383 lines
12 KiB
PHP
383 lines
12 KiB
PHP
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<?php
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/**
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* Base class for all GIS data type classes
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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 explode;
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use function floatval;
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use function mb_strripos;
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use function mb_substr;
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use function mt_getrandmax;
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use function preg_match;
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use function random_int;
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use function sprintf;
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use function str_replace;
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use function trim;
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/**
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* Base class for all GIS data type classes.
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*/
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abstract class GisGeometry
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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 data object
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* @param string $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data data related to scaling
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*
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* @return string the code related to a row in the GIS dataset
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*/
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abstract public function prepareRowAsSvg($spatial, $label, $color, array $scale_data);
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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 $scale_data Array containing data related to scaling
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*/
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abstract public function prepareRowAsPng(
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$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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/**
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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 data object
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* @param string|null $label label for the GIS data object
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* @param string $color color for the GIS data object
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* @param array $scale_data array containing data related to scaling
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* @param TCPDF $pdf TCPDF instance
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*
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* @return TCPDF the modified TCPDF instance
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*/
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abstract public function prepareRowAsPdf(
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$spatial,
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?string $label,
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$color,
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array $scale_data,
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$pdf
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);
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/**
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* Prepares the 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 data object
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* @param int $srid spatial reference ID
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* @param string $label label for the GIS data object
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* @param array $color color for the GIS data object
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* @param array $scale_data array containing data related to scaling
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*
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* @return string the JavaScript related to a row in the GIS dataset
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*/
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abstract public function prepareRowAsOl(
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$spatial,
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int $srid,
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$label,
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$color,
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array $scale_data
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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 $spatial spatial data of a row
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*
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* @return array array containing the min, max values for x and y coordinates
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*/
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abstract public function scaleRow($spatial);
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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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abstract public function generateWkt(array $gis_data, $index, $empty = '');
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/**
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* Returns OpenLayers.Bounds object that correspond to the bounds of GIS data.
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*
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* @param int $srid spatial reference ID
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* @param array $scale_data data related to scaling
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*
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* @return string OpenLayers.Bounds object that
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* correspond to the bounds of GIS data
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*/
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protected function getBoundsForOl(int $srid, array $scale_data)
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{
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return sprintf(
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'var minLoc = [%s, %s];'
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. 'var maxLoc = [%s, %s];'
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. 'var ext = ol.extent.boundingExtent([minLoc, maxLoc]);'
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. 'ext = ol.proj.transformExtent(ext, ol.proj.get("EPSG:%s"), ol.proj.get(\'EPSG:3857\'));'
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. 'map.getView().fit(ext, map.getSize());',
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$scale_data['minX'],
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$scale_data['minY'],
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$scale_data['maxX'],
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$scale_data['maxY'],
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$srid
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);
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}
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/**
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* Updates the min, max values with the given point set.
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*
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* @param string $point_set point set
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* @param array $min_max existing min, max values
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*
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* @return array the updated min, max values
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*/
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protected function setMinMax($point_set, array $min_max)
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{
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// Separate each point
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$points = explode(',', $point_set);
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foreach ($points as $point) {
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// Extract coordinates of the point
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$cordinates = explode(' ', $point);
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$x = (float) $cordinates[0];
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if (! isset($min_max['maxX']) || $x > $min_max['maxX']) {
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$min_max['maxX'] = $x;
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}
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if (! isset($min_max['minX']) || $x < $min_max['minX']) {
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$min_max['minX'] = $x;
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}
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$y = (float) $cordinates[1];
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if (! isset($min_max['maxY']) || $y > $min_max['maxY']) {
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$min_max['maxY'] = $y;
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}
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if (isset($min_max['minY']) && $y >= $min_max['minY']) {
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continue;
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}
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$min_max['minY'] = $y;
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}
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return $min_max;
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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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* This method performs common work.
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* More specific work is performed by each of the geom classes.
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*
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* @param string $value value of the GIS column
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*
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* @return array parameters for the GIS editor from the value of the GIS column
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*/
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public function generateParams($value)
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{
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$geom_types = '(POINT|MULTIPOINT|LINESTRING|MULTILINESTRING|POLYGON|MULTIPOLYGON|GEOMETRYCOLLECTION)';
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$srid = 0;
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$wkt = '';
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if (preg_match("/^'" . $geom_types . "\(.*\)',[0-9]*$/i", $value)) {
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$last_comma = mb_strripos($value, ',');
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$srid = (int) trim(mb_substr($value, $last_comma + 1));
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$wkt = trim(mb_substr($value, 1, $last_comma - 2));
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} elseif (preg_match('/^' . $geom_types . '\(.*\)$/i', $value)) {
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$wkt = $value;
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}
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return [
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'srid' => $srid,
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'wkt' => $wkt,
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];
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}
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/**
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* Extracts points, scales and returns them as an array.
