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controller.php
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controller.php
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<?php
/**
* @version $Id$
* @package Joomla.Framework
* @subpackage Application
* @copyright Copyright (C) 2005 - 2011 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
// No direct access.
defined('JPATH_BASE') or die;
/**
* Base class for a Joomla Controller
*
* Controller (controllers are where you put all the actual code) Provides basic
* functionality, such as rendering views (aka displaying templates).
*
* @abstract
* @package Joomla.Framework
* @subpackage Application
* @since 1.5
*/
class JController extends JObject
{
/**
* ACO Section for the controller.
*
* @var string
* @deprecated 1.6 - Apr 5, 2010
*/
protected $_acoSection;
/**
* Default ACO Section value for the controller.
*
* @var string
* @deprecated 1.6 - Apr 5, 2010
*/
protected $_acoSectionValue;
/**
* The base path of the controller
*
* @var string
* @since 1.6 Replaces _basePath.
*/
protected $basePath;
/**
* @var string The default view for the display method.
* @since 1.6
*/
protected $default_view;
/**
* The mapped task that was performed.
*
* @var string
* @since 1.6 Replaces _doTask.
*/
protected $doTask;
/**
* Redirect message.
*
* @var string
* @since 1.6 Replaces _message.
*/
protected $message;
/**
* Redirect message type.
*
* @var string
* @since 1.6 Replaces _messageType.
*/
protected $messageType;
/**
* Array of class methods
*
* @var array
* @since 1.6 Replaces _methods.
*/
protected $methods;
/**
* The name of the controller
*
* @var array
* @since 1.6 Replaces _name.
*/
protected $name;
/**
* The prefix of the models
*
* @var string
* @since 1.6
*/
protected $model_prefix;
/**
* The set of search directories for resources (views).
*
* @var array
* @since 1.6 Replaces _path.
*/
protected $paths;
/**
* URL for redirection.
*
* @var string
* @since 1.6 Replaces _redirect.
*/
protected $redirect;
/**
* Current or most recent task to be performed.
*
* @var string
* @since 1.6 Replaces _task.
*/
protected $task;
/**
* Array of class methods to call for a given task.
*
* @var array
* @since 1.6 Replaces _taskMap.
*/
protected $taskMap;
/**
* Adds to the stack of model paths in LIFO order.
*
* @param string|array The directory (string), or list of directories (array) to add.
* @param string A prefix for models
* @return void
*/
public static function addModelPath($path, $prefix='')
{
jimport('joomla.application.component.model');
JModel::addIncludePath($path, $prefix);
}
/**
* Create the filename for a resource.
*
* @param string The resource type to create the filename for.
* @param array An associative array of filename information. Optional.
* @return string The filename.
* @since 1.6 Replaced _createFileName.
*/
protected static function createFileName($type, $parts = array())
{
$filename = '';
switch ($type) {
case 'controller':
if (!empty($parts['format'])) {
if ($parts['format'] == 'html') {
$parts['format'] = '';
} else {
$parts['format'] = '.'.$parts['format'];
}
} else {
$parts['format'] = '';
}
$filename = strtolower($parts['name']).$parts['format'].'.php';
break;
case 'view':
if (!empty($parts['type'])) {
$parts['type'] = '.'.$parts['type'];
}
$filename = strtolower($parts['name']).'/view'.$parts['type'].'.php';
break;
}
return $filename;
}
/**
* Method to get a singleton controller instance.
*
* @param string The prefix for the controller.
* @param array An array of optional constructor options.
* @return mixed JController derivative class or JException on error.
* @since 1.6
*/
public static function getInstance($prefix, $config = array())
{
static $instance;
if (!empty($instance)) {
return $instance;
}
// Get the environment configuration.
$basePath = array_key_exists('base_path', $config) ? $config['base_path'] : JPATH_COMPONENT;
$format = JRequest::getWord('format');
$command = JRequest::getVar('task', 'display');
// Check for array format.
$filter = JFilterInput::getInstance();
if (is_array($command)) {
$command = $filter->clean(array_pop(array_keys($command)), 'cmd');
}
else {
$command = $filter->clean($command, 'cmd');
}
// Check for a controller.task command.
if (strpos($command, '.') !== false) {
// Explode the controller.task command.
list($type, $task) = explode('.', $command);
// Define the controller filename and path.
$file = self::createFileName('controller', array('name' => $type, 'format' => $format));
$path = $basePath.'/controllers/'.$file;
// Reset the task without the contoller context.
