Viewing file:  GisMultiPoint.php (13.27 KB) -rw-r--r--
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<?php
/**
* Handles actions related to GIS MULTIPOINT objects
*/
declare(strict_types=1);
namespace PhpMyAdmin\Gis;
use TCPDF;
use function count;
use function hexdec;
use function imagearc;
use function imagecolorallocate;
use function imagestring;
use function json_encode;
use function mb_strlen;
use function mb_substr;
use function trim;
/**
* Handles actions related to GIS MULTIPOINT objects
*/
class GisMultiPoint extends GisGeometry
{
/** @var self */
private static $instance;
/**
* A private constructor; prevents direct creation of object.
*
* @access private
*/
private function __construct()
{
}
/**
* Returns the singleton.
*
* @return GisMultiPoint the singleton
*
* @access public
*/
public static function singleton()
{
if (! isset(self::$instance)) {
self::$instance = new GisMultiPoint();
}
return self::$instance;
}
/**
* Scales each row.
*
* @param string $spatial spatial data of a row
*
* @return array an array containing the min, max values for x and y coordinates
*
* @access public
*/
public function scaleRow($spatial)
{
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$multipoint
= mb_substr(
$spatial,
11,
mb_strlen($spatial) - 12
);
return $this->setMinMax($multipoint, []);
}
/**
* 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
* @param resource $image Image object
*
* @return resource the modified image object
*
* @access public
*/
public function prepareRowAsPng(
$spatial,
?string $label,
$point_color,
array $scale_data,
$image
) {
// allocate colors
$black = imagecolorallocate($image, 0, 0, 0);
$red = hexdec(mb_substr($point_color, 1, 2));
$green = hexdec(mb_substr($point_color, 3, 2));
$blue = hexdec(mb_substr($point_color, 4, 2));
$color = imagecolorallocate($image, $red, $green, $blue);
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$multipoint
= mb_substr(
$spatial,
11,
mb_strlen($spatial) - 12
);
$points_arr = $this->extractPoints($multipoint, $scale_data);
foreach ($points_arr as $point) {
// draw a small circle to mark the point
if ($point[0] == '' || $point[1] == '') {
continue;
}
imagearc($image, (int) $point[0], (int) $point[1], 7, 7, 0, 360, $color);
}
// print label for each point
if ((isset($label) && trim($label) != '')
&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
) {
imagestring(
$image,
1,
$points_arr[0][0],
$points_arr[0][1],
trim($label),
$black
);
}
return $image;
}
/**
* Adds to the TCPDF instance, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS MULTIPOINT object
* @param string|null $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT 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,
$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,
],
];
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$multipoint
= mb_substr(
$spatial,
11,
mb_strlen($spatial) - 12
);
$points_arr = $this->extractPoints($multipoint, $scale_data);
foreach ($points_arr as $point) {
// draw a small circle to mark the point
if ($point[0] == '' || $point[1] == '') {
continue;
}
$pdf->Circle($point[0], $point[1], 2, 0, 360, 'D', $line);
}
// print label for each point
if ((isset($label) && trim($label) != '')
&& ($points_arr[0][0] != '' && $points_arr[0][1] != '')
) {
$pdf->SetXY($points_arr[0][0], $points_arr[0][1]);
$pdf->SetFontSize(5);
$pdf->Cell(0, 0, trim($label));
}
return $pdf;
}
/**
* Prepares and returns the code related to a row in the GIS dataset as SVG.
