<?php
class Shoutbox {
	
	public $response;
	
	public function Shoutbox($nick = null, $msg = null, $op = null) {
		if(!$nick && !$msg && $op == 'tick') {
			$this->returnShouts();
		}
		if($op == 'newShout') {
			$this->validateData($nick, $msg);
		}
	}
	
	public function returnShouts($status = null, $error = null) {
		$query = @mysql_query('SELECT * FROM `shouts` ORDER BY `id` DESC LIMIT 0, 10');
		$response = '';
		if(!$query)	{	
			$response .= '<response>';
				$response .= '<error>Database connection problem!</error>';
			$response .= '</response>';
		} else {
			$noShouts = mysql_num_rows($query);
			if($noShouts == 0) {
				$response .= '<response>';
					$response .= '<error>No shouts yet!</error>';
				$response .= '</response>';
			} else { 
				$response .= '<response>';
				while ($shout = mysql_fetch_object($query)) {
					$response .= '<shout>';
						$response .= '<nickname>'.$shout->nickname.'</nickname>';
						$response .= '<message>'.$shout->message.'</message>';
						$response .= '<date>'.$this->showTime($shout->date_added).'</date>';
					$response .= '</shout>';
				}
				$response .= '<status>'.$status.'</status>';
				$response .= '<error>'.$error.'</error>';
				$response .= '</response>';
			}
		}
		$this->response = $response;
	}
	
	private function validateData($nick = null, $msg = null) {
		$nick = $this->strFilter($nick);
		$msg = $this->strFilter($msg);
		if(empty($nick)) {
			$this->returnShouts(null, 'Don\'t be shy, enter your nickname.');
			return false;
		}
		elseif(empty($msg)) {
			$this->returnShouts(null, 'It doesn\'t seem that you want to shout at all! Write the message.');
			return false;
		}
		else {
			$this->addShout($nick, $msg);
		}		
	}
	
	private function strFilter($string) {
		$string = str_replace("http://", "", $string);
		$string = str_replace("<", "", $string);
		$string = str_replace(">", "", $string);
		$string = addslashes($string);
		return $string;
	}
	
	private function showTime($data_comment = null) {
		$now = date('Y-m-d H:i:s');
		$data_comment = urldecode($data_comment);
		$data_comment_data = substr($data_comment, 0, 10);
		$data_comment_curenta = substr($now, 0, 10);
		$nrsecunde = (strtotime($now) - strtotime($data_comment));
		$nrminute = $nrsecunde / (60);
		$nrore = $nrminute / (60);
		$nroreafisat = intval($nrore);
		$nrminuteafisat = intval($nrminute - ($nroreafisat * 60));
		$nrsecundeafisat = intval($nrsecunde - ($nroreafisat * 60 * 60) - ($nrminuteafisat * 60));
		if ($nroreafisat == 1 ) {$ore = 'hour';} else {$ore = 'hours';}
		if ($nrminuteafisat == 1 ) {$minute = 'minute';} else {$minute = 'minutes';}
		if ($nrsecundeafisat == 1 ) {$secunde = 'second';} else {$secunde = 'seconds';}
		if($nroreafisat > 0 && $nroreafisat <= 23  && $nrminuteafisat > 0) {
			return $nroreafisat.' '.$ore.' '.'and'.' '.$nrminuteafisat.' '.$minute.' '.'ago';
		}
		elseif($nroreafisat == 0 && $nrminuteafisat > 0) {
			return $nrminuteafisat.' '.$minute.' '.'and'.' '.$nrsecundeafisat.' '.$secunde.' '.'ago';
		}
		elseif($nroreafisat == 0 && $nrminuteafisat == 0) {
			return $nrsecundeafisat.' '.$secunde.' '.'ago';
		}
		elseif ($nroreafisat > 24) {
			return $data_comment;
		}
	}
	
	private function addShout($nickname = null, $message = null) {
		$time = date('Y-m-d H:i:s');
		$query = mysql_query("INSERT INTO `shouts` (`nickname`, `message`, `date_added`) VALUES ('".$nickname."', '".$message."','".$time."');");
		if(!$query) {
			$this->returnShouts(null, 'Database connection problem!');	
		} else {
			$this->returnShouts('Shout added successfully');
		}
	}
}
?>