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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Handles actions related to GIS GEOMETRYCOLLECTION objects
*
* @package PhpMyAdmin-GIS
*/
declare(strict_types=1);
namespace PhpMyAdmin\Gis;
use TCPDF;
/**
* Handles actions related to GIS GEOMETRYCOLLECTION objects
*
* @package PhpMyAdmin-GIS
*/
class GisGeometryCollection extends GisGeometry
{
// Hold the singleton instance of the class
private static $_instance;
/**
* A private constructor; prevents direct creation of object.
*
* @access private
*/
private function __construct()
{
}
/**
* Returns the singleton.
*
* @return GisGeometryCollection the singleton
* @access public
*/
public static function singleton()
{
if (! isset(self::$_instance)) {
self::$_instance = new GisGeometryCollection();
}
return self::$_instance;
}
/**
* Scales each row.
*
* @param string $spatial spatial data of a row
*
* @return array array containing the min, max values for x and y coordinates
* @access public
*/
public function scaleRow($spatial)
{
$min_max = [];
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$spatial,
19,
mb_strlen($spatial) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$scale_data = $gis_obj->scaleRow($sub_part);
// Update minimum/maximum values for x and y coordinates.
$c_maxX = (float) $scale_data['maxX'];
if (! isset($min_max['maxX']) || $c_maxX > $min_max['maxX']) {
$min_max['maxX'] = $c_maxX;
}
$c_minX = (float) $scale_data['minX'];
if (! isset($min_max['minX']) || $c_minX < $min_max['minX']) {
$min_max['minX'] = $c_minX;
}
$c_maxY = (float) $scale_data['maxY'];
if (! isset($min_max['maxY']) || $c_maxY > $min_max['maxY']) {
$min_max['maxY'] = $c_maxY;
}
$c_minY = (float) $scale_data['minY'];
if (! isset($min_max['minY']) || $c_minY < $min_max['minY']) {
$min_max['minY'] = $c_minY;
}
}
return $min_max;
}
/**
* Adds to the PNG image object, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS POLYGON object
* @param string|null $label Label for the GIS POLYGON object
* @param string $color Color for the GIS POLYGON object
* @param array $scale_data Array containing data related to scaling
* @param resource $image Image object
*
* @return resource the modified image object
* @access public
*/
public function prepareRowAsPng($spatial, ?string $label, $color, array $scale_data, $image)
{
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$spatial,
19,
mb_strlen($spatial) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$image = $gis_obj->prepareRowAsPng(
$sub_part,
$label,
$color,
$scale_data,
$image
);
}
return $image;
}
/**
* Adds to the TCPDF instance, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS GEOMETRYCOLLECTION object
* @param string|null $label label for the GIS GEOMETRYCOLLECTION object
* @param string $color color for the GIS GEOMETRYCOLLECTION object
* @param array $scale_data array containing data related to scaling
* @param TCPDF $pdf TCPDF instance
*
* @return TCPDF the modified TCPDF instance
* @access public
*/
public function prepareRowAsPdf($spatial, ?string $label, $color, array $scale_data, $pdf)
{
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$spatial,
19,
mb_strlen($spatial) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$pdf = $gis_obj->prepareRowAsPdf(
$sub_part,
$label,
$color,
$scale_data,
$pdf
);
}
return $pdf;
}
/**
* Prepares and returns the code related to a row in the GIS dataset as SVG.
*
* @param string $spatial GIS GEOMETRYCOLLECTION object
* @param string $label label for the GIS GEOMETRYCOLLECTION object
* @param string $color color for the GIS GEOMETRYCOLLECTION object
* @param array $scale_data array containing data related to scaling
*
* @return string the code related to a row in the GIS dataset
* @access public
*/
public function prepareRowAsSvg($spatial, $label, $color, array $scale_data)
{
$row = '';
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$spatial,
19,
mb_strlen($spatial) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$row .= $gis_obj->prepareRowAsSvg(
$sub_part,
$label,
$color,
$scale_data
);
}
return $row;
}
/**
* Prepares JavaScript related to a row in the GIS dataset
* to visualize it with OpenLayers.
