mirror of
https://github.com/silverstripe/silverstripe-framework
synced 2024-10-22 14:05:37 +02:00
e820c88be0
git-svn-id: svn://svn.silverstripe.com/silverstripe/open/modules/sapphire/trunk@64403 467b73ca-7a2a-4603-9d3b-597d59a354a9
547 lines
17 KiB
PHP
547 lines
17 KiB
PHP
<?php
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/**
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* Base controller class.
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* Controllers are the cornerstone of all site functionality in Sapphire. The {@link Director}
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* selects a controller to pass control to, and then calls {@link run()}. This method will execute
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* the appropriate action - either by calling the action method, or displaying the action's template.
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*
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* See {@link getTemplate()} for information on how the template is chosen.
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* @package sapphire
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* @subpackage control
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*/
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class Controller extends RequestHandlingData {
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/**
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* @var array $urlParams An array of arguments extracted from the URL
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*/
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protected $urlParams;
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/**
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* @var array $requestParams Contains all GET and POST parameters
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* passed to the current {@link HTTPRequest}.
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* @uses HTTPRequest->requestVars()
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*/
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protected $requestParams;
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/**
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* @var string $action The URL part matched on the current controller as
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* determined by the "$Action" part of the {@link $url_handlers} definition.
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* Should correlate to a public method on this controller.
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* Used in {@link render()} and {@link getViewer()} to determine
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* action-specific templates.
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*/
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protected $action;
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/**
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* The {@link Session} object for this controller
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*/
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protected $session;
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/**
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* Stack of current controllers.
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* Controller::$controller_stack[0] is the current controller.
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*/
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protected static $controller_stack = array();
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protected $basicAuthEnabled = true;
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/**
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* @var HTTPResponse $response The response object that the controller returns.
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* Set in {@link handleRequest()}.
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*/
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protected $response;
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/**
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* @var HTTPRequest $request The request object that the controller was called with.
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* Set in {@link handleRequest()}. Useful to generate the {}
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*/
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protected $request;
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/**
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* Default URL handlers - (Action)/(ID)/(OtherID)
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*/
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static $url_handlers = array(
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'$Action//$ID/$OtherID' => 'handleAction',
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);
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static $allowed_actions = array(
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'handleAction',
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'handleIndex',
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);
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/**
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* Initialisation function that is run before any action on the controller is called.
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*
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* @uses BasicAuth::requireLogin()
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*/
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function init() {
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// Test and development sites should be secured, via basic-auth
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if(ClassInfo::hasTable("Group") && ClassInfo::hasTable("Member") && Director::isTest() && $this->basicAuthEnabled) {
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BasicAuth::requireLogin("SilverStripe test website. Use your CMS login", "ADMIN");
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}
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//
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Cookie::set("PastVisitor", true);
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// ClassInfo::hasTable() called to ensure that we're not in a very-first-setup stage
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if(ClassInfo::hasTable("Group") && ClassInfo::hasTable("Member") && ($member = Member::currentUser())) {
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Cookie::set("PastMember", true);
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DB::query("UPDATE Member SET LastVisited = NOW() WHERE ID = $member->ID", null);
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}
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// This is used to test that subordinate controllers are actually calling parent::init() - a common bug
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$this->baseInitCalled = true;
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}
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/**
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* Handles HTTP requests.
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*
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* If you are going to overload handleRequest, make sure that you start the method with $this->pushCurrent()
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* and end the method with $this->popCurrent(). Failure to do this will create weird session errors.
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*
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* @param $request The {@link HTTPRequest} object that is responsible for distributing request parsing.
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*/
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function handleRequest(HTTPRequest $request) {
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if(!$request) user_error("Controller::handleRequest() not passed a request!", E_USER_ERROR);
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$this->pushCurrent();
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$this->urlParams = $request->allParams();
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$this->request = $request;
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$this->response = new HTTPResponse();
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// Init
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$this->baseInitCalled = false;
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$this->init();
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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);
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// If we had a redirection or something, halt processing.
