silverstripe-framework/core/control/Controller.php
Matt Peel 7d13ba7fb8 Reverted geoffm's accidental commit to /open
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@50107 467b73ca-7a2a-4603-9d3b-597d59a354a9
2008-02-25 02:10:37 +00:00

574 lines
18 KiB
PHP

<?php
/**
* @package sapphire
* @subpackage control
*/
/**
* Base controller class.
* Controllers are the cornerstone of all site functionality in Sapphire. The {@link Director}
* selects a controller to pass control to, and then calls {@link run()}. This method will execute
* the appropriate action - either by calling the action method, or displaying the action's template.
*
* See {@link getTemplate()} for information on how the template is chosen.
* @package sapphire
* @subpackage control
*/
class Controller extends ViewableData {
/**
* Define a list of actions that are allowed to be called on this controller.
* The variable should be an array of action names. This sample shows the different values that it can contain:
*
* <code>
* array(
* 'someaction', // someaction can be accessed by anyone, any time
* 'otheraction' => true, // So can otheraction
* 'restrictedaction' => 'ADMIN', // restrictedaction can only be people with ADMIN privilege
* 'complexaction' '->canComplexAction' // complexaction can only be accessed if $this->canComplexAction() returns true
* );
* </code>
*/
static $allowed_actions = null;
protected $urlParams;
protected $requestParams;
protected $action;
/**
* The {@link Session} object for this controller
*/
protected $session;
/**
* Stack of current controllers.
* Controller::$controller_stack[0] is the current controller.
*/
protected static $controller_stack = array();
protected $basicAuthEnabled = true;
/**
* The HTTPResponse object that the controller returns
*/
protected $response;
function setURLParams($urlParams) {
$this->urlParams = $urlParams;
}
/**
* @return array The parameters extracted from the URL by the {@link Director}.
*/
function getURLParams() {
return $this->urlParams;
}
/**
* Returns the HTTPResponse object that this controller is building up.
* Can be used to set the status code and headers
*/
function getResponse() {
return $this->response;
}
/**
* Executes this controller, and return an {@link HTTPResponse} object with the result.
*
* This method first does a few set-up activities:
* - Push this controller ont to the controller stack - see {@link Controller::curr()} for information about this.
* - Call {@link init()}
*
* Then it looks for the action method. The action is taken from $this->urlParams['Action'] - for this reason, it's important
* to have $Action included in your Director rule
*
* If $requestParams['executeForm'] is set, then the Controller assumes that we're processing a form. This is usually
* set by adding ?executeForm=XXX to the form's action URL. Form processing differs in the following ways:
* - The action name will be the name of the button clicked. If no button-click can be detected, the first button in the
* list will be assumed.
* - If the given action method doesn't exist on the controller, Controller will look for that method on the Form object.
* this lets developers package both a form and its action handlers in a single subclass of Form.
*
* NOTE: You should rarely need to overload run() - this kind of change is only really appropriate for things like nested
* controllers - {@link ModelAsController} and {@link RootURLController} are two examples here. If you want to make more
* orthodox functionality, it's better to overload {@link init()} or {@link index()}.
*
*
*
* Execute the appropriate action handler. If none is given, use defaultAction to display
* a template. The default action will be appropriate in most cases where displaying data
* is the core goal; the Viewer can call methods on the controller to get the data it needs.
*
* @param array $requestParams GET and POST variables.
* @return HTTPResponse The response that this controller produces, including HTTP headers such as redirection info
*/
protected $baseInitCalled = false;
function run($requestParams) {
if(isset($_GET['debug_profile'])) Profiler::mark("Controller", "run");
$this->pushCurrent();
$this->response = new HTTPResponse();
$this->requestParams = $requestParams;
$this->action = isset($this->urlParams['Action']) ? strtolower(str_replace("-","_",$this->urlParams['Action'])) : "";
if(!$this->action) $this->action = 'index';
// Check security on the controller
if(!$this->checkAccessAction($this->action)) {
user_error("Disallowed action: '$this->action' on controller '$this->class'", E_USER_ERROR);
}
// Init
$this->baseInitCalled = false;
$this->init();
if(!$this->baseInitCalled) user_error("init() method on class '$this->class' doesn't call Controller::init(). Make sure that you have parent::init() included.", E_USER_WARNING);
// If we had a redirection or something, halt processing.
