....................................../////.===Shadow-Here===./////................................................ > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < > < ------------------------------------------------------------------------------------------------------------------- /////////////////////////////////////////////////////////////////////////////////////////////////////////////////// RIFF¤ WEBPVP8 ˜ ðÑ *ôô>‘HŸK¥¤"§£±¨àð enü¹%½_F‘åè¿2ºQú³íªú`N¿­3ÿƒügµJžaÿ¯ÿ°~¼ÎùnúîÞÖô•òíôÁÉß®Sm¥Ü/ ‡ó˜f£Ùà<˜„xëJ¢Ù€SO3x<ªÔ©4¿+ç¶A`q@Ì“Úñè™ÍÿJÌ´ª-˜ÆtÊÛL]Ïq*‘Ý”ì#ŸÌÏãY]@ê`¿ /ªfkØB4·®£ó z—Üw¥Pxù–ÞLШKÇN¾AkÙTf½è'‰g gÆv›Øuh~ a˜Z— ïj*á¥t d£“uÒ ¨`K˜¹ßþ]b>˜]_ÏÔ6W—è2r4x•íÖ…"ƒÖNîä!¦å Ú}ýxGøÌ —@ ;ÆÚŠ=ɾ1ý8lªË¥ô ^yf®Œ¢u&2©nÙÇ›ñÂñŒ³ aPo['½»øFùà­+4ê“$!lövlüÞ=;N®3ð‚õ›DÉKòÞ>ÄÍ ¥ˆuߤ#ˆ$6ù™¥îŠ‡y’ÍB¼ çxÛ;X"WL£R÷͝*ó-¶Zu}º.s¸sšXqù–DþÿvªhüïwyŸ ¯é³lÀ:KCûÄ£Ëá\…­ ~—ýóî ¼ûûÜTÓüÇy…ŽÆvc»¾×U ñ¸žþоP÷¦ó:Ò¨¨5;Ð#&#ÖúñläÿÁœ GxÉ­/ñ‡áQðìYÉtÒwŽ¼GÔ´zàÒò ð*ëzƒ•4~H]Ø‹f ñÓÈñ`NåWçs'ÆÏW^ø¹!XžµmQ5ÃËoLœÎ: ÞËÍ¥J ù…î èo£ßPÎñ¶ž8.Œ]ʵ~5›ÙË-ù*8ÙÖß±~ ©¹rÓê‚j¶d¸{^Q'˜±Crß ÚH—#¥¥QlÀ×ëã‡DÜ«èî þ&Çæžî;ŽÏºò6ÒLÃXy&ZŒ'j‚¢Ù€IßÚù+–MGi‰*jE€‘JcÜ ÓÌ EÏÚj]o˜ Þr <¾U ûŪæÍ/šÝH¥˜b”¼ ÁñßX GP›ï2›4WŠÏà×£…íÓk†¦H·ÅíMh–*nó÷à]ÁjCº€b7<ب‹¨5車bp2:Á[UªM„QŒçiNMa#<5›áËó¸HýÊ"…×Éw¹¦ì2º–x<›»a±¸3Weü®FÝ⑱ö–î–³|LPÈ~çð~Çå‡|º kD¢µÏàÆAI %1À% ¹Ò – ”ϝS¦‰4&¶£°à Öý”û_Ò Áw°A«Å€?mÇÛgHÉ/8)á¾ÛìáöŽP í¨PŸNÙµº¦‡§Ùš"ÿ«>+ªÕ`Ê÷‡‚ß Õû˜þãÇ-PÍ.¾XV‘€ dÜ"þ4¹ ±Oú‘©t¥¦FªÄÃÄ•b‚znýu½—#cDs˜ÃiÑOˆñ×QO=*IAÊ,¶ŽZƒ;‡wøXè%EÐk:F±Ú” .