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if($this->response->isFinished()) {
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$this->popCurrent();
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return $this->response;
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}
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$body = parent::handleRequest($request);
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if($body instanceof HTTPResponse) {
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if(isset($_REQUEST['debug_request'])) Debug::message("Request handler returned HTTPResponse object to $this->class controller; returning it without modification.");
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$this->response = $body;
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} else {
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if(is_object($body)) {
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if(isset($_REQUEST['debug_request'])) Debug::message("Request handler $body->class object to $this->class controller;, rendering with template returned by $body->class::getViewer()");
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$body = $body->getViewer($request->latestParam('Action'))->process($body);
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}
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$this->response->setBody($body);
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}
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ContentNegotiator::process($this->response);
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HTTP::add_cache_headers($this->response);
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$this->popCurrent();
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return $this->response;
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}
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/**
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* Controller's default action handler. It will call the method named in $Action, if that method exists.
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* If $Action isn't given, it will use "index" as a default.
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*/
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function handleAction($request) {
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// urlParams, requestParams, and action are set for backward compatability
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foreach($request->latestParams() as $k => $v) {
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if($v || !isset($this->urlParams[$k])) $this->urlParams[$k] = $v;
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}
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$this->action = str_replace("-","_",$request->param('Action'));
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$this->requestParams = $request->requestVars();
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if(!$this->action) $this->action = 'index';
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$methodName = $this->action;
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// run & init are manually disabled, because they create infinite loops and other dodgy situations
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if($this->checkAccessAction($this->action) && !in_array(strtolower($this->action), array('run', 'init'))) {
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if($this->hasMethod($methodName)) {
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$result = $this->$methodName($request);
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// Method returns an array, that is used to customise the object before rendering with a template
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if(is_array($result)) {
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return $this->getViewer($this->action)->process($this->customise($result));
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// Method returns a string / object, in which case we just return that
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} else {
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return $result;
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}
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// There is no method, in which case we just render this object using a (possibly alternate) template
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} else {
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return $this->getViewer($this->action)->process($this);
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}
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} else {
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return $this->httpError(403, "Action '$this->action' isn't allowed on class $this->class");
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}
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}
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function setURLParams($urlParams) {
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$this->urlParams = $urlParams;
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}
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/**
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* @return array The parameters extracted from the URL by the {@link Director}.
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*/
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function getURLParams() {
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return $this->urlParams;
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}
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/**
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* Returns the HTTPResponse object that this controller is building up.
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* Can be used to set the status code and headers
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*/
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function getResponse() {
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return $this->response;
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}
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/**
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* Get the request with which this controller was called (if any).
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* Usually set in {@link handleRequest()}.
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*
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* @return HTTPRequest
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*/
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function getRequest() {
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return $this->request;
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}
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protected $baseInitCalled = false;
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/**
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* Executes this controller, and return an {@link HTTPResponse} object with the result.
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*
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* This method first does a few set-up activities:
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* - Push this controller ont to the controller stack - see {@link Controller::curr()} for information about this.
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* - Call {@link init()}
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*
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* Then it looks for the action method. The action is taken from $this->urlParams['Action'] - for this reason, it's important
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* to have $Action included in your Director rule
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*
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* If $requestParams['executeForm'] is set, then the Controller assumes that we're processing a form. This is usually
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* set by adding ?executeForm=XXX to the form's action URL. Form processing differs in the following ways:
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* - The action name will be the name of the button clicked. If no button-click can be detected, the first button in the
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* list will be assumed.
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* - If the given action method doesn't exist on the controller, Controller will look for that method on the Form object.
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* this lets developers package both a form and its action handlers in a single subclass of Form.
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*
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* NOTE: You should rarely need to overload run() - this kind of change is only really appropriate for things like nested
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* controllers - {@link ModelAsController} and {@link RootURLController} are two examples here. If you want to make more
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* orthodox functionality, it's better to overload {@link init()} or {@link index()}.
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*
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* Execute the appropriate action handler. If none is given, use defaultAction to display
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* a template. The default action will be appropriate in most cases where displaying data
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* is the core goal; the Viewer can call methods on the controller to get the data it needs.
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*
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* @param array $requestParams GET and POST variables.
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* @return HTTPResponse The response that this controller produces, including HTTP headers such as redirection info
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*/
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/**
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* Return the object that is going to own a form that's being processed, and handle its execution.
