GPX::linestringToGPX() - Code Metrics - Inspection of "reduce code complexity" - swen100/geoPHP - Measure and Improve Code Quality continuously with Scrutinizer

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Push — master ( 4317be...c734ca )

by Swen

created 2021-12-16 13:44 UTC

GPX::linestringToGPX() B

↳ Parent: GPX

Complexity

Conditions	10
Paths	10

Size

Total Lines	31
Code Lines	18

Duplication

Lines	0
Ratio	0 %

Importance

Changes	2
Bugs	0	Features	0

Metric	Value
eloc	18
c	2
b	0
f	0
dl	0
loc	31
rs	7.6666
cc	10
nc	10
nop	1

How to fix Complexity

<?php
namespace geoPHP\Adapter;

use geoPHP\Geometry\Collection;
use geoPHP\geoPHP;
use geoPHP\Geometry\Geometry;
use geoPHP\Geometry\GeometryCollection;
use geoPHP\Geometry\Point;
use geoPHP\Geometry\LineString;
use geoPHP\Geometry\MultiLineString;

/*
 * Copyright (c) Patrick Hayes
 *
 * This code is open-source and licenced under the Modified BSD License.
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

/**
 * PHP Geometry/GPX encoder/decoder
 */
class GPX implements GeoAdapter
{

    /**
     * @var string Name-space string. eg 'georss:'
     */
    private $nss = '';

    /**
     * @var GpxTypes
     */
    protected $gpxTypes;

    /**
     * @var \DOMXPath
     */
    protected $xpath;
    
    /**
     * @var bool
     */
    protected $parseGarminRpt = false;
    
    /**
     * @var Point[]
     */
    protected $trackFromRoute;
    
    /**
     * @var bool add elevation-data to every coordinate
     */
    public $withElevation = false;

    /**
     * Read GPX string into geometry object
     *
     * @param string $gpx A GPX string
     * @param array<array> $allowedElements Which elements can be read from each GPX type
     *              If not specified, every element defined in the GPX specification can be read
     *              Can be overwritten with an associative array, with type name in keys.
     *              eg.: ['wptType' => ['ele', 'name'], 'trkptType' => ['ele'], 'metadataType' => null]
     *
     * @return Geometry|GeometryCollection
     * @throws \Exception If GPX is not a valid XML
     */
    public function read(string $gpx, array $allowedElements = []): Geometry
    {
        // Converts XML tags to lower-case (DOMDocument functions are case sensitive)
        $gpx = preg_replace_callback("/(<\/?\w+)(.*?>)/", function ($m) {
            return strtolower($m[1]) . $m[2];
        }, $gpx);

        $this->gpxTypes = new GpxTypes($allowedElements);

        //libxml_use_internal_errors(true); // why?
        // Load into DOMDocument
        $xmlObject = new \DOMDocument('1.0', 'UTF-8');
        $xmlObject->preserveWhiteSpace = false;
        
        if ($xmlObject->loadXML($gpx) === false) {
            throw new \Exception("Invalid GPX: " . $gpx);
        }

        $this->parseGarminRpt = strpos($gpx, 'gpxx:rpt') > 0;

        // Initialize XPath parser if needed (currently only for Garmin extensions)
        if ($this->parseGarminRpt) {
            $this->xpath = new \DOMXPath($xmlObject);
            $this->xpath->registerNamespace('gpx', 'http://www.topografix.com/GPX/1/1');
            $this->xpath->registerNamespace('gpxx', 'http://www.garmin.com/xmlschemas/GpxExtensions/v3');
        }

        try {
            $geom = $this->geomFromXML($xmlObject);
        } catch (\Exception $e) {
            throw new \Exception("Cannot Read Geometry From GPX: " . $gpx . '<br>' . $e->getMessage());
        }

        return $geom;
    }

    /**
     * Parses the GPX XML and returns a geometry
     * @param \DOMDocument $xmlObject
     * @return GeometryCollection|Geometry Returns the geometry representation of the GPX (@see geoPHP::buildGeometry)
     */
    protected function geomFromXML($xmlObject): Geometry
    {
        /** @var Geometry[] $geometries */
        $geometries = array_merge(
            $this->parseWaypoints($xmlObject),
            $this->parseTracks($xmlObject),
            $this->parseRoutes($xmlObject)
        );

        if (isset($this->trackFromRoute)) {
            $trackFromRoute = new LineString($this->trackFromRoute);
            $trackFromRoute->setData('gpxType', 'track');
            $trackFromRoute->setData('type', 'planned route');
            $geometries[] = $trackFromRoute;
        }

