helper.php

<?php
/**
 * @package     Joomla.Site
 * @subpackage  mod_articles_news_adv
 *
 * @copyright   Copyright (C) 2005 - 2013 Open Source Matters, Inc. All rights reserved.
 * @license     GNU General Public License version 2 or later; see LICENSE.txt
 */

defined('_JEXEC') or die;

require_once JPATH_SITE.'/components/com_content/helpers/route.php';

JModelLegacy::addIncludePath(JPATH_SITE.'/components/com_content/models', 'ContentModel');

/**
 * Helper for mod_articles_news_adv
 *
 * @package     Joomla.Site
 * @subpackage  mod_articles_news_adv
 */
abstract class ModArticlesNewsAdvHelper
{
	public static function getList(&$params)
	{
		$app = JFactory::getApplication();

		// Get an instance of the generic articles model
		$model = JModelLegacy::getInstance('Articles', 'ContentModel', array('ignore_request' => true));

		// Set application parameters in model
		$appParams = JFactory::getApplication()->getParams();
		$model->setState('params', $appParams);

		// Set the filters based on the module params
		$model->setState('list.start', 0);
		$model->setState('list.limit', (int) $params->get('count', 5));

		$model->setState('filter.published', 1);

		$model->setState('list.select', 'a.fulltext, a.id, a.title, a.alias, a.introtext, a.state, a.catid, a.created, a.created_by, a.created_by_alias,' .
			' a.modified, a.modified_by, a.publish_up, a.publish_down, a.images, a.urls, a.attribs, a.metadata, a.metakey, a.metadesc, a.access,' .
			' a.hits, a.featured' );

		// Access filter
		$access = !JComponentHelper::getParams('com_content')->get('show_noauth');
		$authorised = JAccess::getAuthorisedViewLevels(JFactory::getUser()->get('id'));
		$model->setState('filter.access', $access);

		// Category filter
		$model->setState('filter.category_id', $params->get('catid', array()));

		// Filter by language
		$model->setState('filter.language', $app->getLanguageFilter());

		$catids = $params->get('catid');

			if ($params->get('show_child_category_articles', 0) && (int) $params->get('levels', 0) > 0)
			{
				// Get an instance of the generic categories model
				$categories = JModelLegacy::getInstance('Categories', 'ContentModel', array('ignore_request' => true));
				$categories->setState('params', $appParams);
				$levels = $params->get('levels', 1) ? $params->get('levels', 1) : 9999;
				$categories->setState('filter.get_children', $levels);
				$categories->setState('filter.published', 1);
				$categories->setState('filter.access', $access);
				$additional_catids = array();

				foreach ($catids as $catid)
				{
					$categories->setState('filter.parentId', $catid);
					$recursive = true;
					$items = $categories->getItems($recursive);

					if ($items)
					{
						foreach ($items as $category)
						{
							$condition = (($category->level - $categories->getParent()->level) <= $levels);
							if ($condition)
							{
								$additional_catids[] = $category->id;
							}

						}
					}
				}

				$catids = array_unique(array_merge($catids, $additional_catids));
			}

			$model->setState('filter.category_id', $catids);

		// Set ordering
		$ordering = $params->get('ordering', 'a.publish_up');
		$model->setState('list.ordering', $ordering);
		if (trim($ordering) == 'rand()')
		{
			$model->setState('list.direction', '');
		}
		else
		{
			$model->setState('list.direction', $params->get('article_ordering_direction', 'DESC'));
		}

		//	Retrieve Content
		$items = $model->getItems();

		$show_introtext = $params->get('show_introtext', 1);
		$introtext_limit = $params->get('introtext_limit', 0);

		foreach ($items as &$item)
		{
			$item->readmore = strlen(trim($item->fulltext));
			$item->slug = $item->id.':'.$item->alias;
			$item->catslug = $item->catid.':'.$item->category_alias;

			if ($access || in_array($item->access, $authorised))
			{
				// We know that user has the privilege to view the article
				$item->link = JRoute::_(ContentHelperRoute::getArticleRoute($item->slug, $item->catid));
				$item->linkText = JText::_('MOD_ARTICLES_NEWS_READMORE');
			}
			else {
				$item->link = JRoute::_('index.php?option=com_users&view=login');
				$item->linkText = JText::_('MOD_ARTICLES_NEWS_READMORE_REGISTER');
			}

			if ($show_introtext)
			{
				$item->introtext = JHtml::_('content.prepare', $item->introtext, '', 'mod_articles_news.content');
				$item->introtext = $introtext_limit ? self::_cleanIntrotext(self::truncate($item->introtext, $introtext_limit)) : $item->introtext;
			}

			//new
			if (!$params->get('image'))
			{
				$item->introtext = preg_replace('/<img[^>]*>/', '', $item->introtext);
			}

			$results = $app->triggerEvent('onContentAfterDisplay', array('com_content.article', &$item, &$params, 1));
			$item->afterDisplayTitle = trim(implode("\n", $results));

			$results = $app->triggerEvent('onContentBeforeDisplay', array('com_content.article', &$item, &$params, 1));
			$item->beforeDisplayContent = trim(implode("\n", $results));
		}

		return $items;
	}
	public static function _cleanIntrotext($introtext)
	{
		$introtext = str_replace('<p>', ' ', $introtext);
		$introtext = str_replace('</p>', ' ', $introtext);
		$introtext = strip_tags($introtext, '<a><em><strong>');

		$introtext = trim($introtext);

		return $introtext;
	}
	/**
	* Method to truncate introtext
	*
	* The goal is to get the proper length plain text string with as much of
	* the html intact as possible with all tags properly closed.
	*
	* @param string   $html       The content of the introtext to be truncated
	* @param integer  $maxLength  The maximum number of charactes to render
	*
	* @return  string  The truncated string
	*/
	public static function truncate($html, $maxLength = 0)
	{
		$baseLength = strlen($html);

		// First get the plain text string. This is the rendered text we want to end up with.
		$ptString = JHtml::_('string.truncate', $html, $maxLength, $noSplit = true, $allowHtml = false);

		for ($maxLength; $maxLength < $baseLength;)
		{
			// Now get the string if we allow html.
			$htmlString = JHtml::_('string.truncate', $html, $maxLength, $noSplit = true, $allowHtml = true);

			// Now get the plain text from the html string.
			$htmlStringToPtString = JHtml::_('string.truncate', $htmlString, $maxLength, $noSplit = true, $allowHtml = false);

			// If the new plain text string matches the original plain text string we are done.
			if ($ptString == $htmlStringToPtString)
			{
				return $htmlString;
			}
			// Get the number of html tag characters in the first $maxlength characters
			$diffLength = strlen($ptString) - strlen($htmlStringToPtString);

			// Set new $maxlength that adjusts for the html tags
			$maxLength += $diffLength;
			if ($baseLength <= $maxLength || $diffLength <= 0)
			{
				return $htmlString;
			}
		}
		return $html;
	}
}