Ѽ+Áu&Ç`."pÈÉw o&¿dE6‘’EqTuK@Ì¥ã™À(Êk(h‰,H}RÀIXÛš3µ1©_OqÚÒJAñ$ÊÙÜ;D3çŒ[þùœh¬Ã³™ö6ç†NY".Ú‰ï[ªŸŒ '²Ð öø_¨ÂÉ9u鶳ÒŠõTàîMØ#û¯gN‡bÙ놚X„ö …ÉeüÌ^J ‹€.œ$Æ)βÄeæW#óüßĺŸ€ ÀzwV 9oä»f4V*uB «Ë†¹ì¯žR霓æHXa=&“I4K;¯ç‹h×·"UŠ~<•â•ªVêª&ÍSÃÆÅ?ÔqÎ*mTM ˜›µwêd#[C¡©§‘D<©àb†–ÁœøvH/,í:¯( ²£|4-„Æövv„Yͼ™^Á$ˆ„¢Û[6yB.åH*V¨æ?$=˜Ñ€•î¦ñ·­(VlŸ‘ nÀt8W÷´Bûba?q9ú¶Xƒl«ÿ\ù¶’þòUÐj/õ¢Ìµ³g$ƒÎR!¸»|Oߍë’BhîÚÑ¢ñåŒJ„®„£2Ð3•ô02Nt…!£Í]Ïc½Qÿ?ˆ<&ÃA¾Ú,JˆijÌ#5yz„‰Î|ÊŽ5QÏ:‹ÐaóVÔxW—CpeÏzÐïíçôÿÅ_[hãsÐ_/ŽTÝ?BîˆííV$<¿i>²F¬_Eß¿ †bÊŒº­ÿ®Z H“C}”¬,Mp ý/Bá£w>˜YV°aƒúh+cŠ- r/[%|üUMHäQ°X»|û/@|°¥Ð !BÔ Ç¢Ä©š+Õì D«7ìN¶ŽðÔ " ƶ’ÖçtA‰Û×}{tþz­¾GÍ›k¹OEJR$ Â׃ «ëÁ"oÉôž$oUK(Ä)Ãz³Ê-‹êN[Ò3Œñbï8P 4ƒ×q¢bo|?<ÛX¬òÄÍ°L–±›(™ûG?ýË©ÚÄ–ÂDØÐ_Ç¡ô ¾–ÄÏø ×e8Ë©$ÄF¹Å‹ì[©óìl:F¾f´‹‹Xì²ï®\¬ôùƒ ÿat¥óèÒùHß0äe‚;ü×h:ÆWðHž=Ã8骣"kœ'Y?³}Tûè€>?0l›e1Lòñ„aæKÆw…hÖŠùW…ÈÆÄ0ši·›[pcwËþñiêíY/~-Á5˜!¿†A›™Mÿþ(±“t@â“ö2­´TG5yé]çå僳 .·ÍïçÝ7UÚ±Ð/Nè»,_Ï ùdj7\ï Wì4›„»c¸àešg#ÒÊ⥭áØo5‘?ÌdÝô¯ ¹kzsƒ=´#ëÉK›Ø´±-¥eW?‡çßtòTã…$Ý+qÿ±ƒ÷_3Ô¥í÷:æ–ž<·Ö‡‰Å¢ š‡%Ô—utÌÈìðžgÖÀz²À—ï÷Óîäõ{K'´È÷³yaÏÁjƒô}ž§®æÊydÕÈë5¯èˆõvÕ©ã*çD„ “z„Ó‡^^xÂ3M§A´JG‚öï 3W'ˆ.OvXè¡ÊÕª?5º7†˜(˜Ç¶#çê’¶!ÌdZK§æ 0fãaN]òY³RV ™î$®K2R¨`W!1Ôó\;Ý ýB%qæK•&ÓÈe9È0êI±žeŸß -ú@žQr¦ ö4»M¼Áè¹µmw 9 EÆE_°2ó„ŸXKWÁ×Hóì^´²GѝF©óäR†¦‰ç"V»eØ<3ùd3ÿÚ¤Žú“Gi" —‘_ÙËÎ~Üö¯¥½Î»üŸEÚŽåmÞþí ;ÞólËΦMzA"Âf(´òá;Éï(/7½ûñÌ­cïÕçлþÝz¾-ÍvÑ“pH­–ðÓj$¸Äû¤‚‘ãUBË-n“2åPkS5&‹Â|+g^œ®Ì͆d!OïäîU«c;{Û!ÅŽ«ëZ9Ókóˆ]¯ƒ›né `ÇÒ+tÆš (ØKá¾—=3œ®•vuMñg²\ï Ec€ 05±d™‡×iÇ×›UúvÌ¢£Èþ¡ÕØô¶ßÎA"ß±#Ö²ˆÊŸ¦*Ä~ij|àø.