*
* @param string $spatial GIS MULTIPOINT object
* @param string $label Label for the GIS MULTIPOINT object
* @param string $point_color Color for the GIS MULTIPOINT 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, $point_color, array $scale_data)
{
$point_options = [
'name' => $label,
'class' => 'multipoint vector',
'fill' => 'white',
'stroke' => $point_color,
'stroke-width' => 2,
];
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$multipoint
= mb_substr(
$spatial,
11,
mb_strlen($spatial) - 12
);
$points_arr = $this->extractPoints($multipoint, $scale_data);
$row = '';
foreach ($points_arr as $point) {
if (((float) $point[0]) === 0.0 || ((float) $point[1]) === 0.0) {
continue;
}
$row .= '<circle cx="' . $point[0] . '" cy="'
. $point[1] . '" r="3"';
$point_options['id'] = $label . $this->getRandomId();
foreach ($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 MULTIPOINT object
* @param int $srid Spatial reference ID
* @param string $label Label for the GIS MULTIPOINT object
* @param array $point_color Color for the GIS MULTIPOINT 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,
$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($stroke_style) . ');'
. 'var style = new ol.style.Style({'
. 'image: new ol.style.Circle({'
. 'fill: fill,'
. 'stroke: stroke,'
. 'radius: 3'
. '}),'
. 'fill: fill,'
. 'stroke: stroke';
if ($label) {
$text_style = [
'text' => $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 'MULTIPOINT(' and trailing ')'
$multipoint
= mb_substr(
$spatial,
11,
mb_strlen($spatial) - 12
);
$points_arr = $this->extractPoints($multipoint, null);
return $result . 'var multiPoint = new ol.geom.MultiPoint('
. $this->getPointsArrayForOpenLayers($points_arr, $srid) . ');'
. 'var feature = new ol.Feature({geometry: multiPoint});'
. 'feature.setStyle(style);'
. 'vectorLayer.addFeature(feature);';
}
/**
* 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 $empty Multipoint does not adhere to this
*
* @return string WKT with the set of parameters passed by the GIS editor
*
* @access public
*/
public function generateWkt(array $gis_data, $index, $empty = '')
{
$no_of_points = $gis_data[$index]['MULTIPOINT']['no_of_points'] ?? 1;
if ($no_of_points < 1) {
$no_of_points = 1;
}
$wkt = 'MULTIPOINT(';
for ($i = 0; $i < $no_of_points; $i++) {
$wkt .= (isset($gis_data[$index]['MULTIPOINT'][$i]['x'])
&& trim((string) $gis_data[$index]['MULTIPOINT'][$i]['x']) != ''
? $gis_data[$index]['MULTIPOINT'][$i]['x'] : '')
. ' ' . (isset($gis_data[$index]['MULTIPOINT'][$i]['y'])
&& trim((string) $gis_data[$index]['MULTIPOINT'][$i]['y']) != ''
? $gis_data[$index]['MULTIPOINT'][$i]['y'] : '') . ',';
}
$wkt
= mb_substr(
$wkt,
0,
mb_strlen($wkt) - 1
);
return $wkt . ')';
}
/**
* 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
*
* @access public
*/
public function getShape(array $row_data)
{
$wkt = 'MULTIPOINT(';
for ($i = 0; $i < $row_data['numpoints']; $i++) {
$wkt .= $row_data['points'][$i]['x'] . ' '
. $row_data['points'][$i]['y'] . ',';
}
$wkt
= mb_substr(
$wkt,
0,
mb_strlen($wkt) - 1
);
return $wkt . ')';
}
/**
* Generate parameters for the GIS data editor from the value of the GIS column.
*
* @param string $value Value of the GIS column
* @param int $index Index of the geometry
*
* @return array params for the GIS data editor from the value of the GIS column
*
* @access public
*/
public function generateParams($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'] = 'MULTIPOINT';
$wkt = $value;
}
// Trim to remove leading 'MULTIPOINT(' and trailing ')'
$points
= mb_substr(
$wkt,
11,
mb_strlen($wkt) - 12
);
$points_arr = $this->extractPoints($points, null);
$no_of_points = count($points_arr);
$params[$index]['MULTIPOINT']['no_of_points'] = $no_of_points;
for ($i = 0; $i < $no_of_points; $i++) {
$params[$index]['MULTIPOINT'][$i]['x'] = $points_arr[$i][0];
$params[$index]['MULTIPOINT'][$i]['y'] = $points_arr[$i][1];
}
return $params;
}
/**
* Overridden to make sure that only the points having valid values
* for x and y coordinates are added.
*
* @param array $points_arr x and y coordinates for each point
* @param string $srid spatial reference id
*
* @return string JavaScript for adding an array of points to OpenLayers
*
* @access protected
*/
protected function getPointsArrayForOpenLayers(array $points_arr, $srid)
{
$ol_array = 'new Array(';
foreach ($points_arr as $point) {
if ($point[0] == '' || $point[1] == '') {
continue;
}
$ol_array .= $this->getPointForOpenLayers($point, $srid) . '.getCoordinates(), ';
}
$olArrayLength = mb_strlen($ol_array);
if (mb_substr($ol_array, $olArrayLength - 2) === ', ') {
$ol_array = mb_substr($ol_array, 0, $olArrayLength - 2);
}
return $ol_array . ')';
}
}
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