if($this->response->isFinished()) {
$this->popCurrent();
return $this->response;
}
// Look at the action variables for forms
$funcName = null;
foreach($this->requestParams as $paramName => $paramVal) {
if(substr($paramName,0,7) == 'action_') {
// Cleanup action_, _x and _y from image fields
$funcName = preg_replace(array('/^action_/','/_x$|_y$/'),'',$paramName);
break;
}
}
// Form handler
if(isset($this->requestParams['executeForm']) && is_string($this->requestParams['executeForm'])) {
if(isset($funcName)) {
Form::set_current_action($funcName);
}
// Get the appropraite ocntroller: sometimes we want to get a form from another controller
if(isset($this->requestParams['formController'])) {
$formController = Director::getControllerForURL($this->requestParams['formController']);
while(is_a($formController, 'NestedController')) {
$formController = $formController->getNestedController();
}
} else {
$formController = $this;
}
// Create the form object
$form = $formController;
$formObjParts = explode('.', $this->requestParams['executeForm']);
foreach($formObjParts as $formMethod){
if(isset($_GET['debug_profile'])) Profiler::mark("Calling $formMethod", "on $form->class");
$form = $form->$formMethod();
if(isset($_GET['debug_profile'])) Profiler::unmark("Calling $formMethod", "on $form->class");
if(!$form) break; //user_error("Form method '" . $this->requestParams['executeForm'] . "' returns null in controller class '$this->class' ($_SERVER[REQUEST_URI])", E_USER_ERROR);
}
// Populate the form
if(isset($_GET['debug_profile'])) Profiler::mark("Controller", "populate form");
if($form){
$form->loadDataFrom($this->requestParams, true);
// disregard validation if a single field is called
if(!isset($_REQUEST['action_callfieldmethod'])) {
$valid = $form->beforeProcessing();
if(!$valid) {
$this->popCurrent();
return $this->response;
}
}else{
$fieldcaller = $form->dataFieldByName($requestParams['fieldName']);
if(is_a($fieldcaller, "TableListField")){
if($fieldcaller->hasMethod('php')){
$valid = $fieldcaller->php($requestParams);
if(!$valid) exit();
}
}
}
// If the action wasnt' set, choose the default on the form.
if(!isset($funcName) && $defaultAction = $form->defaultAction()){
$funcName = $defaultAction->actionName();
}
if(isset($funcName)) {
$form->setButtonClicked($funcName);
}
}else{
user_error("No form (" . Session::get('CMSMain.currentPage') . ") returned by $formController->class->$_REQUEST[executeForm]", E_USER_WARNING);
}
if(isset($_GET['debug_profile'])) Profiler::unmark("Controller", "populate form");
if(!isset($funcName)) {
user_error("No action button has been clicked in this form executon, and no default has been allowed", E_USER_ERROR);
}
// Protection against CSRF attacks
if($form->securityTokenEnabled()) {
$securityID = Session::get('SecurityID');
if(!$securityID || !isset($this->requestParams['SecurityID']) || $securityID != $this->requestParams['SecurityID']) {
// Don't show error on live sites, as spammers create a million of these
if(Director::isDev()) {
trigger_error("Security ID doesn't match, possible CRSF attack.", E_USER_ERROR);
} else {
die();
}
}
}
// First, try a handler method on the controller
if($this->hasMethod($funcName) || !$form) {
if(isset($_GET['debug_controller'])){
Debug::show("Found function $funcName on the controller");
}
if(isset($_GET['debug_profile'])) Profiler::mark("$this->class::$funcName (controller action)");
$result = $this->$funcName($this->requestParams, $form);
if(isset($_GET['debug_profile'])) Profiler::unmark("$this->class::$funcName (controller action)");
// Otherwise, try a handler method on the form object
} else {
if(isset($_GET['debug_controller'])) {
Debug::show("Found function $funcName on the form object");
}
if(isset($_GET['debug_profile'])) Profiler::mark("$form->class::$funcName (form action)");
$result = $form->$funcName($this->requestParams, $form);
if(isset($_GET['debug_profile'])) Profiler::unmark("$form->class::$funcName (form action)");
}
// Normal action
} else {
if(!isset($funcName)) $funcName = $this->action;
if($this->hasMethod($funcName)) {