JRequest::setVar('task', $task);
}
else {
// Base controller.
$type = null;
$task = $command;
// Define the controller filename and path.
$file = self::createFileName('controller', array('name' => 'controller'));
$path = $basePath.'/'.$file;
}
// Get the controller class name.
$class = ucfirst($prefix).'Controller'.ucfirst($type);
// Include the class if not present.
if (!class_exists($class)) {
// If the controller file path exists, include it.
if (file_exists($path)) {
require_once $path;
}
else {
throw new JException(JText::sprintf('JLIB_APPLICATION_ERROR_INVALID_CONTROLLER', $type, $format), 1056, E_ERROR, $type, true);
}
}
// Instantiate the class.
if (class_exists($class)) {
$instance = new $class($config);
}
else {
throw new JException(JText::sprintf('JLIB_APPLICATION_ERROR_INVALID_CONTROLLER_CLASS', $class), 1057, E_ERROR, $class, true);
}
return $instance;
}
/**
* Constructor.
*
* @param array An optional associative array of configuration settings.
* Recognized key values include 'name', 'default_task', 'model_path', and
* 'view_path' (this list is not meant to be comprehensive).
* @since 1.5
*/
public function __construct($config = array())
{
// Initialise variables.
$this->methods = array();
$this->message = null;
$this->messageType = 'message';
$this->paths = array();
$this->redirect = null;
$this->taskMap = array();
// Determine the methods to exclude from the base class.
$xMethods = get_class_methods('JController');
// Get the public methods in this class using reflection.
$r = new ReflectionClass($this);
$rName = $r->getName();
$rMethods = $r->getMethods(ReflectionMethod::IS_PUBLIC);
$methods = array();
foreach ($rMethods as $rMethod)
{
$mName = $rMethod->getName();
// Add default display method if not explicitly declared.
if (!in_array($mName, $xMethods) || $mName == 'display') {
$this->methods[] = strtolower($mName);
// Auto register the methods as tasks.
$this->taskMap[strtolower($mName)] = $mName;
}
}
//set the view name
if (empty($this->name)) {
if (array_key_exists('name', $config)) {
$this->name = $config['name'];
}
else {
$this->name = $this->getName();
}
}
// Set a base path for use by the controller
if (array_key_exists('base_path', $config)) {
$this->basePath = $config['base_path'];
}
else {
$this->basePath = JPATH_COMPONENT;
}
// If the default task is set, register it as such
if (array_key_exists('default_task', $config)) {
$this->registerDefaultTask($config['default_task']);
}
else {
$this->registerDefaultTask('display');
}
// set the models prefix
if (empty($this->model_prefix)) {
if (array_key_exists('model_prefix', $config)) {
// user-defined prefix
$this->model_prefix = $config['model_prefix'];
}
else {
$this->model_prefix = $this->name . 'Model';
}
}
// set the default model search path
if (array_key_exists('model_path', $config)) {
// user-defined dirs
$this->addModelPath($config['model_path'], $this->model_prefix);
}
else {
$this->addModelPath($this->basePath.'/models', $this->model_prefix);
}
// set the default view search path
if (array_key_exists('view_path', $config)) {
// user-defined dirs
$this->setPath('view', $config['view_path']);
}
else {
$this->setPath('view', $this->basePath.'/views');
}
// Set the default view.
if (array_key_exists('default_view', $config)) {
$this->default_view = $config['default_view'];
}
else if (empty($this->default_view)) {
$this->default_view = $this->getName();
}
}
/**
* Adds to the search path for templates and resources.
*
* @param string The path type (e.g. 'model', 'view'.
* @param string|array The directory or stream to search.
* @return JController This object to support chaining.
* @since 1.6 Replaces _addPath.
*/
protected function addPath($type, $path)
{
// just force path to array
settype($path, 'array');
if (!isset($this->paths[$type])) {
$this->paths[$type] = array();
}
// loop through the path directories
foreach ($path as $dir)
{
// no surrounding spaces allowed!
$dir = rtrim(JPath::check($dir, '/'), '/').'/';
// add to the top of the search dirs
array_unshift($this->paths[$type], $dir);
}
return $this;
}
/**
* Add one or more view paths to the controller's stack, in LIFO order.
*
* @param string|array The directory (string), or list of directories (array) to add.
* @return JController This object to support chaining.