        $geometry = geoPHP::buildGeometry($geometries);
        if (in_array('metadata', $this->gpxTypes->get('gpxType')) && $xmlObject->getElementsByTagName('metadata')->length === 1) {
            $metadata = $this->parseNodeProperties(
                $xmlObject->getElementsByTagName('metadata')->item(0),
                $this->gpxTypes->get('metadataType')
            );
            if ($geometry->getData() !== null && $metadata !== null) {
                $geometry = new GeometryCollection([$geometry]);
            }
            $geometry->setData($metadata);
        }
        
        return geoPHP::geometryReduce($geometry);
    }

    /**
     * @param \DOMNode $xml
     * @param string $nodeName
     * @return array<\DOMElement>
     */
    protected function childElements(\DOMNode $xml, string $nodeName = ''): array
    {
        $children = [];
        foreach ($xml->childNodes as $child) {
            if ($child->nodeName == $nodeName) {
                $children[] = $child;
            }
        }
        return $children;
    }

    /**
     * @param \DOMElement $node
     * @return Point
     */
    protected function parsePoint(\DOMElement $node): Point
    {
        $lat = null;
        $lon = null;
        
        if ($node->attributes !== null) {
            $lat = $node->attributes->getNamedItem("lat")->nodeValue;
            $lon = $node->attributes->getNamedItem("lon")->nodeValue;
        }
        
        $ele = $node->getElementsByTagName('ele');
        
        if ($this->withElevation && $ele->length) {
            $elevation = $ele->item(0)->nodeValue;
            $point = new Point($lon, $lat, $elevation <> 0 ? $elevation : null);
        } else {
            $point = new Point($lon, $lat);
        }
        $point->setData($this->parseNodeProperties($node, $this->gpxTypes->get($node->nodeName . 'Type')));
        if ($node->nodeName === 'rtept' && $this->parseGarminRpt) {
            $rpts = $this->xpath->query('.//gpx:extensions/gpxx:RoutePointExtension/gpxx:rpt', $node);
            if ($rpts !== false) {
                foreach ($rpts as $element) {
                    $this->trackFromRoute[] = $this->parsePoint($element);
                }
            }
        }
        return $point;
    }

    /**
     * @param \DOMDocument $xmlObject
     * @return Point[]
     */
    protected function parseWaypoints($xmlObject): array
    {
        if (!in_array('wpt', $this->gpxTypes->get('gpxType'))) {
            return [];
        }
        $points = [];
        $wptElements = $xmlObject->getElementsByTagName('wpt');
        foreach ($wptElements as $wpt) {
            $point = $this->parsePoint($wpt);
            $point->setData('gpxType', 'waypoint');
            $points[] = $point;
        }
        return $points;
    }

    /**
     * @param \DOMDocument $xmlObject
     * @return LineString[]|MultiLineString[]
     */
    protected function parseTracks($xmlObject): array
    {
        if (!in_array('trk', $this->gpxTypes->get('gpxType'))) {
            return [];
        }
        $tracks = [];
        $trkElements = $xmlObject->getElementsByTagName('trk');
        foreach ($trkElements as $trk) {
            $segments = [];
            /** @noinspection SpellCheckingInspection */
            foreach ($this->childElements($trk, 'trkseg') as $trkseg) {
                $points = [];
                /** @noinspection SpellCheckingInspection */
                foreach ($this->childElements($trkseg, 'trkpt') as $trkpt) {
                    $points[] = $this->parsePoint($trkpt);
                }
                // Avoids creating invalid LineString
                if (count($points) > 1) {
                    $segments[] = new LineString($points);
                }
            }
            if (!empty($segments)) {
                $track = count($segments) === 1 ? $segments[0] : new MultiLineString($segments);
                $track->setData($this->parseNodeProperties($trk, $this->gpxTypes->get('trkType')));
                $track->setData('gpxType', 'track');
                $tracks[] = $track;
            }
        }

        return $tracks;
    }

    /**
     * @param \DOMDocument $xmlObject
     * @return LineString[]
     */
    protected function parseRoutes($xmlObject): array
    {
        if (!in_array('rte', $this->gpxTypes->get('gpxType'))) {
            return [];
        }
        $lines = [];
        $rteElements = $xmlObject->getElementsByTagName('rte');
        foreach ($rteElements as $rte) {
            $points = [];
            /** @noinspection SpellCheckingInspection */
            foreach ($this->childElements($rte, 'rtept') as $routePoint) {
                /** @noinspection SpellCheckingInspection */
                $points[] = $this->parsePoint($routePoint);
            }
            $line = new LineString($points);
            $line->setData($this->parseNodeProperties($rte, $this->gpxTypes->get('rteType')));
            $line->setData('gpxType', 'route');
            $lines[] = $line;
        }
        return $lines;
    }

