Current File : /www/loslex/production/vendor/phayes/geophp/lib/adapters/WKT.class.php
<?php
/**
* WKT (Well Known Text) Adapter
*/
class WKT extends GeoAdapter
{
/**
* Read WKT string into geometry objects
*
* @param string $WKT A WKT string
*
* @return Geometry
*/
public function read($wkt) {
$wkt = trim($wkt);
// If it contains a ';', then it contains additional SRID data
if (strpos($wkt,';')) {
$parts = explode(';', $wkt);
$wkt = $parts[1];
$eparts = explode('=',$parts[0]);
$srid = $eparts[1];
}
else {
$srid = NULL;
}
// If geos is installed, then we take a shortcut and let it parse the WKT
if (geoPHP::geosInstalled()) {
$reader = new GEOSWKTReader();
if ($srid) {
$geom = geoPHP::geosToGeometry($reader->read($wkt));
$geom->setSRID($srid);
return $geom;
}
else {
return geoPHP::geosToGeometry($reader->read($wkt));
}
}
$wkt = str_replace(', ', ',', $wkt);
// For each geometry type, check to see if we have a match at the
// beginning of the string. If we do, then parse using that type
foreach (geoPHP::geometryList() as $geom_type) {
$wkt_geom = strtoupper($geom_type);
if (strtoupper(substr($wkt, 0, strlen($wkt_geom))) == $wkt_geom) {
$data_string = $this->getDataString($wkt);
$method = 'parse'.$geom_type;
if ($srid) {
$geom = $this->$method($data_string);
$geom->setSRID($srid);
return $geom;
}
else {
return $this->$method($data_string);
}
}
}
}
private function parsePoint($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty point
if ($data_string == 'EMPTY') return new Point();
$parts = explode(' ',$data_string);
return new Point($parts[0], $parts[1]);
}
private function parseLineString($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty line
if ($data_string == 'EMPTY') return new LineString();
$parts = explode(',',$data_string);
$points = array();
foreach ($parts as $part) {
$points[] = $this->parsePoint($part);
}
return new LineString($points);
}
private function parsePolygon($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty polygon
if ($data_string == 'EMPTY') return new Polygon();
$parts = explode('),(',$data_string);
$lines = array();
foreach ($parts as $part) {
if (!$this->beginsWith($part,'(')) $part = '(' . $part;
if (!$this->endsWith($part,')')) $part = $part . ')';
$lines[] = $this->parseLineString($part);
}
return new Polygon($lines);
}
private function parseMultiPoint($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty MutiPoint
if ($data_string == 'EMPTY') return new MultiPoint();
$parts = explode(',',$data_string);
$points = array();
foreach ($parts as $part) {
$points[] = $this->parsePoint($part);
}
return new MultiPoint($points);
}
private function parseMultiLineString($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty multi-linestring
if ($data_string == 'EMPTY') return new MultiLineString();
$parts = explode('),(',$data_string);
$lines = array();
foreach ($parts as $part) {
// Repair the string if the explode broke it
if (!$this->beginsWith($part,'(')) $part = '(' . $part;
if (!$this->endsWith($part,')')) $part = $part . ')';
$lines[] = $this->parseLineString($part);
}
return new MultiLineString($lines);
}
private function parseMultiPolygon($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty multi-polygon
if ($data_string == 'EMPTY') return new MultiPolygon();
$parts = explode(')),((',$data_string);
$polys = array();
foreach ($parts as $part) {
// Repair the string if the explode broke it
if (!$this->beginsWith($part,'((')) $part = '((' . $part;
if (!$this->endsWith($part,'))')) $part = $part . '))';
$polys[] = $this->parsePolygon($part);
}
return new MultiPolygon($polys);
}
private function parseGeometryCollection($data_string) {
$data_string = $this->trimParens($data_string);
// If it's marked as empty, then return an empty geom-collection
if ($data_string == 'EMPTY') return new GeometryCollection();
$geometries = array();
$matches = array();
$str = preg_replace('/,\s*([A-Za-z])/', '|$1', $data_string);
$components = explode('|', trim($str));
foreach ($components as $component) {
$geometries[] = $this->read($component);
}
return new GeometryCollection($geometries);
}
protected function getDataString($wkt) {
$first_paren = strpos($wkt, '(');
if ($first_paren !== FALSE) {
return substr($wkt, $first_paren);
} elseif (strstr($wkt,'EMPTY')) {
return 'EMPTY';
} else
return FALSE;
}
/**
* Trim the parenthesis and spaces
*/
protected function trimParens($str) {
$str = trim($str);
// We want to only strip off one set of parenthesis
if ($this->beginsWith($str, '(')) {
return substr($str,1,-1);
}
else return $str;
}
protected function beginsWith($str, $char) {
if (substr($str,0,strlen($char)) == $char) return TRUE;
else return FALSE;
}
protected function endsWith($str, $char) {
if (substr($str,(0 - strlen($char))) == $char) return TRUE;
else return FALSE;
}
/**
* Serialize geometries into a WKT string.
*
* @param Geometry $geometry
*
* @return string The WKT string representation of the input geometries
*/
public function write(Geometry $geometry) {
// If geos is installed, then we take a shortcut and let it write the WKT
if (geoPHP::geosInstalled()) {
$writer = new GEOSWKTWriter();
$writer->setTrim(TRUE);
return $writer->write($geometry->geos());
}
if ($geometry->isEmpty()) {
return strtoupper($geometry->geometryType()).' EMPTY';
}
else if ($data = $this->extractData($geometry)) {
return strtoupper($geometry->geometryType()).' ('.$data.')';
}
}
/**
* Extract geometry to a WKT string
*
* @param Geometry $geometry A Geometry object
*
* @return string
*/
public function extractData($geometry) {
$parts = array();
switch ($geometry->geometryType()) {
case 'Point':
return $geometry->getX().' '.$geometry->getY();
case 'LineString':
foreach ($geometry->getComponents() as $component) {
$parts[] = $this->extractData($component);
}
return implode(', ', $parts);
case 'Polygon':
case 'MultiPoint':
case 'MultiLineString':
case 'MultiPolygon':
foreach ($geometry->getComponents() as $component) {
$parts[] = '('.$this->extractData($component).')';
}
return implode(', ', $parts);
case 'GeometryCollection':
foreach ($geometry->getComponents() as $component) {
$parts[] = strtoupper($component->geometryType()).' ('.$this->extractData($component).')';
}
return implode(', ', $parts);
}
}
}
Mini Shell