-¼'»Ú¥£h ofº¦‡VsR=N½„Î v˜Z*SÌ{=jÑB‹tê…;’HžH¯8–îDù8ñ¢|Q•bÛçš–‹m³“ê¨ åÏ^m¬Žãþ©ïêO‡½6] µÆ„Ooòü ²x}N¦Ë3ïé¿»€›HA˜m%çÞ/¿í7Fø“‹léUk)É°Œµ8Q8›:ÀŠeT*šõ~ôڝG6 ¢}`ùH­–”¡k ‰P1>š†®9z11!X wKfmÁ¦xÑ,N1Q”–æB¶M…ÒÃv6SMˆhU¬ÊPŽï‘öj=·CŒ¯u¹ƒVIЃsx4’ömÛýc塶7ßŠß 57^\wÒÐÆ k§h,Œý î«q^R½3]J¸ÇðN ‚çU¬ôº^Áì} ³f©Õœ§ˆã:FÄÈ‚é(€™?àýÓüè1Gô£¼éj‚OÅñ  #>×—ßtà 0G¥Åa뀐kßhc™À_ÉñÞ#±)GD" YîäË-ÿÙ̪ ¹™a¯´¢E\ÝÒö‚;™„ë]_ p8‰o¡ñ+^÷ 3‘'dT4œŽ ðVë½° :¬víÑ«£tßÚS-3¶“þ2 †üüʨòrš¹M{É_¤`Û¨0ìjœøJ‡:÷ÃáZ˜†@GP&œÑDGÏs¡þ¦þDGú‘1Yá9Ôþ¼ ûø…§÷8&–ÜÑnÄ_m®^üÆ`;ÉVÁJ£?â€-ßê}suÍ2sõA NÌúA磸‘îÿÚ»ƒìö·á¿±tÑÐ"Tÿü˜[@/äj¬€uüªìù¥Ý˜á8Ý´sõj 8@rˆð äþZÇD®ÿUÏ2ùôõrBzÆÏÞž>Ì™xœ“ wiÎ×7_… ¸ \#€MɁV¶¥üÕÿPÔ9Z‡ø§É8#H:ƒ5ÀÝå9ÍIŒ5åKÙŠ÷qÄ>1AÈøžj"µÂд/ªnÀ qªã}"iŸBå˜ÓÛŽ¦…&ݧ;G@—³b¯“•"´4í¨ôM¨åñC‹ïùÉó¯ÓsSH2Ý@ßáM‡ˆKÀªÛUeø/4\gnm¥‹ŸŒ qÄ b9ÞwÒNÏ_4Ég³ú=܆‚´ •â¥õeíþkjz>éÚyU«Íӝ݃6"8/ø{=Ô¢»G¥ äUw°W«,ô—¿ãㆅү¢³xŠUû™yŒ (øSópÐ 9\åTâ»—*oG$/×ÍT†Y¿1¤Þ¢_‡ ¼ „±ÍçèSaÓ 3ÛMÁBkxs‰’R/¡¤ˆÙçª(*õ„üXÌ´ƒ E§´¬EF"Ù”R/ÐNyÆÂ^°?™6¡œïJ·±$§?º>ÖüœcNÌù¯G ‹ñ2ŠBB„^·úìaz¨k:#¨Æ¨8LÎõލ£^§S&cŒÐU€ü(‡F±Š¼&P>8ÙÁ ‰ p5?0ÊƃZl¸aô š¼¡}gÿ¶zÆC²¹¬ÎÖG*HB¡O<º2#ñŒAƒ–¡B˜´É$¥›É:FÀÔx¾u?XÜÏÓvN©RS{2ʈãk9rmP¼Qq̳ è¼ÐFׄ^¡Öì fE“F4A…!ì/…¦Lƒ… … $%´¾yã@CI¬ á—3PþBÏNÿ<ý°4Ü ËÃ#ØÍ~âW«rEñw‹eùMMHß²`¬Öó½íf³:‹k˜¯÷}Z!ã¿<¥,\#öµÀ¯aÒNÆIé,Ћ–lŽ#Àæ9ÀÒS·I’½-Ïp Äz¤Š Â* ­íÄ9­< h>׍3ZkËU¹§˜ŒŠ±f­’¤º³Q ÏB?‹#µíÃ¥®@(Gs«†vI¥Mµ‹Á©e~2ú³ÁP4ìÕi‚²Ê^ö@-DþÓàlÜOÍ]n"µã:žpsŽ¢:! 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Directory :  /var/www/web032/htdocs/cms/plugins/system/nnframework/helpers/

