<?php
/**
 * @version    2.7.x
 * @package    K2
 * @author     JoomlaWorks http://www.joomlaworks.net
 * @copyright  Copyright (c) 2006 - 2016 JoomlaWorks Ltd. All rights reserved.
 * @license    GNU/GPL license: http://www.gnu.org/copyleft/gpl.html
 */

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

class K2HelperUtilities
{

	// Get user avatar
	public static function getAvatar($userID, $email = NULL, $width = 50)
	{

		jimport('joomla.filesystem.folder');
		jimport('joomla.application.component.model');
		$mainframe = JFactory::getApplication();
		$params = K2HelperUtilities::getParams('com_k2');

		// Check for placeholder overrides
		if (JFile::exists(JPATH_SITE.DS.'templates'.DS.$mainframe->getTemplate().DS.'images'.DS.'placeholder'.DS.'user.png'))
		{
			$avatarPath = 'templates/'.$mainframe->getTemplate().'/images/placeholder/user.png';
		}
		else
		{
			$avatarPath = 'components/com_k2/images/placeholder/user.png';
		}

		// Continue with default K2 avatar determination
		if ($userID == 'alias')
		{
			$avatar = JURI::root(true).'/'.$avatarPath;
		}
		else if ($userID == 0)
		{
			if ($params->get('gravatar') && !is_null($email))
			{
				$avatar = 'https://secure.gravatar.com/avatar/'.md5($email).'?s='.$width.'&amp;default='.urlencode(JURI::root().$avatarPath);
			}
			else
			{
				$avatar = JURI::root(true).'/'.$avatarPath;
			}
		}
		else if (is_numeric($userID) && $userID > 0)
		{
			K2Model::addIncludePath(JPATH_SITE.DS.'components'.DS.'com_k2'.DS.'models');
			$model = K2Model::getInstance('Item', 'K2Model');
			$profile = $model->getUserProfile($userID);
			$avatar = (is_null($profile)) ? '' : $profile->image;
			if (empty($avatar))
			{
				if ($params->get('gravatar') && !is_null($email))
				{
					$avatar = 'https://secure.gravatar.com/avatar/'.md5($email).'?s='.$width.'&amp;default='.urlencode(JURI::root().$avatarPath);
				}
				else
				{
					$avatar = JURI::root(true).'/'.$avatarPath;
				}
			}
			else
			{
				$avatar = JURI::root(true).'/media/k2/users/'.$avatar;
			}

		}

		if (!$params->get('userImageDefault') && $avatar == JURI::root(true).'/'.$avatarPath)
		{
			$avatar = '';
		}

		return $avatar;
	}

	public static function getCategoryImage($image, $params)
	{

		jimport('joomla.filesystem.file');
		$mainframe = JFactory::getApplication();
		$categoryImage = NULL;
		if (!empty($image))
		{
			$categoryImage = JURI::root(true).'/media/k2/categories/'.$image;
		}
		else
		{
			if ($params->get('catImageDefault'))
			{
				if (JFile::exists(JPATH_SITE.DS.'templates'.DS.$mainframe->getTemplate().DS.'images'.DS.'placeholder'.DS.'category.png'))
				{
					$categoryImage = JURI::root(true).'/templates/'.$mainframe->getTemplate().'/images/placeholder/category.png';
				}
				else
				{
					$categoryImage = JURI::root(true).'/components/com_k2/images/placeholder/category.png';
				}

			}
		}
		return $categoryImage;
	}

	// Word limit
	public static function wordLimit($str, $limit = 100, $end_char = '&#8230;')
	{
		if (JString::trim($str) == '')
			return $str;

		// always strip tags for text
		$str = strip_tags($str);

		$find = array("/\r|\n/u", "/\t/u", "/\s\s+/u");
		$replace = array(" ", " ", " ");
		$str = preg_replace($find, $replace, $str);

		preg_match('/\s*(?:\S*\s*){'.(int)$limit.'}/u', $str, $matches);
		if (JString::strlen($matches[0]) == JString::strlen($str))
			$end_char = '';
		return JString::rtrim($matches[0]).$end_char;
	}

	// Character limit
	public static function characterLimit($str, $limit = 150, $end_char = '...')
	{
		if (JString::trim($str) == '')
			return $str;

		// always strip tags for text
		$str = strip_tags(JString::trim($str));

		$find = array("/\r|\n/u", "/\t/u", "/\s\s+/u");
		$replace = array(" ", " ", " ");
		$str = preg_replace($find, $replace, $str);

		if (JString::strlen($str) > $limit)
		{
			$str = JString::substr($str, 0, $limit);
			return JString::rtrim($str).$end_char;
		}
		else
		{
			return $str;
		}

	}

	// Cleanup HTML entities
	public static function cleanHtml($text)
	{
		return htmlentities($text, ENT_QUOTES, 'UTF-8');
	}