    /**
     * Parses a DOMNode and returns its content in a multidimensional associative array
     * eg: <wpt><name>Test</name><link href="example.com"><text>Example</text></link></wpt>
     * to: ['name' => 'Test', 'link' => ['text'] => 'Example', '@attributes' => ['href' => 'example.com']]
     *
     * @param \DOMNode $node
     * @param string[]|null $tagList
     * @return array<string>|string
     */
    protected function parseNodeProperties(\DOMNode $node, $tagList = null)
    {
        if ($node->nodeType === XML_TEXT_NODE) {
            return $node->nodeValue;
        }
        
        $result = [];
        
        // add/parse properties from childs to result
        if ($node->hasChildNodes()) {
            $this->addChildNodeProperties($result, $node, $tagList);
        }
        
        // add attributes to result
        if ($node->hasAttributes()) {
            $this->addNodeAttributes($result, $node);
        }
        
        return $result;
    }
    
    /**
     *
     * @param array<string, mixed>|string $result
     * @param \DOMNode $node
     * @param string[]|null $tagList
     * @return void
     */
    private function addChildNodeProperties(&$result, \DOMNode $node, $tagList)
    {
        foreach ($node->childNodes as $childNode) {
            /** @var \DOMNode $childNode */
            if ($childNode->hasChildNodes()) {
                if ($tagList === null || in_array($childNode->nodeName, $tagList ?: [])) {
                    if ($node->firstChild->nodeName == $node->lastChild->nodeName && $node->childNodes->length > 1) {
                        $result[$childNode->nodeName][] = $this->parseNodeProperties($childNode);
                    } else {
                        $result[$childNode->nodeName] = $this->parseNodeProperties($childNode);
                    }
                }
            } elseif ($childNode->nodeType === 1 && in_array($childNode->nodeName, $tagList ?: [])) {
                // node is a DOMElement
                $result[$childNode->nodeName] = $this->parseNodeProperties($childNode);
            } elseif ($childNode->nodeType === 3) {
                // node is a DOMText
                $result = $childNode->nodeValue;
            }
        }
    }
    
    /**
     *
     * @param array<string, mixed>|string $result
     * @param \DOMNode $node
     * @return void
     */
    private function addNodeAttributes(&$result, \DOMNode $node)
    {
        if (is_string($result)) {
            // As of the GPX specification text node cannot have attributes, thus this never happens
            $result = ['#text' => $result];
        }
        $attributes = [];
        foreach ($node->attributes as $attribute) {
            if ($attribute->name !== 'lat' && $attribute->name !== 'lon' && trim($attribute->value) !== '') {
                $attributes[$attribute->name] = trim($attribute->value);
            }
        }
        if (!empty($attributes)) {
            $result['@attributes'] = $attributes;
        }
    }

    /**
     * Serialize geometries into a GPX string.
     *
     * @param Geometry|GeometryCollection $geometry
     * @param string $namespace
     * @param array<array> $allowedElements Which elements can be added to each GPX type
     *              If not specified, every element defined in the GPX specification can be added
     *              Can be overwritten with an associative array, with type name in keys.
     *              eg.: ['wptType' => ['ele', 'name'], 'trkptType' => ['ele'], 'metadataType' => null]
     * @return string The GPX string representation of the input geometries
     */
    public function write(Geometry $geometry, string $namespace = '', array $allowedElements = []): string
    {
        $namespace = trim($namespace);
        if (!empty($namespace)) {
            $this->nss = $namespace . ':';
        }
        $this->gpxTypes = new GpxTypes($allowedElements);

        return
            '<?xml version="1.0" encoding="UTF-8"?>
<' . $this->nss . 'gpx creator="geoPHP" version="1.1"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns="http://www.topografix.com/GPX/1/1"
  xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" >

' . $this->geometryToGPX($geometry) .
            '</' . $this->nss . 'gpx>
';
    }

    /**
     * @param Geometry|Collection $geometry
     * @return string
     */
    protected function geometryToGPX($geometry): string
    {
        switch ($geometry->geometryType()) {
            case Geometry::POINT:
                /** @var Point $geometry */
                return $this->pointToGPX($geometry);
            case Geometry::LINESTRING:
            case Geometry::MULTI_LINESTRING:
                /** @var LineString $geometry */
                return $this->linestringToGPX($geometry);
            case Geometry::POLYGON:
            case Geometry::MULTI_POINT:
            case Geometry::MULTI_POLYGON:
            case Geometry::GEOMETRY_COLLECTION:
                /** @var GeometryCollection $geometry */
                return $this->collectionToGPX($geometry);
        }
        return '';
    }