if(isset($_GET['debug_controller'])) Debug::show("Found function $funcName on the $this->class controller");
if(isset($_GET['debug_profile'])) Profiler::mark("$this->class::$funcName (controller action)");
$result = $this->$funcName($this->urlParams);
if(isset($_GET['debug_profile'])) Profiler::unmark("$this->class::$funcName (controller action)");
} else {
if(isset($_GET['debug_controller'])) Debug::show("Running default action for $funcName on the $this->class controller" );
if(isset($_GET['debug_profile'])) Profiler::mark("Controller::defaultAction($funcName)");
$result = $this->defaultAction($funcName, $this->urlParams);
if(isset($_GET['debug_profile'])) Profiler::unmark("Controller::defaultAction($funcName)");
}
}
// If your controller function returns an array, then add that data to the
// default template
if(is_array($result)) {
$extended = $this->customise($result);
$viewer = $this->getViewer($funcName);
$result = $viewer->process($extended);
}
$this->response->setBody($result);
if($result) ContentNegotiator::process($this->response);
// Set up HTTP cache headers
HTTP::add_cache_headers($this->response);
if(isset($_GET['debug_profile'])) Profiler::unmark("Controller", "run");
$this->popCurrent();
return $this->response;
}
function defaultAction($action) {
return $this->getViewer($action)->process($this);
}
function getAction() {
return $this->action;
}
/**
* Return an SSViewer object to process the data
* @return SSViewer The viewer identified being the default handler for this Controller/Action combination
*/
function getViewer($action) {
// Hard-coded templates
if($this->templates[$action]) {
$templates = $this->templates[$action];
} else if($this->templates['index']) {
$templates = $this->templates['index'];
} else if($this->template) {
$templates = $this->template;
} else {
$parentClass = $this->class;
while($parentClass != "Controller") {
$templateName = $parentClass;
if(($pos = strpos($templateName,'_')) !== false) $templateName = substr($templateName, 0, $pos);
if($action && $action != "index") $templates[] = $templateName . '_' . $action;
$templates[] = $templateName;
$parentClass = get_parent_class($parentClass);
}
$templates = array_unique($templates);
}
if(isset($_GET['showtemplate'])) Debug::show($templates);
return new SSViewer($templates);
}
/**
* Call this to disable basic authentication on test sites
* must be called in the init() method
*/
function disableBasicAuth() {
$this->basicAuthEnabled = false;
}
/**
* Initialisation function that is run before any action on the controller is called.
*/
function init() {
// Test and development sites should be secured, via basic-auth
if(ClassInfo::hasTable("Group") && ClassInfo::hasTable("Member") && Director::isTest() && $this->basicAuthEnabled) {
BasicAuth::requireLogin("SilverStripe test website. Use your CMS login", "ADMIN");
}
//
Cookie::set("PastVisitor", true);
// ClassInfo::hasTable() called to ensure that we're not in a very-first-setup stage
if(ClassInfo::hasTable("Group") && ClassInfo::hasTable("Member") && ($member = Member::currentUser())) {
Cookie::set("PastMember", true);
DB::query("UPDATE Member SET LastVisited = NOW() WHERE ID = $member->ID", null);
}
// This is used to test that subordinate controllers are actually calling parent::init() - a common bug
$this->baseInitCalled = true;
}
/**
* @deprecated use Controller::curr() instead
* @returns Controller
*/
public static function currentController() {
user_error('Controller::currentController() is deprecated. Use Controller::curr() instead.', E_USER_NOTICE);
return self::curr();
}
/**
* Returns the current controller
* @returns Controller
*/
public static function curr() {
if(Controller::$controller_stack) {
return Controller::$controller_stack[0];
} else {
user_error("No current controller available", E_USER_WARNING);
}
}
/**
* Tests whether we have a currently active controller or not
* @return boolean True if there is at least 1 controller in the stack.
*/
public static function has_curr() {
return Controller::$controller_stack ? true : false;
}
/**
* Returns true if the member is allowed to do the given action.
* @param perm The permission to be checked, such as 'View'.