	// Gender
	public static function writtenBy($gender)
	{
		if (is_null($gender))
			return JText::_('K2_WRITTEN_BY');
		if ($gender == 'm')
			return JText::_('K2_WRITTEN_BY_MALE');
		if ($gender == 'f')
			return JText::_('K2_WRITTEN_BY_FEMALE');
	}

	public static function setDefaultImage(&$item, $view, $params = NULL)
	{
		if ($view == 'item')
		{
			$image = 'image'.$item->params->get('itemImgSize');
			$item->image = $item->$image;

			switch ($item->params->get('itemImgSize'))
			{

				case 'XSmall' :
					$item->imageWidth = $item->params->get('itemImageXS');
					break;

				case 'Small' :
					$item->imageWidth = $item->params->get('itemImageS');
					break;

				case 'Medium' :
					$item->imageWidth = $item->params->get('itemImageM');
					break;

				case 'Large' :
					$item->imageWidth = $item->params->get('itemImageL');
					break;

				case 'XLarge' :
					$item->imageWidth = $item->params->get('itemImageXL');
					break;
			}
		}

		if ($view == 'itemlist')
		{
			$image = 'image'.$params->get($item->itemGroup.'ImgSize');
			$item->image = isset($item->$image) ? $item->$image : '';

			switch ($params->get($item->itemGroup.'ImgSize'))
			{

				case 'XSmall' :
					$item->imageWidth = $item->params->get('itemImageXS');
					break;

				case 'Small' :
					$item->imageWidth = $item->params->get('itemImageS');
					break;

				case 'Medium' :
					$item->imageWidth = $item->params->get('itemImageM');
					break;

				case 'Large' :
					$item->imageWidth = $item->params->get('itemImageL');
					break;

				case 'XLarge' :
					$item->imageWidth = $item->params->get('itemImageXL');
					break;
			}
		}

		if ($view == 'latest')
		{
			$image = 'image'.$params->get('latestItemImageSize');
			$item->image = $item->$image;

			switch ($params->get('latestItemImageSize'))
			{

				case 'XSmall' :
					$item->imageWidth = $item->params->get('itemImageXS');
					break;

				case 'Small' :
					$item->imageWidth = $item->params->get('itemImageS');
					break;

				case 'Medium' :
					$item->imageWidth = $item->params->get('itemImageM');
					break;

				case 'Large' :
					$item->imageWidth = $item->params->get('itemImageL');
					break;

				case 'XLarge' :
					$item->imageWidth = $item->params->get('itemImageXL');
					break;
			}
		}

		if ($view == 'relatedByTag' && $params->get('itemRelatedImageSize'))
		{

			$image = 'image'.$params->get('itemRelatedImageSize');
			$item->image = $item->$image;

			switch ($params->get('itemRelatedImageSize'))
			{

				case 'XSmall' :
					$item->imageWidth = $item->params->get('itemImageXS');
					break;

				case 'Small' :
					$item->imageWidth = $item->params->get('itemImageS');
					break;

				case 'Medium' :
					$item->imageWidth = $item->params->get('itemImageM');
					break;

				case 'Large' :
					$item->imageWidth = $item->params->get('itemImageL');
					break;

				case 'XLarge' :
					$item->imageWidth = $item->params->get('itemImageXL');
					break;
			}
		}

	}

	public static function getParams($option)
	{

		if (K2_JVERSION != '15')
		{
			$application = JFactory::getApplication();
			if ($application->isSite())
			{
				$params = $application->getParams($option);
			}
			else
			{
				$params = JComponentHelper::getParams($option);
			}
		}
		else
		{
			$params = JComponentHelper::getParams($option);
		}
		return $params;

	}

	public static function cleanTags($string, $allowed_tags)
	{
		$allowed_htmltags = array();
		foreach ($allowed_tags as $tag)
		{
			$allowed_htmltags[] .= "<".$tag.">";
		}
		$allowed_htmltags = implode("", $allowed_htmltags);
		$string = strip_tags($string, $allowed_htmltags);
		return $string;
	}

	// Clean HTML Tag Attributes
	// e.g. cleanupAttributes($string,"img,hr,h1,h2,h3,h4","style,width,height,hspace,vspace,border,class,id");
	public static function cleanAttributes($string, $tag_array, $attr_array)
	{
		$attr = implode("|", $attr_array);
		foreach ($tag_array as $tag)
		{
			preg_match_all("#<($tag) .+?>#", $string, $matches, PREG_PATTERN_ORDER);
			foreach ($matches[0] as $match)
			{
				preg_match_all('/('.$attr.')=([\\"\\\']).+?([\\"\\\'])/', $match, $matchesAttr, PREG_PATTERN_ORDER);
				foreach ($matchesAttr[0] as $attrToClean)
				{
					$string = str_replace($attrToClean, '', $string);
					$string = preg_replace('|  +|', ' ', $string);
					$string = str_replace(' >', '>', $string);
				}
			}
		}
		return $string;
	}

	public static function verifyRecaptcha() {

		$params = JComponentHelper::getParams('com_k2');
		$vars = array();
		$vars['secret'] = $params->get('recaptcha_private_key');
		$vars['response'] = $_POST['g-recaptcha-response'];
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, 'https://www.google.com/recaptcha/api/siteverify');
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
		curl_setopt($ch, CURLOPT_POST, true);
		curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($vars, '', '&'));
		$result = curl_exec($ch);
		$info = curl_getinfo($ch);
		curl_close($ch);
		$response = json_decode($result);
		if($result && $info['http_code'] == 200 && is_object($response) && isset($response->success) && $response->success == true)
		{
			return true;
		}
		else
		{
			return false;
		}

	}

} // End Class