    /**
     * @param Point $geom
     * @param string $tag Can be "wpt", "trkpt" or "rtept"
     * @return string
     */
    private function pointToGPX($geom, $tag = 'wpt'): string
    {
        if ($geom->isEmpty() || ($tag === 'wpt' && !in_array($tag, $this->gpxTypes->get('gpxType')))) {
            return '';
        }
        $indent = $tag === 'trkpt' ? "\t\t" : ($tag === 'rtept' ? "\t" : '');

        if ($geom->hasZ() || $geom->getData() !== null) {
            $node = $indent . "<" . $this->nss . $tag . " lat=\"" . $geom->getY() . "\" lon=\"" . $geom->getX() . "\">\n";
            if ($geom->hasZ()) {
                $geom->setData('ele', $geom->getZ());
            }
            $node .= self::processGeometryData($geom, $this->gpxTypes->get($tag . 'Type'), $indent . "\t") .
                $indent . "</" . $this->nss . $tag . ">\n";
            if ($geom->hasZ()) {
                $geom->setData('ele', null);
            }
            return $node;
        }
        return $indent . "<" . $this->nss . $tag . " lat=\"" . $geom->getY() . "\" lon=\"" . $geom->getX() . "\" />\n";
    }

    /**
     * Writes a LineString or MultiLineString to the GPX
     *
     * The (Multi)LineString will be included in a <trk></trk> block
     * The LineString or each LineString of the MultiLineString will be in <trkseg> </trkseg> inside the <trk>
     *
     * @param LineString|MultiLineString $geom
     * @return string
     */
    private function linestringToGPX($geom): string
    {
        $isTrack = $geom->getData('gpxType') === 'route' ? false : true;
        if ($geom->isEmpty() || !in_array($isTrack ? 'trk' : 'rte', $this->gpxTypes->get('gpxType'))) {
            return '';
        }

        if ($isTrack) { // write as <trk>
            /** @noinspection SpellCheckingInspection */
            $gpx = "<" . $this->nss . "trk>\n" . self::processGeometryData($geom, $this->gpxTypes->get('trkType'));
            $components = $geom->geometryType() === 'LineString' ? [$geom] : $geom->getComponents();
            foreach ($components as $lineString) {
                $gpx .= "\t<" . $this->nss . "trkseg>\n";
                foreach ($lineString->getPoints() as $point) {
                    $gpx .= $this->pointToGPX($point, 'trkpt');
                }
                $gpx .= "\t</" . $this->nss . "trkseg>\n";
            }
            /** @noinspection SpellCheckingInspection */
            $gpx .= "</" . $this->nss . "trk>\n";
        } else { // write as <rte>
            /** @noinspection SpellCheckingInspection */
            $gpx = "<" . $this->nss . "rte>\n" . self::processGeometryData($geom, $this->gpxTypes->get('rteType'));
            foreach ($geom->getPoints() as $point) {
                $gpx .= $this->pointToGPX($point, 'rtept');
            }
            /** @noinspection SpellCheckingInspection */
            $gpx .= "</" . $this->nss . "rte>\n";
        }

        return $gpx;
    }

    /**
     * @param Collection $geometry
     * @return string
     */
    public function collectionToGPX($geometry): string
    {
        $metadata = self::processGeometryData($geometry, $this->gpxTypes->get('metadataType'));
        $metadata = empty($metadata) || !in_array('metadataType', $this->gpxTypes->get('gpxType')) ?
            '' : "<metadata>\n" . $metadata . "</metadata>\n\n";
        $wayPoints = $routes = $tracks = "";

        foreach ($geometry->getComponents() as $component) {
            $geometryType = $component->geometryType();
            
            if (strpos($geometryType, 'Point') !== false) {
                $wayPoints .= $this->geometryToGPX($component);
            } elseif (strpos($geometryType, 'Linestring') !== false) {
                if ($component->getData('gpxType') === 'route') {
                    $routes .= $this->geometryToGPX($component);
                } else {
                    $tracks .= $this->geometryToGPX($component);
                }
            } else {
                return $this->geometryToGPX($component);
            }
        }

        return $metadata . $wayPoints . $routes . $tracks;
    }

    /**
     * @param Geometry $geometry
     * @param string[] $tagList Allowed tags
     * @param string $indent
     * @return string
     */
    protected static function processGeometryData($geometry, $tagList, $indent = "\t"): string
    {
        $tags = '';
        if ($geometry->getData() !== null) {
            foreach ($tagList as $tagName) {
                if ($geometry->hasDataProperty($tagName)) {
                    $tags .= self::createNodes($tagName, $geometry->getData($tagName), $indent) . "\n";
                }
            }
        }
        return $tags;
    }

    /**
     * @param string $tagName
     * @param string|array<array> $value
     * @param string $indent
     * @return string
     */
    protected static function createNodes($tagName, $value, $indent): string
    {
        $attributes = '';
        if (!is_array($value)) {
            $returnValue = $value;
        } else {
            $returnValue = '';
            if (array_key_exists('@attributes', $value)) {
                $attributes = '';
                foreach ($value['@attributes'] as $attributeName => $attributeValue) {
                    $attributes .= ' ' . $attributeName . '="' . $attributeValue . '"';
                }
                unset($value['@attributes']);
            }
            foreach ($value as $subKey => $subValue) {
                $returnValue .= "\n" . self::createNodes($subKey, $subValue, $indent . "\t") . "\n" . $indent;
            }
        }
        return $indent . "<{$tagName}{$attributes}>{$returnValue}</{$tagName}>";
    }
}


