/**
* generate key for cache save
*
* @param string $mode
* @param Coords $coords
* @param int $zoom
* @param array[] $params
* @return string
*/
public static function generateCacheKey($mode, $coords, $zoom, $params = array())
{
$key = $mode . ':' . $coords->getLatStart() . ':' . $coords->getLatEnd() . ':' . $coords->getLonStart() . ':' . $coords->getLonEnd() . ':' . $zoom;
if (count($params) > 0) {
$key .= "::";
foreach ($params as $k => $v) {
$key .= "~" . $k . "=" . $v;
}
}
return $key;
}
/**
* return nets data in passed lat lng range
*
* @param Coords $coords
* @param array $select
* @param bool $asArray
* @return Wifi[]
*/
public function getAllNetsInLatLngRange($coords, $select = array('*'), $asArray = false)
{
$sqlSelect = $this->buildSelect($select);
$sql = 'SELECT ' . $sqlSelect . ' FROM ' . self::TABLE . ' WHERE (`latitude` > ?) AND (`latitude` < ?) AND (`longitude` > ?) AND (`longitude` < ?)';
$pdo = $this->database->getConnection()->getPdo();
$sth = $pdo->prepare($sql);
$sth->execute(array($coords->getLatStart(), $coords->getLatEnd(), $coords->getLonStart(), $coords->getLonEnd()));
$data = $sth->fetchAll(\PDO::FETCH_ASSOC);
// return as array of Objects
if (!$asArray) {
$wifi = array();
foreach ($data as $w) {
$wifi[] = Wifi::createWifiFromDBRow($w);
}
$data = $wifi;
}
return $data;
}
/**
* @param Coords $coords
* @param int $first
* @return string JSON with Wigle data
*/
private function getDataFromWigle($coords, $first = 0)
{
$arr = array("longrange1" => $coords->getLonStart(), "longrange2" => $coords->getLonEnd(), "latrange1" => $coords->getLatStart(), "latrange2" => $coords->getLatEnd());
if ($first != 0) {
$arr["first"] = $first;
$arr["last"] = $first + 99;
}
return $this->sendCurlRequest(self::WIGLE_GETDATA_URL, $arr);
}
/**
* create X,Y array MAP
* index to lat or lng
*
* @param array|\Nette\Database\Table\IRow[] $data
* @param Coords $coords
* @return array
*/
private function createMappingXY($data, $coords)
{
$mappingX = array($coords->getLatStart(), $coords->getLatEnd());
$mappingY = array($coords->getLonStart(), $coords->getLonEnd());
foreach ($data as $d) {
$d_coords = new Coords($d['lat_start'], $d['lat_end'], $d['lon_start'], $d['lon_end']);
if (!in_array($d_coords->getLatStart(), $mappingX) && $d_coords->getLatStart() >= $coords->getLatStart() && $d_coords->getLatStart() <= $coords->getLatEnd()) {
$mappingX[] = $d_coords->getLatStart();
}
if (!in_array($d_coords->getLatEnd(), $mappingX) && $d_coords->getLatEnd() <= $coords->getLatEnd() && $d_coords->getLatEnd() >= $coords->getLatStart()) {
$mappingX[] = $d_coords->getLatEnd();
}
if (!in_array($d_coords->getLonStart(), $mappingY) && $d_coords->getLonStart() >= $coords->getLonStart() && $d_coords->getLonStart() <= $coords->getLonEnd()) {
$mappingY[] = $d_coords->getLonStart();
}
if (!in_array($d_coords->getLonEnd(), $mappingY) && $d_coords->getLonEnd() <= $coords->getLonEnd() && $d_coords->getLonEnd() >= $coords->getLonStart()) {
$mappingY[] = $d_coords->getLonEnd();
}
}
sort($mappingX);
sort($mappingY);
return array('xMap' => $mappingX, 'yMap' => $mappingY);
}
/**
* counts lat lng range shown in one pixel
* onepxlat -> latitude range in one pixel
* onepxlon -> longitude range in one pixel
*
* @param Coords $coords
* @uses OverlayRenderer::IMAGE_BIGGER as size of image
* @return object
*/
private function getConversionRatio($coords)
{
$one_pixel_lat = abs($coords->getLatEnd() - $coords->getLatStart()) / self::IMAGE_BIGGER;
$one_pixel_lon = abs($coords->getLonEnd() - $coords->getLonStart()) / self::IMAGE_BIGGER;
return (object) array("onepxlat" => $one_pixel_lat, "onepxlon" => $one_pixel_lon);
}
/**
* return number of nets on Wigle overlay Image
*
* @param Coords $coords
* @return int
*/
private function analyzeImage($coords)
{
// TODO: ziskavat i jinak celky obrazek nez ctverec pokud mam jiny rozsah souradnic nez ctverec?
$params = array("lat1" => $coords->getLatStart(), "long1" => $coords->getLonStart(), "lat2" => $coords->getLatEnd(), "long2" => $coords->getLonEnd(), "redir" => "Y", "networksOnly" => "Y", "sizeX" => 256, "sizeY" => 256);
$url = self::WIGLE_IMAGE_OVERLAY_URL . "?" . http_build_query($params);
$headers = get_headers($url, 1);
$url = self::WIGLE_URL . trim($headers["Location"]);
$image = imagecreatefrompng($url);
$points = 0;
for ($x = 0; $x < 256; $x++) {
for ($y = 0; $y < 256; $y++) {
if (in_array(dechex(imagecolorat($image, $x, $y)), $this->wigleNetColors)) {
$points++;
}
}
}
return $points;
}