<?php
/**
 * @version		$Id: com_menus.php 385 2010-11-03 09:01:13Z eddieajau $
 * @package		NewLifeInIT
 * @subpackage	com_artofpdf
 * @copyright	Copyright 2010 New Life in IT Pty Ltd. All rights reserved.
 * @license		GNU General Public License version 2 or later.
 * @link		http://www.theartofjoomla.com
 */

// No direct access
defined('_JEXEC') or die;

juimport('joomla.application.component.model16');
juimport('joomla.database.databasequery');
juimport('artof.pdfcontent');

if (!class_exists('ArtofPdfHelper')) {
	require JPATH_COMPONENT.'/helpers/artofpdf.php';
}

/**
 * Model for extracting content from com_content.
 *
 * @package		NewLifeInIT
 * @subpackage	com_artofpdf
 * @since		1.0
 */
class ArtofPdfModelCom_Menus extends JModel16
{
	/**
	 * @var		object	The pdf object.
	 * @since	1.0
	 */
	protected $content;

	/**
	 * @var		array	A list of all the menus.
	 * @since	1.0
	 */
	protected $items;

	protected $lookupType = array();

	protected $lookupParent = array();

	/**
	 * @var		JObject		The component options.
	 * @since	1.0.1
	 */
	protected $options;

	/**
	 * Constructor
	 *
	 * @since	1.5
	 */
	public function __construct($config = array())
	{
		parent::__construct($config);

		// Get the component options.
		$this->options = JComponentHelper::getParams('com_artopdf');

		$db = $this->getDbo();
		$query = new JDatabaseQuery();

		$query->select('a.id, a.menutype, a.parent, a.name, a.link, a.type, a.params, 0 AS level');
		$query->from('#__menu AS a');
		$query->where('a.published = 1');
		$query->where('a.type IN ('.$db->quote('component').','.$db->quote('menulink').')');
		$query->order('a.parent, a.ordering');

		$db->setQuery((string) $query);
		$this->items = $db->loadObjectList('id');

		if ($error = $db->getErrorMsg()) {
			return JError::raiseError(500, $error);
		}

		// Convert params and create reverse lookup arrays.
		foreach ($this->items as &$item)
		{
			// Resolve the link query arguments.
			if ($q = parse_url($item->link, PHP_URL_QUERY)) {
				$vars = array();
				parse_str($q, $vars);
				$item->link = new JObject;
				$item->link->setProperties($vars);
			}
			else {
				$item->link = new JObject;
			}

			// Convert the params to a simple JObject.
			$temp = new JParameter($item->params);
			$item->params = new JObject;
			$item->params->setProperties($temp->toArray());
			unset($temp);

			// Group by menu type.
			if (empty($this->lookupType[$item->menutype])) {
				$this->lookupType[$item->menutype] = array();
			}

			$this->lookupType[$item->menutype][] = &$item;

			// Group by parent.
			if (empty($this->lookupParent[$item->parent])) {
				$this->lookupParent[$item->parent] = array();
			}

			$this->lookupParent[$item->parent][$item->id] = &$item;
		}

		// Debug
//		foreach ($this->lookupParent as $id => $items) {
//			echo "<br>Parent: $id, Children:".implode(',', array_keys($items));
//		}

		// Compute the level of each item.
		$this->setLevel();
	}

	/**
	 * Get all the menu items in a menu.
	 *
	 * @param	string	$name	The name of the menu.
	 *
	 * @return	array
	 * @since	1.0
	 */
	protected function &getMenu($name, $recurse = true)
	{
		$result = array();

		if (isset($this->lookupType[$name])) {
			$result = &$this->lookupType[$name];
		}

		return $result;
	}

	/**
	 * Get an array of menu items.
	 *
	 * @param	int		$parentId	An optional parent id by which to get items.
	 * @return	array
	 * @since	1.0
	 */
	public function &getItems($parentId = null)
	{
		// Initialiase variables.
		$result = array();

		if (!empty($parentId)) {
			if (isset($this->lookupParent[$parentId])) {
				$result = &$this->lookupParent($parentId);
			}
		}
		else if (!empty($this->content['menu'])) {
			$result = &$this->getMenu($this->content['menu'][0]);
		}

		return $result;
	}

	/**
	 * Resolves the content for the menu item.
	 *
	 * @param	object	$item	The menu item.
	 *
	 * @return	object	The resolved menu item as an object with properties title, html.
	 * @since	1.0
	 */
	public function resolve($item)
	{
		// Work on a clone of the item.
		$temp = clone $item;

		// Resolve the alias if applicable.
		if ($item->type == 'menulink' && $id = $item->params->get('menu_item')) {
			if (isset($this->items[$id])) {
				$temp = $this->items[$id];
			}
		}

