAction();
*/
protected $hasDefaultAction = true;
/**
* Target attribute of form-tag.
* Useful to open a new window upon
* form submission.
*
* @var string
*/
protected $target;
/**
* Legend value, to be inserted into the
* <legend> element before the <fieldset>
* in Form.ss template.
*
* @var string
*/
protected $legend;
/**
* The SS template to render this form HTML into.
* Default is "Form", but this can be changed to
* another template for customisation.
*
* @see Form->setTemplate()
* @var string
*/
protected $template;
protected $buttonClickedFunc;
protected $message;
protected $messageType;
/**
* Should we redirect the user back down to the
* the form on validation errors rather then just the page
*
* @var bool
*/
protected $redirectToFormOnValidationError = false;
protected $security = true;
/**
* @var SecurityToken
*/
protected $securityToken = null;
/**
* HACK This is a temporary hack to allow multiple calls to includeJavascriptValidation on
* the validator (if one is present).
*
* @var boolean
*/
public $jsValidationIncluded = false;
/**
* @var $extraClasses array Extra CSS-classes for the formfield-container
*/
protected $extraClasses = array();
/**
* Create a new form, with the given fields an action buttons.
*
* @param Controller $controller The parent controller, necessary to create the appropriate form action tag.
* @param String $name The method on the controller that will return this form object.
* @param FieldSet $fields All of the fields in the form - a {@link FieldSet} of {@link FormField} objects.
* @param FieldSet $actions All of the action buttons in the form - a {@link FieldSet} of {@link FormAction} objects
* @param Validator $validator Override the default validator instance (Default: {@link RequiredFields})
*/
function __construct($controller, $name, FieldSet $fields, FieldSet $actions, $validator = null) {
parent::__construct();
if(!$fields instanceof FieldSet) throw new InvalidArgumentException('$fields must be a valid FieldSet instance');
if(!$actions instanceof FieldSet) throw new InvalidArgumentException('$fields must be a valid FieldSet instance');
if($validator && !$validator instanceof Validator) throw new InvalidArgumentException('$validator must be a Valdidator instance');
$fields->setForm($this);
$actions->setForm($this);
$this->fields = $fields;
$this->actions = $actions;
$this->controller = $controller;
$this->name = $name;
if(!$this->controller) user_error("$this->class form created without a controller", E_USER_ERROR);
// Form validation
$this->validator = ($validator) ? $validator : new RequiredFields();
$this->validator->setForm($this);
// Form error controls
$this->setupFormErrors();
// Check if CSRF protection is enabled, either on the parent controller or from the default setting. Note that
// method_exists() is used as some controllers (e.g. GroupTest) do not always extend from Object.
if(method_exists($controller, 'securityTokenEnabled') || (method_exists($controller, 'hasMethod') && $controller->hasMethod('securityTokenEnabled'))) {
$securityEnabled = $controller->securityTokenEnabled();
} else {
$securityEnabled = SecurityToken::is_enabled();
}
$this->securityToken = ($securityEnabled) ? new SecurityToken() : new NullSecurityToken();
}
static $url_handlers = array(
'field/$FieldName!' => 'handleField',
'$Action!' => 'handleAction',
'POST ' => 'httpSubmission',
'GET ' => 'httpSubmission',
);
/**
* Set up current form errors in session to
* the current form if appropriate.
*/
function setupFormErrors() {
$errorInfo = Session::get("FormInfo.{$this->FormName()}");
if(isset($errorInfo['errors']) && is_array($errorInfo['errors'])) {
foreach($errorInfo['errors'] as $error) {
$field = $this->fields->dataFieldByName($error['fieldName']);
if(!$field) {
$errorInfo['message'] = $error['message'];
$errorInfo['type'] = $error['messageType'];
} else {
$field->setError($error['message'], $error['messageType']);
}
}
// load data in from previous submission upon error
if(isset($errorInfo['data'])) $this->loadDataFrom($errorInfo['data']);
}
if(isset($errorInfo['message']) && isset($errorInfo['type'])) {
$this->setMessage($errorInfo['message'], $errorInfo['type']);
}
}
/**
* Handle a form submission. GET and POST requests behave identically.
* Populates the form with {@link loadDataFrom()}, calls {@link validate()},
* and only triggers the requested form action/method
* if the form is valid.
