/**
* Renders and returns the output.
* @see ParserHook::render
*
* @since 0.7
*
* @param array $parameters
*
* @return string
*/
public function render(array $parameters)
{
$canGeocode = MapsGeocoders::canGeocode();
if ($canGeocode) {
$location = MapsGeocoders::attemptToGeocode($parameters['location'], $parameters['geoservice'], $parameters['mappingservice']);
} else {
$location = MapsCoordinateParser::parseCoordinates($parameters['location']);
}
// TODO
if ($location) {
$destination = MapsGeoFunctions::findDestination($location, $parameters['bearing'], MapsDistanceParser::parseDistance($parameters['distance']));
$output = MapsCoordinateParser::formatCoordinates($destination, $parameters['format'], $parameters['directional']);
} else {
// The location should be valid when this method gets called.
throw new MWException('Attempt to find a destination from an invalid location');
}
return $output;
}
/**
* Renders and returns the output.
* @see ParserHook::render
*
* @since 0.7
*
* @param array $parameters
*
* @return string
*/
public function render(array $parameters)
{
if (MapsGeocoders::canGeocode()) {
$start = MapsGeocoders::attemptToGeocode($parameters['location1'], $parameters['geoservice'], $parameters['mappingservice']);
$end = MapsGeocoders::attemptToGeocode($parameters['location2'], $parameters['geoservice'], $parameters['mappingservice']);
} else {
$start = MapsCoordinateParser::parseCoordinates($parameters['location1']);
$end = MapsCoordinateParser::parseCoordinates($parameters['location2']);
}
if ($start && $end) {
$output = MapsDistanceParser::formatDistance(MapsGeoFunctions::calculateDistance($start, $end), $parameters['unit'], $parameters['decimals']);
} else {
// The locations should be valid when this method gets called.
throw new Exception('Attempt to find the distance between locations of at least one is invalid');
}
return $output;
}
public function __construct(&$results, SMWPrintRequest $printRequest, SRFFiltered &$queryPrinter)
{
global $wgParser;
parent::__construct($results, $printRequest, $queryPrinter);
if (!defined('Maps_VERSION') || version_compare(Maps_VERSION, '1.0', '<')) {
throw new FatalError('You need to have the <a href="http://www.mediawiki.org/wiki/Extension:Maps">Maps</a> extension version 1.0 or higher installed in order to use the distance filter.<br />');
}
MapsGeocoders::init();
$params = $this->getActualParameters();
if (array_key_exists('distance filter origin', $params)) {
$origin = MapsGeocoders::attemptToGeocode($wgParser->recursiveTagParse($params['distance filter origin']));
} else {
$origin = array('lat' => '0', 'lon' => '0');
}
if (array_key_exists('distance filter unit', $params)) {
$this->mUnit = MapsDistanceParser::getValidUnit($wgParser->recursiveTagParse($params['distance filter unit']));
} else {
$this->mUnit = MapsDistanceParser::getValidUnit();
}
// Is the real position stored in a property?
if (array_key_exists('distance filter property', $params)) {
$property = trim($wgParser->recursiveTagParse($params['distance filter property']));
$locations = array();
} else {
$property = null;
$locations = null;
}
$targetLabel = $printRequest->getLabel();
foreach ($this->getQueryResults() as $id => $filteredItem) {
$row = $filteredItem->getValue();
// $filteredItem is of class SRF_Filtered_Item
// $row is an array of SMWResultArray
foreach ($row as $field) {
// $field is an SMWResultArray
$label = $field->getPrintRequest()->getLabel();
if ($label === $targetLabel) {
$field->reset();
$dataValue = $field->getNextDataValue();
// only use first value
if ($dataValue !== false) {
$posText = $dataValue->getShortText(SMW_OUTPUT_WIKI, false);
if ($property === null) {
// position is directly given
$pos = MapsGeocoders::attemptToGeocode($posText);
} else {
// position is given in a property of a page
// if we used this page before, just look up the coordinates
if (array_key_exists($posText, $locations)) {
$pos = $locations[$posText];
} else {
// query the position's page for the coordinates or address
$posText = SMWQueryProcessor::getResultFromFunctionParams(array($posText, '?' . $property), SMW_OUTPUT_WIKI, SMWQueryProcessor::INLINE_QUERY, true);
//
if ($posText !== '') {
// geocode
$pos = MapsGeocoders::attemptToGeocode($posText);
} else {
$pos = array('lat' => '0', 'lon' => '0');
}
// store coordinates in case we need them again
$locations[$posText] = $pos;
}
}
if (is_array($pos)) {
$distance = round(MapsGeoFunctions::calculateDistance($origin, $pos) / MapsDistanceParser::getUnitRatio($this->mUnit));
if ($distance > $this->mMaxDistance) {
$this->mMaxDistance = $distance;
}
} else {
$distance = -1;
}
} else {
$distance = -1;
// no location given
}
$filteredItem->setData('distance-filter', $distance);
break;
}
}
}
if (array_key_exists('distance filter max distance', $params) && is_numeric($maxDist = trim($wgParser->recursiveTagParse($params['distance filter max distance'])))) {
// this assignation ^^^ is ugly, but intentional
$this->mMaxDistance = $maxDist;
} else {
if ($this->mMaxDistance > 1) {
$base = pow(10, floor(log10($this->mMaxDistance)));
$this->mMaxDistance = ceil($this->mMaxDistance / $base) * $base;
}
}
}
/**
* Translates the coordinates field to the centre field and makes sure it's set to it's default when invalid.
*
* @since 1.0
*
* @param array &$params
*/
protected function setCentre(array &$params)
{
// If it's false, the coordinate was invalid, or geocoding failed. Either way, the default's should be used.
if ($params['coordinates'] === false) {
global $egMapsDefaultMapCentre;
$centre = MapsGeocoders::attemptToGeocode($egMapsDefaultMapCentre, $params['geoservice'], $this->service->getName());
if ($centre === false) {
throw new Exception('Failed to parse the default centre for the map. Please check the value of $egMapsDefaultMapCentre.');
} else {
$params['centre'] = $centre;
}
} else {
$params['centre'] = $params['coordinates'];
}
unset($params['coordinates']);
}
