<?php
/**
 * @copyright	Copyright (C) 2005 - 2012 Open Source Matters, Inc. All rights reserved.
 * @license		GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

/**
 * Frontpage View class
 *
 * @package		Joomla.Site
 * @subpackage	com_content
 * @since		1.5
 */
class ContentViewFeatured extends JViewLegacy
{
	protected $state = null;
	protected $item = null;
	protected $items = null;
	protected $pagination = null;

	protected $lead_items = array();
	protected $intro_items = array();
	protected $link_items = array();
	protected $columns = 1;

	/**
	 * Display the view
	 *
	 * @return	mixed	False on error, null otherwise.
	 */
	function display($tpl = null)
	{
		// Initialise variables.
		$user = JFactory::getUser();
		$app = JFactory::getApplication();

		$state 		= $this->get('State');
		$items 		= $this->get('Items');
		$pagination	= $this->get('Pagination');

		// Check for errors.
		if (count($errors = $this->get('Errors'))) {
			JError::raiseWarning(500, implode("\n", $errors));
			return false;
		}

		$params = &$state->params;

		// PREPARE THE DATA

		// Get the metrics for the structural page layout.
		$numLeading = $params->def('num_leading_articles', 1);
		$numIntro = $params->def('num_intro_articles', 4);
		$numLinks = $params->def('num_links', 4);

		// Compute the article slugs and prepare introtext (runs content plugins).
		foreach ($items as $i => & $item)
		{
			$item->slug = $item->alias ? ($item->id . ':' . $item->alias) : $item->id;
			$item->catslug = ($item->category_alias) ? ($item->catid . ':' . $item->category_alias) : $item->catid;
			$item->parent_slug = ($item->parent_alias) ? ($item->parent_id . ':' . $item->parent_alias) : $item->parent_id;
			// No link for ROOT category
			if ($item->parent_alias == 'root') {
				$item->parent_slug = null;
			}

			$item->event = new stdClass();

			$dispatcher = JDispatcher::getInstance();

			$item->introtext = JHtml::_('content.prepare', $item->introtext, '', 'com_content.featured');

			$results = $dispatcher->trigger('onContentAfterTitle', array('com_content.article', &$item, &$item->params, 0));
			$item->event->afterDisplayTitle = trim(implode("\n", $results));

			$results = $dispatcher->trigger('onContentBeforeDisplay', array('com_content.article', &$item, &$item->params, 0));
			$item->event->beforeDisplayContent = trim(implode("\n", $results));

			$results = $dispatcher->trigger('onContentAfterDisplay', array('com_content.article', &$item, &$item->params, 0));
			$item->event->afterDisplayContent = trim(implode("\n", $results));
		}

		// Preprocess the breakdown of leading, intro and linked articles.
		// This makes it much easier for the designer to just interogate the arrays.
		$max = count($items);

		// The first group is the leading articles.
		$limit = $numLeading;
		for ($i = 0; $i < $limit && $i < $max; $i++)
		{
			$this->lead_items[$i] = &$items[$i];
		}

		// The second group is the intro articles.
		$limit = $numLeading + $numIntro;
		// Order articles across, then down (or single column mode)
		for ($i = $numLeading; $i < $limit && $i < $max; $i++)
		{
			$this->intro_items[$i] = &$items[$i];
		}

		$this->columns = max(1, $params->def('num_columns', 1));
		$order = $params->def('multi_column_order', 1);

		if ($order == 0 && $this->columns > 1)
		{
			// call order down helper
			$this->intro_items = ContentHelperQuery::orderDownColumns($this->intro_items, $this->columns);
		}

		// The remainder are the links.
		for ($i = $numLeading + $numIntro; $i < $max; $i++)
		{
			$this->link_items[$i] = &$items[$i];
		}

		//Escape strings for HTML output
		$this->pageclass_sfx = htmlspecialchars($params->get('pageclass_sfx'));

		$this->assignRef('params', $params);
		$this->assignRef('items', $items);
		$this->assignRef('pagination', $pagination);
		$this->assignRef('user', $user);

		$this->_prepareDocument();

		parent::display($tpl);
	}

	/**
	 * Prepares the document
	 */
	protected function _prepareDocument()
	{
		$app		= JFactory::getApplication();
		$menus		= $app->getMenu();
		$title 		= null;

		// Because the application sets a default page title,
		// we need to get it from the menu item itself
		$menu = $menus->getActive();
		if ($menu)
		{
			$this->params->def('page_heading', $this->params->get('page_title', $menu->title));
		} else {
			$this->params->def('page_heading', JText::_('JGLOBAL_ARTICLES'));
		}

		$title = $this->params->get('page_title', '');
		if (empty($title)) {
			$title = $app->getCfg('sitename');
		}
		elseif ($app->getCfg('sitename_pagetitles', 0) == 1) {
			$title = JText::sprintf('JPAGETITLE', $app->getCfg('sitename'), $title);
		}
		elseif ($app->getCfg('sitename_pagetitles', 0) == 2) {
			$title = JText::sprintf('JPAGETITLE', $title, $app->getCfg('sitename'));
		}
		$this->document->setTitle($title);

		if ($this->params->get('menu-meta_description'))
		{
			$this->document->setDescription($this->params->get('menu-meta_description'));
		}

		if ($this->params->get('menu-meta_keywords'))
		{
			$this->document->setMetadata('keywords', $this->params->get('menu-meta_keywords'));
		}

		if ($this->params->get('robots'))
		{
			$this->document->setMetadata('robots', $this->params->get('robots'));
		}

		// Add feed links
		if ($this->params->get('show_feed_link', 1))
		{
			$link = '&format=feed&limitstart=';
			$attribs = array('type' => 'application/rss+xml', 'title' => 'RSS 2.0');
			$this->document->addHeadLink(JRoute::_($link . '&type=rss'), 'alternate', 'rel', $attribs);
			$attribs = array('type' => 'application/atom+xml', 'title' => 'Atom 1.0');
			$this->document->addHeadLink(JRoute::_($link . '&type=atom'), 'alternate', 'rel', $attribs);
		}
	}
}
