<?php if(!defined('IN_GS')){ die('you cannot load this page directly.'); }
/**
 * Basic Functions 
 *
 * These functions are used throughout the installation of GetSimple.
 *
 * @package GetSimple
 * @subpackage Basic-Functions
 */

/**
 * Clean URL
 *
 * @since 1.0
 *
 * @param string $text
 * @return string
 */
function clean_url($text)  { 
	$text = strip_tags(lowercase($text)); 
	$code_entities_match = array(' ?',' ','--','&quot;','!','@','#','$','%','^','&','*','(',')','+','{','}','|',':','"','<','>','?','[',']','\\',';',"'",',','/','*','+','~','`','=','.'); 
	$code_entities_replace = array('','-','-','','','','','','','','','','','','','','','','','','','','','','','',''); 
	$text = str_replace($code_entities_match, $code_entities_replace, $text); 
	$text = urlencode($text);
	$text = str_replace('--','-',$text);
	$text = rtrim($text, "-");
	return $text; 
} 

/**
 * Clean Image Name
 *
 * Mirror image of Clean URL, but it allows periods so file extentions still work
 *
 * @since 2.0
 *
 * @param string $text
 * @return string
 */
function clean_img_name($text)  { 
	$text = strip_tags(lowercase($text)); 
	$code_entities_match = array(' ?',' ','--','&quot;','!','#','$','%','^','&','*','(',')','+','{','}','|',':','"','<','>','?','[',']','\\',';',"'",',','/','*','+','~','`','='); 
	$code_entities_replace = array('','-','-','','','','','','','','','','','','','','','','','','','','','',''); 
	$text = str_replace($code_entities_match, $code_entities_replace, $text); 
	$text = urlencode($text);
	$text = str_replace('--','-',$text);
	$text = str_replace('%40','@',$text); // ensure @ is not encoded
	$text = rtrim($text, "-");
	return $text; 
} 

/**
 * 7bit Text Converter
 *
 * Converts a string to a different encoding format
 *
 * @since 1.0
 *
 * @param string $text
 * @param string $from_enc
 * @return string 
 */
function to7bit($text,$from_enc="UTF-8") {
	if (function_exists('mb_convert_encoding')) {
   		$text = mb_convert_encoding($text,'HTML-ENTITIES',$from_enc);
    } else {
		$text = htmlspecialchars_decode(utf8_decode(htmlentities($text, ENT_COMPAT, 'utf-8', false)));
	}
    $text = preg_replace(
        array('/&szlig;/','/&(..)lig;/',
             '/&([aouAOU])uml;/','/&(.)[^;]*;/'),
        array('ss',"$1","$1".'e',"$1"),
        $text);
    return $text;
}


/**
 * Formats Email to HTML Style
 *
 * @since 3.1
 *
 * @param string $message
 * @return string
 */
function email_template($message) {
	$data = '
	<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
	<html xmlns="http://www.w3.org/1999/xhtml">
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" >
	<style>
	 table td p {margin-bottom:15px;}
	 a img {border:none;}
	</style>
	</head>
	<body style="padding:0;margin:0;background: #f3f3f3;font-family:arial, \'helvetica neue\', helvetica, serif" >
	<table cellpadding="0" cellspacing="0" border="0" align="center" width="100%" style="padding: 0 0 35px 0; background: #f3f3f3;">
  	<tr>
	    <td align="center" style="margin: 0; padding: 0;">
	      <center>
	        <table border="0" cellpadding="0" cellspacing="0" width="580" style="border-radius:3px;">
						<tr>
							<th style="padding:15px 0 15px 20px;text-align:left;vertical-align:top;background:#171E25;border-radius:4px 4px 0 0;" >
								<a href="http://get-simple.info/"><img src="http://get-simple.info/GSSW/gssw_assets/images/logo.png" alt="GetSimple CMS"></a>
							</th>
						</tr>
						<tr>
							<td style="background:#fff;border-bottom:1px solid #e1e1e1;border-right:1px solid #e1e1e1;border-left:1px solid #e1e1e1;font-size:13px;font-family:arial, helvetica, sans-serif;padding:20px;line-height:22px;" >
								'.$message.'
							</td>
						</tr>
						<tr>
							<td style="padding-top:10px;font-size:10px;color:#aaa;line-height:14px;font-family:arial, \'helvetica neue\', helvetica, serif" >
								<p class="meta">This is a system-generated email, please do not reply to it. For help or questions about GetSimple, please visit our <a href="http://get-simple.info/" style="color:#aaa;" >website</a>.<br />&copy; '.date('Y').' GetSimple CMS. All Rights Reserved.&nbsp;<a href="http://get-simple.info/start/privacy" style="color:#aaa;" >Privacy Policy</a>. </p>
							</td>
						</tr>
					</table>
				</center>
			</td>
		</tr>
	</table>
	</body>
	</html>
	';
	return $data;
}