1			<?php
2			namespace geoPHP\Adapter;
3
4			use geoPHP\Geometry\Collection;
5			use geoPHP\geoPHP;
6			use geoPHP\Geometry\Geometry;
7			use geoPHP\Geometry\GeometryCollection;
8			use geoPHP\Geometry\Point;
9			use geoPHP\Geometry\LineString;
10			use geoPHP\Geometry\MultiLineString;
11
12			/*
13			* Copyright (c) Patrick Hayes
14			*
15			* This code is open-source and licenced under the Modified BSD License.
16			* For the full copyright and license information, please view the LICENSE
17			* file that was distributed with this source code.
18			*/
19
20			/**
21			* PHP Geometry/GPX encoder/decoder
22			*/
23			class GPX implements GeoAdapter
24			{
25
26			/**
27			* @var string Name-space string. eg 'georss:'
28			*/
29			private $nss = '';
30
31			/**
32			* @var GpxTypes
33			*/
34			protected $gpxTypes;
35
36			/**
37			* @var \DOMXPath
38			*/
39			protected $xpath;
40
41			/**
42			* @var bool
43			*/
44			protected $parseGarminRpt = false;
45
46			/**
47			* @var Point[]
48			*/
49			protected $trackFromRoute;
50
51			/**
52			* @var bool add elevation-data to every coordinate
53			*/
54			public $withElevation = false;
55
56			/**
57			* Read GPX string into geometry object
58			*
59			* @param string $gpx A GPX string
60			* @param array<array> $allowedElements Which elements can be read from each GPX type
61			* If not specified, every element defined in the GPX specification can be read
62			* Can be overwritten with an associative array, with type name in keys.
63			* eg.: ['wptType' => ['ele', 'name'], 'trkptType' => ['ele'], 'metadataType' => null]
64			*
65			* @return Geometry\|GeometryCollection
66			* @throws \Exception If GPX is not a valid XML
67			*/
68			public function read(string $gpx, array $allowedElements = []): Geometry
69			{
70			// Converts XML tags to lower-case (DOMDocument functions are case sensitive)
71			$gpx = preg_replace_callback("/(<\/?\w+)(.*?>)/", function ($m) {
72			return strtolower($m[1]) . $m[2];
73			}, $gpx);
74
75			$this->gpxTypes = new GpxTypes($allowedElements);
76
77			//libxml_use_internal_errors(true); // why?
78			// Load into DOMDocument
79			$xmlObject = new \DOMDocument('1.0', 'UTF-8');
80			$xmlObject->preserveWhiteSpace = false;
81
82			if ($xmlObject->loadXML($gpx) === false) {
83			throw new \Exception("Invalid GPX: " . $gpx);
84			}
85
86			$this->parseGarminRpt = strpos($gpx, 'gpxx:rpt') > 0;
87
88			// Initialize XPath parser if needed (currently only for Garmin extensions)
89			if ($this->parseGarminRpt) {
90			$this->xpath = new \DOMXPath($xmlObject);
91			$this->xpath->registerNamespace('gpx', 'http://www.topografix.com/GPX/1/1');
92			$this->xpath->registerNamespace('gpxx', 'http://www.garmin.com/xmlschemas/GpxExtensions/v3');
93			}
94
95			try {
96			$geom = $this->geomFromXML($xmlObject);
97			} catch (\Exception $e) {
98			throw new \Exception("Cannot Read Geometry From GPX: " . $gpx . '<br>' . $e->getMessage());
99			}
100
101			return $geom;
102			}
103
104			/**
105			* Parses the GPX XML and returns a geometry
106			* @param \DOMDocument $xmlObject
107			* @return GeometryCollection\|Geometry Returns the geometry representation of the GPX (@see geoPHP::buildGeometry)
108			*/
109			protected function geomFromXML($xmlObject): Geometry
110			{
111			/** @var Geometry[] $geometries */
112			$geometries = array_merge(
113			$this->parseWaypoints($xmlObject),
114			$this->parseTracks($xmlObject),
115			$this->parseRoutes($xmlObject)
116			);
117
118			if (isset($this->trackFromRoute)) {
119			$trackFromRoute = new LineString($this->trackFromRoute);
120			$trackFromRoute->setData('gpxType', 'track');
121			$trackFromRoute->setData('type', 'planned route');
122			$geometries[] = $trackFromRoute;
123			}
124
125			$geometry = geoPHP::buildGeometry($geometries);
126			if (in_array('metadata', $this->gpxTypes->get('gpxType')) && $xmlObject->getElementsByTagName('metadata')->length === 1) {
127			$metadata = $this->parseNodeProperties(
128			$xmlObject->getElementsByTagName('metadata')->item(0),
129			$this->gpxTypes->get('metadataType')
130			);
131			if ($geometry->getData() !== null && $metadata !== null) {
132			$geometry = new GeometryCollection([$geometry]);
133			}
