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