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322 lines
9.9 KiB
322 lines
9.9 KiB
2 years ago
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<?php
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/**
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* Handles actions related to GIS LINESTRING 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 count;
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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 LINESTRING objects
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*/
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class GisLineString extends GisGeometry
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{
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/** @var self */
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private static $instance;
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/**
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* A private constructor; prevents direct creation of object.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return GisLineString the singleton
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*/
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public static function singleton()
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{
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if (! isset(self::$instance)) {
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self::$instance = new GisLineString();
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}
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return self::$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 'LINESTRING(' and trailing ')'
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$linestring = mb_substr($spatial, 11, -1);
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return $this->setMinMax($linestring, []);
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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 $line_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 $label,
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$line_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($line_color, 1, 2));
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$green = (int) hexdec(mb_substr($line_color, 3, 2));
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$blue = (int) hexdec(mb_substr($line_color, 4, 2));
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$color = $image->colorAllocate($red, $green, $blue);
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$label = trim($label ?? '');
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// Trim to remove leading 'LINESTRING(' and trailing ')'
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$lineString = mb_substr($spatial, 11, -1);
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$points_arr = $this->extractPoints($lineString, $scale_data);
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foreach ($points_arr as $point) {
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if (isset($temp_point)) {
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// draw line section
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$image->line(
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(int) round($temp_point[0]),
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(int) round($temp_point[1]),
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(int) round($point[0]),
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(int) round($point[1]),
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$color
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);
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}
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$temp_point = $point;
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}
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// print label if applicable
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if ($label !== '') {
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$image->string(
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1,
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(int) round($points_arr[1][0]),
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(int) round($points_arr[1][1]),
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$label,
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$black
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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 LINESTRING object
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* @param string|null $label Label for the GIS LINESTRING object
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* @param string $line_color Color for the GIS LINESTRING object
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* @param array $scale_data Array containing data related to scaling
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* @param TCPDF $pdf TCPDF instance
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*
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* @return TCPDF the modified TCPDF instance
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*/
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public function prepareRowAsPdf($spatial, ?string $label, $line_color, array $scale_data, $pdf)
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{
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// allocate colors
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$red = hexdec(mb_substr($line_color, 1, 2));
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$green = hexdec(mb_substr($line_color, 3, 2));
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$blue = hexdec(mb_substr($line_color, 4, 2));
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$line = [
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'width' => 1.5,
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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($label ?? '');
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// Trim to remove leading 'LINESTRING(' and trailing ')'
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$linesrting = mb_substr($spatial, 11, -1);
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$points_arr = $this->extractPoints($linesrting, $scale_data);
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foreach ($points_arr as $point) {
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if (isset($temp_point)) {
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// draw line section
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$pdf->Line($temp_point[0], $temp_point[1], $point[0], $point[1], $line);
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}
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$temp_point = $point;
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}
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// print label
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if ($label !== '') {
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$pdf->SetXY($points_arr[1][0], $points_arr[1][1]);
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$pdf->SetFontSize(5);
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$pdf->Cell(0, 0, $label);
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}
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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 LINESTRING object
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* @param string $label Label for the GIS LINESTRING object
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* @param string $line_color Color for the GIS LINESTRING 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, $line_color, array $scale_data)
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{
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$line_options = [
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'name' => $label,
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'id' => $label . $this->getRandomId(),
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'class' => 'linestring vector',
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'fill' => 'none',
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'stroke' => $line_color,
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'stroke-width' => 2,
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];
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// Trim to remove leading 'LINESTRING(' and trailing ')'
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$linesrting = mb_substr($spatial, 11, -1);
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$points_arr = $this->extractPoints($linesrting, $scale_data);
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$row = '<polyline points="';
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foreach ($points_arr as $point) {
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$row .= $point[0] . ',' . $point[1] . ' ';
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}
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$row .= '"';
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foreach ($line_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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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 LINESTRING object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS LINESTRING object
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* @param array $line_color Color for the GIS LINESTRING object
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* @param array $scale_data Array containing data related to scaling
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*
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* @return string JavaScript related to a row in the GIS dataset
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*/
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public function prepareRowAsOl($spatial, int $srid, $label, $line_color, array $scale_data)
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{
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$stroke_style = [
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'color' => $line_color,
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'width' => 2,
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];
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$result = 'var style = new ol.style.Style({'
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. 'stroke: new ol.style.Stroke(' . json_encode($stroke_style) . ')';
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if (trim($label) !== '') {
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$text_style = ['text' => trim($label)];
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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, $scale_data);
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// Trim to remove leading 'LINESTRING(' and trailing ')'
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$linesrting = mb_substr($spatial, 11, -1);
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$points_arr = $this->extractPoints($linesrting, null);
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return $result . 'var line = new ol.Feature({geometry: '
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. $this->getLineForOpenLayers($points_arr, $srid) . '});'
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. 'line.setStyle(style);'
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. 'vectorLayer.addFeature(line);';
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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 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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public function generateWkt(array $gis_data, $index, $empty = '')
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{
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$no_of_points = $gis_data[$index]['LINESTRING']['no_of_points'] ?? 2;
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if ($no_of_points < 2) {
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$no_of_points = 2;
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}
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$wkt = 'LINESTRING(';
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for ($i = 0; $i < $no_of_points; $i++) {
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$wkt .= (isset($gis_data[$index]['LINESTRING'][$i]['x'])
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&& trim((string) $gis_data[$index]['LINESTRING'][$i]['x']) != ''
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? $gis_data[$index]['LINESTRING'][$i]['x'] : $empty)
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. ' ' . (isset($gis_data[$index]['LINESTRING'][$i]['y'])
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&& trim((string) $gis_data[$index]['LINESTRING'][$i]['y']) != ''
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? $gis_data[$index]['LINESTRING'][$i]['y'] : $empty) . ',';
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}
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$wkt = mb_substr($wkt, 0, -1);
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return $wkt . ')';
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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[$index]['gis_type'] = 'LINESTRING';
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$wkt = $value;
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}
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// Trim to remove leading 'LINESTRING(' and trailing ')'
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$linestring = mb_substr($wkt, 11, -1);
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$points_arr = $this->extractPoints($linestring, null);
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$no_of_points = count($points_arr);
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$params[$index]['LINESTRING']['no_of_points'] = $no_of_points;
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for ($i = 0; $i < $no_of_points; $i++) {
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$params[$index]['LINESTRING'][$i]['x'] = $points_arr[$i][0];
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$params[$index]['LINESTRING'][$i]['y'] = $points_arr[$i][1];
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}
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return $params;
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}
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}
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