<?

class IcalParser{
	
	static $timeout;
	
	function parse($filename, $addAllRawData = false){
		
		
		//PASSO A CURL PERCHE' IL TIMEOUT VIENE RADDOPPIATO
		// $context = stream_context_create(array(
			// 'http' => array(
				// 'user_agent' => 'Mozilla/5.0 (Linux; Android 8.0.0; SM-G950F) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/72.0.3626.53 Mobile Safari/537.36',//senza ua airbnb.es su alcune richieste da' 403 Forbidden
				// 'timeout' => 5,
			// ),
			// 'ssl'=>array(
				// "verify_peer"=>TNX_SECURE_CURL,
			// ),
		// ));
		// $data = file_get_contents($filename, false, $context);

		
		$ch = curl_init();
		curl_setopt($ch, CURLOPT_URL, $filename);
		curl_setopt($ch, CURLOPT_HTTPHEADER, ['User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/131.0.0.0 Safari/537.36']);//senza ua airbnb.es su alcune richieste da' 403 Forbidden
		curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
		if(IcalParser::$timeout) curl_setopt($ch, CURLOPT_TIMEOUT, IcalParser::$timeout);
		$data = curl_exec($ch);
		curl_close($ch);
		
		if(!$data || strpos(trim($data), "BEGIN:VCALENDAR") !== 0) return false;

		$separator = "\n";//bbplanner
		// if(strpos(substr($data, 0, -2), "\r\n") !== false) $separator = "\r\n";//con solo \n fallisce hotelbb - 2024/09: ho trovato un altro calendario che ha entrambi i separatori (la maggior parte \n, quindi fallisce)

		$data = explode("BEGIN:VEVENT", $data);

		$allProps = array(
				"uid",
				"dtstart",
				"dtstart-value-date",
				"dtend",
				"dtend-value-date",
				"summary",
				"description",
				"created",
				"last-modified",
				"dtstamp",//ultima modifica
				"x-microsoft-cdo-alldayevent",//slope
				"transp",//slope
				"class",//slope
				"status",//bbplanner
				"location",//bbplanner
				"sequence",
				"x-microsoft-cdo-busystatus",
				"resources",
				"categories"//booking-reservations
			);
		$return = array();
		foreach($data as $k=>$v){
			
			$array = array();
			
			$rows = explode($separator, $v);
			
			foreach($rows as $kk=>$vv){
				if($vv{0} == ' ') $array[$key] .= substr($vv, 1);//se la riga inizia con spazio lo accodo alla precedente chiave
				else{
					$vv = trim($vv);
					if(!$vv) continue;
					$pos = strpos($vv, ":");
					$key = preg_replace("/[^\w]/", "-", strtolower(substr($vv, 0, $pos)));
					if(!$k || in_array($key, $allProps)){
						$array[$key] = substr($vv, $pos+1);
					}
					else if(!in_array($vv, array('END:VEVENT', 'END:VCALENDAR'))){
						trigger_error("Dati non previsti: ".$vv);
						$array["?"][] = $vv;
					}
				}
				
				if($addAllRawData) $array["raw"][] = $vv;
			}

			if($array['description']) $array['description'] = str_replace("\\n", "\n", $array['description']);
			
			
			if(!$k){
				$return['info'] = $array;
			}
			else{
				if(!$array["uid"]) trigger_error("uid non trovato ".$v);
				if($return[$array["uid"]]) trigger_error("uid duplicato");
				$return['eventi'][$array["uid"]] = $array;
			}
			
		}
		return $return;
		
	}
}


?>