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* Note that the result needn't be an actual controller object.
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*/
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function getFormOwner() {
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// Get the appropraite ocntroller: sometimes we want to get a form from another controller
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if(isset($this->requestParams['formController'])) {
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$formController = Director::getControllerForURL($this->requestParams['formController']);
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while(is_a($formController, 'NestedController')) {
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$formController = $formController->getNestedController();
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}
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return $formController;
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} else {
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return $this;
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}
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}
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/**
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* This is the default action handler used if a method doesn't exist.
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* It will process the controller object with the template returned by {@link getViewer()}
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*/
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function defaultAction($action) {
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return $this->getViewer($action)->process($this);
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}
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/**
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* Returns the action that is being executed on this controller.
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*/
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function getAction() {
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return $this->action;
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}
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/**
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* Return an SSViewer object to process the data
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* @return SSViewer The viewer identified being the default handler for this Controller/Action combination
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*/
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function getViewer($action) {
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// Hard-coded templates
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if($this->templates[$action]) {
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$templates = $this->templates[$action];
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} else if($this->templates['index']) {
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$templates = $this->templates['index'];
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} else if($this->template) {
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$templates = $this->template;
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} else {
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// Add action-specific templates for inheritance chain
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$parentClass = $this->class;
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if($action && $action != 'index') {
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$parentClass = $this->class;
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while($parentClass != "Controller") {
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$templates[] = strtok($parentClass,'_') . '_' . $action;
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$parentClass = get_parent_class($parentClass);
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}
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}
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// Add controller templates for inheritance chain
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$parentClass = $this->class;
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while($parentClass != "Controller") {
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$templates[] = strtok($parentClass,'_');
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$parentClass = get_parent_class($parentClass);
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}
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// remove duplicates
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$templates = array_unique($templates);
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}
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return new SSViewer($templates);
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}
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/**
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* Render the current controller with the templates determined
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* by {@link getViewer()}.
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*
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* @param array $params Key-value array for custom template variables (Optional)
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* @return string Parsed template content
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*/
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function render($params = null) {
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$template = $this->getViewer($this->getAction());
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// if the object is already customised (e.g. through Controller->run()), use it
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$obj = ($this->customisedObj) ? $this->customisedObj : $this;
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if($params) $obj = $this->customise($params);
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return $template->process($obj);
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}
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/**
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* Call this to disable basic authentication on test sites.
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* must be called in the init() method
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* @deprecated Use BasicAuth::disable() instead? This is used in CliController - it should be updated.
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*/
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function disableBasicAuth() {
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$this->basicAuthEnabled = false;
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}
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/**
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* Returns the current controller
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* @returns Controller
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*/
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public static function curr() {
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if(Controller::$controller_stack) {
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return Controller::$controller_stack[0];
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} else {
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user_error("No current controller available", E_USER_WARNING);
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}
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}
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/**
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* Tests whether we have a currently active controller or not
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* @return boolean True if there is at least 1 controller in the stack.
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*/
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public static function has_curr() {
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return Controller::$controller_stack ? true : false;
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}
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/**
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* Returns true if the member is allowed to do the given action.
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* @param perm The permission to be checked, such as 'View'.
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* @param member The member whose permissions need checking. Defaults to the currently logged
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* in user.
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* @return boolean
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*/
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function can($perm, $member = null) {
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if(!$member) $member = Member::currentUser();
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if($this->hasMethod($methodName = 'can' . $perm)) {
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return $this->$methodName($member);
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} else {
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return true;
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}
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}
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//-----------------------------------------------------------------------------------
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/**
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* returns a date object for use within a template
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* Usage: $Now.Year - Returns 2006
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* @return Date The current date
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*/
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function Now() {
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$d = new Date(null);
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$d->setValue(date("Y-m-d h:i:s"));
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return $d;
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}
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/**
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* Returns an absolute link to this controller
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*/
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function AbsoluteLink() {
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return Director::absoluteURL($this->Link());
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}
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/**
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* Returns the currently logged in user
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*/
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function CurrentMember() {
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return Member::currentUser();
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}
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/**
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* Returns true if the visitor has been here before
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* @return boolean
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*/
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function PastVisitor() {
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return Cookie::get("PastVisitor") ? true : false;
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}
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/**
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* Return true if the visitor has signed up for a login account before
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* @return boolean
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*/
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function PastMember() {
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return Cookie::get("PastMember") ? true : false;
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}
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/**
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* Pushes this controller onto the stack of current controllers.
