357 lines
11 KiB
PHP
357 lines
11 KiB
PHP
<?php
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/**
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* Handles actions related to GIS MULTILINESTRING 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\Gis\Ds\ScaleData;
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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 explode;
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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 sprintf;
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use function trim;
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/**
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* Handles actions related to GIS MULTILINESTRING objects
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*/
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class GisMultiLineString extends GisGeometry
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{
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private static self $instance;
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/**
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* A private constructor; prevents direct creation of object.
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*/
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private function __construct()
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{
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}
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/**
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* Returns the singleton.
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*
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* @return GisMultiLineString the singleton
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*/
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public static function singleton(): GisMultiLineString
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{
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if (! isset(self::$instance)) {
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self::$instance = new GisMultiLineString();
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}
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return self::$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 ScaleData|null the min, max values for x and y coordinates
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*/
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public function scaleRow(string $spatial): ScaleData|null
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{
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$minMax = null;
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilineString = mb_substr($spatial, 17, -2);
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// Separate each linestring
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$linestrings = explode('),(', $multilineString);
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foreach ($linestrings as $linestring) {
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$minMax = $this->setMinMax($linestring, $minMax);
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}
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return $minMax;
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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 $label Label for the GIS POLYGON object
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* @param int[] $color Color for the GIS POLYGON object
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* @param mixed[] $scaleData Array containing data related to scaling
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*/
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public function prepareRowAsPng(
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string $spatial,
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string $label,
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array $color,
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array $scaleData,
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ImageWrapper $image,
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): ImageWrapper {
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// allocate colors
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$black = $image->colorAllocate(0, 0, 0);
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$lineColor = $image->colorAllocate(...$color);
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilineString = mb_substr($spatial, 17, -2);
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// Separate each linestring
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$linestrings = explode('),(', $multilineString);
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$firstLine = true;
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foreach ($linestrings as $linestring) {
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$pointsArr = $this->extractPoints1d($linestring, $scaleData);
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foreach ($pointsArr as $point) {
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if (isset($tempPoint)) {
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// draw line section
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$image->line(
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(int) round($tempPoint[0]),
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(int) round($tempPoint[1]),
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(int) round($point[0]),
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(int) round($point[1]),
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$lineColor,
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);
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}
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$tempPoint = $point;
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}
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unset($tempPoint);
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// print label if applicable
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if ($label !== '' && $firstLine) {
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$image->string(
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1,
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(int) round($pointsArr[1][0]),
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(int) round($pointsArr[1][1]),
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$label,
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$black,
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);
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}
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$firstLine = false;
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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 MULTILINESTRING object
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param int[] $color Color for the GIS MULTILINESTRING object
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* @param mixed[] $scaleData Array containing data related to scaling
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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(string $spatial, string $label, array $color, array $scaleData, TCPDF $pdf): TCPDF
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{
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$line = ['width' => 1.5, 'color' => $color];
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilineString = mb_substr($spatial, 17, -2);
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// Separate each linestring
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$linestrings = explode('),(', $multilineString);
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$firstLine = true;
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foreach ($linestrings as $linestring) {
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$pointsArr = $this->extractPoints1d($linestring, $scaleData);
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foreach ($pointsArr as $point) {
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if (isset($tempPoint)) {
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// draw line section
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$pdf->Line($tempPoint[0], $tempPoint[1], $point[0], $point[1], $line);
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}
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$tempPoint = $point;
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}
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unset($tempPoint);
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// print label
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if ($label !== '' && $firstLine) {
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$pdf->setXY($pointsArr[1][0], $pointsArr[1][1]);
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$pdf->setFontSize(5);
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$pdf->Cell(0, 0, $label);
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}
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$firstLine = false;
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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 MULTILINESTRING object
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param int[] $color Color for the GIS MULTILINESTRING object