*/
public function addViewPath($path)
{
$this->addPath('view', $path);
return $this;
}
/**
* Authorization check
*
* @param string $task The ACO Section Value to check access on
* @return boolean True if authorized
* @since 1.5
* @deprecated 1.6 - Apr 5, 2010
*/
public function authorize($task)
{
$this->authorise($task);
}
/**
* Authorisation check
*
* @param string $task The ACO Section Value to check access on
* @return boolean True if authorised
* @since 1.6
*/
public function authorise($task)
{
// Only do access check if the aco section is set
if ($this->_acoSection) {
// If we have a section value set that trumps the passed task ???
if ($this->_acoSectionValue) {
// We have one, so set it and lets do the check
$task = $this->_acoSectionValue;
}
// Get the JUser object for the current user and return the authorization boolean
$user = JFactory::getUser();
return $user->authorise($this->_acoSection, $task);
}
else {
// Nothing set, nothing to check... so obviously its ok :)
return true;
}
}
/**
* Method to check whether an ID is in the edit list.
*
* @param string $context The context for the session storage.
* @param int $id The ID of the record to add to the edit list.
*
* @return boolean True if the ID is in the edit list.
* @since 1.6
*/
protected function checkEditId($context, $id)
{
if ($id) {
$app = JFactory::getApplication();
$values = (array) $app->getUserState($context.'.id');
$result = in_array((int) $id, $values);
if (JDEBUG) {
jimport('joomla.error.log');
$log = JLog::getInstance('jcontroller.log.php')->addEntry(
array('comment' => sprintf('Checking edit ID %s.%s: %d %s', $context, $id, (int) $result, str_replace("\n", ' ', print_r($values, 1))))
);
}
return $result;
}
else {
// No id for a new item.
return true;
}
}
/**
* Method to load and return a model object.
*
* @param string The name of the model.
* @param string Optional model prefix.
* @param array Configuration array for the model. Optional.
* @return mixed Model object on success; otherwise null failure.
* @since 1.6 Replaces _createModel.
*/
protected function createModel($name, $prefix = '', $config = array())
{
// Clean the model name
$modelName = preg_replace('/[^A-Z0-9_]/i', '', $name);
$classPrefix = preg_replace('/[^A-Z0-9_]/i', '', $prefix);
$result = JModel::getInstance($modelName, $classPrefix, $config);
return $result;
}
/**
* Method to load and return a view object. This method first looks in the
* current template directory for a match, and failing that uses a default
* set path to load the view class file.
*
* Note the "name, prefix, type" order of parameters, which differs from the
* "name, type, prefix" order used in related public methods.
*
* @param string The name of the view.
* @param string Optional prefix for the view class name.
* @param string The type of view.
* @param array Configuration array for the view. Optional.
* @return mixed View object on success; null or error result on failure.
* @since 1.6 Replaces _createView.
*/
protected function createView($name, $prefix = '', $type = '', $config = array())
{
// Clean the view name
$viewName = preg_replace('/[^A-Z0-9_]/i', '', $name);
$classPrefix = preg_replace('/[^A-Z0-9_]/i', '', $prefix);
$viewType = preg_replace('/[^A-Z0-9_]/i', '', $type);
// Build the view class name
$viewClass = $classPrefix . $viewName;
if (!class_exists($viewClass)) {
jimport('joomla.filesystem.path');
$path = JPath::find(
$this->paths['view'],
$this->createFileName('view', array('name' => $viewName, 'type' => $viewType))
);
if ($path) {
require_once $path;
if (!class_exists($viewClass)) {
$result = JError::raiseError(
500, JText::sprintf('JLIB_APPLICATION_ERROR_VIEW_CLASS_NOT_FOUND', $viewClass, $path));
return null;
}
}
else {
return null;
}
}
return new $viewClass($config);
}
/**
* Typical view method for MVC based architecture
*
* This function is provide as a default implementation, in most cases
* you will need to override it in your own controllers.
*
* @param boolean If true, the view output will be cached
* @param array An array of safe url parameters and their variable types, for valid values see {@link JFilterInput::clean()}.
*
* @return JController This object to support chaining.