/**
 * Send Email
 *
 * @since 1.0
 * @uses GSFROMEMAIL
 * @uses $EMAIL
 *
 * @param string $to
 * @param string $subject
 * @param string $message
 * @return string
 */
function sendmail($to,$subject,$message) {
	
	$message = email_template($message);

	if (defined('GSFROMEMAIL')){
		$fromemail = GSFROMEMAIL; 
	} else {
		if(!empty($_SERVER['SERVER_ADMIN']) && check_email_address($_SERVER['SERVER_ADMIN'])) $fromemail = $_SERVER['SERVER_ADMIN'];
		else $fromemail =  'noreply@'.$_SERVER['SERVER_NAME'];
	}

	global $EMAIL;
	$headers  ='"MIME-Version: 1.0' . PHP_EOL;
	$headers .= 'Content-Type: text/html; charset=UTF-8' . PHP_EOL;
	$headers .= 'From: '.$fromemail . PHP_EOL;
  	$headers .= 'Reply-To: '.$fromemail . PHP_EOL;
  	$headers .= 'Return-Path: '.$fromemail . PHP_EOL;
	
	if( @mail($to,'=?UTF-8?B?'.base64_encode($subject).'?=',"$message",$headers) ) {
		return 'success';
	} else {
		return 'error';
	}
}

/**
 * Sub-Array Sort
 *
 * Sorts the passed array by a subkey
 *
 * @since 1.0
 *
 * @param array $a
 * @param string $subkey Key within the array passed you want to sort by
 * @param string $order - order 'asc' ascending or 'desc' descending
 * @param bool $natural - sort using a "natural order" algorithm
 * @return array
 */
function subval_sort($a,$subkey, $order='asc',$natural = true) {
	if (count($a) != 0 || (!empty($a))) { 
		foreach($a as $k=>$v) {
			if(isset($v[$subkey])) $b[$k] = lowercase($v[$subkey]);
		}

		if(!isset($b)) return $a;

		if($natural){
			natsort($b);
			if($order=='desc') $b = array_reverse($b,true);	
		} 
		else {
			($order=='asc')? asort($b) : arsort($b);
		}
		
		foreach($b as $key=>$val) {
			$c[] = $a[$key];
		}

		return $c;
	}
}

/**
 * SimpleXMLExtended Class
 *
 * Extends the default PHP SimpleXMLElement class by 
 * allowing the addition of cdata
 *
 * @since 1.0
 *
 * @param string $cdata_text
 */
class SimpleXMLExtended extends SimpleXMLElement{   
  public function addCData($cdata_text){   
   $node= dom_import_simplexml($this);   
   $no = $node->ownerDocument;   
   $node->appendChild($no->createCDATASection($cdata_text));   
  } 
} 

/**
 * Is File
 *
 * @since 1.0
 * @uses tsl
 *
 * @param string $file
 * @param string $path
 * @param string $type Optiona, default is 'xml'
 * @return bool
 */
function isFile($file, $path, $type = 'xml') {
	if( is_file(tsl($path) . $file) && $file != "." && $file != ".." && (strstr($file, $type))  ) {
		return true;
	} else {
		return false;
	}
}