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* @param mixed[] $scaleData 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(string $spatial, string $label, array $color, array $scaleData): string
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{
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$lineOptions = [
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'name' => $label,
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'class' => 'linestring vector',
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'fill' => 'none',
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'stroke' => sprintf('#%02x%02x%02x', ...$color),
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'stroke-width' => 2,
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];
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$multilineString = mb_substr($spatial, 17, -2);
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// Separate each linestring
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$linestrings = explode('),(', $multilineString);
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$row = '';
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foreach ($linestrings as $linestring) {
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$pointsArr = $this->extractPoints1d($linestring, $scaleData);
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$row .= '<polyline points="';
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foreach ($pointsArr as $point) {
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$row .= $point[0] . ',' . $point[1] . ' ';
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}
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$row .= '"';
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$lineOptions['id'] = $label . $this->getRandomId();
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foreach ($lineOptions as $option => $val) {
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$row .= ' ' . $option . '="' . $val . '"';
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}
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$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 MULTILINESTRING object
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* @param int $srid Spatial reference ID
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* @param string $label Label for the GIS MULTILINESTRING object
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* @param int[] $color Color for the GIS MULTILINESTRING object
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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(string $spatial, int $srid, string $label, array $color): string
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{
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$strokeStyle = ['color' => $color, 'width' => 2];
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$style = 'new ol.style.Style({'
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. 'stroke: new ol.style.Stroke(' . json_encode($strokeStyle) . ')';
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if ($label !== '') {
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$textStyle = ['text' => $label];
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$style .= ', text: new ol.style.Text(' . json_encode($textStyle) . ')';
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}
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$style .= '})';
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$wktCoordinates = mb_substr($spatial, 17, -2);
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$olGeometry = $this->toOpenLayersObject(
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'ol.geom.MultiLineString',
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$this->extractPoints2d($wktCoordinates, null),
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$srid,
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);
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return $this->addGeometryToLayer($olGeometry, $style);
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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 mixed[] $gisData 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 $gisData, int $index, string|null $empty = ''): string
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{
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$dataRow = $gisData[$index]['MULTILINESTRING'];
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$noOfLines = $dataRow['no_of_lines'] ?? 1;
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if ($noOfLines < 1) {
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$noOfLines = 1;
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}
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$wkt = 'MULTILINESTRING(';
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/** @infection-ignore-all */
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for ($i = 0; $i < $noOfLines; $i++) {
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$noOfPoints = $dataRow[$i]['no_of_points'] ?? 2;
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if ($noOfPoints < 2) {
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$noOfPoints = 2;
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}
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$wkt .= '(';
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for ($j = 0; $j < $noOfPoints; $j++) {
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$wkt .= (isset($dataRow[$i][$j]['x'])
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&& trim((string) $dataRow[$i][$j]['x']) != ''
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? $dataRow[$i][$j]['x'] : $empty)
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. ' ' . (isset($dataRow[$i][$j]['y'])
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&& trim((string) $dataRow[$i][$j]['y']) != ''
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? $dataRow[$i][$j]['y'] : $empty) . ',';
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}
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$wkt = mb_substr($wkt, 0, -1);
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$wkt .= '),';
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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 the WKT for the data from ESRI shape files.
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*
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* @param mixed[] $rowData 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 $rowData): string
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{
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$wkt = 'MULTILINESTRING(';
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/** @infection-ignore-all */
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for ($i = 0; $i < $rowData['numparts']; $i++) {
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$wkt .= '(';
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foreach ($rowData['parts'][$i]['points'] as $point) {
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$wkt .= $point['x'] . ' ' . $point['y'] . ',';
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}
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$wkt = mb_substr($wkt, 0, -1);
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$wkt .= '),';
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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 coordinate parameters for the GIS data editor from the value of the GIS column.
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*
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* @param string $wkt Value of the GIS column
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*
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* @return mixed[] Coordinate params for the GIS data editor from the value of the GIS column
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*/
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protected function getCoordinateParams(string $wkt): array
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{
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// Trim to remove leading 'MULTILINESTRING((' and trailing '))'
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$wktMultilinestring = mb_substr($wkt, 17, -2);
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$wktLinestrings = explode('),(', $wktMultilinestring);
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$coords = ['no_of_lines' => count($wktLinestrings)];
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foreach ($wktLinestrings as $j => $wktLinestring) {
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$points = $this->extractPoints1d($wktLinestring, null);
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$noOfPoints = count($points);
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$coords[$j] = ['no_of_points' => $noOfPoints];
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/** @infection-ignore-all */
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for ($i = 0; $i < $noOfPoints; $i++) {
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$coords[$j][$i] = ['x' => $points[$i][0], 'y' => $points[$i][1]];
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}
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}
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return $coords;
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}
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}
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