*/
function httpSubmission($request) {
$vars = $request->requestVars();
if(isset($funcName)) {
Form::set_current_action($funcName);
}
// Populate the form
$this->loadDataFrom($vars, true);
// Protection against CSRF attacks
$token = $this->getSecurityToken();
if(!$token->checkRequest($request)) {
$this->httpError(400, "Security token doesn't match, possible CSRF attack.");
}
// Determine the action button clicked
$funcName = null;
foreach($vars as $paramName => $paramVal) {
if(substr($paramName,0,7) == 'action_') {
// Break off querystring arguments included in the action
if(strpos($paramName,'?') !== false) {
list($paramName, $paramVars) = explode('?', $paramName, 2);
$newRequestParams = array();
parse_str($paramVars, $newRequestParams);
$vars = array_merge((array)$vars, (array)$newRequestParams);
}
// Cleanup action_, _x and _y from image fields
$funcName = preg_replace(array('/^action_/','/_x$|_y$/'),'',$paramName);
break;
}
}
// If the action wasnt' set, choose the default on the form.
if(!isset($funcName) && $defaultAction = $this->defaultAction()){
$funcName = $defaultAction->actionName();
}
if(isset($funcName)) {
$this->setButtonClicked($funcName);
}
// Permission checks (first on controller, then falling back to form)
if(
// Ensure that the action is actually a button or method on the form,
// and not just a method on the controller.
$this->controller->hasMethod($funcName)
&& !$this->controller->checkAccessAction($funcName)
// If a button exists, allow it on the controller
&& !$this->Actions()->fieldByName('action_' . $funcName)
) {
return $this->httpError(
403,
sprintf('Action "%s" not allowed on controller (Class: %s)', $funcName, get_class($this->controller))
);
} elseif(
$this->hasMethod($funcName)
&& !$this->checkAccessAction($funcName)
// No checks for button existence or $allowed_actions is performed -
// all form methods are callable (e.g. the legacy "callfieldmethod()")
) {
return $this->httpError(
403,
sprintf('Action "%s" not allowed on form (Name: "%s")', $funcName, $this->Name())
);
}
// Validate the form
if(!$this->validate()) {
if(Director::is_ajax()) {
// Special case for legacy Validator.js implementation (assumes eval'ed javascript collected through FormResponse)
if($this->validator->getJavascriptValidationHandler() == 'prototype') {
return FormResponse::respond();
} else {
$acceptType = $request->getHeader('Accept');
if(strpos($acceptType, 'application/json') !== FALSE) {
// Send validation errors back as JSON with a flag at the start
$response = new SS_HTTPResponse(Convert::array2json($this->validator->getErrors()));
$response->addHeader('Content-Type', 'application/json');
} else {
$this->setupFormErrors();
// Send the newly rendered form tag as HTML
$response = new SS_HTTPResponse($this->forTemplate());
$response->addHeader('Content-Type', 'text/html');
}
return $response;
}
} else {
if($this->getRedirectToFormOnValidationError()) {
if($pageURL = $request->getHeader('Referer')) {
if(Director::is_site_url($pageURL)) {
// Remove existing pragmas
$pageURL = preg_replace('/(#.*)/', '', $pageURL);
return Director::redirect($pageURL . '#' . $this->FormName());
}
}
}
return Director::redirectBack();
}
}
// First, try a handler method on the controller (has been checked for allowed_actions above already)
if($this->controller->hasMethod($funcName)) {
return $this->controller->$funcName($vars, $this, $request);
// Otherwise, try a handler method on the form object.
} elseif($this->hasMethod($funcName)) {
return $this->$funcName($vars, $this, $request);
}
return $this->httpError(404);
}
/**
* Handle a field request.
* Uses {@link Form->dataFieldByName()} to find a matching field,
* and falls back to {@link FieldSet->fieldByName()} to look
* for tabs instead. This means that if you have a tab and a
* formfield with the same name, this method gives priority
* to the formfield.
*
* @param SS_HTTPRequest $request
* @return FormField
*/
function handleField($request) {
$field = $this->dataFieldByName($request->param('FieldName'));
if($field) {
return $field;
} else {
// falling back to fieldByName, e.g. for getting tabs
return $this->Fields()->fieldByName($request->param('FieldName'));
}
}
/**
* Convert this form into a readonly form
*/
function makeReadonly() {
$this->transform(new ReadonlyTransformation());
}
/**
* Set whether the user should be redirected back down to the
* form on the page upon validation errors in the form or if
* they just need to redirect back to the page
*
* @param bool Redirect to the form
*/
public function setRedirectToFormOnValidationError($bool) {
$this->redirectToFormOnValidationError = $bool;
}
/**
* Get whether the user should be redirected back down to the
* form on the page upon validation errors
*
* @return bool
*/
public function getRedirectToFormOnValidationError() {
return $this->redirectToFormOnValidationError;
}
/**
* Add an error message to a field on this form. It will be saved into the session
* and used the next time this form is displayed.