134			$geometry->setData($metadata);
135			}
136
137			return geoPHP::geometryReduce($geometry);
138			}
139
140			/**
141			* @param \DOMNode $xml
142			* @param string $nodeName
143			* @return array<\DOMElement>
144			*/
145			protected function childElements(\DOMNode $xml, string $nodeName = ''): array
146			{
147			$children = [];
148			foreach ($xml->childNodes as $child) {
149			if ($child->nodeName == $nodeName) {
150			$children[] = $child;
151			}
152			}
153			return $children;
154			}
155
156			/**
157			* @param \DOMElement $node
158			* @return Point
159			*/
160			protected function parsePoint(\DOMElement $node): Point
161			{
162			$lat = null;
163			$lon = null;
164
165			if ($node->attributes !== null) {
166			$lat = $node->attributes->getNamedItem("lat")->nodeValue;
167			$lon = $node->attributes->getNamedItem("lon")->nodeValue;
168			}
169
170			$ele = $node->getElementsByTagName('ele');
171
172			if ($this->withElevation && $ele->length) {
173			$elevation = $ele->item(0)->nodeValue;
174			$point = new Point($lon, $lat, $elevation <> 0 ? $elevation : null);
175			} else {
176			$point = new Point($lon, $lat);
177			}
178			$point->setData($this->parseNodeProperties($node, $this->gpxTypes->get($node->nodeName . 'Type')));
179			if ($node->nodeName === 'rtept' && $this->parseGarminRpt) {
180			$rpts = $this->xpath->query('.//gpx:extensions/gpxx:RoutePointExtension/gpxx:rpt', $node);
181			if ($rpts !== false) {
182			foreach ($rpts as $element) {
183			$this->trackFromRoute[] = $this->parsePoint($element);
184			}
185			}
186			}
187			return $point;
188			}
189
190			/**
191			* @param \DOMDocument $xmlObject
192			* @return Point[]
193			*/
194			protected function parseWaypoints($xmlObject): array
195			{
196			if (!in_array('wpt', $this->gpxTypes->get('gpxType'))) {
197			return [];
198			}
199			$points = [];
200			$wptElements = $xmlObject->getElementsByTagName('wpt');
201			foreach ($wptElements as $wpt) {
202			$point = $this->parsePoint($wpt);
203			$point->setData('gpxType', 'waypoint');
204			$points[] = $point;
205			}
206			return $points;
207			}
208
209			/**
210			* @param \DOMDocument $xmlObject
211			* @return LineString[]\|MultiLineString[]
212			*/
213			protected function parseTracks($xmlObject): array
214			{
215			if (!in_array('trk', $this->gpxTypes->get('gpxType'))) {
216			return [];
217			}
218			$tracks = [];
219			$trkElements = $xmlObject->getElementsByTagName('trk');
220			foreach ($trkElements as $trk) {
221			$segments = [];
222			/** @noinspection SpellCheckingInspection */
223			foreach ($this->childElements($trk, 'trkseg') as $trkseg) {
224			$points = [];
225			/** @noinspection SpellCheckingInspection */
226			foreach ($this->childElements($trkseg, 'trkpt') as $trkpt) {
227			$points[] = $this->parsePoint($trkpt);
228			}
229			// Avoids creating invalid LineString
230			if (count($points) > 1) {
231			$segments[] = new LineString($points);
232			}
233			}
234			if (!empty($segments)) {
235			$track = count($segments) === 1 ? $segments[0] : new MultiLineString($segments);
236			$track->setData($this->parseNodeProperties($trk, $this->gpxTypes->get('trkType')));
237			$track->setData('gpxType', 'track');
238			$tracks[] = $track;
239			}
240			}
241
242			return $tracks;
243			}
244
245			/**
246			* @param \DOMDocument $xmlObject
247			* @return LineString[]
248			*/
249			protected function parseRoutes($xmlObject): array
250			{
251			if (!in_array('rte', $this->gpxTypes->get('gpxType'))) {
252			return [];
253			}
254			$lines = [];
255			$rteElements = $xmlObject->getElementsByTagName('rte');
256			foreach ($rteElements as $rte) {
257			$points = [];
258			/** @noinspection SpellCheckingInspection */
259			foreach ($this->childElements($rte, 'rtept') as $routePoint) {
260			/** @noinspection SpellCheckingInspection */
261			$points[] = $this->parsePoint($routePoint);
262			}
263			$line = new LineString($points);
264			$line->setData($this->parseNodeProperties($rte, $this->gpxTypes->get('rteType')));
265			$line->setData('gpxType', 'route');
266			$lines[] = $line;
267			}
268			return $lines;
269			}
270
271			/**
272			* Parses a DOMNode and returns its content in a multidimensional associative array