/**
 * Get Files
 *
 * Returns an array of files from the passed path
 *
 * @since 1.0
 *
 * @param string $path
 * @return array
 */
function getFiles($path) {
	$handle = opendir($path) or die("getFiles: Unable to open $path");
	$file_arr = array();
	while ($file = readdir($handle)) {
		if ($file != '.' && $file != '..') {
			$file_arr[] = $file;
		}
	}
	closedir($handle);
	return $file_arr;
}

$microtime_start = null;

function get_execution_time($reset=false)
{
	GLOBAL $microtime_start;
    if($reset) $microtime_start = null;
		
    if($microtime_start === null)
    {
        $microtime_start = microtime(true);
        return 0.0; 
    }    
    return round(microtime(true) - $microtime_start,5); 
}

/**
 * Get XML Data
 *
 * Turns the XML file into an object 
 *
 * @since 1.0
 *
 * @param string $file
 * @return object
 */
function getXML($file) {
	$xml = @file_get_contents($file);
	if($xml){
		$data = simplexml_load_string($xml, 'SimpleXMLExtended', LIBXML_NOCDATA); 
		return $data;
	}	
}

/**
 * XML Save
 *
 * @since 2.0
 * @todo create and chmod file before ->asXML call (if it doesnt exist already, if so, then just chmod it.)
 *
 * @param object $xml
 * @param string $file Filename that it will be saved as
 * @return bool
 */
function XMLsave($xml, $file) {
	# get_execution_time(true);
	if(!is_object($xml)) return false;
	$success = @$xml->asXML($file) === TRUE;
	# debugLog('XMLsave: ' . $file . ' ' . get_execution_time());	
	
	if (defined('GSCHMOD')) {
		return $success && chmod($file, GSCHMOD);
	} else {
		return $success && chmod($file, 0755);
	}
}

/**
 * Long Date Output
 *
 * @since 1.0
 * @uses $i18n
 * @uses i18n_r
 *
 * @param string $dt Date/Time format, default is $i18n['DATE_AND_TIME_FORMAT']
 * @return string
 */
function lngDate($dt) {
	global $i18n;
	
	if (!$dt) {
		$data = date(i18n_r('DATE_AND_TIME_FORMAT'));
	} else {
		$data = date(i18n_r('DATE_AND_TIME_FORMAT'), strtotime($dt));
	}
	return $data;
}

/**
 * Short Date Output
 *
 * @since 1.0
 * @uses $i18n
 * @uses i18n_r
 *
 * @param string $dt Date/Time format, default is $i18n['DATE_FORMAT']
 * @return string
 */
function shtDate($dt) {
	global $i18n;
	
	if (!$dt) {
		$data = date(i18n_r('DATE_FORMAT'));
	} else {
		$data = date(i18n_r('DATE_FORMAT'), strtotime($dt));
	}
	return $data;
}

/**
 * Clean Utility
 *
 * @since 1.0
 *
 * @param string $data
 * @return string
 */
function cl($data){
	$data = stripslashes(strip_tags(html_entity_decode($data, ENT_QUOTES, 'UTF-8')));
	//$data = preg_replace('/[[:cntrl:]]/', '', $data); //remove control characters that cause interface to choke
	return $data;
}

/**
 * Add Trailing Slash
 *
 * @since 1.0
 *
 * @param string $path
 * @return string
 */
function tsl($path) {
	if( substr($path, strlen($path) - 1) != '/' ) {
		$path .= '/';
	}
	return $path;
}

/**
 * Case-Insensitve In-Array
 *
 * Creates a function that PHP should already have, but doesnt
 *
 * @since 1.0
 *
 * @param string $path
 * @return string
 */
if(!function_exists('in_arrayi')) {
	function in_arrayi($needle, $haystack) {
	    return in_array(lowercase($needle), array_map('lowercase', $haystack));
	}
}

