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<?php
/**
* Handles actions related to GIS MULTILINESTRING objects
*/
declare(strict_types=1);
namespace PhpMyAdmin\Gis;
use PhpMyAdmin\Image\ImageWrapper;
use TCPDF;
use function count;
use function explode;
use function hexdec;
use function json_encode;
use function mb_substr;
use function round;
use function trim;
/**
* Handles actions related to GIS MULTILINESTRING objects
*/
class GisMultiLineString extends GisGeometry
{
/** @var self */
private static $instance;
/**
* A private constructor; prevents direct creation of object.
*/
private function __construct()
{
}
/**
* Returns the singleton.
*
* @return GisMultiLineString the singleton
*/
public static function singleton()
{
if (! isset(self::$instance)) {
self::$instance = new GisMultiLineString();
}
return self::$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)
{
$min_max = [];
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($spatial, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
foreach ($linestirngs as $linestring) {
$min_max = $this->setMinMax($linestring, $min_max);
}
return $min_max;
}
/**
* 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 $line_color Color for the GIS POLYGON object
* @param array $scale_data Array containing data related to scaling
*/
public function prepareRowAsPng(
$spatial,
?string $label,
$line_color,
array $scale_data,
ImageWrapper $image
): ImageWrapper {
// allocate colors
$black = $image->colorAllocate(0, 0, 0);
$red = (int) hexdec(mb_substr($line_color, 1, 2));
$green = (int) hexdec(mb_substr($line_color, 3, 2));
$blue = (int) hexdec(mb_substr($line_color, 4, 2));
$color = $image->colorAllocate($red, $green, $blue);
$label = trim($label ?? '');
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($spatial, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
$first_line = true;
foreach ($linestirngs as $linestring) {
$points_arr = $this->extractPoints($linestring, $scale_data);
foreach ($points_arr as $point) {
if (isset($temp_point)) {
// draw line section
$image->line(
(int) round($temp_point[0]),
(int) round($temp_point[1]),
(int) round($point[0]),
(int) round($point[1]),
$color
);
}
$temp_point = $point;
}
unset($temp_point);
// print label if applicable
if ($label !== '' && $first_line) {
$image->string(
1,
(int) round($points_arr[1][0]),
(int) round($points_arr[1][1]),
$label,
$black
);
}
$first_line = false;
}
return $image;
}
/**
* Adds to the TCPDF instance, the data related to a row in the GIS dataset.
*
* @param string $spatial GIS MULTILINESTRING object
* @param string|null $label Label for the GIS MULTILINESTRING object
* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, array $scale_data, $pdf)
{
// allocate colors
$red = hexdec(mb_substr($line_color, 1, 2));
$green = hexdec(mb_substr($line_color, 3, 2));
$blue = hexdec(mb_substr($line_color, 4, 2));
$line = [
'width' => 1.5,
'color' => [
$red,
$green,
$blue,
],
];
$label = trim($label ?? '');
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($spatial, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
$first_line = true;
foreach ($linestirngs as $linestring) {
$points_arr = $this->extractPoints($linestring, $scale_data);
foreach ($points_arr as $point) {
if (isset($temp_point)) {
// draw line section
$pdf->Line($temp_point[0], $temp_point[1], $point[0], $point[1], $line);
}
$temp_point = $point;
}
unset($temp_point);
// print label
if ($label !== '' && $first_line) {
$pdf->SetXY($points_arr[1][0], $points_arr[1][1]);
$pdf->SetFontSize(5);
$pdf->Cell(0, 0, $label);
}
$first_line = false;
}
return $pdf;
}
/**
* Prepares and returns the code related to a row in the GIS dataset as SVG.
