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337 lines
10 KiB
337 lines
10 KiB
2 years ago
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<?php
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/**
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* Handles actions related to GIS POINT 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 hexdec;
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use function json_encode;
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use function mb_substr;
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use function round;
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use function trim;
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/**
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* Handles actions related to GIS POINT objects
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*/
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class GisPoint extends GisGeometry
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{
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/** @var self */
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private static $instance;
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/**
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* A private constructor; prevents direct creation of object.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return GisPoint the singleton
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*/
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public static function singleton()
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{
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if (! isset(self::$instance)) {
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self::$instance = new GisPoint();
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}
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return self::$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 $spatial spatial data of a row
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*
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* @return array an array containing the min, max values for x and y coordinates
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*/
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public function scaleRow($spatial)
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{
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($spatial, 6, -1);
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return $this->setMinMax($point, []);
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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 $point_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 $label,
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$point_color,
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array $scale_data,
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ImageWrapper $image
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): ImageWrapper {
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// allocate colors
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$black = $image->colorAllocate(0, 0, 0);
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$red = (int) hexdec(mb_substr($point_color, 1, 2));
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$green = (int) hexdec(mb_substr($point_color, 3, 2));
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$blue = (int) hexdec(mb_substr($point_color, 4, 2));
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$color = $image->colorAllocate($red, $green, $blue);
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$label = trim($label ?? '');
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($spatial, 6, -1);
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$points_arr = $this->extractPoints($point, $scale_data);
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// draw a small circle to mark the point
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$image->arc(
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(int) round($points_arr[0][0]),
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(int) round($points_arr[0][1]),
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7,
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7,
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0,
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360,
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$color
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);
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// print label if applicable
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if ($label !== '') {
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$image->string(
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1,
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(int) round($points_arr[0][0]),
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(int) round($points_arr[0][1]),
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$label,
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$black
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);
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}
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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 POINT object
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* @param string|null $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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* @param TCPDF $pdf TCPDF instance
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*
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* @return TCPDF the modified TCPDF instance
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*/
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public function prepareRowAsPdf(
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$spatial,
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?string $label,
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$point_color,
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array $scale_data,
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$pdf
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) {
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// allocate colors
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$red = hexdec(mb_substr($point_color, 1, 2));
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$green = hexdec(mb_substr($point_color, 3, 2));
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$blue = hexdec(mb_substr($point_color, 4, 2));
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$line = [
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'width' => 1.25,
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'color' => [
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$red,
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$green,
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$blue,
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],
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];
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$label = trim($label ?? '');
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($spatial, 6, -1);
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$points_arr = $this->extractPoints($point, $scale_data);
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// draw a small circle to mark the point
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$pdf->Circle($points_arr[0][0], $points_arr[0][1], 2, 0, 360, 'D', $line);
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// print label if applicable
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if ($label !== '') {
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$pdf->SetXY($points_arr[0][0], $points_arr[0][1]);
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$pdf->SetFontSize(5);
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$pdf->Cell(0, 0, $label);
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}
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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 POINT object
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* @param string $label Label for the GIS POINT object
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* @param string $point_color Color for the GIS POINT 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, $point_color, array $scale_data)
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{
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$point_options = [
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'name' => $label,
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'id' => $label . $this->getRandomId(),
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'class' => 'point vector',
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'fill' => 'white',
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'stroke' => $point_color,
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'stroke-width' => 2,
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];
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($spatial, 6, -1);
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$points_arr = $this->extractPoints($point, $scale_data);
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$row = '';
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if (((float) $points_arr[0][0]) !== 0.0 && ((float) $points_arr[0][1]) !== 0.0) {
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$row .= '<circle cx="' . $points_arr[0][0]
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. '" cy="' . $points_arr[0][1] . '" r="3"';
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foreach ($point_options as $option => $val) {
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$row .= ' ' . $option . '="' . trim((string) $val) . '"';
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}
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$row .= '/>';
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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 POINT object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS POINT object
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* @param array $point_color Color for the GIS POINT object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return string JavaScript related to a row in the GIS dataset
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*/
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public function prepareRowAsOl(
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$spatial,
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int $srid,
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$label,
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$point_color,
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array $scale_data
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) {
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$fill_style = ['color' => 'white'];
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$stroke_style = [
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'color' => $point_color,
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'width' => 2,
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];
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$result = 'var fill = new ol.style.Fill(' . json_encode($fill_style) . ');'
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. 'var stroke = new ol.style.Stroke(' . json_encode($stroke_style) . ');'
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. 'var style = new ol.style.Style({'
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. 'image: new ol.style.Circle({'
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. 'fill: fill,'
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. 'stroke: stroke,'
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. 'radius: 3'
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. '}),'
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. 'fill: fill,'
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. 'stroke: stroke';
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if (trim($label) !== '') {
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$text_style = [
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'text' => trim($label),
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'offsetY' => -9,
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];
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$result .= ',text: new ol.style.Text(' . json_encode($text_style) . ')';
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}
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$result .= '});';
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if ($srid === 0) {
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$srid = 4326;
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}
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$result .= $this->getBoundsForOl($srid, $scale_data);
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($spatial, 6, -1);
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$points_arr = $this->extractPoints($point, null);
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if ($points_arr[0][0] != '' && $points_arr[0][1] != '') {
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$result .= 'var point = new ol.Feature({geometry: '
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. $this->getPointForOpenLayers($points_arr[0], $srid) . '});'
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. 'point.setStyle(style);'
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. 'vectorLayer.addFeature(point);';
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}
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return $result;
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}
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/**
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* Generate 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 Point does not adhere to this parameter
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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, $empty = '')
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{
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return 'POINT('
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. (isset($gis_data[$index]['POINT']['x'])
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&& trim((string) $gis_data[$index]['POINT']['x']) != ''
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? $gis_data[$index]['POINT']['x'] : '')
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. ' '
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. (isset($gis_data[$index]['POINT']['y'])
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&& trim((string) $gis_data[$index]['POINT']['y']) != ''
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? $gis_data[$index]['POINT']['y'] : '') . ')';
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}
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/**
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* Generate the WKT for the data from ESRI shape files.
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*
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* @param array $row_data GIS data
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*
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* @return string the WKT for the data from ESRI shape files
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*/
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public function getShape(array $row_data)
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{
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return 'POINT(' . ($row_data['x'] ?? '')
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. ' ' . ($row_data['y'] ?? '') . ')';
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}
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/**
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* Generate 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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* @param int $index of the geometry
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*
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* @return array params for the GIS data editor from the value of the GIS column
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*/
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public function generateParams($value, $index = -1)
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{
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$params = [];
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if ($index == -1) {
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$index = 0;
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$data = GisGeometry::generateParams($value);
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$params['srid'] = $data['srid'];
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$wkt = $data['wkt'];
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} else {
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$params[$index]['gis_type'] = 'POINT';
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$wkt = $value;
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}
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// Trim to remove leading 'POINT(' and trailing ')'
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$point = mb_substr($wkt, 6, -1);
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$points_arr = $this->extractPoints($point, null);
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$params[$index]['POINT']['x'] = $points_arr[0][0];
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$params[$index]['POINT']['y'] = $points_arr[0][1];
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return $params;
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}
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}
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