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*
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* @param string $point_set string of comma separated points
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* @param array|null $scale_data data related to scaling
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* @param bool $linear if true, as a 1D array, else as a 2D array
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*
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* @return array scaled points
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*/
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protected function extractPoints($point_set, $scale_data, $linear = false): array
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{
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$points_arr = [];
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// Separate each point
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$points = explode(',', $point_set);
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foreach ($points as $point) {
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$point = str_replace(['(', ')'], '', $point);
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// Extract coordinates of the point
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$coordinates = explode(' ', $point);
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if (isset($coordinates[0], $coordinates[1]) && trim($coordinates[0]) != '' && trim($coordinates[1]) != '') {
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if ($scale_data != null) {
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$x = ($coordinates[0] - $scale_data['x']) * $scale_data['scale'];
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$y = $scale_data['height']
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- ($coordinates[1] - $scale_data['y']) * $scale_data['scale'];
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} else {
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$x = floatval(trim($coordinates[0]));
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$y = floatval(trim($coordinates[1]));
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}
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} else {
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$x = 0;
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$y = 0;
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}
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if (! $linear) {
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$points_arr[] = [
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$x,
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$y,
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];
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} else {
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$points_arr[] = $x;
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$points_arr[] = $y;
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}
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}
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return $points_arr;
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}
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/**
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* Generates JavaScript for adding an array of polygons to OpenLayers.
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*
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* @param array $polygons x and y coordinates for each polygon
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* @param int $srid spatial reference id
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*
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* @return string JavaScript for adding an array of polygons to OpenLayers
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*/
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protected function getPolygonArrayForOpenLayers(array $polygons, int $srid)
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{
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$ol_array = 'var polygonArray = [];';
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foreach ($polygons as $polygon) {
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$rings = explode('),(', $polygon);
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$ol_array .= $this->getPolygonForOpenLayers($rings, $srid);
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$ol_array .= 'polygonArray.push(polygon);';
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}
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return $ol_array;
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}
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/**
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* Generates JavaScript for adding points for OpenLayers polygon.
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*
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* @param array $polygon x and y coordinates for each line
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* @param int $srid spatial reference id
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*
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* @return string JavaScript for adding points for OpenLayers polygon
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*/
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protected function getPolygonForOpenLayers(array $polygon, int $srid)
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{
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return $this->getLineArrayForOpenLayers($polygon, $srid, false)
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. 'var polygon = new ol.geom.Polygon(arr);';
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}
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/**
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* Generates JavaScript for adding an array of LineString
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* or LineRing to OpenLayers.
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*
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* @param array $lines x and y coordinates for each line
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* @param int $srid spatial reference id
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* @param bool $is_line_string whether it's an array of LineString
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*
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* @return string JavaScript for adding an array of LineString
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* or LineRing to OpenLayers
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*/
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protected function getLineArrayForOpenLayers(
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array $lines,
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int $srid,
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$is_line_string = true
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) {
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$ol_array = 'var arr = [];';
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foreach ($lines as $line) {
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$ol_array .= 'var lineArr = [];';
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$points_arr = $this->extractPoints($line, null);
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$ol_array .= 'var line = ' . $this->getLineForOpenLayers($points_arr, $srid, $is_line_string) . ';';
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$ol_array .= 'var coord = line.getCoordinates();';
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$ol_array .= 'for (var i = 0; i < coord.length; i++) lineArr.push(coord[i]);';
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$ol_array .= 'arr.push(lineArr);';
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}
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return $ol_array;
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}
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/**
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* Generates JavaScript for adding a LineString or LineRing to OpenLayers.
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*
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* @param array $points_arr x and y coordinates for each point
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* @param int $srid spatial reference id
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* @param bool $is_line_string whether it's a LineString
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*
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* @return string JavaScript for adding a LineString or LineRing to OpenLayers
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*/
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protected function getLineForOpenLayers(
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array $points_arr,
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int $srid,
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$is_line_string = true
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) {
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return 'new ol.geom.'
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. ($is_line_string ? 'LineString' : 'LinearRing') . '('
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. $this->getPointsArrayForOpenLayers($points_arr, $srid)
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. ')';
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}
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/**
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* Generates JavaScript for adding an array of points to OpenLayers.
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*
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* @param array $points_arr x and y coordinates for each point
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* @param int $srid spatial reference id
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*
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* @return string JavaScript for adding an array of points to OpenLayers
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*/
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protected function getPointsArrayForOpenLayers(array $points_arr, int $srid)
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{
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$ol_array = 'new Array(';
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foreach ($points_arr as $point) {
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$ol_array .= $this->getPointForOpenLayers($point, $srid) . '.getCoordinates(), ';
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}
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$ol_array = mb_substr($ol_array, 0, -2);
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return $ol_array . ')';
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}
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/**
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* Generates JavaScript for adding a point to OpenLayers.
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*
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* @param array $point array containing the x and y coordinates of the point
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* @param int $srid spatial reference id
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*
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* @return string JavaScript for adding points to OpenLayers
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*/
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protected function getPointForOpenLayers(array $point, int $srid)
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{
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return '(new ol.geom.Point([' . $point[0] . ',' . $point[1] . '])'
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. '.transform(ol.proj.get("EPSG:' . $srid . '")'
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. ', ol.proj.get(\'EPSG:3857\')))';
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}
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protected function getRandomId(): int
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{
|
||
|
|
return random_int(0, mt_getrandmax());
|
||
|
|
}
|
||
|
|
}
|