*
* @param string $spatial GIS GEOMETRYCOLLECTION object
* @param int $srid spatial reference ID
* @param string $label label for the GIS GEOMETRYCOLLECTION object
* @param string $color color for the GIS GEOMETRYCOLLECTION object
* @param array $scale_data array containing data related to scaling
*
* @return string JavaScript related to a row in the GIS dataset
* @access public
*/
public function prepareRowAsOl($spatial, $srid, $label, $color, array $scale_data)
{
$row = '';
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$spatial,
19,
mb_strlen($spatial) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$row .= $gis_obj->prepareRowAsOl(
$sub_part,
$srid,
$label,
$color,
$scale_data
);
}
return $row;
}
/**
* Splits the GEOMETRYCOLLECTION object and get its constituents.
*
* @param string $geom_col geometry collection string
*
* @return array the constituents of the geometry collection object
* @access private
*/
private function _explodeGeomCol($geom_col)
{
$sub_parts = [];
$br_count = 0;
$start = 0;
$count = 0;
foreach (str_split($geom_col) as $char) {
if ($char == '(') {
$br_count++;
} elseif ($char == ')') {
$br_count--;
if ($br_count == 0) {
$sub_parts[]
= mb_substr(
$geom_col,
$start,
$count + 1 - $start
);
$start = $count + 2;
}
}
$count++;
}
return $sub_parts;
}
/**
* Generates the WKT with the set of parameters passed by the GIS editor.
*
* @param array $gis_data GIS data
* @param int $index index into the parameter object
* @param string $empty value for empty points
*
* @return string WKT with the set of parameters passed by the GIS editor
* @access public
*/
public function generateWkt(array $gis_data, $index, $empty = '')
{
$geom_count = isset($gis_data['GEOMETRYCOLLECTION']['geom_count'])
? $gis_data['GEOMETRYCOLLECTION']['geom_count'] : 1;
$wkt = 'GEOMETRYCOLLECTION(';
for ($i = 0; $i < $geom_count; $i++) {
if (isset($gis_data[$i]['gis_type'])) {
$type = $gis_data[$i]['gis_type'];
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$wkt .= $gis_obj->generateWkt($gis_data, $i, $empty) . ',';
}
}
if (isset($gis_data[0]['gis_type'])) {
$wkt
= mb_substr(
$wkt,
0,
mb_strlen($wkt) - 1
);
}
$wkt .= ')';
return $wkt;
}
/**
* Generates parameters for the GIS data editor from the value of the GIS column.
*
* @param string $value of the GIS column
*
* @return array parameters for the GIS editor from the value of the GIS column
* @access public
*/
public function generateParams($value)
{
$params = [];
$data = GisGeometry::generateParams($value);
$params['srid'] = $data['srid'];
$wkt = $data['wkt'];
// Trim to remove leading 'GEOMETRYCOLLECTION(' and trailing ')'
$goem_col
= mb_substr(
$wkt,
19,
mb_strlen($wkt) - 20
);
// Split the geometry collection object to get its constituents.
$sub_parts = $this->_explodeGeomCol($goem_col);
$params['GEOMETRYCOLLECTION']['geom_count'] = count($sub_parts);
$i = 0;
foreach ($sub_parts as $sub_part) {
$type_pos = mb_strpos($sub_part, '(');
if ($type_pos === false) {
continue;
}
$type = mb_substr($sub_part, 0, $type_pos);
/**
* @var GisMultiPolygon|GisPolygon|GisMultiPoint|GisPoint|GisMultiLineString|GisLineString $gis_obj
*/
$gis_obj = GisFactory::factory($type);
if (! $gis_obj) {
continue;
}
$params = array_merge($params, $gis_obj->generateParams($sub_part, $i));
$i++;
}
return $params;
}
}