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Current File : /var/www/web032/htdocs/cms/plugins/system/nnframework/helpers/protect.php
<?php
/**
 * @package         NoNumber Framework
 * @version         16.1.24082
 * 
 * @author          Peter van Westen <peter@nonumber.nl>
 * @link            http://www.nonumber.nl
 * @copyright       Copyright © 2016 NoNumber All Rights Reserved
 * @license         http://www.gnu.org/licenses/gpl-2.0.html GNU/GPL
 */

defined('_JEXEC') or die;

require_once __DIR__ . '/cache.php';
require_once __DIR__ . '/text.php';

class NNProtect
{
	static $protect_a = '<!-- >> NN_PROTECTED >>';
	static $protect_b = ' << NN_PROTECTED << -->';
	static $protect_tags_a = '<!-- >> NN_PROTECTED_TAGS >>';
	static $protect_tags_b = ' << NN_PROTECTED_TAGS << -->';
	static $sourcerer_tag = null;

	/**
	 * check if page should be protected for certain extensions
	 */
	public static function isProtectedPage($extension_alias = '', $hastags = 0, $exclude_formats = array('pdf'))
	{
		// return if disabled via url
		if (($extension_alias && JFactory::getApplication()->input->get('disable_' . $extension_alias)))
		{
			return true;
		}

		$hash = md5('isProtectedPage_' . $hastags . '_' . json_encode($exclude_formats));

		if (NNCache::has($hash))
		{
			return NNCache::get($hash);
		}

		// return if current page is pdf format
		// return if current page is an image
		// return if current page is NoNumber QuickPage
		// return if current page is a JoomFish or Josetta page
		$isprotected = (
			in_array(JFactory::getApplication()->input->get('format'), $exclude_formats)
			|| in_array(JFactory::getApplication()->input->get('view'), array('image', 'img'))
			|| in_array(JFactory::getApplication()->input->get('type'), array('image', 'img'))
			|| ($hastags
				&& (
					JFactory::getApplication()->input->getInt('nn_qp', 0)
					|| in_array(JFactory::getApplication()->input->get('option'), array('com_joomfishplus', 'com_josetta'))
				)
			)
			|| (JFactory::getApplication()->isAdmin()
				&& in_array(JFactory::getApplication()->input->get('option'), array('com_jdownloads'))
			)
		);

		return NNCache::set(
			$hash,
			$isprotected
		);
	}

	/**
	 * check if page is an admin page
	 */
	public static function isAdmin($block_login = 0)
	{
		$app = JFactory::getApplication();

		return (
			$app->isAdmin()
			&& (!$block_login || $app->input->get('option') != 'com_login')
			&& $app->input->get('task') != 'preview'
			&& !(
				$app->input->get('option') == 'com_finder'
				&& $app->input->get('format') == 'json'
			)
		);
	}

	/**
	 * check if page is an edit page
	 */
	public static function isEditPage()
	{
		$hash = md5('isEditPage');

		if (NNCache::has($hash))
		{
			return NNCache::get($hash);
		}

		$app = JFactory::getApplication();

		$option = $app->input->get('option');
		// always return false for these components
		if (in_array($option, array('com_rsevents', 'com_rseventspro')))
		{
			return NNCache::set(
				$hash,
				false
			);
		}

		$task = $app->input->get('task');
		if (strpos($task, '.') !== false)
		{
			$task = explode('.', $task);
			$task = array_pop($task);
		}

		$view = $app->input->get('view');
		if (strpos($view, '.') !== false)
		{
			$view = explode('.', $view);
			$view = array_pop($view);
		}

		$isedit = (
			in_array($task, array('edit', 'form', 'submission'))
			|| in_array($view, array('edit', 'form'))
			|| in_array($app->input->get('do'), array('edit', 'form'))
			|| in_array($app->input->get('layout'), array('edit', 'form', 'write'))
			|| in_array($app->input->get('option'), array('com_contentsubmit', 'com_cckjseblod'))
			|| ($app->input->get('option') == 'com_comprofiler' && in_array($task, array('', 'userdetails')))
			|| NNProtect::isAdmin()
		);

		return NNCache::set(
			$hash,
			$isedit
		);
	}

	/**
	 * Check if the component is installed
	 *
	 * @return bool
	 */
	public static function isComponentInstalled($extension_alias)
	{
		jimport('joomla.filesystem.file');

		return JFile::exists(JPATH_ADMINISTRATOR . '/components/com_' . $extension_alias . '/' . $extension_alias . '.php');
	}