273			* eg: <wpt><name>Test</name><link href="example.com"><text>Example</text></link></wpt>
274			* to: ['name' => 'Test', 'link' => ['text'] => 'Example', '@attributes' => ['href' => 'example.com']]
275			*
276			* @param \DOMNode $node
277			* @param string[]\|null $tagList
278			* @return array<string>\|string
279			*/
280			protected function parseNodeProperties(\DOMNode $node, $tagList = null)
281			{
282			if ($node->nodeType === XML_TEXT_NODE) {
283			return $node->nodeValue;
284			}
285
286			$result = [];
287
288			// add/parse properties from childs to result
289			if ($node->hasChildNodes()) {
290			$this->addChildNodeProperties($result, $node, $tagList);
291			}
292
293			// add attributes to result
294			if ($node->hasAttributes()) {
295			$this->addNodeAttributes($result, $node);
296			}
297
298			return $result;
299			}
300
301			/**
302			*
303			* @param array<string, mixed>\|string $result
304			* @param \DOMNode $node
305			* @param string[]\|null $tagList
306			* @return void
307			*/
308			private function addChildNodeProperties(&$result, \DOMNode $node, $tagList)
309			{
310			foreach ($node->childNodes as $childNode) {
311			/** @var \DOMNode $childNode */
312			if ($childNode->hasChildNodes()) {
313			if ($tagList === null \|\| in_array($childNode->nodeName, $tagList ?: [])) {
314			if ($node->firstChild->nodeName == $node->lastChild->nodeName && $node->childNodes->length > 1) {
315			$result[$childNode->nodeName][] = $this->parseNodeProperties($childNode);
316			} else {
317			$result[$childNode->nodeName] = $this->parseNodeProperties($childNode);
318			}
319			}
320			} elseif ($childNode->nodeType === 1 && in_array($childNode->nodeName, $tagList ?: [])) {
321			// node is a DOMElement
322			$result[$childNode->nodeName] = $this->parseNodeProperties($childNode);
323			} elseif ($childNode->nodeType === 3) {
324			// node is a DOMText
325			$result = $childNode->nodeValue;
326			}
327			}
328			}
329
330			/**
331			*
332			* @param array<string, mixed>\|string $result
333			* @param \DOMNode $node
334			* @return void
335			*/
336			private function addNodeAttributes(&$result, \DOMNode $node)
337			{
338			if (is_string($result)) {
339			// As of the GPX specification text node cannot have attributes, thus this never happens
340			$result = ['#text' => $result];
341			}
342			$attributes = [];
343			foreach ($node->attributes as $attribute) {
344			if ($attribute->name !== 'lat' && $attribute->name !== 'lon' && trim($attribute->value) !== '') {
345			$attributes[$attribute->name] = trim($attribute->value);
346			}
347			}
348			if (!empty($attributes)) {
349			$result['@attributes'] = $attributes;
350			}
351			}
352
353			/**
354			* Serialize geometries into a GPX string.
355			*
356			* @param Geometry\|GeometryCollection $geometry
357			* @param string $namespace
358			* @param array<array> $allowedElements Which elements can be added to each GPX type
359			* If not specified, every element defined in the GPX specification can be added
360			* Can be overwritten with an associative array, with type name in keys.
361			* eg.: ['wptType' => ['ele', 'name'], 'trkptType' => ['ele'], 'metadataType' => null]
362			* @return string The GPX string representation of the input geometries
363			*/
364			public function write(Geometry $geometry, string $namespace = '', array $allowedElements = []): string
365			{
366			$namespace = trim($namespace);
367			if (!empty($namespace)) {
368			$this->nss = $namespace . ':';
369			}
370			$this->gpxTypes = new GpxTypes($allowedElements);
371
372			return
373			'<?xml version="1.0" encoding="UTF-8"?>
374			<' . $this->nss . 'gpx creator="geoPHP" version="1.1"
375			xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
376			xmlns="http://www.topografix.com/GPX/1/1"
377			xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd" >
378
379			' . $this->geometryToGPX($geometry) .
380			'</' . $this->nss . 'gpx>
381			';
382			}
383
384			/**
385			* @param Geometry\|Collection $geometry
386			* @return string
387			*/
388			protected function geometryToGPX($geometry): string
389			{
390			switch ($geometry->geometryType()) {
391			case Geometry::POINT:
392			/** @var Point $geometry */
