<?php

	class UniteFunctionsRev{
		
		public static function throwError($message,$code=null){
			if(!empty($code))
				throw new Exception($message,$code);
			else
				throw new Exception($message);
		}
		
		
		/**
		 * 
		 * set output for download
		 */
		public static function downloadFile($str,$filename="output.txt"){
			
			//output for download
			header('Content-Description: File Transfer');
			header('Content-Type: text/html; charset=UTF-8');
    		header("Content-Disposition: attachment; filename=".$filename.";");
    		header("Content-Transfer-Encoding: binary");
    		header("Content-Length: ".strlen($str));			
			echo $str;			
			exit();
		}
		
		
		
		/**
		 * 
		 * turn boolean to string
		 */
		public static function boolToStr($bool){
			if(gettype($bool) == "string")
				return($bool);
			if($bool == true)
				return("true");
			else 
				return("false");
		}
		
		/**
		 * 
		 * convert string to boolean
		 */
		public static function strToBool($str){
			if(is_bool($str))
				return($str);
				
			if(empty($str))
				return(false);
				
			if(is_numeric($str))
				return($str != 0);
				
			$str = strtolower($str);
			if($str == "true")
				return(true);
				
			return(false);
		}
		
		
		//------------------------------------------------------------
		// get black value from rgb value
		public static function yiq($r,$g,$b){
			return (($r*0.299)+($g*0.587)+($b*0.114));
		}
		
		//------------------------------------------------------------	
		// convert colors to rgb
		public static function html2rgb($color){
			if ($color[0] == '#')
				$color = substr($color, 1);
			if (strlen($color) == 6)
				list($r, $g, $b) = array($color[0].$color[1],
										 $color[2].$color[3],
										 $color[4].$color[5]);
			elseif (strlen($color) == 3)
				list($r, $g, $b) = array($color[0].$color[0], $color[1].$color[1], $color[2].$color[2]);
			else
				return false;
			$r = hexdec($r); $g = hexdec($g); $b = hexdec($b);
			return array($r, $g, $b);
		}
			
		
		//---------------------------------------------------------------------------------------------------
		// convert timestamp to time string
		public static function timestamp2Time($stamp){
			$strTime = date("H:i",$stamp);
			return($strTime);
		}
		
		//---------------------------------------------------------------------------------------------------
		// convert timestamp to date and time string
		public static function timestamp2DateTime($stamp){
			$strDateTime = date("d M Y, H:i",$stamp);
			return($strDateTime);		
		}
		
		//---------------------------------------------------------------------------------------------------
		// convert timestamp to date string
		public static function timestamp2Date($stamp){
			$strDate = date("d M Y",$stamp);	//27 Jun 2009
			return($strDate);
		}
		
		/**
		 * get value from array. if not - return alternative
		 */
		public static function getVal($arr,$key,$altVal=""){
			if(isset($arr[$key])) return($arr[$key]);
			return($altVal);
		}
		
		//------------------------------------------------------------
		
		public static function toString($obj){
			return(trim((string)$obj));
		}
		
		//------------------------------------------------------------
		// remove utf8 bom sign
		public static function remove_utf8_bom($content){
			$content = str_replace(chr(239),"",$content);
			$content = str_replace(chr(187),"",$content);
			$content = str_replace(chr(191),"",$content);		
			$content = trim($content);
			return($content);
		}
		
		//------------------------------------------------------------
		// get variable from post or from get. get wins.
		public static function getPostGetVariable($name,$initVar = ""){
			$var = $initVar;
			if(isset($_POST[$name])) $var = $_POST[$name];
			else if(isset($_GET[$name])) $var = $_GET[$name];
			return($var);
		}
		
		
		//------------------------------------------------------------
		
		public static function getPostVariable($name,$initVar = ""){
			$var = $initVar;
			if(isset($_POST[$name])) $var = $_POST[$name];
			return($var);
		}
		