* @since 1.5
*/
public function display($cachable = false, $urlparams = false)
{
$document = JFactory::getDocument();
$viewType = $document->getType();
$viewName = JRequest::getCmd('view', $this->default_view);
$viewLayout = JRequest::getCmd('layout', 'default');
$view = $this->getView($viewName, $viewType, '', array('base_path' => $this->basePath));
// Get/Create the model
if ($model = $this->getModel($viewName)) {
// Push the model into the view (as default)
$view->setModel($model, true);
}
// Set the layout
$view->setLayout($viewLayout);
$view->assignRef('document', $document);
$conf = JFactory::getConfig();
// Display the view
if ($cachable && $viewType != 'feed' && $conf->get('caching') >= 1) {
$option = JRequest::getCmd('option');
$cache = JFactory::getCache($option, 'view');
if (is_array($urlparams)) {
$app = JFactory::getApplication();
$registeredurlparams = $app->get('registeredurlparams');
if (empty($registeredurlparams)) {
$registeredurlparams = new stdClass();
}
foreach ($urlparams AS $key => $value)
{
// add your safe url parameters with variable type as value {@see JFilterInput::clean()}.
$registeredurlparams->$key = $value;
}
$app->set('registeredurlparams', $registeredurlparams);
}
$cache->get($view, 'display');
}
else {
$view->display();
}
return $this;
}
/**
* Execute a task by triggering a method in the derived class.
*
* @param string The task to perform. If no matching task is found, the '__default' task is executed, if defined.
* @return mixed|false The value returned by the called method, false in error case.
* @since 1.5
*/
public function execute($task)
{
$this->task = $task;
$task = strtolower($task);
if (isset($this->taskMap[$task])) {
$doTask = $this->taskMap[$task];
}
elseif (isset($this->taskMap['__default'])) {
$doTask = $this->taskMap['__default'];
}
else {
return JError::raiseError(404, JText::sprintf('JLIB_APPLICATION_ERROR_TASK_NOT_FOUND', $task));
}
// Record the actual task being fired
$this->doTask = $doTask;
// Make sure we have access
if ($this->authorise($doTask)) {
$retval = $this->$doTask();
return $retval;
}
else {
return JError::raiseError(403, JText::_('JLIB_APPLICATION_ERROR_ACCESS_FORBIDDEN'));
}
}
/**
* Method to get a model object, loading it if required.
*
* @param string The model name. Optional.
* @param string The class prefix. Optional.
* @param array Configuration array for model. Optional.
* @return object The model.
* @since 1.5
*/
public function getModel($name = '', $prefix = '', $config = array())
{
if (empty($name)) {
$name = $this->getName();
}
if (empty($prefix)) {
$prefix = $this->model_prefix;
}
if ($model = $this->createModel($name, $prefix, $config)) {
// task is a reserved state
$model->setState('task', $this->task);
// Lets get the application object and set menu information if its available
$app = JFactory::getApplication();
$menu = $app->getMenu();
if (is_object($menu)) {
if ($item = $menu->getActive()) {
$params = $menu->getParams($item->id);
// Set Default State Data
$model->setState('parameters.menu', $params);
}
}
}
return $model;
}
/**
* Method to get the controller name
*
* The dispatcher name by default parsed using the classname, or it can be set
* by passing a $config['name'] in the class constructor
*
* @return string The name of the dispatcher
* @since 1.5
*/
public function getName()
{
$name = $this->name;
if (empty($name)) {
$r = null;
if (!preg_match('/(.*)Controller/i', get_class($this), $r)) {
JError::raiseError(500, JText::_('JLIB_APPLICATION_ERROR_CONTROLLER_GET_NAME'));
}
$name = strtolower($r[1]);
}
return $name;
}
/**
* Get the last task that is or was to be performed.
*
* @return string The task that was or is being performed.
* @since 1.5
*/
public function getTask()
{
return $this->task;
}
/**
* Gets the available tasks in the controller.
*
* @return array Array[i] of task names.
* @since 1.5
*/
public function getTasks()
{
return $this->methods;
}
/**
* Method to get a reference to the current view and load it if necessary.
*
* @param string The view name. Optional, defaults to the controller name.
* @param string The view type. Optional.
* @param string The class prefix. Optional.
* @param array Configuration array for view. Optional.
* @return object Reference to the view or an error.
* @since 1.5
*/
public function getView($name = '', $type = '', $prefix = '', $config = array())
{
static $views;
if (!isset($views)) {
$views = array();
}
if (empty($name)) {
$name = $this->getName();
}
if (empty($prefix)) {
$prefix = $this->getName() . 'View';
}
if (empty($views[$name])) {
if ($view = $this->createView($name, $prefix, $type, $config)) {
$views[$name] = & $view;
} else {
$result = JError::raiseError(
500, JText::sprintf('JLIB_APPLICATION_ERROR_VIEW_NOT_FOUND', $name, $type, $prefix));
return $result;
}
}
return $views[$name];
}
/**
* Method to add a record ID to the edit list.
