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<?php
/**
* Joomla! Content Management System
*
* @copyright (C) 2005 Open Source Matters, Inc. <https://www.joomla.org>
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\MVC\View;
use Joomla\CMS\Document\Document;
use Joomla\CMS\Document\DocumentAwareInterface;
use Joomla\CMS\Factory;
use Joomla\CMS\Language\LanguageAwareInterface;
use Joomla\CMS\Language\LanguageAwareTrait;
use Joomla\CMS\MVC\Model\BaseDatabaseModel;
use Joomla\CMS\Object\CMSObject;
use Joomla\Event\DispatcherAwareInterface;
use Joomla\Event\DispatcherAwareTrait;
use Joomla\Event\DispatcherInterface;
use Joomla\Event\EventInterface;
// phpcs:disable PSR1.Files.SideEffects
\defined('JPATH_PLATFORM') or die;
// phpcs:enable PSR1.Files.SideEffects
/**
* Base class for a Joomla View
*
* Class holding methods for displaying presentation data.
*
* @since 2.5.5
*/
abstract class AbstractView extends CMSObject implements ViewInterface, DispatcherAwareInterface, DocumentAwareInterface, LanguageAwareInterface
{
use DispatcherAwareTrait;
use LanguageAwareTrait;
/**
* The active document object
*
* @var Document
* @since 3.0
*
* @deprecated 4.4.0 will be removed in 6.0
* Use $this->getDocument() instead
*/
public $document;
/**
* The URL option for the component. It is usually passed by controller while it creates the view
*
* @var string
* @since 3.0
*/
protected $option = null;
/**
* The name of the view
*
* @var string
* @since 3.0
*/
protected $_name = null;
/**
* Registered models
*
* @var array
* @since 3.0
*/
protected $_models = [];
/**
* The default model
*
* @var string
* @since 3.0
*/
protected $_defaultModel = null;
/**
* Constructor
*
* @param array $config A named configuration array for object construction.
* name: the name (optional) of the view (defaults to the view class name suffix).
* charset: the character set to use for display
* escape: the name (optional) of the function to use for escaping strings
* base_path: the parent path (optional) of the views directory (defaults to the component folder)
* template_plath: the path (optional) of the layout directory (defaults to base_path + /views/ + view name
* helper_path: the path (optional) of the helper files (defaults to base_path + /helpers/)
* layout: the layout (optional) to use to display the view
*
* @since 3.0
*/
public function __construct($config = [])
{
// Set the view name
if (empty($this->_name)) {
if (\array_key_exists('name', $config)) {
$this->_name = $config['name'];
} else {
$this->_name = $this->getName();
}
}
// Set the component name if passed
if (!empty($config['option'])) {
$this->option = $config['option'];
}
}
/**
* Execute and display a template script.
*
* @param string $tpl The name of the template file to parse; automatically searches through the template paths.
*
* @return void
*
* @since 3.0
*/
abstract public function display($tpl = null);
/**
* Method to get data from a registered model or a property of the view
*
* @param string $property The name of the method to call on the model or the property to get
* @param string $default The name of the model to reference or the default value [optional]
*
* @return mixed The return value of the method
*
* @since 3.0
*/
public function get($property, $default = null)
{
// If $model is null we use the default model
if ($default === null) {
$model = $this->_defaultModel;
} else {
$model = strtolower($default);
}
// First check to make sure the model requested exists
if (isset($this->_models[$model])) {
// Model exists, let's build the method name
$method = 'get' . ucfirst($property);
// Does the method exist?
if (method_exists($this->_models[$model], $method)) {
// The method exists, let's call it and return what we get
return $this->_models[$model]->$method();
}
}
// Degrade to CMSObject::get
return parent::get($property, $default);
}
/**
* Method to get the model object
*
* @param string $name The name of the model (optional)
*
* @return BaseDatabaseModel The model object
*
* @since 3.0
*/
public function getModel($name = null)
{
if ($name === null) {
$name = $this->_defaultModel;
}
return $this->_models[strtolower($name)];
}
/**
* Method to add a model to the view. We support a multiple model single
* view system by which models are referenced by classname. A caveat to the
* classname referencing is that any classname prepended by \JModel will be
* referenced by the name without \JModel, eg. \JModelCategory is just
* Category.
*
* @param BaseDatabaseModel $model The model to add to the view.
* @param boolean $default Is this the default model?
*
* @return BaseDatabaseModel The added model.
*
* @since 3.0
*/
public function setModel($model, $default = false)
{
$name = strtolower($model->getName());
$this->_models[$name] = $model;
if ($default) {
$this->_defaultModel = $name;
}
return $model;
}
/**
* Method to get the view name
*
* The model name by default parsed using the classname, or it can be set
* by passing a $config['name'] in the class constructor
*
* @return string The name of the model
*
* @since 3.0
* @throws \Exception
*/
public function getName()
{
if (empty($this->_name)) {
$reflection = new \ReflectionClass($this);
if ($viewNamespace = $reflection->getNamespaceName()) {
$pos = strrpos($viewNamespace, '\\');
if ($pos !== false) {
$this->_name = strtolower(substr($viewNamespace, $pos + 1));
}
} else {
$className = \get_class($this);
$viewPos = strpos($className, 'View');
if ($viewPos != false) {
$this->_name = strtolower(substr($className, $viewPos + 4));
}
}
if (empty($this->_name)) {
throw new \Exception(sprintf($this->text('JLIB_APPLICATION_ERROR_GET_NAME'), __METHOD__), 500);
}
}
return $this->_name;
}
/**
* Get the Document.
*
* @return Document
*
* @since 4.4.0
* @throws \UnexpectedValueException May be thrown if the document has not been set.
*/
protected function getDocument(): Document
{
if ($this->document) {
return $this->document;
}
throw new \UnexpectedValueException('Document not set in ' . __CLASS__);
}
/**
* Set the document to use.
*
* @param Document $document The document to use
*
* @return void
*
* @since 4.4.0
*/
public function setDocument(Document $document): void
{
$this->document = $document;
}
/**
* Get the event dispatcher.
*
* The override was made to keep a backward compatibility for legacy component.
* TODO: Remove the override in 6.0
*
* @return DispatcherInterface
*
* @since 4.4.0
* @throws \UnexpectedValueException May be thrown if the dispatcher has not been set.
*/
public function getDispatcher()
{
if (!$this->dispatcher) {
@trigger_error(
sprintf('Dispatcher for %s should be set through MVC factory. It will throw an exception in 6.0', __CLASS__),
E_USER_DEPRECATED
);
return Factory::getContainer()->get(DispatcherInterface::class);
}
return $this->dispatcher;
}
/**
* Dispatches the given event on the internal dispatcher, does a fallback to the global one.
*
* @param EventInterface $event The event
*
* @return void
*
* @since 4.1.0
*
* @deprecated 4.4 will be removed in 6.0. Use $this->getDispatcher() directly.
*/
protected function dispatchEvent(EventInterface $event)
{
$this->getDispatcher()->dispatch($event->getName(), $event);
@trigger_error(
sprintf(
'Method %s is deprecated and will be removed in 6.0. Use getDispatcher()->dispatch() directly.',
__METHOD__
),
E_USER_DEPRECATED
);
}
}