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