/**
 * Creates Standard URL for Pages
 *
 * Default function to create the correct url structure for each front-end page
 *
 * @since 2.0
 * @uses $PRETTYURLS
 * @uses $SITEURL
 * @uses $PERMALINK
 * @uses tsl
 *
 * @param string $slug
 * @param string $parent
 * @param string $type Default is 'full', alternative is 'relative'
 * @return string
 */
function find_url($slug, $parent, $type='full') {
	global $PRETTYURLS;
	global $SITEURL;
	global $PERMALINK;
				
	if ($type == 'full') {
		$full = $SITEURL;
	} elseif($type == 'relative') {
		$s = pathinfo(htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES));
		$full = $s['dirname'] .'/';
		$full = str_replace('//', '/', $full);
	} else {
		$full = '/';
	}
	
	if ($parent != '') {
		$parent = tsl($parent); 
	}	

  if ($PRETTYURLS == '1') {      
    if ($slug != 'index'){  
    	$url = $full . $parent . $slug . '/';
    } else {
    	$url = $full;
    }   
  } else {
		if ($slug != 'index'){ 
    	$url = $full .'index.php?id='.$slug;
    } else {
    	$url = $full;
    }
  }
  
	if (trim($PERMALINK) != '' && $slug != 'index'){
		$plink = str_replace('%parent%/', $parent, $PERMALINK);
		$plink = str_replace('%parent%', $parent, $plink);
		$plink = str_replace('%slug%', $slug, $plink);
		$url = $full . $plink;
	}

	return (string)$url;
}

/**
 * Strip Path
 *
 * Strips all path info from a filepath or basedir
 *
 * @since 2.0
 * @author Martijn van der Ven
 *
 * @param string $path
 * @return string
 */
function strippath($path) {
	$pathparts = pathinfo($path);
	if(isset($pathparts['extension'])) return $pathparts['filename'].'.'.$pathparts['extension'];
	return $pathparts['basename'];
}

/**
 * Strip Quotes
 *
 * @since 2.0
 *
 * @param string $text
 * @return string
 */
function strip_quotes($text)  { 
	$text = strip_tags($text); 
	$code_entities_match = array('"','\'','&quot;'); 
	$text = str_replace($code_entities_match, '', $text); 
	return trim($text); 
}

/**
 * Encode Quotes
 *
 * @since 3.0
 *
 * @param string $text
 * @return string
 */
function encode_quotes($text)  { 
	$text = strip_tags($text);
	if (version_compare(PHP_VERSION, "5.2.3")  >= 0) {	
		$text = htmlspecialchars($text, ENT_QUOTES, 'UTF-8', false);
	} else {	
		$text = htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
	}
	return trim($text); 
} 

/**
 * Redirect URL
 *
 * @since 3.0
 * @author schlex
 *
 * @param string $url
 */
function redirect($url) {
	global $i18n;

	// handle expired sessions for ajax requests
	if(requestIsAjax() && !cookie_check()){
		header('HTTP/1.1 401 Unauthorized', true, 401);
		header('WWW-Authenticate: FormBased');
		die();
	}	

	if (!headers_sent($filename, $linenum)) {
    header('Location: '.$url);
  } else {
    echo "<html><head><title>".i18n_r('REDIRECT')."</title></head><body>";
    if ( !isDebug() ) {
	    echo '<script type="text/javascript">';
	    echo 'window.location.href="'.$url.'";';
	    echo '</script>';
	    echo '<noscript>';
	    echo '<meta http-equiv="refresh" content="0;url='.$url.'" />';
	    echo '</noscript>';
	  }
    echo i18n_r('ERROR').": Headers already sent in ".$filename." on line ".$linenum."\n";
    printf(i18n_r('REDIRECT_MSG'), $url);
		echo "</body></html>";
	}
	
	exit;
}

/**
 * Display i18n
 *
 * Displays the default language's tranlation, but if it 
 * does not exist, it falls back to the en_US one.
 *
 * @since 3.0
 * @author ccagle8
 * @uses GSLANGPATH
 * @uses $i18n
 * @uses $LANG
 *
 * @param string $name
 * @param bool $echo Optional, default is true
 */
function i18n($name, $echo=true) {
	global $i18n;
	global $LANG;

	if(isset($i18n)){

		if (isset($i18n[$name])) {
			$myVar = $i18n[$name];
		} else {
			$myVar = '{'.$name.'}';
		}
	}
	else {
		$myVar = '{'.$name.'}'; // if $i18n doesnt exist yet return something
	}

	if (!$echo) {
		return $myVar;
	} else {
		echo $myVar;
	}
}

/**
 * Return i18n
 *
 * Same as i18n, but returns instead of echos
 *
 * @since 3.0
 * @author ccagle8
 *
 * @param string $name
 */
function i18n_r($name) {
	return i18n($name, false);
}