*/
function addErrorMessage($fieldName, $message, $messageType, $escapeHtml = true) {
Session::add_to_array("FormInfo.{$this->FormName()}.errors", array(
'fieldName' => $fieldName,
'message' => $escapeHtml ? Convert::raw2xml($message) : $message,
'messageType' => $messageType,
));
}
function transform(FormTransformation $trans) {
$newFields = new FieldSet();
foreach($this->fields as $field) {
$newFields->push($field->transform($trans));
}
$this->fields = $newFields;
$newActions = new FieldSet();
foreach($this->actions as $action) {
$newActions->push($action->transform($trans));
}
$this->actions = $newActions;
// We have to remove validation, if the fields are not editable ;-)
if($this->validator)
$this->validator->removeValidation();
}
/**
* Get the {@link Validator} attached to this form.
* @return Validator
*/
function getValidator() {
return $this->validator;
}
/**
* Set the {@link Validator} on this form.
*/
function setValidator( Validator $validator ) {
if($validator) {
$this->validator = $validator;
$this->validator->setForm($this);
}
}
/**
* Remove the {@link Validator} from this from.
*/
function unsetValidator(){
$this->validator = null;
}
/**
* Convert this form to another format.
*/
function transformTo(FormTransformation $format) {
$newFields = new FieldSet();
foreach($this->fields as $field) {
$newFields->push($field->transformTo($format));
}
$this->fields = $newFields;
// We have to remove validation, if the fields are not editable ;-)
if($this->validator)
$this->validator->removeValidation();
}
/**
* Generate extra special fields - namely the security token field (if required).
*
* @return FieldSet
*/
public function getExtraFields() {
$extraFields = new FieldSet();
$token = $this->getSecurityToken();
$tokenField = $token->updateFieldSet($this->fields);
if($tokenField) $tokenField->setForm($this);
$this->securityTokenAdded = true;
// add the "real" HTTP method if necessary (for PUT, DELETE and HEAD)
if($this->FormMethod() != $this->FormHttpMethod()) {
$methodField = new HiddenField('_method', '', $this->FormHttpMethod());
$methodField->setForm($this);
$extraFields->push($methodField);
}
return $extraFields;
}
/**
* Return the form's fields - used by the templates
*
* @return FieldSet The form fields
*/
function Fields() {
foreach($this->getExtraFields() as $field) {
if(!$this->fields->fieldByName($field->Name())) $this->fields->push($field);
}
return $this->fields;
}
/**
* Return all <input type="hidden"> fields
* in a form - including fields nested in {@link CompositeFields}.
* Useful when doing custom field layouts.
*
* @return FieldSet
*/
function HiddenFields() {
return $this->fields->HiddenFields();
}
/**
* Setter for the form fields.
*
* @param FieldSet $fields
*/
function setFields($fields) {
$this->fields = $fields;
}
/**
* Get a named field from this form's fields.
* It will traverse into composite fields for you, to find the field you want.
* It will only return a data field.
*
* @return FormField
*/
function dataFieldByName($name) {
foreach($this->getExtraFields() as $field) {
if(!$this->fields->dataFieldByName($field->Name())) $this->fields->push($field);
}
return $this->fields->dataFieldByName($name);
}
/**
* Return the form's action buttons - used by the templates
*
* @return FieldSet The action list
*/
function Actions() {
return $this->actions;
}
/**
* Setter for the form actions.
*
* @param FieldSet $actions
*/
function setActions($actions) {
$this->actions = $actions;
}
/**
* Unset all form actions
*/
function unsetAllActions(){
$this->actions = new FieldSet();
}
/**
* Unset the form's action button by its name.
*
* @param string $name
*/
function unsetActionByName($name) {
$this->actions->removeByName($name);
}
/**
* Unset the form's dataField by its name
*/
function unsetDataFieldByName($fieldName){
foreach($this->Fields()->dataFields() as $child) {
if(is_object($child) && ($child->Name() == $fieldName || $child->Title() == $fieldName)) {
$child = null;
}
}
}
/**
* Remove a field from the given tab.