*
* @param string $spatial GIS MULTILINESTRING object
* @param string $label Label for the GIS MULTILINESTRING object
* @param string $line_color Color for the GIS MULTILINESTRING 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, $line_color, array $scale_data)
{
$line_options = [
'name' => $label,
'class' => 'linestring vector',
'fill' => 'none',
'stroke' => $line_color,
'stroke-width' => 2,
];
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($spatial, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
$row = '';
foreach ($linestirngs as $linestring) {
$points_arr = $this->extractPoints($linestring, $scale_data);
$row .= '<polyline points="';
foreach ($points_arr as $point) {
$row .= $point[0] . ',' . $point[1] . ' ';
}
$row .= '"';
$line_options['id'] = $label . $this->getRandomId();
foreach ($line_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 MULTILINESTRING object
* @param int $srid Spatial reference ID
* @param string $label Label for the GIS MULTILINESTRING object
* @param array $line_color Color for the GIS MULTILINESTRING 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, $line_color, array $scale_data)
{
$stroke_style = [
'color' => $line_color,
'width' => 2,
];
$row = 'var style = new ol.style.Style({'
. 'stroke: new ol.style.Stroke(' . json_encode($stroke_style) . ')';
if (trim($label) !== '') {
$text_style = ['text' => trim($label)];
$row .= ', text: new ol.style.Text(' . json_encode($text_style) . ')';
}
$row .= '});';
if ($srid === 0) {
$srid = 4326;
}
$row .= $this->getBoundsForOl($srid, $scale_data);
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($spatial, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
return $row . $this->getLineArrayForOpenLayers($linestirngs, $srid)
. 'var multiLineString = new ol.geom.MultiLineString(arr);'
. 'var feature = new ol.Feature({geometry: multiLineString});'
. '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|null $empty Value for empty points
*
* @return string WKT with the set of parameters passed by the GIS editor
*/
public function generateWkt(array $gis_data, $index, $empty = '')
{
$data_row = $gis_data[$index]['MULTILINESTRING'];
$no_of_lines = $data_row['no_of_lines'] ?? 1;
if ($no_of_lines < 1) {
$no_of_lines = 1;
}
$wkt = 'MULTILINESTRING(';
for ($i = 0; $i < $no_of_lines; $i++) {
$no_of_points = $data_row[$i]['no_of_points'] ?? 2;
if ($no_of_points < 2) {
$no_of_points = 2;
}
$wkt .= '(';
for ($j = 0; $j < $no_of_points; $j++) {
$wkt .= (isset($data_row[$i][$j]['x'])
&& trim((string) $data_row[$i][$j]['x']) != ''
? $data_row[$i][$j]['x'] : $empty)
. ' ' . (isset($data_row[$i][$j]['y'])
&& trim((string) $data_row[$i][$j]['y']) != ''
? $data_row[$i][$j]['y'] : $empty) . ',';
}
$wkt = mb_substr($wkt, 0, -1);
$wkt .= '),';
}
$wkt = mb_substr($wkt, 0, -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
*/
public function getShape(array $row_data)
{
$wkt = 'MULTILINESTRING(';
for ($i = 0; $i < $row_data['numparts']; $i++) {
$wkt .= '(';
foreach ($row_data['parts'][$i]['points'] as $point) {
$wkt .= $point['x'] . ' ' . $point['y'] . ',';
}
$wkt = mb_substr($wkt, 0, -1);
$wkt .= '),';
}
$wkt = mb_substr($wkt, 0, -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 $index Index of the geometry
*
* @return array params for the GIS data editor from the value of the GIS column
*/
public function generateParams($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'] = 'MULTILINESTRING';
$wkt = $value;
}
// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
$multilinestirng = mb_substr($wkt, 17, -2);
// Separate each linestring
$linestirngs = explode('),(', $multilinestirng);
$params[$index]['MULTILINESTRING']['no_of_lines'] = count($linestirngs);
$j = 0;
foreach ($linestirngs as $linestring) {
$points_arr = $this->extractPoints($linestring, null);
$no_of_points = count($points_arr);
$params[$index]['MULTILINESTRING'][$j]['no_of_points'] = $no_of_points;
for ($i = 0; $i < $no_of_points; $i++) {
$params[$index]['MULTILINESTRING'][$j][$i]['x'] = $points_arr[$i][0];
$params[$index]['MULTILINESTRING'][$j][$i]['y'] = $points_arr[$i][1];
}
$j++;
}
return $params;
}
}