/**
 * i18n Merge
 *
 * Merges a plugin's language file with the global $i18n language
 * This is the function that plugin developers will call to initiate the language merge
 *
 * @since 3.0
 * @author mvlcek
 * @uses i18n_merge_impl
 * @uses $i18n
 * @uses $LANG
 *
 * @param string $plugin
 * @param string $language, default=null
 * @return bool
 */
function i18n_merge($plugin, $language=null) {
  global $i18n, $LANG;
  return i18n_merge_impl($plugin, $language ? $language : $LANG, $i18n);
}

/**
 * i18n Merge Implementation
 *
 * Does the merging of a plugin's language file with the global $i18n language
 *
 * @since 3.0
 * @author mvlcek
 * @uses GSPLUGINPATH
 *
 * @param string $plugin null if merging in core langs
 * @param string $lang
 * @param string $globali18n
 * @return bool
 */
function i18n_merge_impl($plugin, $lang, &$globali18n) { 

  $i18n = array(); // local from file
  if(!isset($globali18n)) $globali18n = array(); //global ref to $i18n
	
  $path     = ($plugin ? GSPLUGINPATH.$plugin.'/lang/' : GSLANGPATH);
  $filename = $path.$lang.'.php';
  $prefix   = $plugin ? $plugin.'/' : '';

  if (!filepath_is_safe($filename,$path) || !file_exists($filename)) {
    return false;
  }

  include($filename); 
  
  // if core lang and glboal is empty assign
  if(!$plugin && !$globali18n && count($i18n) > 0){
     $globali18n = $i18n;
     return true;
  }

  // replace on per key basis
  if (count($i18n) > 0){
    foreach ($i18n as $code => $text) {
      if (!array_key_exists($prefix.$code, $globali18n)) {
        $globali18n[$prefix.$code] = $text;
      }
    }
  } 
  return true;
}

/**
 * Safe AddSlashes HTML
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param string $text
 * @return string
 */
function safe_slash_html($text) {
	if (get_magic_quotes_gpc()==0) {
		$text = addslashes(htmlspecialchars($text, ENT_QUOTES, 'UTF-8'));
	} else {
		$text = htmlspecialchars($text, ENT_QUOTES, 'UTF-8');
	}
	$text = str_replace(chr(12), '', $text); // FF
	$text = str_replace(chr(3), ' ', $text); // ETX
	return $text;
}


/**
 * Safe StripSlashes HTML Decode
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param string $text
 * @return string
 */
function safe_strip_decode($text) {
	if (get_magic_quotes_gpc()==0) {
		$text = htmlspecialchars_decode($text, ENT_QUOTES);
	} else {
		$text = stripslashes(htmlspecialchars_decode($text, ENT_QUOTES));
	}
	return $text;
}

/**
 * StripSlashes HTML Decode
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param string $text
 * @return string
 */
function strip_decode($text) {
	$text = stripslashes(htmlspecialchars_decode($text, ENT_QUOTES));
	return $text;
}

/**
 * Safe Pathinfo Filename
 *
 * for backwards compatibility for before PHP 5.2
 *
 * @since 3.0
 * @author madvic
 *
 * @param string $file
 * @return string
 */
function pathinfo_filename($file) {
	if (defined('PATHINFO_FILENAME')) return pathinfo($file,PATHINFO_FILENAME);
	$path_parts = pathinfo($file);

	if(isset($path_parts['extension']) && ($file!='..')){
	  return substr($path_parts['basename'],0 ,strlen($path_parts['basename'])-strlen($path_parts['extension'])-1);
	} else{
	  return $path_parts['basename'];
	}
}