		//------------------------------------------------------------
	
		
		public static function getGetVar($name,$initVar = ""){
			$var = $initVar;
			if(isset($_GET[$name])) $var = $_GET[$name];
			return($var);
		}
		
		/**
		 * 
		 * validate that some file exists, if not - throw error
		 */
		public static function validateFilepath($filepath,$errorPrefix=null){
			if(file_exists($filepath) == true)
				return(false);
			if($errorPrefix == null)
				$errorPrefix = "File";
			$message = $errorPrefix." $filepath not exists!";
			self::throwError($message);
		}
		
		/**
		 * 
		 * validate that some value is numeric
		 */
		public static function validateNumeric($val,$fieldName=""){
			self::validateNotEmpty($val,$fieldName);
			
			if(empty($fieldName))
				$fieldName = "Field";
			
			if(!is_numeric($val))
				self::throwError("$fieldName should be numeric ");
		}
		
		/**
		 * 
		 * validate that some variable not empty
		 */
		public static function validateNotEmpty($val,$fieldName=""){
			
			if(empty($fieldName))
				$fieldName = "Field";
				
			if(empty($val) && is_numeric($val) == false)
				self::throwError("Field <b>$fieldName</b> should not be empty");
		}
		
		/**
		 * 
		 * if directory not exists - create it
		 * @param $dir
		 */
		public static function checkCreateDir($dir){
			if(!is_dir($dir))
				mkdir($dir);
		} 
		
		
		//------------------------------------------------------------
		//filter array, leaving only needed fields - also array
		public static function filterArrFields($arr,$fields){
			$arrNew = array();
			foreach($fields as $field){
				if(isset($arr[$field])) 
					$arrNew[$field] = $arr[$field];
			}
			return($arrNew);
		}
		
		//------------------------------------------------------------
		//get path info of certain path with all needed fields
		public static function getPathInfo($filepath){
			$info = pathinfo($filepath);
			
			//fix the filename problem
			if(!isset($info["filename"])){
				$filename = $info["basename"];
				if(isset($info["extension"]))
					$filename = substr($info["basename"],0,(-strlen($info["extension"])-1));
				$info["filename"] = $filename;
			}
						
			return($info);
		}
		
		/**
		 * Convert std class to array, with all sons
		 * @param unknown_type $arr
		 */
		public static function convertStdClassToArray($arr){
			$arr = (array)$arr;
			
			$arrNew = array();
			
			foreach($arr as $key=>$item){
				$item = (array)$item;
				$arrNew[$key] = $item;
			}
			
			return($arrNew);
		}
		
		//------------------------------------------------------------
		//save some file to the filesystem with some text
		public static function writeFile($str,$filepath){
			$fp = fopen($filepath,"w+");
			fwrite($fp,$str);
			fclose($fp);
		}
		
		//------------------------------------------------------------
		//save some file to the filesystem with some text
		public static function writeDebug($str,$filepath="debug.txt",$showInputs = true){
			$post = print_r($_POST,true);			
			$server = print_r($_SERVER,true);
			
			if(getType($str) == "array")
				$str = print_r($str,true);
			
			if($showInputs == true){
				$output = "--------------------"."\n";
				$output .= $str."\n";
				$output .= "Post: ".$post."\n";
			}else{
				$output = "---"."\n";
				$output .= $str . "\n";
			}
						
			if(!empty($_GET)){
				$get = print_r($_GET,true);			
				$output .= "Get: ".$get."\n";
			}
			
			//$output .= "Server: ".$server."\n";
			
			$fp = fopen($filepath,"a+");
			fwrite($fp,$output);
			fclose($fp);
		}
		
		
		/**
		 * 
		 * clear debug file
		 */
		public static function clearDebug($filepath = "debug.txt"){
			
			if(file_exists($filepath))
				unlink($filepath);
		}
		
		/**
		 * 
		 * save to filesystem the error
		 */
		public static function writeDebugError(Exception $e,$filepath = "debug.txt"){
			$message = $e->getMessage();
			$trace = $e->getTraceAsString();
			