*/
public function unsetFieldFromTab($tabName, $fieldName) {
// Find the tab
$tab = $this->Fields()->findOrMakeTab($tabName);
$tab->removeByName($fieldName);
}
/**
* Return the attributes of the form tag - used by the templates.
*
* @return string The attribute string
*/
function FormAttributes() {
$attributes = array();
// Forms shouldn't be cached, cos their error messages won't be shown
HTTP::set_cache_age(0);
// workaround to include javascript validation
if($this->validator && !$this->jsValidationIncluded) $this->validator->includeJavascriptValidation();
// compile attributes
$attributes['id'] = $this->FormName();
$attributes['action'] = $this->FormAction();
$attributes['method'] = $this->FormMethod();
$attributes['enctype'] = $this->FormEncType();
if($this->target) $attributes['target'] = $this->target;
if($this->extraClass()) $attributes['class'] = $this->extraClass();
if($this->validator && $this->validator->getErrors()) {
if(!isset($attributes['class'])) $attributes['class'] = '';
$attributes['class'] .= ' validationerror';
}
// implode attributes into string
$preparedAttributes = '';
foreach($attributes as $k => $v) {
// Note: as indicated by the $k == value item here; the decisions over what to include in the attributes can sometimes get finicky
if(!empty($v) || $v === '0' || $k == 'value') $preparedAttributes .= " $k=\"" . Convert::raw2att($v) . "\"";
}
return $preparedAttributes;
}
/**
* Set the target of this form to any value - useful for opening the form contents in a new window or refreshing another frame
*
* @param target The value of the target
*/
function setTarget($target) {
$this->target = $target;
}
/**
* Set the legend value to be inserted into
* the <legend> element in the Form.ss template.
*/
function setLegend($legend) {
$this->legend = $legend;
}
/**
* Set the SS template that this form should use
* to render with. The default is "Form".
*
* @param string $template The name of the template (without the .ss extension)
*/
function setTemplate($template) {
$this->template = $template;
}
/**
* Return the template to render this form with.
* If the template isn't set, then default to the
* form class name e.g "Form".
*
* @return string
*/
function getTemplate() {
if($this->template) return $this->template;
else return $this->class;
}
/**
* Returns the encoding type of the form.
* This will be either "multipart/form-data"" if there are any {@link FileField} instances,
* otherwise "application/x-www-form-urlencoded"
*
* @return string The encoding mime type
*/
function FormEncType() {
if(is_array($this->fields->dataFields())){
foreach($this->fields->dataFields() as $field) {
if(is_a($field, "FileField")) return "multipart/form-data";
}
}
return "application/x-www-form-urlencoded";
}
/**
* Returns the real HTTP method for the form:
* GET, POST, PUT, DELETE or HEAD.
* As most browsers only support GET and POST in
* form submissions, all other HTTP methods are
* added as a hidden field "_method" that
* gets evaluated in {@link Director::direct()}.
* See {@link FormMethod()} to get a HTTP method
* for safe insertion into a <form> tag.
*
* @return string HTTP method
*/
function FormHttpMethod() {
return $this->formMethod;
}
/**
* Returns the form method to be used in the <form> tag.
* See {@link FormHttpMethod()} to get the "real" method.
*
* @return string Form tag compatbile HTTP method: 'get' or 'post'
*/
function FormMethod() {
if(in_array($this->formMethod,array('get','post'))) {
return $this->formMethod;
} else {
return 'post';
}
}
/**
* Set the form method: GET, POST, PUT, DELETE.
*
* @param $method string
*/
function setFormMethod($method) {
$this->formMethod = strtolower($method);
}
/**
* Return the form's action attribute.
* This is build by adding an executeForm get variable to the parent controller's Link() value
*
* @return string
*/
function FormAction() {
if ($this->formActionPath) {
return $this->formActionPath;
} elseif($this->controller->hasMethod("FormObjectLink")) {
return $this->controller->FormObjectLink($this->name);
} else {
return Controller::join_links($this->controller->Link(), $this->name);
}
}
/** @ignore */
private $formActionPath = false;
/**
* Set the form action attribute to a custom URL.
*
* Note: For "normal" forms, you shouldn't need to use this method. It is recommended only for situations where you have
* two relatively distinct parts of the system trying to communicate via a form post.