/**
 * Suggest Site Path
 *
 * Suggestion function for SITEURL variable
 *
 * @since 2.04
 * @uses $GSAMIN
 * @uses http_protocol
 * @author ccagle8
 *
 * @param bool $parts 
 * @return string
 */
function suggest_site_path($parts=false) {
	global $GSADMIN;
	$protocol = http_protocol();
	$path_parts = pathinfo(htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES));
	$path_parts = str_replace("/".$GSADMIN, "", $path_parts['dirname']);
	$port = ($p=$_SERVER['SERVER_PORT'])!='80'&&$p!='443'?':'.$p:'';
	
	if($path_parts == '/') {
	
		$fullpath = $protocol."://". htmlentities($_SERVER['SERVER_NAME'], ENT_QUOTES) . $port . "/";
	
	} else {
		
		$fullpath = $protocol."://". htmlentities($_SERVER['SERVER_NAME'], ENT_QUOTES) . $port . $path_parts ."/";
		
	}
		
	if ($parts) {
		return $path_parts;
	} else {
		return $fullpath;
	}
}

/**
 * Myself 
 *
 * Returns the page itself 
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param bool $echo
 * @return string
 */
function myself($echo=true) {
	if ($echo) {
		echo htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES);
	} else {
		return htmlentities($_SERVER['PHP_SELF'], ENT_QUOTES);
	}
}

/**
 * Get Available Themes 
 *
 * @since 2.04
 * @uses GSTHEMESPATH
 * @author ccagle8
 *
 * @param string $temp
 * @return array
 */
function get_themes($temp) {
	$themes_path = GSTHEMESPATH . $temp .'/';
	$themes_handle = opendir($themes_path);
	while ($file = readdir($themes_handle))	{
		if( is_file($themes_path . $file) && $file != "." && $file != ".." ) {
			$templates[] = $file;
		}
	}
	sort($templates);	
	return $templates;
}


/**
 * HTML Decode 
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param string $text
 * @return string
 */
function htmldecode($text) {
	return html_entity_decode($text, ENT_QUOTES, 'UTF-8');
}

/**
 * Safe to LowerCase 
 *
 * @since 2.04
 * @author ccagle8
 *
 * @param string $text
 * @return string
 */
function lowercase($text) {
	if (function_exists('mb_strtolower')) {
		$text = mb_strtolower($text, 'UTF-8'); 
	} else {
		$text = strtolower($text); 
	}
	
	return $text;
}

/**
 * Find AccessKey
 *
 * Provides a simple way to find the accesskey defined by translators as
 * accesskeys are language dependent.
 * 
 * @param string $string, text from the i18n array
 * @return string
 */
function find_accesskey($string) {
  $found = array();
  $matched = preg_match('/<em>([a-zA-Z])<\/em>/', $string, $found);
  if ($matched != 1) {
     return null;
	}
  return strtolower($found[1]);
}

/**
 * Clean ID
 *
 * Removes characters that don't work in URLs or IDs
 * 
 * @param string $text
 * @return string
 */
function _id($text) {
	$text = to7bit($text, "UTF-8");
	$text = clean_url($text);
	$text = preg_replace('/[[:cntrl:]]/', '', $text); //remove control characters that cause interface to choke
	return lowercase($text);
}

/**
 * Defined Array
 *
 * Checks an array of PHP constants and verifies they are defined
 * 
 * @param array $constants
 * @return bool
 */
function defined_array($constants) {
	$defined = true;
	foreach ($constants as $constant) {
		if (!defined($constant)) {
			$defined = false;
			break;
		}
	}
	return $defined;
}


/**
 * Is Folder Empty
 *
 * Check to see if a folder is empty or not
 * 
 * @param string $folder
 * @return bool
 */
function check_empty_folder($folder) {
	$files = array ();
	if ( $handle = opendir ( $folder ) ) {
		while ( false !== ( $file = readdir ( $handle ) ) ) {
			if ( $file != "." && $file != ".." ) {
				$files [] = $file;
			}
		}
		closedir ( $handle );
	}
	return ( count ( $files ) > 0 ) ? FALSE : TRUE;
}


/**
 * Folder Items
 *
 * Return the amount of items within the given folder
 * 
 * @param string $folder
 * @return string
 */
function folder_items($folder) {
	$files = array ();
	if ( $handle = opendir ( $folder ) ) {
		while ( false !== ( $file = readdir ( $handle ) ) ) {
			if ( $file != "." && $file != ".." ) {
				$files [] = $file;
			}
		}
		closedir($handle);
	}
	return count($files);
}