		// Interogate the link.
		$option	= ucfirst(strtolower(str_replace('com_', '', $temp->link->get('option'))));
		$view	= ucfirst(strtolower($temp->link->get('view')));

		if ($option && $view) {
			// There is an option and a view. Push into a ComponentView handler.
			$method = 'resolve'.$option.$view;

			if (method_exists($this, $method)) {
				$resolved = $this->$method($temp);
			}
			else {
				$resolved = $this->resolveGeneric($item, '<p>Unknown option '.$option.' and view '.$view.'</p>');
			}
		}
		else if ($option) {
			// There is just an option. Push into a component handler.
			$method = 'resolve'.$option;

			if (method_exists($this, $method)) {
				$resolved = $this->$method($temp);
			}
			else {
				$resolved = $this->resolveGeneric($item, '<p>Unknown option '.$option.'</p>');
			}
		}
		else {
			// No idea what this is.
			$resolved = $this->resolveGeneric($item, '<p>Unknown content.</p>');
		}

		return $resolved;
	}

	/**
	 * Resolves a content article into HTML.
	 *
	 * @param	object	$item	The menu item.
	 *
	 * @return	string	The HTML reprsentation of the content.
	 * @throws	Exception
	 */
	protected function resolveContentArticle($item)
	{
		// Get the generic content and work from there.
		$resolved = $this->resolveGeneric($item);

		// Get the article and assign content.
		if ($id = $item->link->get('id')) {
			$model		= JModel::getInstance('com_content', 'ArtofPdfModel');
			$article	= $model->getArticle($id);

			// Override the page title with the content title (but leave the bookmark title).
			$resolved->title	= $article->title;

			// TODO Examine menu params for appropriate switches.
			$resolved->html		= $article->introtext.$article->fulltext;

			$directives = ArtofPdfHelper::getDirectives($article->metakey);
			if (!empty($directives)) {
				if (in_array('nonewpage', $directives)) {
					$resolved->newpage = false;
				}
				else if (in_array('newpage', $directives)) {
					$resolved->newpage = false;
				}
			}
		}
		else {
			$resolved->html = JText::sprintf('COM_ARTOFPDF_ERROR_INVALID_CONTENT_MENU_ID');
		}

		return $resolved;
	}

	/**
	 * Resolves a content category into HTML.
	 *
	 * @param	object	$item	The menu item.
	 *
	 * @return	string	The HTML reprsentation of the content.
	 * @throws	Exception
	 */
	protected function resolveContentCategory($item)
	{
		// Get the generic content and work from there.
		$resolved = $this->resolveGeneric($item);

		// Get the article and assign content.
		if ($id = $item->link->get('id')) {
			$model		= JModel::getInstance('Com_content', 'ArtofPdfModel');
			$category	= $model->getCategory($id);

			// Override the page title with the content title (but leave the bookmark title).
			$resolved->title	= $category->title;

			// TODO Examine menu params for appropriate switches.
			$resolved->html		= $category->description;

			// HACK!
			if ($item->level > 0) {
				$resolved->newpage = false;
			}

			// Now, add the articles as children to this item.
			if (empty($resolved->children)) {
				// Increment the menu level for the level of the article.
				$level = $item->level + 1;

				// Add each of the articles.
				foreach ($category->articles as $article)
				{
					$child = new JPdfContent($article->title, $level, $article->introtext.$article->fulltext);
					$child->newpage	= false;

					$resolved->children[] = $child;
				}
			}
			else {
				// TODO What to do if there are menu children?
			}
		}
		else {
			$resolved->html = JText::sprintf('COM_ARTOFPDF_ERROR_INVALID_CONTENT_MENU_ID');
		}

		return $resolved;
	}

	/**
	 * Resolves a generic menu item.
	 *
	 * @param	object	$item	The menu item.
	 * @param	string	$html	The HTML content to use of the item.
	 *
	 * @return	string	The HTML reprsentation of the content.
	 * @throws	Exception
	 */
	protected function resolveGeneric($item, $html = '')
	{
		$resolved = new JPdfContent($item->name, $item->level, $html);

		if (!empty($this->lookupParent[$item->id])) {
			$resolved->children	= &$this->lookupParent[$item->id];
		}

		// Debug
//		echo "<br>Resolving: $item->id, ".count($resolved->children);

		return $resolved;
	}

	/**
	 * Sets the PDF object in the model.
	 *
	 * @param	object	$content	The PDF content definition.
	 *
	 * @return	void
	 * @since	1.6
	 */
	public function setContent($content)
	{
		$this->content = $content;
	}

	/**
	 * Recursively set the level in the menu tree.
	 *
	 * @param	object	$id		The id of the current parent item.
	 * @param	int		$level	The current level.
	 *
	 * @return	void
	 * @since	1.0
	 */
	protected function setLevel($id = 0, $level = 0)
	{
		// Second pass, compute the level of each item.
		if (!empty($this->lookupParent[$id])) {
			foreach ($this->lookupParent[$id] as &$item)
			{
				$item->level = $level;
				$this->setLevel($item->id, $level + 1);
				//echo "<br>ID: {$item->id}, Level: $level, Parent: {$item->parent}";
			}
		}
	}
}