public function init($args)
{
$this->baseURL = $args['BASE_URL'];
$this->diskCache = new DiskCache(Kurogo::getSiteVar('WMS_CACHE', 'maps'), 86400 * 7, true);
$this->diskCache->preserveFormat();
$filename = md5($this->baseURL);
$metafile = $filename . '-meta.txt';
if (!$this->diskCache->isFresh($filename)) {
$params = array('request' => 'GetCapabilities', 'service' => 'WMS');
$query = $this->baseURL . '?' . http_build_query($params);
file_put_contents($this->diskCache->getFullPath($metafile), $query);
$contents = file_get_contents($query);
$this->diskCache->write($contents, $filename);
} else {
$contents = $this->diskCache->read($filename);
}
$this->wmsParser = new WMSDataParser();
$this->wmsParser->parseData($contents);
$this->enableAllLayers();
// TODO make sure this projection is supported by the server
$projections = $this->wmsParser->getProjections();
if (count($projections)) {
// make sure this is a projection we can handle
foreach ($projections as $proj) {
$contents = MapProjector::getProjSpecs($proj);
if ($contents) {
$this->setMapProjection($proj);
}
}
} else {
$this->setMapProjection(GEOGRAPHIC_PROJECTION);
}
}
protected function getCurrentScale()
{
if ($this->unitsPerMeter === null) {
$contents = MapProjector::getProjSpecs($this->mapProjection);
if (preg_match('/to_meter=([\d\.]+)/', $contents, $matches)) {
$this->unitsPerMeter = 1 / $matches[1];
} else {
$this->unitsPerMeter = self::NO_PROJECTION;
}
}
if ($this->unitsPerMeter != self::NO_PROJECTION) {
$metersPerPixel = $this->getHorizontalRange() / $this->imageWidth / $this->unitsPerMeter;
return $metersPerPixel / self::LIFE_SIZE_METERS_PER_PIXEL;
} else {
// TODO this isn't quite right, this won't allow us to use
// maxScaleDenom and minScaleDenom in any layers
return self::NO_PROJECTION;
}
}
public function __construct($projString)
{
$this->specs = $projString;
if (preg_match('/^\\d+$/', $projString)) {
$this->format = 'wkid';
} elseif (preg_match('/^\\w+\\[/', $projString)) {
$this->format = 'wkt';
} elseif (preg_match('/^\\+/', $projString)) {
$this->format = 'proj4';
}
switch ($this->format) {
case 'wkid':
$projString = MapProjector::getProjSpecs($projString);
$params = self::parseProj4String($projString);
$this->initFromProj4Params($params);
break;
case 'wkt':
$params = WKTParser::parseWKTString($projString);
$this->initFromWKTParams($params);
break;
case 'proj4':
default:
$params = self::parseProj4String($projString);
$this->initFromProj4Params($params);
break;
}
}