	/**
	 * Check if the component is installed
	 *
	 * @return bool
	 */
	public static function isSystemPluginInstalled($extension_alias)
	{
		jimport('joomla.filesystem.file');

		return JFile::exists(JPATH_PLUGINS . '/system/' . $extension_alias . '/' . $extension_alias . '.php');
	}

	/**
	 * the regular expression to mach the edit form
	 */
	public static function getFormRegex($regex_format = 0)
	{
		$regex = '(<' . 'form\s[^>]*((id|name)="(adminForm|postform|submissionForm|default_action_user)|action="[^"]*option=com_myjspace&(amp;)?view=see)")';

		if (!$regex_format)
		{
			return $regex;
		}

		return '#' . $regex . '#si';
	}

	/**
	 * protect all text based form fields
	 */
	public static function protectFields(&$string)
	{
		if (strpos($string, '<input') === false && strpos($string, '<textarea') === false)
		{
			return;
		}

		$param_name  = '[a-z][a-z0-9-_]*';
		$params      = '(?:\s+' . $param_name . '(?:\s*=\s*(?:"[^"]*"|\'[^\']*\'|[0-9]+))?)*';
		$type_values = '(?:text|email|hidden)';
		$param_type  = '\s+type\s*=\s*(?:"' . $type_values . '"|\'' . $type_values . '\'])';

		self::protectByRegex(
			$string,
			'#(?:(?:'
			. '(?:<' . 'input' . $params . $param_type . $params . '\s*/?>)'
			. '|(?:<' . 'textarea[\s>].*?</textarea>)'
			. ')\s*)+#si'
		);
	}

	/**
	 * protect all text based form fields
	 */
	public static function protectScripts(&$string)
	{
		if (strpos($string, '</script>') === false)
		{
			return;
		}

		self::protectByRegex(
			$string,
			'#<script[\s>].*?</script>#si'
		);
	}

	/**
	 * protect all html tags with some type of attributes/content
	 */
	public static function protectHtmlTags(&$string)
	{
		self::protectByRegex($string, '#<[a-z][^>]*(="[^"]*"|=\'[^\']*\')+[^>]*>#si');
	}

	/**
	 * protect text by given regex
	 */
	private static function protectByRegex(&$string, $regex)
	{
		preg_match_all($regex, $string, $matches);

		if (empty($matches))
		{
			return;
		}

		$matches      = array_unique($matches['0']);
		$replacements = array();

		foreach ($matches as $match)
		{
			$replacements[] = self::protectString($match);
		}

		$string = str_replace($matches, $replacements, $string);
	}

	/**
	 * protect given plugin style tags
	 */
	public static function protectTags(&$string, $tags = array(), $include_closing_tags = true)
	{
		list($tags, $protected) = self::prepareTags($tags, $include_closing_tags);

		$string = str_replace($tags, $protected, $string);
	}

	/**
	 * replace any protected tags to original
	 */
	public static function unprotectTags(&$string, $tags = array(), $include_closing_tags = true)
	{
		list($tags, $protected) = self::prepareTags($tags, $include_closing_tags);

		$string = str_replace($protected, $tags, $string);
	}

	/**
	 * protect array of strings
	 */
	public static function protectInString(&$string, $unprotected = array(), $protected = array())
	{
		$protected = empty($protected) ? self::protectArray($unprotected) : $protected;

		$string = str_replace($unprotected, $protected, $string);
	}

	/**
	 * replace any protected tags to original
	 */
	public static function unprotectInString(&$string, $unprotected = array(), $protected = array())
	{
		$protected = empty($protected) ? self::protectArray($unprotected) : $protected;

		$string = str_replace($protected, $unprotected, $string);
	}

	private static function getSourcererTag()
	{
		if (isset(self::$sourcerer_tag))
		{
			return self::$sourcerer_tag;
		}

		require_once __DIR__ . '/parameters.php';
		$params              = NNParameters::getInstance()->getPluginParams('sourcerer');
		self::$sourcerer_tag = isset($params->syntax_word) ? $params->syntax_word : '';

		return self::$sourcerer_tag;
	}

	/**
	 * protect all Sourcerer blocks
	 */
	public static function protectSourcerer(&$string)
	{
		if (self::getSourcererTag())
		{
			return;
		}

		if (strpos($string, '{/' . self::$sourcerer_tag . '}') === false)
		{
			return;
		}