/**
 * Validate a URL String
 * 
 * @param string $u
 * @return bool
 */
function validate_url($u) {
	return filter_var($u,FILTER_VALIDATE_URL);
}


/**
 * Format XML to Formatted String
 * 
 * @param string $xml
 * @return string
 */
function formatXmlString($xml) {  
  
  // add marker linefeeds to aid the pretty-tokeniser (adds a linefeed between all tag-end boundaries)
  $xml = preg_replace('/(>)(<)(\/*)/', "$1\n$2$3", $xml);
  
  // now indent the tags
  $token      = strtok($xml, "\n");
  $result     = ''; // holds formatted version as it is built
  $pad        = 0; // initial indent
  $matches    = array(); // returns from preg_matches()
  
  // scan each line and adjust indent based on opening/closing tags
  while ($token !== false) : 
  
    // test for the various tag states
    
    // 1. open and closing tags on same line - no change
    if (preg_match('/.+<\/\w[^>]*>$/', $token, $matches)) : 
      $indent=0;
    // 2. closing tag - outdent now
    elseif (preg_match('/^<\/\w/', $token, $matches)) :
      $pad--;
    // 3. opening tag - don't pad this one, only subsequent tags
    elseif (preg_match('/^<\w[^>]*[^\/]>.*$/', $token, $matches)) :
      $indent=1;
    // 4. no indentation needed
    else :
      $indent = 0; 
    endif;
    
    // pad the line with the required number of leading spaces
    $line    = str_pad($token, strlen($token)+$pad, ' ', STR_PAD_LEFT);
    $result .= $line . "\n"; // add to the cumulative result, with linefeed
    $token   = strtok("\n"); // get the next token
    $pad    += $indent; // update the pad size for subsequent lines    
  endwhile; 
  
  return $result;
}

/**
 * Check Server Protocol
 * 
 * Checks to see if the website should be served using HTTP or HTTPS
 *
 * @since 3.1
 * @return string
 */
function http_protocol() {
	if (!empty($_SERVER['HTTPS']) && $_SERVER['HTTPS'] !== 'off' || $_SERVER['SERVER_PORT'] == 443) {
	  return 'https';
	} else {
		return 'http';
	}
}

/**
 * Get File Mime-Type
 *
 * @since 3.1
 * @param $file, absolute path
 * @return string/bool
 */
function file_mime_type($file) {
	if (!file_exists($file)) {
		return false;
		exit;
	}
	if(function_exists('finfo_open')) {
		# http://www.php.net/manual/en/function.finfo-file.php
		$finfo = finfo_open(FILEINFO_MIME_TYPE);
		$mimetype = finfo_file($finfo, $file);
		finfo_close($finfo);
		
	} elseif(function_exists('mime_content_type')) {
		# Depreciated: http://php.net/manual/en/function.mime-content-type.php
		$mimetype = mime_content_type($file);
	} else {
		return false;
		exit;	
	}
	return $mimetype;
}


/**
 * Check Is FrontEnd
 * 
 * Checks to see if the you are on the frontend or not
 *
 * @since 3.1
 * @return bool
 */
function is_frontend() {
  GLOBAL $base;
	if(isset($base)) {
		return true;
	} else {
		return false;
	}
}

/**
 * Get Installed GetSimple Version
 *
 * This will return the version of GetSimple that is installed
 *
 * @since 1.0
 * @uses GSVERSION
 *
 * @param bool $echo Optional, default is true. False will 'return' value
 * @return string Echos or returns based on param $echo
 */
function get_site_version($echo=true) {
	include(GSADMININCPATH.'configuration.php');
	if ($echo) {
		echo GSVERSION;
	} else {
		return GSVERSION;
	}
}


/**
 * Get GetSimple Language
 *
 * @since 3.1
 * @uses $LANG
 *
 * @param string
 */
function get_site_lang($short=false) {
	global $LANG;
	if ($short) {
		$LANG_header = preg_replace('/(?:(?<=([a-z]{2}))).*/', '', $LANG);
		return $LANG_header;
	} else {
		return $LANG;
	}
}

