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<?php
/**
* Kunena Component
* @package Kunena.Administrator.Template
* @subpackage Categories
*
* @copyright (C) 2008 - 2014 Kunena Team. All rights reserved.
* @license http://www.gnu.org/copyleft/gpl.html GNU/GPL
* @link http://www.kunena.org
**/
defined ( '_JEXEC' ) or die ();
/**
* Implements Kunena layouts for the views.
*
* This class is part of Kunena HMVC implementation, allowing calls to
* any layout file.
*
* <code>
* echo KunenaLayout::factory('pagination')->set('pagination', $this->pagination);
* echo KunenaLayout::factory('pagination/footer')->set('pagination', $this->pagination);
* </code>
*
* Individual layout classes are located in /components/com_kunena/layouts,
* but they are not needed to get layouts to work. They are useful, though,
* if template files would otherwise have too much code in them.
*
* Layout template files can be found from /components/com_Kunena/template/[template]/layouts.
* Default layout can be overridden by ->setLayout():
*
* <code>
* echo KunenaLayout::factory('pagination')->set('pagination', $this->pagination)->setLayout('mini');
* </code>
*
* @see KunenaRequest
*/
class KunenaLayout
{
/**
* The view layout.
*
* @var string
*/
protected $layout = 'default';
/**
* The paths queue.
*
* @var SplPriorityQueue
*/
protected $paths;
/**
* Method to instantiate the layout.
*
* @param SplPriorityQueue $paths The paths queue.
*/
public function __construct(SplPriorityQueue $paths = null)
{
// Setup dependencies.
$this->paths = isset($paths) ? $paths : $this->loadPaths();
}
/**
* Magic toString method that is a proxy for the render method.
*
* @return string
*/
public function __toString()
{
try {
return (string) $this->render();
} catch (Exception $e) {
// Exceptions aren't allowed in string conversion, use PHP error instead.
trigger_error($e->getMessage(), E_USER_ERROR);
return '';
}
}
/**
* Method to escape output.
*
* @param string $output The output to escape.
*
* @return string The escaped output.
*
* @see JView::escape()
*/
public function escape($output)
{
// Escape the output.
return htmlspecialchars($output, ENT_COMPAT, 'UTF-8');
}
/**
* Method to render the view.
*
* @return string The rendered view.
* @throws RuntimeException
*/
public function render()
{
// Get the layout path.
$path = $this->getPath($this->getLayout());
// Check if the layout path was found.
if (!$path) {
throw new RuntimeException("Layout Path For '{$this->getLayout()}' Not Found");
}
// Start an output buffer.
ob_start();
// Load the layout.
include $path;
// Get the layout contents.
$output = ob_get_clean();
return $output;
}
/**
* Method to get the view layout.
*
* @return string The layout name.
*/
public function getLayout()
{
return $this->layout;
}
/**
* Method to get the layout path.
*
* @param string $layout The layout name.
*
* @return mixed The layout file name if found, false otherwise.
*/
public function getPath($layout)
{
// Get the layout file name.
$file = JPath::clean($layout . '.php');
$paths = array();
foreach ($this->paths as $path) {
$paths[] = $path;
}
// Find the layout file path.
$path = JPath::find($paths, $file);
return $path;
}
/**
* Method to get the view paths.
*
* @return SplPriorityQueue The paths queue.
*/
public function getPaths()
{
return $this->paths;
}
/**
* Method to set the view layout.
*
* @param string $layout The layout name.
*
* @return KunenaLayout Method supports chaining.
*/
public function setLayout($layout)
{
$this->layout = $layout;
return $this;
}
/**
* Method to set the view paths.
*
* @param SplPriorityQueue $paths The paths queue.
*
* @return KunenaLayout Method supports chaining.
*/
public function setPaths(SplPriorityQueue $paths)
{
$this->paths = $paths;
return $this;
}
/**
* Modifies a property of the object, creating it if it does not already exist.
*
* @param string $property The name of the property.
* @param mixed $value The value of the property to set.
*
* @return KunenaLayout Method supports chaining.
*/
public function set($property, $value = null)
{
$this->$property = $value;
return $this;
}
/**
* Set the object properties based on a named array/hash.
*
* @param mixed $properties Either an associative array or another object.
*
* @return KunenaLayout Method supports chaining.
*
* @see set()
* @throws \InvalidArgumentException
*/
public function setProperties($properties)
{
if (!is_array($properties) && !is_object($properties)) {
throw new \InvalidArgumentException('Parameter should be either array or an object.');
}
foreach ((array) $properties as $k => $v) {
// Use the set function which might be overridden.
$this->set($k, $v);
}
return $this;
}
/**
* Method to load the paths queue.
*
* @return SplPriorityQueue The paths queue.
*/
protected function loadPaths()
{
return new SplPriorityQueue();
}
/**
* Returns layout class.
*
* <code>
* // Output pagination/pages layout with current cart instance.
* echo KunenaLayout::factory('pagination/pages')->set('pagination', $this->pagination);
* </code>
*
* @param mixed $paths String or array of strings.
* @return KunenaLayout
*/
public static function factory($paths) {
if (!is_array($paths)) $paths = (array) $paths;
$app = JFactory::getApplication();
// Add all paths for the template overrides.
$templatePaths = new SplPriorityQueue();
if ($app->isAdmin()) {
$template = KunenaFactory::getAdminTemplate();
$base = 'layouts';
} else {
$template = KunenaFactory::getTemplate();
$base = 'html/layouts';
}
foreach ($paths as $path) {
if (!$path) continue;
$lookup = $template->getTemplatePaths("{$base}/{$path}", true);
foreach ($lookup as $loc) {
$templatePaths->insert($loc, 1);
}
}
// Go through all the matching layouts.
foreach ($paths as $path) {
if (!$path) continue;
// Attempt to load layout class if it doesn't exist.
$class = 'KunenaLayout' . (string) preg_replace('/[^A-Z0-9_]/i', '', $path);
if (!class_exists($class)) {
$filename = JPATH_BASE . "/components/com_kunena/layouts/{$path}/layout.php";
if (!is_file($filename)) {
continue;
}
require_once $filename;
}
// Create layout object.
return new $class($templatePaths);
}
// Create default layout object.
return new KunenaLayout($templatePaths);
}
}