*/
function setFormAction($path) {
$this->formActionPath = $path;
}
/**
* @ignore
*/
private $htmlID = null;
/**
* Returns the name of the form
*/
function FormName() {
if($this->htmlID) return $this->htmlID;
else return $this->class . '_' . str_replace(array('.','/'),'',$this->name);
}
/**
* Set the HTML ID attribute of the form
*/
function setHTMLID($id) {
$this->htmlID = $id;
}
/**
* Returns this form's controller
*/
function Controller() {
return $this->controller;
}
/**
* @return string
*/
function Name() {
return $this->name;
}
/**
* Returns an object where there is a method with the same name as each data field on the form.
* That method will return the field itself.
* It means that you can execute $firstNameField = $form->FieldMap()->FirstName(), which can be handy
*/
function FieldMap() {
return new Form_FieldMap($this);
}
/**
* The next functions store and modify the forms
* message attributes. messages are stored in session under
* $_SESSION[formname][message];
*
* @return string
*/
function Message() {
$this->getMessageFromSession();
$message = $this->message;
$this->clearMessage();
return $message;
}
/**
* @return string
*/
function MessageType() {
$this->getMessageFromSession();
return $this->messageType;
}
protected function getMessageFromSession() {
if($this->message || $this->messageType) {
return $this->message;
}else{
$this->message = Session::get("FormInfo.{$this->FormName()}.formError.message");
$this->messageType = Session::get("FormInfo.{$this->FormName()}.formError.type");
Session::clear("FormInfo.{$this->FormName()}");
}
}
/**
* Set a status message for the form.
*
* @param message the text of the message
* @param type Should be set to good, bad, or warning.
* @param boolean $escapeHtml Automatically sanitize the message. Set to FALSE if the message contains HTML.
* In that case, you might want to use {@link Convert::raw2xml()} to escape any
* user supplied data in the message.
*/
function setMessage($message, $type, $escapeHtml = true) {
$this->message = ($escapeHtml) ? Convert::raw2xml($message) : $message;
$this->messageType = $type;
}
/**
* Set a message to the session, for display next time this form is shown.
*
* @param message the text of the message
* @param type Should be set to good, bad, or warning.
* @param boolean $escapeHtml Automatically sanitize the message. Set to FALSE if the message contains HTML.
* In that case, you might want to use {@link Convert::raw2xml()} to escape any
* user supplied data in the message.
*/
function sessionMessage($message, $type, $escapeHtml = true) {
Session::set(
"FormInfo.{$this->FormName()}.formError.message",
$escapeHtml ? Convert::raw2xml($message) : $message
);
Session::set("FormInfo.{$this->FormName()}.formError.type", $type);
}
static function messageForForm( $formName, $message, $type, $escapeHtml = true) {
Session::set(
"FormInfo.{$formName}.formError.message",
$escapeHtml ? Convert::raw2xml($message) : $message
);
Session::set("FormInfo.{$formName}.formError.type", $type);
}
function clearMessage() {
$this->message = null;
Session::clear("FormInfo.{$this->FormName()}.errors");
Session::clear("FormInfo.{$this->FormName()}.formError");
}
function resetValidation() {
Session::clear("FormInfo.{$this->FormName()}.errors");
}
/**
* Returns the DataObject that has given this form its data
* through {@link loadDataFrom()}.
*
* @return DataObject
*/
function getRecord() {
return $this->record;
}
/**
* Get the legend value to be inserted into the
* <legend> element in Form.ss
*
* @return string
*/
function getLegend() {
return $this->legend;
}
/**
* Processing that occurs before a form is executed.
* This includes form validation, if it fails, we redirect back
* to the form with appropriate error messages.
* Triggered through {@link httpSubmission()}.
* Note that CSRF protection takes place in {@link httpSubmission()},
* if it fails the form data will never reach this method.
*
* @return boolean
*/
function validate(){
if($this->validator){
$errors = $this->validator->validate();
if($errors){
if(Director::is_ajax() && $this->validator->getJavascriptValidationHandler() == 'prototype') {
FormResponse::status_message(_t('Form.VALIDATIONFAILED', 'Validation failed'), 'bad');
foreach($errors as $error) {
FormResponse::add(sprintf(
"validationError('%s', '%s', '%s');\n",
Convert::raw2js($error['fieldName']),
Convert::raw2js($error['message']),
Convert::raw2js($error['messageType'])
));
}
} else {
$data = $this->getData();
// Load errors into session and post back
Session::set("FormInfo.{$this->FormName()}", array(
'errors' => $errors,
'data' => $data,
));
}
return false;
}
}
return true;
}
/**
* Load data from the given DataObject or array.