			$output = $message."\n";
			$output .= $trace."\n";
			
			$fp = fopen($filepath,"a+");
			fwrite($fp,$output);
			fclose($fp);			
		}
		
		
		//------------------------------------------------------------
		//save some file to the filesystem with some text
		public static function addToFile($str,$filepath){
			$fp = fopen($filepath,"a+");
			fwrite($fp,"---------------------\n");
			fwrite($fp,$str."\n");
			fclose($fp);
		}
		
		//--------------------------------------------------------------
		//check the php version. throw exception if the version beneath 5
		private static function checkPHPVersion(){
			$strVersion = phpversion();
			$version = (float)$strVersion;
			if($version < 5) throw new Exception("You must have php5 and higher in order to run the application. Your php version is: $version");
		}
		
		//--------------------------------------------------------------
		// valiadte if gd exists. if not - throw exception
		private static function validateGD(){
			if(function_exists('gd_info') == false) 
				throw new Exception("You need GD library to be available in order to run this application. Please turn it on in php.ini");
		}
				
		
		//--------------------------------------------------------------
		//return if the json library is activated
		public static function isJsonActivated(){
			return(function_exists('json_encode'));
		}
		
		
		/**
		 * 
		 * encode array into json for client side
		 */
		public static function jsonEncodeForClientSide($arr){
			$json = "";
			if(!empty($arr)){
				$json = json_encode($arr);
				$json = addslashes($json);
			}
			
			$json = "'".$json."'";
			
			return($json);
		}
	
	
		/**
		 * 
		 * decode json from the client side
		 */
		public static function jsonDecodeFromClientSide($data){
		
			$data = stripslashes($data);
			$data = str_replace('&#092;"','\"',$data);
			$data = json_decode($data);
			$data = (array)$data;
			
			return($data);
		}
		
		
		//--------------------------------------------------------------
		//validate if some directory is writable, if not - throw a exception
		private static function validateWritable($name,$path,$strList,$validateExists = true){
			
			if($validateExists == true){
				//if the file/directory doesn't exists - throw an error.
				if(file_exists($path) == false)
					throw new Exception("$name doesn't exists");
			}
			else{
				//if the file not exists - don't check. it will be created.
				if(file_exists($path) == false) return(false);
			}
			
			if(is_writable($path) == false){
				chmod($path,0755);		//try to change the permissions
				if(is_writable($path) == false){
					$strType = "Folder";
					if(is_file($path)) $strType = "File";
					$message = "$strType $name is doesn't have a write permissions. Those folders/files must have a write permissions in order that this application will work properly: $strList";					
					throw new Exception($message);
				}
			}
		}				
		
		//--------------------------------------------------------------
		//validate presets for identical keys
		public static function validatePresets(){
			global $g_presets;
			if(empty($g_presets)) return(false);
			//check for duplicates
			$assoc = array();
			foreach($g_presets as $preset){
				$id = $preset["id"];
				if(isset($assoc[$id]))
					throw new Exception("Double preset ID detected: $id");
				$assoc[$id] = true;
			}
		}
				
		//--------------------------------------------------------------
		//Get url of image for output
		public static function getImageOutputUrl($filename,$width=0,$height=0,$exact=false){
			//exact validation:
			if($exact == "true" && (empty($width) || empty($height) ))
				self::throwError("Exact must have both - width and height");
			
			$url = CMGlobals::$URL_GALLERY."?img=".$filename;
			if(!empty($width))
				$url .= "&w=".$width;
				
			if(!empty($height))
				$url .= "&h=".$height;
			
			if($exact == true)
				$url .= "&t=exact";
				
			return($url);
		}

		/**
		 * 
		 * get list of all files in the directory
		 */
		public static function getFileList($path){
			$dir = scandir($path);
			$arrFiles = array();
			foreach($dir as $file){
				if($file == "." || $file == "..") continue;
				$filepath = $path . "/" . $file;
				if(is_file($filepath)) $arrFiles[] = $file;
			}
			return($arrFiles);
		}

