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<?php |
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/* |
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* (c) Camptocamp <[email protected]> |
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* (c) Patrick Hayes |
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* |
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* This code is open-source and licenced under the Modified BSD License. |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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/** |
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* PHP Google Geocoder Adapter |
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* |
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* |
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* @package geoPHP |
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* @author Patrick Hayes <[email protected]> |
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*/ |
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class GoogleGeocode extends GeoAdapter |
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{ |
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/** |
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* Read an address string or array geometry objects |
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* |
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* @param string - Address to geocode |
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* @param string - Type of Geometry to return. Can either be 'points' or 'bounds' (polygon) |
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* @param Geometry|bounds-array - Limit the search area to within this region. For example |
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* by default geocoding "Cairo" will return the location of Cairo Egypt. |
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* If you pass a polygon of illinois, it will return Cairo IL. |
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* @param return_multiple - Return all results in a multipoint or multipolygon |
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* @return Geometry|GeometryCollection |
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*/ |
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public function read($address, $return_type = 'point', $bounds = FALSE, $return_multiple = FALSE) { |
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if (is_array($address)) $address = join(',', $address); |
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if (gettype($bounds) == 'object') { |
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$bounds = $bounds->getBBox(); |
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} |
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if (gettype($bounds) == 'array') { |
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$bounds_string = '&bounds='.$bounds['miny'].','.$bounds['minx'].'|'.$bounds['maxy'].','.$bounds['maxx']; |
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} |
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else { |
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$bounds_string = ''; |
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} |
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$url = "http://maps.googleapis.com/maps/api/geocode/json"; |
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$url .= '?address='. urlencode($address); |
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$url .= $bounds_string; |
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$url .= '&sensor=false'; |
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$this->result = json_decode(@file_get_contents($url)); |
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if ($this->result->status == 'OK') { |
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if ($return_multiple == FALSE) { |
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if ($return_type == 'point') { |
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return $this->getPoint(); |
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} |
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if ($return_type == 'bounds' || $return_type == 'polygon') { |
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return $this->getPolygon(); |
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} |
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} |
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if ($return_multiple == TRUE) { |
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if ($return_type == 'point') { |
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$points = array(); |
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foreach ($this->result->results as $delta => $item) { |
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$points[] = $this->getPoint($delta); |
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} |
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return new MultiPoint($points); |
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} |
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if ($return_type == 'bounds' || $return_type == 'polygon') { |
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$polygons = array(); |
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foreach ($this->result->results as $delta => $item) { |
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$polygons[] = $this->getPolygon($delta); |
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} |
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return new MultiPolygon($polygons); |
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} |
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} |
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} |
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else { |
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if ($this->result->status) throw new Exception('Error in Google Geocoder: '.$this->result->status); |
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else throw new Exception('Unknown error in Google Geocoder'); |
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return FALSE; |
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} |
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} |
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/** |
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* Serialize geometries into a WKT string. |
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* |
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* @param Geometry $geometry |
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* @param string $return_type Should be either 'string' or 'array' |
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* |
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* @return string Does a reverse geocode of the geometry |
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*/ |
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public function write(Geometry $geometry, $return_type = 'string') { |
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$centroid = $geometry->getCentroid(); |
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$lat = $centroid->getY(); |
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$lon = $centroid->getX(); |
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$url = "http://maps.googleapis.com/maps/api/geocode/json"; |
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$url .= '?latlng='.$lat.','.$lon; |
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$url .= '&sensor=false'; |
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$this->result = json_decode(@file_get_contents($url)); |
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if ($this->result->status == 'OK') { |
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if ($return_type == 'string') { |
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return $this->result->results[0]->formatted_address; |
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} |
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if ($return_type == 'array') { |
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return $this->result->results[0]->address_components; |
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} |
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} |
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else { |
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if ($this->result->status) throw new Exception('Error in Google Reverse Geocoder: '.$this->result->status); |
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else throw new Exception('Unknown error in Google Reverse Geocoder'); |
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return FALSE; |
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} |
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} |
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private function getPoint($delta = 0) { |
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$lat = $this->result->results[$delta]->geometry->location->lat; |
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$lon = $this->result->results[$delta]->geometry->location->lng; |
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return new Point($lon, $lat); |
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} |
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private function getPolygon($delta = 0) { |
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$points = array ( |
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$this->getTopLeft($delta), |
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$this->getTopRight($delta), |
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$this->getBottomRight($delta), |
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$this->getBottomLeft($delta), |
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$this->getTopLeft($delta), |
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); |
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$outer_ring = new LineString($points); |
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return new Polygon(array($outer_ring)); |
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} |
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private function getTopLeft($delta = 0) { |
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$lat = $this->result->results[$delta]->geometry->bounds->northeast->lat; |
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$lon = $this->result->results[$delta]->geometry->bounds->southwest->lng; |
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return new Point($lon, $lat); |
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} |
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private function getTopRight($delta = 0) { |
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$lat = $this->result->results[$delta]->geometry->bounds->northeast->lat; |
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$lon = $this->result->results[$delta]->geometry->bounds->northeast->lng; |
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return new Point($lon, $lat); |
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} |
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private function getBottomLeft($delta = 0) { |
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$lat = $this->result->results[$delta]->geometry->bounds->southwest->lat; |
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$lon = $this->result->results[$delta]->geometry->bounds->southwest->lng; |
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return new Point($lon, $lat); |
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} |
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private function getBottomRight($delta = 0) { |
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$lat = $this->result->results[$delta]->geometry->bounds->southwest->lat; |
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$lon = $this->result->results[$delta]->geometry->bounds->northeast->lng; |
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return new Point($lon, $lat); |
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} |
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} |
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Methods can only be called on objects. This check looks for methods being called on variables that have been inferred to never be objects.