* It will call $object->MyField to get the value of MyField.
* If you passed an array, it will call $object[MyField].
* Doesn't save into dataless FormFields ({@link DatalessField}),
* as determined by {@link FieldSet->dataFields()}.
*
* By default, if a field isn't set (as determined by isset()),
* its value will not be saved to the field, retaining
* potential existing values.
*
* Passed data should not be escaped, and is saved to the FormField instances unescaped.
* Escaping happens automatically on saving the data through {@link saveInto()}.
*
* @uses FieldSet->dataFields()
* @uses FormField->setValue()
*
* @param array|DataObject $data
* @param boolean $clearMissingFields By default, fields which don't match
* a property or array-key of the passed {@link $data} argument are "left alone",
* meaning they retain any previous values (if present). If this flag is set to true,
* those fields are overwritten with null regardless if they have a match in {@link $data}.
* @param $fieldList An optional list of fields to process. This can be useful when you have a
* form that has some fields that save to one object, and some that save to another.
*/
function loadDataFrom($data, $clearMissingFields = false, $fieldList = null) {
if(!is_object($data) && !is_array($data)) {
user_error("Form::loadDataFrom() not passed an array or an object", E_USER_WARNING);
return false;
}
// if an object is passed, save it for historical reference through {@link getRecord()}
if(is_object($data)) $this->record = $data;
// dont include fields without data
$dataFields = $this->fields->dataFields();
if($dataFields) foreach($dataFields as $field) {
$name = $field->Name();
// Skip fields that have been exlcuded
if($fieldList && !in_array($name, $fieldList)) continue;
// First check looks for (fieldname)_unchanged, an indicator that we shouldn't overwrite the field value
if(is_array($data) && isset($data[$name . '_unchanged'])) continue;
// get value in different formats
$hasObjectValue = false;
if(
is_object($data)
&& (
isset($data->$name)
|| $data->hasMethod($name)
|| ($data->hasMethod('hasField') && $data->hasField($name))
)
) {
// We don't actually call the method because it might be slow.
// In a later release, relation methods will just return references to the query that should be executed,
// and so we will be able to safely pass the return value of the
// relation method to the first argument of setValue
$val = $data->__get($name);
$hasObjectValue = true;
} else if(strpos($name,'[') && is_array($data) && !isset($data[$name])) {
// if field is in array-notation, we need to resolve the array-structure PHP creates from query-strings
preg_match('/' . addcslashes($name,'[]') . '=([^&]*)/', urldecode(http_build_query($data)), $matches);
$val = isset($matches[1]) ? $matches[1] : null;
} elseif(is_array($data) && array_key_exists($name, $data)) {
// else we assume its a simple keyed array
$val = $data[$name];
} else {
$val = null;
}
// save to the field if either a value is given, or loading of blank/undefined values is forced
if(isset($val) || $hasObjectValue || $clearMissingFields) {
// pass original data as well so composite fields can act on the additional information
$field->setValue($val, $data);
}
}
}
/**
* Save the contents of this form into the given data object.
* It will make use of setCastedField() to do this.
*
* @param $dataObject The object to save data into
* @param $fieldList An optional list of fields to process. This can be useful when you have a
* form that has some fields that save to one object, and some that save to another.
*/
function saveInto(DataObjectInterface $dataObject, $fieldList = null) {
$dataFields = $this->fields->saveableFields();
$lastField = null;
if($dataFields) foreach($dataFields as $field) {
// Skip fields that have been exlcuded
if($fieldList && is_array($fieldList) && !in_array($field->Name(), $fieldList)) continue;
$saveMethod = "save{$field->Name()}";
if($field->Name() == "ClassName"){
$lastField = $field;
}else if( $dataObject->hasMethod( $saveMethod ) ){
$dataObject->$saveMethod( $field->dataValue());
} else if($field->Name() != "ID"){
$field->saveInto($dataObject);
}
}
if($lastField) $lastField->saveInto($dataObject);
}
/**
* Get the submitted data from this form through
* {@link FieldSet->dataFields()}, which filters out
* any form-specific data like form-actions.
* Calls {@link FormField->dataValue()} on each field,
* which returns a value suitable for insertion into a DataObject
* property.