		$regex = '#' . preg_quote('{' . self::$sourcerer_tag, '#') . '[\s\}].*?' . preg_quote('{/' . self::$sourcerer_tag . '}', '#') . '#si';

		preg_match_all($regex, $string, $matches);

		if (empty($matches))
		{
			return;
		}

		$matches = array_unique($matches['0']);

		foreach ($matches as $match)
		{
			$string = str_replace($match, self::protectString($match), $string);
		}
	}

	/**
	 * protect complete adminForm
	 */
	public static function protectForm(&$string, $tags = array(), $include_closing_tags = true)
	{
		if (!self::isEditPage())
		{
			return;
		}

		list($tags, $protected_tags) = self::prepareTags($tags, $include_closing_tags);

		$string = preg_replace(self::getFormRegex(1), '<!-- TMP_START_EDITOR -->\1', $string);
		$string = explode('<!-- TMP_START_EDITOR -->', $string);

		foreach ($string as $i => &$string_part)
		{
			if (empty($string_part) || !fmod($i, 2))
			{
				continue;
			}

			self::protectFormPart($string_part, $tags, $protected_tags);
		}

		$string = implode('', $string);
	}

	private static function protectFormPart(&$string, $tags = array(), $protected_tags = array())
	{
		if (strpos($string, '</form>') === false)
		{
			return;
		}

		// Protect entire form
		if (empty($tags))
		{
			$form_parts      = explode('</form>', $string, 2);
			$form_parts['0'] = self::protectString($form_parts['0'] . '</form>');
			$string          = implode('', $form_parts);

			return;
		}

		if (!preg_match('#(?:' . implode('|', $tags) . ')#si', $string))
		{
			return;
		}

		$form_parts = explode('</form>', $string, 2);
		// protect tags only inside form fields
		preg_match_all('#(?:<textarea[^>]*>.*?<\/textarea>|<input[^>]*>)#si', $form_parts['0'], $matches);

		if (empty($matches))
		{
			return;
		}

		$matches = array_unique($matches['0']);

		foreach ($matches as $match)
		{
			$field           = str_replace($tags, $protected_tags, $match);
			$form_parts['0'] = str_replace($match, $field, $form_parts['0']);
		}

		$string = implode('</form>', $form_parts);
	}

	/**
	 * replace any protected text to original
	 */
	public static function unprotect(&$string)
	{
		$regex = '#' . preg_quote(self::$protect_a, '#') . '(.*?)' . preg_quote(self::$protect_b, '#') . '#si';
		while (preg_match_all($regex, $string, $matches, PREG_SET_ORDER))
		{
			foreach ($matches as $match)
			{
				$string = str_replace($match['0'], base64_decode($match['1']), $string);
			}
		}
	}

	/**
	 * prepare the tags and protected tags array
	 */
	private static function prepareTags($tags, $include_closing_tags = true)
	{
		if (!is_array($tags))
		{
			$tags = array($tags);
		}

		$hash = md5('prepareTags_' . json_encode($tags) . '_' . $include_closing_tags);

		if (NNCache::has($hash))
		{
			return NNCache::get($hash);
		}

		foreach ($tags as $i => $tag)
		{
			if (!NNText::is_alphanumeric($tag['0']))
			{
				continue;
			}

			$tags[$i] = '{' . $tag;

			if ($include_closing_tags)
			{
				$tags[] = '{/' . $tag;
			}
		}

		return NNCache::set(
			$hash,
			array($tags, self::protectArray($tags, 1))
		);
	}

	/**
	 * encode string
	 */
	public static function protectString($string, $is_tag = 0)
	{
		if ($is_tag)
		{
			return self::$protect_tags_a . base64_encode($string) . self::$protect_tags_b;
		}

		return self::$protect_a . base64_encode($string) . self::$protect_b;
	}

	/**
	 * decode string
	 */
	public static function unprotectString($string, $is_tag = 0)
	{
		if ($is_tag)
		{
			return self::$protect_tags_a . base64_decode($string) . self::$protect_tags_b;
		}

		return self::$protect_a . base64_decode($string) . self::$protect_b;
	}

	/**
	 * encode tag string
	 */
	public static function protectTag($string)
	{
		return self::protectString($string, 1);
	}

