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<?php
/**
 * Joomla! Content Management System
 *
 * @copyright  (C) 2016 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;

\defined('JPATH_PLATFORM') or die;

use Joomla\CMS\Factory;
use Joomla\CMS\Language\Text;
use Joomla\CMS\Layout\FileLayout;
use Joomla\CMS\Object\CMSObject;
use Joomla\CMS\Toolbar\Toolbar;
use Joomla\CMS\Toolbar\ToolbarHelper;

/**
 * Base class for a Joomla List View
 *
 * Class holding methods for displaying presentation data.
 *
 * @since  2.5.5
 */
class ListView extends HtmlView
{
	/**
	 * An array of items
	 *
	 * @var  array
	 */
	protected $items;

/**
	 * The pagination object
	 *
	 * @var  \Joomla\CMS\Pagination\Pagination
	 */
	protected $pagination;

/**
	 * The model state
	 *
	 * @var  CMSObject
	 */
	protected $state;

/**
	 * The actions the user is authorised to perform
	 *
	 * @var  CMSObject
	 */
	protected $canDo;

/**
	 * Form object for search filters
	 *
	 * @var  \Joomla\CMS\Form\Form
	 */
	public $filterForm;

/**
	 * The active search filters
	 *
	 * @var  array
	 */
	public $activeFilters;

/**
	 * The sidebar markup
	 *
	 * @var  string
	 */
	protected $sidebar;

/**
	 * The toolbar title
	 *
	 * @var string
	 */
	protected $toolbarTitle;

/**
	 * The toolbar icon
	 *
	 * @var string
	 */
	protected $toolbarIcon;

/**
	 * The flag which determine whether we want to show batch button
	 *
	 * @var boolean
	 */
	protected $supportsBatch = true;

/**
	 * The help link for the view
	 *
	 * @var string
	 */
	protected $helpLink;

/**
	 * Constructor
	 *
	 * @param   array  $config  An optional associative array of configuration settings.
	 */
	public function __construct(array $config)
	{
		parent::__construct($config);

// Set class properties from config data passed in constructor
		if (isset($config['toolbar_title']))
		{
			$this->toolbarTitle = $config['toolbar_title'];
		}
		else
		{
			$this->toolbarTitle = strtoupper($this->option . '_MANAGER_' . $this->getName());
		}

if (isset($config['toolbar_icon']))
		{
			$this->toolbarIcon = $config['toolbar_icon'];
		}
		else
		{
			$this->toolbarIcon = strtolower($this->getName());
		}

if (isset($config['supports_batch']))
		{
			$this->supportsBatch = $config['supports_batch'];
		}

if (isset($config['help_link']))
		{
			$this->helpLink = $config['help_link'];
		}

// Set default value for $canDo to avoid fatal error if child class doesn't set value for this property
		$this->canDo = new CMSObject;
	}

/**
	 * Execute and display a template script.
	 *
	 * @param   string  $tpl  The name of the template file to parse; automatically searches through the template paths.
	 *
	 * @return  void
	 *
	 * @throws  \Exception
	 */
	public function display($tpl = null)
	{
		// Prepare view data
		$this->initializeView();

// Check for errors.
		if (\count($errors = $this->get('Errors')))
		{
			throw new GenericDataException(implode("\n", $errors), 500);
		}

// Build toolbar
		$this->addToolbar();

parent::display($tpl);
	}

/**
	 * Prepare view data
	 *
	 * @return  void
	 */
	protected function initializeView()
	{
		$componentName = substr($this->option, 4);
		$helperClass = ucfirst($componentName . 'Helper');

// Include the component helpers.
		\JLoader::register($helperClass, JPATH_COMPONENT . '/helpers/' . $componentName . '.php');

if ($this->getLayout() !== 'modal')
		{
			if (\is_callable($helperClass . '::addSubmenu'))
			{
				\call_user_func(array($helperClass, 'addSubmenu'), $this->getName());
			}

$this->sidebar = \JHtmlSidebar::render();
		}

$this->items         = $this->get('Items');
		$this->pagination    = $this->get('Pagination');
		$this->state         = $this->get('State');
		$this->filterForm    = $this->get('FilterForm');
		$this->activeFilters = $this->get('ActiveFilters');
	}

/**
	 * Add the page title and toolbar.
	 *
	 * @return  void
	 *
	 * @since   1.6
	 */
	protected function addToolbar()
	{
		$canDo = $this->canDo;
		$user  = Factory::getUser();

// Get the toolbar object instance
		$bar = Toolbar::getInstance('toolbar');

$viewName = $this->getName();
		$singularViewName = \Joomla\String\Inflector::getInstance()->toSingular($viewName);

ToolbarHelper::title(Text::_($this->toolbarTitle), $this->toolbarIcon);

if ($canDo->get('core.create'))
		{
			ToolbarHelper::addNew($singularViewName . '.add');
		}

if (($canDo->get('core.edit')) || ($canDo->get('core.edit.own')))
		{
			ToolbarHelper::editList($singularViewName . '.edit');
		}

if ($canDo->get('core.edit.state'))
		{
			ToolbarHelper::publish($viewName . '.publish', 'JTOOLBAR_PUBLISH', true);
			ToolbarHelper::unpublish($viewName . '.unpublish', 'JTOOLBAR_UNPUBLISH', true);

if (isset($this->items[0]->featured))
			{
				ToolbarHelper::custom($viewName . '.featured', 'featured', '', 'JFEATURE', true);
				ToolbarHelper::custom($viewName . '.unfeatured', 'unfeatured', '', 'JUNFEATURE', true);
			}

ToolbarHelper::archiveList($viewName . '.archive');
			ToolbarHelper::checkin($viewName . '.checkin');
		}

// Add a batch button
		if ($this->supportsBatch && $user->authorise('core.create', $this->option)
			&& $user->authorise('core.edit', $this->option)
			&& $user->authorise('core.edit.state', $this->option))
		{
			$title = Text::_('JTOOLBAR_BATCH');

// Instantiate a new LayoutFile instance and render the popup button
			$layout = new FileLayout('joomla.toolbar.popup');

$dhtml = $layout->render(array('title' => $title));
			$bar->appendButton('Custom', $dhtml, 'batch');
		}

if ($this->state->get('filter.published') == -2 && $canDo->get('core.delete'))
		{
			ToolbarHelper::deleteList('JGLOBAL_CONFIRM_DELETE', $viewName . '.delete', 'JTOOLBAR_EMPTY_TRASH');
		}
		elseif ($canDo->get('core.edit.state'))
		{
			ToolbarHelper::trash($viewName . '.trash');
		}

if ($user->authorise('core.admin', $this->option) || $user->authorise('core.options', $this->option))
		{
			ToolbarHelper::preferences($this->option);
		}

if ($this->helpLink)
		{
			ToolbarHelper::help($this->helpLink);
		}
	}
}