* @param member The member whose permissions need checking. Defaults to the currently logged
* in user.
* @return boolean
*/
function can($perm, $member = null) {
if(!$member) $member = Member::currentUser();
if($this->hasMethod($methodName = 'can' . $perm)) {
return $this->$methodName($member);
} else {
return true;
}
}
//-----------------------------------------------------------------------------------
/**
* returns a date object for use within a template
* Usage: $Now.Year - Returns 2006
* @return Date The current date
*/
function Now() {
$d = new Date(null);
$d->setVal(date("Y-m-d h:i:s"));
return $d;
}
/**
* Returns a link to any other page
*/
function LinkTo($a, $b) {
return Director::baseURL() . $a . '/' . $b;
}
function AbsoluteLink() {
return Director::absoluteURL($this->Link());
}
/**
* Returns the currently logged in user
*/
function CurrentMember() {
return Member::currentUser();
}
/**
* Returns true if the visitor has been here before
* @return boolean
*/
function PastVisitor() {
return Cookie::get("PastVisitor") ? true : false;
}
/**
* Return true if the visitor has signed up for a login account before
* @return boolean
*/
function PastMember() {
return Cookie::get("PastMember") ? true : false;
}
/**
* Pushes this controller onto the stack of current controllers.
* This means that any redirection, session setting, or other things that rely on Controller::curr() will now write to this
* controller object.
*/
function pushCurrent() {
array_unshift(self::$controller_stack, $this);
// Create a new session object
if(!$this->session) {
if(isset(self::$controller_stack[1])) {
$this->session = self::$controller_stack[1]->getSession();
} else {
$this->session = new Session(null);
}
}
}
/**
* Pop this controller off the top of the stack.
*/
function popCurrent() {
if($this === self::$controller_stack[0]) {
array_shift(self::$controller_stack);
} else {
user_error("popCurrent called on $this->class controller, but it wasn't at the top of the stack", E_USER_WARNING);
}
}
/**
* Handle redirection
*/
function redirect($url) {
if($this->response->getHeader('Location')) {
user_error("Already directed to " . $this->response->getHeader('Location') . "; now trying to direct to $url", E_USER_ERROR);
}
// Attach site-root to relative links, if they have a slash in them
if($url == "" || $url[0] == '?' || (substr($url,0,4) != "http" && $url[0] != "/" && strpos($url,'/') !== false)){
$url = Director::baseURL() . $url;
}
$this->response->redirect($url);
}
/**
* Tests whether a redirection has been requested.
* @return string If redirect() has been called, it will return the URL redirected to. Otherwise, it will return null;
*/
function redirectedTo() {
return $this->response->getHeader('Location');
}
/**
* Get the Session object representing this Controller's session
* @return Session
*/
function getSession() {
return $this->session;
}
/**
* Set the Session object.
*/
function setSession(Session $session) {
$this->session = $session;
}
/**
* Returns true if this controller is processing an ajax request
* @return boolean True if this controller is processing an ajax request
*/
function isAjax() {
return (
isset($this->requestParams['ajax']) ||
(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == "XMLHttpRequest")
);
}
/**
* Check thAT
*/
function checkAccessAction($action) {
// Collate self::$allowed_actions from this class and all parent classes
$access = null;
$className = $this->class;
while($className != 'Controller') {
// Merge any non-null parts onto $access.
$accessPart = eval("return $className::\$allowed_actions;");
if($accessPart !== null) $access = array_merge((array)$access, $accessPart);
// Build an array of parts for checking if part[0] == part[1], which means that this class doesn't directly define it.
$accessParts[] = $accessPart;
$className = get_parent_class($className);
}
if($access === null || $accessParts[0] === $accessParts[1]) {
// user_error("Deprecated: please define static \$allowed_actions on your Controllers for security purposes", E_USER_NOTICE);
return true;
}
if($action == 'index') return true;
if(isset($access[$action])) {
$test = $access[$action];
if($test === true) return true;
if(substr($test,0,2) == '->') {
$funcName = substr($test,2);
return $this->$funcName();
}
if(Permission::check($test)) return true;
} else if((($key = array_search($action, $access)) !== false) && is_numeric($key)) {
return true;
}
return false;
}
}
?>