*
* @return array
*/
function getData() {
$dataFields = $this->fields->dataFields();
$data = array();
if($dataFields){
foreach($dataFields as $field) {
if($field->Name()) {
$data[$field->Name()] = $field->dataValue();
}
}
}
return $data;
}
/**
* Resets a specific field to its passed default value.
* Does NOT clear out all submitted data in the form.
*
* @param string $fieldName
* @param mixed $fieldValue
*/
function resetField($fieldName, $fieldValue = null) {
$dataFields = $this->fields->dataFields();
if($dataFields) foreach($dataFields as $field) {
if($field->Name()==$fieldName) {
$field = $field->setValue($fieldValue);
}
}
}
/**
* Call the given method on the given field.
* This is used by Ajax-savvy form fields. By putting '&action=callfieldmethod' to the end
* of the form action, they can access server-side data.
* @param fieldName The name of the field. Can be overridden by $_REQUEST[fieldName]
* @param methodName The name of the field. Can be overridden by $_REQUEST[methodName]
*/
function callfieldmethod($data) {
$fieldName = $data['fieldName'];
$methodName = $data['methodName'];
$fields = $this->fields->dataFields();
// special treatment needed for TableField-class and TreeDropdownField
if(strpos($fieldName, '[')) {
preg_match_all('/([^\[]*)/',$fieldName, $fieldNameMatches);
preg_match_all('/\[([^\]]*)\]/',$fieldName, $subFieldMatches);
$tableFieldName = $fieldNameMatches[1][0];
$subFieldName = $subFieldMatches[1][1];
}
if(isset($tableFieldName) && isset($subFieldName) && is_a($fields[$tableFieldName], 'TableField')) {
$field = $fields[$tableFieldName]->getField($subFieldName, $fieldName);
return $field->$methodName();
} else if(isset($fields[$fieldName])) {
return $fields[$fieldName]->$methodName();
} else {
user_error("Form::callfieldmethod() Field '$fieldName' not found", E_USER_ERROR);
}
}
/**
* Return a rendered version of this form.
*
* This is returned when you access a form as $FormObject rather
* than <% control FormObject %>
*/
function forTemplate() {
return $this->renderWith(array(
$this->getTemplate(),
'Form'
));
}
/**
* Return a rendered version of this form, suitable for ajax post-back.
* It triggers slightly different behaviour, such as disabling the rewriting of # links
*/
function forAjaxTemplate() {
$view = new SSViewer(array(
$this->getTemplate(),
'Form'
));
return $view->dontRewriteHashlinks()->process($this);
}
/**
* Returns an HTML rendition of this form, without the <form> tag itself.
* Attaches 3 extra hidden files, _form_action, _form_name, _form_method, and _form_enctype. These are
* the attributes of the form. These fields can be used to send the form to Ajax.
*/
function formHtmlContent() {
// Call FormAttributes to force inclusion of custom client-side validation of fields
// because it won't be included by the template
if($this->validator && !$this->jsValidationIncluded) $this->validator->includeJavascriptValidation();
$this->IncludeFormTag = false;
$content = $this->forTemplate();
$this->IncludeFormTag = true;
$content .= "<input type=\"hidden\" name=\"_form_action\" id=\"" . $this->FormName . "_form_action\" value=\"" . $this->FormAction() . "\" />\n";
$content .= "<input type=\"hidden\" name=\"_form_name\" value=\"" . $this->FormName() . "\" />\n";
$content .= "<input type=\"hidden\" name=\"_form_method\" value=\"" . $this->FormMethod() . "\" />\n";
$content .= "<input type=\"hidden\" name=\"_form_enctype\" value=\"" . $this->FormEncType() . "\" />\n";
return $content;
}
/**
* Render this form using the given template, and return the result as a string
* You can pass either an SSViewer or a template name
*/
function renderWithoutActionButton($template) {
$custom = $this->customise(array(
"Actions" => "",
));
if(is_string($template)) $template = new SSViewer($template);
return $template->process($custom);
}
/**
* Sets the button that was clicked. This should only be called by the Controller.
* @param funcName The name of the action method that will be called.
*/
function setButtonClicked($funcName) {
$this->buttonClickedFunc = $funcName;
}
function buttonClicked() {
foreach($this->actions as $action) {
if($this->buttonClickedFunc == $action->actionName()) return $action;
}
}
/**
* Return the default button that should be clicked when another one isn't available
*/
function defaultAction() {
if($this->hasDefaultAction && $this->actions)
return $this->actions->First();
}
/**
* Disable the default button.