		/**
		 * 
		 * do "trim" operation on all array items.
		 */
		public static function trimArrayItems($arr){
			if(gettype($arr) != "array")
				UniteFunctionsRev::throwError("trimArrayItems error: The type must be array");
			
			foreach ($arr as $key=>$item)
				$arr[$key] = trim($item);
			
			return($arr);
		}
		
		/**
		 * 
		 * get url contents
		 */
		public static function getUrlContents($url,$arrPost=array(),$method = "post",$debug=false){
			$ch = curl_init();
			$timeout = 0;
						
			$strPost = '';
			foreach($arrPost as $key=>$value){
				if(!empty($strPost))
					$strPost .= "&";
				$value = urlencode($value);
				$strPost .= "$key=$value";
			}
						
			
			//set curl options
			if(strtolower($method) == "post"){
	 			curl_setopt($ch, CURLOPT_POST, 1);
	 			curl_setopt($ch, CURLOPT_POSTFIELDS,$strPost);
			}
			else	//get
				$url .= "?".$strPost;

			//remove me
			//Functions::addToLogFile(SERVICE_LOG_SERVICE, "url", $url);				
				
			curl_setopt($ch, CURLOPT_URL, $url);
			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
			curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout);
			
			$headers = array();
			$headers[] = "User-Agent:Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9.2.8) Gecko/20100722 Firefox/3.6.8";
			$headers[] = "Accept-Charset:utf-8;q=0.7,*;q=0.7";
			curl_setopt($ch, CURLOPT_HTTPHEADER, $headers); 
			
			$response = curl_exec($ch);
			
			if($debug == true){
				dmp($url);
				dmp($response);
				exit();
			}			
			
			if($response == false) 
				throw new Exception("getUrlContents Request failed");
				
			curl_close($ch);
			return($response);
		}
		
		/**
		 * 
		 * get link html
		 */
		public static function getHtmlLink($link,$text,$id="",$class=""){
			
			if(!empty($class))
				$class = " class='$class'";
			
			if(!empty($id))
				$id = " id='$id'";
				
			$html = "<a href=\"$link\"".$id.$class.">$text</a>";
			return($html);
		}
		
		/**
		 * 
		 * get select from array
		 */
		public static function getHTMLSelect($arr,$default="",$htmlParams="",$assoc = false){
			
			$html = "<select $htmlParams>";
			foreach($arr as $key=>$item){				
				$selected = "";
				
				if($assoc == false){
					if($item == $default) $selected = " selected ";
				}
				else{ 
					if(trim($key) == trim($default))
						$selected = " selected ";
				}
					
				
				if($assoc == true)
					$html .= "<option $selected value='$key'>$item</option>";
				else
					$html .= "<option $selected value='$item'>$item</option>";
			}
			$html.= "</select>";
			return($html);
		}
		
		
		/**
		 * 
		 * Convert array to assoc array by some field
		 */
		public static function arrayToAssoc($arr,$field=null){
			$arrAssoc = array();
			
			foreach($arr as $item){
				if(empty($field))
					$arrAssoc[$item] = $item;
				else
					$arrAssoc[$item[$field]] = $item;
			}
							
			return($arrAssoc);
		}
		
		
		/**
		 * 
		 * convert assoc array to array
		 */
		public static function assocToArray($assoc){
			$arr = array();
			foreach($assoc as $item)
				$arr[] = $item;
			
			return($arr);
		}
		
		/**
		 * 
		 * strip slashes from textarea content after ajax request to server
		 */
		public static function normalizeTextareaContent($content){
			if(empty($content))
				return($content);
			$content = stripslashes($content);
			$content = trim($content);
			return($content);
		}
		
		/**
		 * 
		 * get random array item
		 */
		public static function getRandomArrayItem($arr){
			$numItems = count($arr);
			$rand = rand(0, $numItems-1);
			$item = $arr[$rand];
			return($item);
		}
		
		
	}
	
?>