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* This means that any redirection, session setting, or other things that rely on Controller::curr() will now write to this
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* controller object.
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*/
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function pushCurrent() {
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array_unshift(self::$controller_stack, $this);
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// Create a new session object
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if(!$this->session) {
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if(isset(self::$controller_stack[1])) {
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$this->session = self::$controller_stack[1]->getSession();
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} else {
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$this->session = new Session(null);
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}
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}
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}
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/**
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* Pop this controller off the top of the stack.
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*/
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function popCurrent() {
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if($this === self::$controller_stack[0]) {
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array_shift(self::$controller_stack);
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} else {
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user_error("popCurrent called on $this->class controller, but it wasn't at the top of the stack", E_USER_WARNING);
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}
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}
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/**
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* Redirct to the given URL.
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* It is generally recommended to call Director::redirect() rather than calling this function directly.
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*/
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function redirect($url, $code=302) {
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if($this->response->getHeader('Location')) {
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user_error("Already directed to " . $this->response->getHeader('Location') . "; now trying to direct to $url", E_USER_WARNING);
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return;
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}
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// Attach site-root to relative links, if they have a slash in them
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if($url == "" || $url[0] == '?' || (substr($url,0,4) != "http" && $url[0] != "/" && strpos($url,'/') !== false)){
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$url = Director::baseURL() . $url;
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}
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$this->response->redirect($url, $code);
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}
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/**
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* Redirect back. Uses either the HTTP_REFERER or a manually set request-variable called
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* _REDIRECT_BACK_URL.
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* This variable is needed in scenarios where not HTTP-Referer is sent (
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* e.g when calling a page by location.href in IE).
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* If none of the two variables is available, it will redirect to the base
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* URL (see {@link Director::baseURL()}).
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* @uses redirect()
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*/
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function redirectBack() {
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if($this->request->requestVar('_REDIRECT_BACK_URL')) {
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$url = $this->request->requestVar('_REDIRECT_BACK_URL');
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} else if($this->request->getHeader('Referer')) {
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$url = $this->request->getHeader('Referer');
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} else {
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$url = Director::baseURL();
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}
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$this->redirect($url);
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}
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/**
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* Tests whether a redirection has been requested.
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* @return string If redirect() has been called, it will return the URL redirected to. Otherwise, it will return null;
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*/
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function redirectedTo() {
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return $this->response->getHeader('Location');
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}
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/**
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* Get the Session object representing this Controller's session
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* @return Session
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*/
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function getSession() {
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return $this->session;
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}
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/**
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* Set the Session object.
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*/
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function setSession(Session $session) {
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$this->session = $session;
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}
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/**
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* Returns true if this controller is processing an ajax request
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* @return boolean True if this controller is processing an ajax request
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*/
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function isAjax() {
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return (
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isset($this->requestParams['ajax']) ||
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(isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == "XMLHttpRequest")
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);
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}
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/**
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* Joins two link segments together, putting a slash between them if necessary.
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* Use this for building the results of Link() methods.
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*
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* If either of the links have query strings, then they will be combined and put at the end of the resulting url.
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*/
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static function join_links() {
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$args = func_get_args();
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$result = "";
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$querystrings = array();
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foreach($args as $arg) {
|
|
if(strpos($arg,'?') !== false) {
|
|
list($arg, $suffix) = explode('?',$arg,2);
|
|
$querystrings[] = $suffix;
|
|
}
|
|
if($arg) {
|
|
if($result && substr($result,-1) != '/' && $arg[0] != '/') $result .= "/$arg";
|
|
else $result .= $arg;
|
|
}
|
|
}
|
|
|
|
if($querystrings) $result .= '?' . implode('&', $querystrings);
|
|
|
|
return $result;
|
|
}
|
|
}
|
|
|
|
?>
|