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<?php
    /**
     * 
     * @author marcus
     *
     */
    class EM_Notices implements Iterator, JsonSerializable {
    	/**
    	 * If object has been displayed, this gets set to true, can be checked to avoid duplicates.
    	 * @var boolean
    	 * @since 5.5.7
    	 */
    	public $displayed = false;
    	public $set_cookies = true;
		public $notices = array('errors'=>array(), 'infos'=>array(), 'alerts'=>array(), 'confirms'=>array());
        
        function __construct( $set_cookies = true ){
        	//Grab from cookie, if it exists
        	$this->set_cookies = $set_cookies == true;
        	if( $this->set_cookies ){
	        	if( !empty($_COOKIE['em_notices']) ) {
	        	    $notices = json_decode(base64_decode($_COOKIE['em_notices']), true);
	        	    if( is_array($notices) ){
		        		$this->notices = $notices;
		        		setcookie('em_notices', '', time() - 3600, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), true); //unset the cookie
	        	    }
	        	}
        	}
            add_filter('wp_redirect', array(&$this,'destruct'), 1,1);
        }
        
        function destruct($redirect = false){
        	//Flush notices that weren't made to stay cross-requests, we can do this if initialized immediately.
        	foreach($this->notices as $notice_type => $notices){
        		foreach ($notices as $key => $notice){
        			if( empty($notice['static']) ){
        				unset($this->notices[$notice_type][$key]);
        			}else{
        				unset($this->notices[$notice_type][$key]['static']); //so it gets removed next request
        				$has_static = true;
        			}
        		}
        	}
        	if( $this->set_cookies ){
	            if(count($this->notices['errors']) > 0 || count($this->notices['alerts']) > 0 || count($this->notices['infos']) > 0 || count($this->notices['confirms']) > 0){
	            	setcookie('em_notices', base64_encode(json_encode($this->notices)), time() + 30, COOKIEPATH, COOKIE_DOMAIN, is_ssl(), true); //sets cookie for 30 seconds, which may be too much
	            }
        	}
        	return $redirect;
        }
        
        function __toString(){
            $string = false;
            if(count($this->notices['errors']) > 0){
                $string .= "<div class='em-warning em-warning-errors notice notice-error'>{$this->get_errors()}</div>";
            }
            if(count($this->notices['alerts']) > 0){
                $string .= "<div class='em-warning em-warning-alerts notice notice-warning'>{$this->get_alerts()}</div>";
            }
            if(count($this->notices['infos']) > 0){
                $string .= "<div class='em-warning em-warning-infos notice notice-info'>{$this->get_infos()}</div>";
            }
            if(count($this->notices['confirms']) > 0){
                $string .= "<div class='em-warning em-warning-confirms notice notice-success'>{$this->get_confirms()}</div>";
            }
            $this->displayed = true;
            return ($string !== false) ? "<div class='statusnotice'>".$string."</div>" : '';
        }
        
        /* General */
        function add($string, $type, $static = false){
        	if( is_array($string) ){
        		$result = true;
        		foreach($string as $key => $string_item){
        		    if( !is_array($string_item) ){
	        			if( $this->add($string_item, $type, $static) === false ){ $result = false; }
        			}else{
	        			if( $this->add_item($string_item, $type, $static) === false ){ $result = false; }
        			}
        		}
        		return $result;
        	}
            if($string != ''){
                return $this->add_item($string, $type, $static);
            }else{
                return false;
            }
        }

/* Alerts */
        function add_alert($string, $static=false){
            return $this->add($string, 'alerts', $static);
        }
        function remove_alert($key){
            return $this->remove($key, 'alerts');
        }
        function get_alerts(){
            return $this->get('alerts');
        }
        function count_alerts(){
            return $this->count('alerts');
        }
        
        /* Info */
        function add_info($string, $static=false){
            return $this->add($string, 'infos', $static);
        }
        function remove_info($key){
            return $this->remove($key, 'infos');
        }
        function get_infos(){
            return $this->get('infos');
        }
        function count_infos(){
            return $this->count('infos');
        }
        
        /* Confirms */
        function add_confirm($string, $static=false){
        	return $this->add($string, 'confirms', $static);
        }
        function remove_confirm($key){
            return $this->remove($key, 'confirms');
        }
        function get_confirms(){
            return $this->get('confirms');
        }  
        function count_confirms(){
            return $this->count('confirms');
        }
        
        // Encoiding in JsonSerializable
	    function jsonSerialize(){
        	$notices = array();
	        foreach( $notices as $k => $v ){
	        	if( !empty($v) ){
	        		$notices[$k] = $v;
		        }
	        }
        	return $notices;
	    }

//Iterator Implementation
	    function rewind(){
	        reset($this->bookings);
	    }  
	    function current(){
	        $var = current($this->bookings);
	        return $var;
	    }  
	    function key(){
	        $var = key($this->bookings);
	        return $var;
	    }  
	    function next(){
	        $var = next($this->bookings);
	        return $var;
	    }  
	    function valid(){
	        $key = key($this->bookings);
	        $var = ($key !== NULL && $key !== FALSE);
	        return $var;
	    }
     
    }
    function em_notices_init(){
	    global $EM_Notices;
	    $EM_Notices = new EM_Notices();	
    }
    add_action('plugins_loaded', 'em_notices_init');
?>