<?php 

class Url{
	public static $exclude = array();
	
	public static function getParams(){
		$get = $_GET;
		
		if(self::$exclude){
			foreach(self::$exclude as $val){
				unset($get[$val]);
			}
		}
		
		return $get;
	}

	public static function setParams($params = array()){
		if($params){
			$get = self::getParams();
			
			$url = explode("?", $_SERVER["REQUEST_URI"], 2);
			$append = "";
			$get = array_merge($get, $params);
			
			foreach($get as $key => $val){
				if(is_array($val))
					continue;
			
				$key = trim($key);
				$val = trim($val);
				
				if(empty($key))
					continue;

				$append .= "&{$key}={$val}";
			}
			
			return "{$url[0]}?".substr($append, 1);
		}
		
		return $_SERVER["REQUEST_URI"];
	}

	public static function delParams($params = array(), $withSymbol = false){
		if($params){
			$get = self::getParams();
			
			$url = explode("?", $_SERVER["REQUEST_URI"], 2);
			$append = "";
			
			foreach($params as $k){
				if(Str::isBlank($k))
					continue;
				
				if(isset($get[$k]))
					unset($get[$k]);
			}
			
			if($get){
				foreach($get as $key => $val){
					$append .= "&{$key}={$val}";
				}
			}
			
			$url = $append ? "{$url[0]}?".substr($append, 1)."&" : "{$url[0]}?";
		}
		else{
			$url = self::getUrl().self::getSymbol();
		}
		
		if(!$withSymbol)
			$url = substr($url, 0, -1);
			
		return $url;
	}
	
	public static function delParam($param){
		return self::delParams(array($param));
	}
	
	public static function clean(){
		$get = self::getParams();
		
		if($get){
			$url = explode("?", $_SERVER["REQUEST_URI"], 2);
			$append = "";
			$count = 0;
			
			foreach($get as $key => $val){
				if(!is_string($val))
					continue;
				
				if(trim($val) === "")
					$count++;
				else
					$append .= "&{$key}={$val}";
			}
			
			$url = $append ? "{$url[0]}?".substr($append, 1) : $url[0];
			if($count)
				header("location: {$url}");
		}
	}
	
	public static function getPath(){
		$url = explode("?", $_SERVER["REQUEST_URI"], 2);
		return $url[0];
	}
	
	public static function getAppend(){
		$append = "";
	
		if($get = self::getParams()){
			foreach($get as $key => $val){
				if(is_array($val))
					continue;
				
				$append .= "&{$key}={$val}";
			}
			
			$append = "?".substr($append, 1);
		}
		
		return $append;
	}
	
	public static function getUrl(){
		return self::getPath().self::getAppend();
	}
	
	public static function getSymbol(){	
		return strpos($_SERVER["REQUEST_URI"], "?") === false ? "?" : "&";
	}
}