*
* @param string $context The context for the session storage.
* @param int $id The ID of the record to add to the edit list.
*
* @return void
* @since 1.6
*/
protected function holdEditId($context, $id)
{
// Initialise variables.
$app = JFactory::getApplication();
$values = (array) $app->getUserState($context.'.id');
// Add the id to the list if non-zero.
if (!empty($id)) {
array_push($values, (int) $id);
$values = array_unique($values);
$app->setUserState($context.'.id', $values);
if (JDEBUG) {
jimport('joomla.error.log');
$log = JLog::getInstance('jcontroller.log.php')->addEntry(
array('comment' => sprintf('Holding edit ID %s.%s %s', $context, $id, str_replace("\n", ' ', print_r($values, 1))))
);
}
}
}
/**
* Redirects the browser or returns false if no redirect is set.
*
* @return boolean False if no redirect exists.
* @since 1.5
*/
public function redirect()
{
if ($this->redirect) {
$app = JFactory::getApplication();
$app->redirect($this->redirect, $this->message, $this->messageType);
}
return false;
}
/**
* Register the default task to perform if a mapping is not found.
*
* @param string The name of the method in the derived class to perform if a named task is not found.
* @return JController This object to support chaining.
* @since 1.5
*/
public function registerDefaultTask($method)
{
$this->registerTask('__default', $method);
return $this;
}
/**
* Register (map) a task to a method in the class.
*
* @param string The task.
* @param string The name of the method in the derived class to perform for this task.
* @return JController This object to support chaining.
* @since 1.5
*/
public function registerTask($task, $method)
{
if (in_array(strtolower($method), $this->methods)) {
$this->taskMap[strtolower($task)] = $method;
}
return $this;
}
/**
* Method to check whether an ID is in the edit list.
*
* @param string $context The context for the session storage.
* @param int $id The ID of the record to add to the edit list.
*
* @return void
* @since 1.6
*/
protected function releaseEditId($context, $id)
{
$app = JFactory::getApplication();
$values = (array) $app->getUserState($context.'.id');
// Do a strict search of the edit list values.
$index = array_search((int) $id, $values, true);
if (is_int($index)) {
unset($values[$index]);
$app->setUserState($context.'.id', $values);
if (JDEBUG) {
jimport('joomla.error.log');
$log = JLog::getInstance('jcontroller.log.php')->addEntry(
array('comment' => sprintf('Releasing edit ID %s.%s %s', $context, $id, str_replace("\n", ' ', print_r($values, 1))))
);
}
}
}
/**
* Sets the access control levels.
*
* @param string The ACO section (eg, the component).
* @param string The ACO section value (if using a constant value).
* @return void
* @since 1.5
* @deprecated 1.6 - Apr 5, 2010
*/
public function setAccessControl($section, $value = null)
{
$this->_acoSection = $section;
$this->_acoSectionValue = $value;
}
/**
* Sets the internal message that is passed with a redirect
*
* @param string Message to display on redirect.
* @param string Message type (since 1.6). Optional, defaults to 'message'.
* @return string Previous message
* @since 1.5
*/
public function setMessage($text, $type = 'message')
{
$previous = $this->message;
$this->message = $text;
$this->messageType = $type;
return $previous;
}
/**
* Sets an entire array of search paths for resources.
*
* @param string The type of path to set, typically 'view' or 'model'.
* @param string|array The new set of search paths. If null or false, resets to the current directory only.
* @since 1.6 Replaces _setPath.
*/
protected function setPath($type, $path)
{
// clear out the prior search dirs
$this->paths[$type] = array();
// actually add the user-specified directories
$this->addPath($type, $path);
}
/**
* Set a URL for browser redirection.
*
* @param string $url URL to redirect to.
* @param string $msg Message to display on redirect. Optional, defaults to value set internally by controller, if any.
* @param string $type Message type. Optional, defaults to 'message' or the type set by a previous call to setMessage.
*
* @return JController This object to support chaining.
*
* @since 1.5
*/
public function setRedirect($url, $msg = null, $type = null)
{
$this->redirect = $url;
if ($msg !== null) {
// controller may have set this directly
$this->message = $msg;
}
// Ensure the type is not overwritten by a previous call to setMessage.
if (empty($type)) {
if (empty($this->messageType)) {
$this->messageType = 'message';
}
}
// If the type is explicitly set, set it.
else {
$this->messageType = $type;
}
return $this;
}
}