<?php

include_once("config.php");
include_once("airport_codes.php"); // todo: could move this to load on demand since its a large file

function getAirport($airport_code) {
	global $openflights_airports;
	if (array_key_exists($airport_code, $openflights_airports)) { 
		return $openflights_airports[$airport_code];
	}
	// not found
	return null;
}

// detect chrome
function isChrome() {
	$ischrome = (preg_match("/Chrome/i", $_SERVER['HTTP_USER_AGENT']) > 0);
	return $ischrome;
}

// detect a mobile device
function isMobile() {
	$iphone = (strpos(strtolower($_SERVER['HTTP_USER_AGENT']),"iphone") !== false);
	$android = (strpos(strtolower($_SERVER['HTTP_USER_AGENT']),"android") > 0);
	$palmpre = (strpos(strtolower($_SERVER['HTTP_USER_AGENT']),"webos") !== false);
	$ipod = (strpos(strtolower($_SERVER['HTTP_USER_AGENT']),"ipod") !== false);
	if($iphone || $android || $palmpre || $ipod) {
		// it's a mobile device
		return true;
		}
	return false;
}

// detect iPhone
function isiPhone() {
	$isiPhone = (bool) strpos(strtolower($_SERVER['HTTP_USER_AGENT']),"iphone");
	return $isiPhone;
}

// detect ipad
function isiPad() {
	$isiPad = (bool) strpos($_SERVER['HTTP_USER_AGENT'],'iPad');
	return $isiPad;
}

// detect IE 6
function isIE6() {
	$ua=getBrowser();
	$is_ie7 = ($ua["name"] == 'Internet Explorer' && $ua['version'] == 6);
	return $is_ie7;
}

// detect IE 7
function isIE7() {
	$ua=getBrowser();
	$is_ie7 = ($ua["name"] == 'Internet Explorer' && $ua['version'] == 7);
	return $is_ie7;
}

// detect IE 8
function isIE8() {
	$ua=getBrowser();
	$is_ie8 = ($ua["name"] == 'Internet Explorer' && $ua['version'] == 8);
	return $is_ie8;
}

// detect IE 9
function isIE9() {
	$ua=getBrowser();
	$is_ie9 = ($ua["name"] == 'Internet Explorer' && $ua['version'] == 9);
	return $is_ie9;
}

// detect any IE
function isIE() {
	$ua=getBrowser();
	$is_ie = ($ua["name"] == 'Internet Explorer');
	return $is_ie;
}

// list recent searched flights from cache
function showRecentSearches() {

	global $cfg;
	$dir = $cfg['CACHE_STORAGE_PATH'] . "/cache.storage/files"; // '/var/www/sunflight.net/lib/cache.storage/files/';
	$cache_files = @scandir($dir);
	//print_r($cache_files);

	if ($cache_files == null) { 
		print("No recent results.");
		return;
	}

	foreach ($cache_files as $cache_file) {
		if (strstr($cache_file, "sunflight_") !== false) {
			$parts = explode("_", $cache_file);
			$url = "flightcode=" . strtoupper($parts[1] . $parts[2]) . "&date=" . $parts[3] . "-" . $parts[4] . "-" . $parts[5];
			print("<a rel='external' href='/?" . $url . "'>" . strtoupper($parts[1] . $parts[2]) . " departing " . $parts[3] . "-" . $parts[4] . "-" . $parts[5] . "</a><br>");
		}
	}
}

// get distance between two locations
function calcDistance($lat1, $lon1, $lat2, $lon2, $unit) {

  $theta = $lon1 - $lon2;
  $dist = sin(deg2rad($lat1)) * sin(deg2rad($lat2)) +  cos(deg2rad($lat1)) * cos(deg2rad($lat2)) * cos(deg2rad($theta));
  $dist = acos($dist);
  $dist = rad2deg($dist);
  $miles = $dist * 60 * 1.1515;
  $unit = strtoupper($unit);

  if ($unit == "K") {
    return ($miles * 1.609344);
  } else if ($unit == "N") {
      return ($miles * 0.8684);
    } else {
        return $miles;
  }

}


?>