	/**
	 * encode array of strings
	 */
	public static function protectArray($array, $is_tag = 0)
	{
		foreach ($array as &$string)
		{
			$string = self::protectString($string, $is_tag);
		}

		return $array;
	}

	/**
	 * decode array of strings
	 */
	public static function unprotectArray($array, $is_tag = 0)
	{
		foreach ($array as &$string)
		{
			$string = self::unprotectString($string, $is_tag);
		}

		return $array;
	}

	/**
	 * replace any protected tags to original
	 */
	public static function unprotectForm(&$string, $tags = array())
	{
		// Protect entire form
		if (empty($tags))
		{
			NNProtect::unprotect($string);

			return;
		}

		NNProtect::unprotectTags($string, $tags);
	}

	/**
	 * remove inline comments in scrips and styles
	 */
	public static function removeInlineComments(&$string, $name)
	{
		$string = preg_replace('#\s*/\* (START|END): ' . $name . ' [a-z]* \*/\s*#s', "\n", $string);
	}

	/**
	 * remove tags from title tags
	 */
	public static function removeFromHtmlTagContent(&$string, $tags, $include_closing_tags = true, $html_tags = array('title'))
	{
		list($tags, $protected) = self::prepareTags($tags, $include_closing_tags);

		if (!is_array($html_tags))
		{
			$html_tags = array($html_tags);
		}

		preg_match_all('#(<(' . implode('|', $html_tags) . ')(?:\s[^>]*?)>)(.*?)(</\2>)#si', $string, $matches, PREG_SET_ORDER);

		if (empty($matches))
		{
			return;
		}

		foreach ($matches as $match)
		{
			$content = $match['3'];
			foreach ($tags as $tag)
			{
				$content = preg_replace('#' . preg_quote($tag, '#') . '.*?\}#si', '', $content);
			}
			$string = str_replace($match['0'], $match['1'] . $content . $match['4'], $string);
		}
	}

	/**
	 * remove tags from tag attributes
	 */
	public static function removeFromHtmlTagAttributes(&$string, $tags, $attributes = array('title', 'alt'), $include_closing_tags = true)
	{
		list($tags, $protected) = self::prepareTags($tags, $include_closing_tags);

		if (!is_array($attributes))
		{
			$attributes = array($attributes);
		}

		preg_match_all('#\s(?:' . implode('|', $attributes) . ')\s*=\s*".*?"#si', $string, $matches);

		if (empty($matches))
		{
			return;
		}

		$matches = array_unique($matches['0']);

		foreach ($matches as $match)
		{
			$title = $match;
			foreach ($tags as $tag)
			{
				$title = preg_replace('#' . preg_quote($tag, '#') . '.*?\}#si', '', $title);
			}
			$string = str_replace($match, $title, $string);
		}
	}

	/**
	 * Check if article passes security levels
	 */
	static function articlePassesSecurity(&$article, $securtiy_levels = array())
	{
		if (!isset($article->created_by))
		{
			return true;
		}

		if (empty($securtiy_levels))
		{
			return true;
		}

		if (is_string($securtiy_levels))
		{
			$securtiy_levels = array($securtiy_levels);
		}

		if (
			!is_array($securtiy_levels)
			|| in_array('-1', $securtiy_levels)
		)
		{
			return true;
		}

		// Lookup group level of creator
		$user_groups = new JAccess;
		$user_groups = $user_groups->getGroupsByUser($article->created_by);

		// Return true if any of the security levels are found in the users groups
		return count(array_intersect($user_groups, $securtiy_levels));
	}

	/**
	 * Place an error in the message queue
	 */
	static function throwError($error)
	{
		// Return if page is not an admin page or the admin login page
		if (
			!JFactory::getApplication()->isAdmin()
			|| JFactory::getUser()->get('guest')
		)
		{
			return;
		}

		// Check if message is not already in queue
		$messagequeue = JFactory::getApplication()->getMessageQueue();
		foreach ($messagequeue as $message)
		{
			if ($message['message'] == $error)
			{
				return;
			}
		}

		JFactory::getApplication()->enqueueMessage($error, 'error');
	}

	public static function isJoomla3()
	{
		return true;
	}
}

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