/**
 * Convert to Bytes
 *
 * @since 3.0
 *
 * @param $str string
 * @return string
 */
function toBytes($str){
	$val = trim($str);
	$last = strtolower($str[strlen($str)-1]);
		switch($last) {
			case 'g': $val *= 1024;
			case 'm': $val *= 1024;
			case 'k': $val *= 1024;
		}
	return $val;
}

/**
 * Remove Relative Paths
 *
 * @since 3.1
 *
 * @param $file string
 * @return string
 */
function removerelativepath($file) {
	while(strpos($file,'../')!==false) { 
		$file = str_replace('../','',$file);
	}
	return $file;
}

/**
 * Return a directory of files and folders
 *
 * @since 3.1
 *
 * @param $directory string directory to scan
 * @param $recursive boolean whether to do a recursive scan or not. 
 * @return array or files and folders
 */
function directoryToArray($directory, $recursive) {
	$array_items = array();
	if ($handle = opendir($directory)) {
		while (false !== ($file = readdir($handle))) {
			if ($file != "." && $file != "..") {
				if (is_dir($directory. "/" . $file)) {
					if($recursive) {
						$array_items = array_merge($array_items, directoryToArray($directory. "/" . $file, $recursive));
					}
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				} else {
					$file = $directory . "/" . $file;
					$array_items[] = preg_replace("/\/\//si", "/", $file);
				}
			}
		}
		closedir($handle);
	}
	return $array_items;
}


/**
 * Returns definition safely
 * 
 * @since 3.1.3
 * 
 * @param str $id 
 * @param bool $isbool treat definition as boolean and cast it
 * @return * returns definition or null if not defined
 */
function getDef($id,$isbool = false){
	if( defined($id) ) {
		if($isbool) return (bool) constant($id);
		return constant($id);
	}
}

/**
 * Alias for checking for debug constant
 * @since 3.2.1
 * @return  bool true if debug enabled
 */
function isDebug(){
	return getDef('GSDEBUG',true);
}

/**
 * check gs version is Beta
 *
 * @since  3.3.0
 * @return boolean true if beta release
 */
function isBeta(){
	return strPos(get_site_version(false),"b");
}

/**
 * Check if request is an ajax request
 * @since  3.3.0
 * @return bool true if ajax
 */
function requestIsAjax(){
	return (!empty($_SERVER['HTTP_X_REQUESTED_WITH']) && strtolower($_SERVER['HTTP_X_REQUESTED_WITH']) == 'xmlhttprequest') || isset($_GET['ajax']);
}

/**
 * check if array is multidimensional
 * @since 3.3.2
 * @param  mixed $ary
 * @return bool true if $ary is a multidimensional array
 */
function arrayIsMultid($ary){
	return is_array($ary) && ( count($ary) != count($ary,COUNT_RECURSIVE) );
}

/**
 * normalizes toolbar setting, always returns js array string syntax
 * @since 3.3.2
 * 
 * @param mixed $var string or array var to convert to js array syntax
 */
function returnJsArray($var){
	
	if(!$var) return;

	if(!is_array($var)) {
		// if looks like an array string try to parse as array
		if(strrpos($var, '[')){
			// normalize array strings
			$var = stripslashes($var);         // remove escaped quotes
			$var = trim(trim($var),',');       // remove trailing commas
			$var = str_replace('\'','"',$var); // replace single quotes with double (for json)
			
			$ary = json_decode($var);
			
			// add primary nest if missing
			if(!is_array($ary) || !arrayIsMultid($ary) ) $ary = json_decode('['.$var.']');
			
			// if proper array use it
			if(is_array($ary) ) $var = json_encode($ary);
			else $var = "'".trim($var,"\"'")."'"; 
		} 
		else{
			// else quote wrap string, trim to avoid double quoting
			$var = "'".trim($var,"\"'")."'";
		}	
	} 
	else {
		// convert php array to js array
		$var = json_encode($var);
	}

	return $var;
}


?>