* Ordinarily, when a form is processed and no action_XXX button is available, then the first button in the actions list
* will be pressed. However, if this is "delete", for example, this isn't such a good idea.
*/
function disableDefaultAction() {
$this->hasDefaultAction = false;
}
/**
* Disable the requirement of a security token on this form instance. This security protects
* against CSRF attacks, but you should disable this if you don't want to tie
* a form to a session - eg a search form.
*
* Check for token state with {@link getSecurityToken()} and {@link SecurityToken->isEnabled()}.
*/
function disableSecurityToken() {
$this->securityToken = new NullSecurityToken();
}
/**
* Enable {@link SecurityToken} protection for this form instance.
*
* Check for token state with {@link getSecurityToken()} and {@link SecurityToken->isEnabled()}.
*/
function enableSecurityToken() {
$this->securityToken = new SecurityToken();
}
/**
* Disable security tokens for every form.
* Note that this doesn't apply to {@link SecurityToken}
* instances outside of the Form class, nor applies
* to existing form instances.
*
* See {@link enable_all_security_tokens()}.
*
* @deprecated 2.5 Use SecurityToken::disable()
*/
static function disable_all_security_tokens() {
SecurityToken::disable();
}
/**
* Returns true if security is enabled - that is if the security token
* should be included and checked on this form.
*
* @deprecated 2.5 Use Form->getSecurityToken()->isEnabled()
*
* @return bool
*/
function securityTokenEnabled() {
return $this->securityToken->isEnabled();
}
/**
* Returns the security token for this form (if any exists).
* Doesn't check for {@link securityTokenEnabled()}.
* Use {@link SecurityToken::inst()} to get a global token.
*
* @return SecurityToken|null
*/
function getSecurityToken() {
return $this->securityToken;
}
/**
* Returns the name of a field, if that's the only field that the current controller is interested in.
* It checks for a call to the callfieldmethod action.
* This is useful for optimising your forms
*
* @return string
*/
static function single_field_required() {
if(self::current_action() == 'callfieldmethod') return $_REQUEST['fieldName'];
}
/**
* Return the current form action being called, if available.
* This is useful for optimising your forms
*/
static function current_action() {
return self::$current_action;
}
/**
* Set the current form action. Should only be called by Controller.
*/
static function set_current_action($action) {
self::$current_action = $action;
}
/**
* Compiles all CSS-classes.
*
* @return String CSS-classnames, separated by a space
*/
function extraClass() {
return implode($this->extraClasses, " ");
}
/**
* Add a CSS-class to the form-container.
*
* @param $class String
*/
function addExtraClass($class) {
$this->extraClasses[$class] = $class;
}
/**
* Remove a CSS-class from the form-container.
*
* @param $class String
*/
function removeExtraClass($class) {
if(array_key_exists($class, $this->extraClasses)) unset($this->extraClasses[$class]);
}
function debug() {
$result = "<h3>$this->class</h3><ul>";
foreach($this->fields as $field) {
$result .= "<li>$field" . $field->debug() . "</li>";
}
$result .= "</ul>";
if( $this->validator )
$result .= '<h3>'._t('Form.VALIDATOR', 'Validator').'</h3>' . $this->validator->debug();
return $result;
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
// TESTING HELPERS
//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
/**
* Test a submission of this form.
* @return SS_HTTPResponse the response object that the handling controller produces. You can interrogate this in your unit test.
*/
function testSubmission($action, $data) {
$data['action_' . $action] = true;
return Director::test($this->FormAction(), $data, Controller::curr()->getSession());
//$response = $this->controller->run($data);
//return $response;
}
/**
* Test an ajax submission of this form.
* @return SS_HTTPResponse the response object that the handling controller produces. You can interrogate this in your unit test.
*/
function testAjaxSubmission($action, $data) {
$data['ajax'] = 1;
return $this->testSubmission($action, $data);
}
}
/**
* @package forms
* @subpackage core
*/
class Form_FieldMap extends ViewableData {
protected $form;
function __construct($form) {
$this->form = $form;
parent::__construct();
}
/**
* Ensure that all potential method calls get passed to __call(), therefore to dataFieldByName
*/
function hasMethod($method) {
return true;
}
function __call($method, $args = null) {
return $this->form->Fields()->fieldByName($method);
}
}