393			return $this->pointToGPX($geometry);
394			case Geometry::LINESTRING:
395			case Geometry::MULTI_LINESTRING:
396			/** @var LineString $geometry */
397			return $this->linestringToGPX($geometry);
398			case Geometry::POLYGON:
399			case Geometry::MULTI_POINT:
400			case Geometry::MULTI_POLYGON:
401			case Geometry::GEOMETRY_COLLECTION:
402			/** @var GeometryCollection $geometry */
403			return $this->collectionToGPX($geometry);
404			}
405			return '';
406			}
407
408			/**
409			* @param Point $geom
410			* @param string $tag Can be "wpt", "trkpt" or "rtept"
411			* @return string
412			*/
413			private function pointToGPX($geom, $tag = 'wpt'): string
414			{
415			if ($geom->isEmpty() \|\| ($tag === 'wpt' && !in_array($tag, $this->gpxTypes->get('gpxType')))) {
416			return '';
417			}
418			$indent = $tag === 'trkpt' ? "\t\t" : ($tag === 'rtept' ? "\t" : '');
419
420			if ($geom->hasZ() \|\| $geom->getData() !== null) {
421			$node = $indent . "<" . $this->nss . $tag . " lat=\"" . $geom->getY() . "\" lon=\"" . $geom->getX() . "\">\n";
422			if ($geom->hasZ()) {
423			$geom->setData('ele', $geom->getZ());
424			}
425			$node .= self::processGeometryData($geom, $this->gpxTypes->get($tag . 'Type'), $indent . "\t") .
426			$indent . "</" . $this->nss . $tag . ">\n";
427			if ($geom->hasZ()) {
428			$geom->setData('ele', null);
429			}
430			return $node;
431			}
432			return $indent . "<" . $this->nss . $tag . " lat=\"" . $geom->getY() . "\" lon=\"" . $geom->getX() . "\" />\n";
433			}
434
435			/**
436			* Writes a LineString or MultiLineString to the GPX
437			*
438			* The (Multi)LineString will be included in a <trk></trk> block
439			* The LineString or each LineString of the MultiLineString will be in <trkseg> </trkseg> inside the <trk>
440			*
441			* @param LineString\|MultiLineString $geom
442			* @return string
443			*/
444			private function linestringToGPX($geom): string
445			{
446			$isTrack = $geom->getData('gpxType') === 'route' ? false : true;
447			if ($geom->isEmpty() \|\| !in_array($isTrack ? 'trk' : 'rte', $this->gpxTypes->get('gpxType'))) {
448			return '';
449			}
450
451			if ($isTrack) { // write as <trk>
452			/** @noinspection SpellCheckingInspection */
453			$gpx = "<" . $this->nss . "trk>\n" . self::processGeometryData($geom, $this->gpxTypes->get('trkType'));
454			$components = $geom->geometryType() === 'LineString' ? [$geom] : $geom->getComponents();
455			foreach ($components as $lineString) {
456			$gpx .= "\t<" . $this->nss . "trkseg>\n";
457			foreach ($lineString->getPoints() as $point) {
458			$gpx .= $this->pointToGPX($point, 'trkpt');
459			}
460			$gpx .= "\t</" . $this->nss . "trkseg>\n";
461			}
462			/** @noinspection SpellCheckingInspection */
463			$gpx .= "</" . $this->nss . "trk>\n";
464			} else { // write as <rte>
465			/** @noinspection SpellCheckingInspection */
466			$gpx = "<" . $this->nss . "rte>\n" . self::processGeometryData($geom, $this->gpxTypes->get('rteType'));
467			foreach ($geom->getPoints() as $point) {
468			$gpx .= $this->pointToGPX($point, 'rtept');
469			}
470			/** @noinspection SpellCheckingInspection */
471			$gpx .= "</" . $this->nss . "rte>\n";
472			}
473
474			return $gpx;
475			}
476
477			/**
478			* @param Collection $geometry
479			* @return string
480			*/
481			public function collectionToGPX($geometry): string
482			{
483			$metadata = self::processGeometryData($geometry, $this->gpxTypes->get('metadataType'));
484			$metadata = empty($metadata) \|\| !in_array('metadataType', $this->gpxTypes->get('gpxType')) ?
485			'' : "<metadata>\n" . $metadata . "</metadata>\n\n";
486			$wayPoints = $routes = $tracks = "";
487
488			foreach ($geometry->getComponents() as $component) {
489			$geometryType = $component->geometryType();
490
491			if (strpos($geometryType, 'Point') !== false) {
492			$wayPoints .= $this->geometryToGPX($component);
493			} elseif (strpos($geometryType, 'Linestring') !== false) {
494			if ($component->getData('gpxType') === 'route') {
495			$routes .= $this->geometryToGPX($component);
496			} else {
497			$tracks .= $this->geometryToGPX($component);
498			}
499			} else {
500			return $this->geometryToGPX($component);
501			}
502			}
503
504			return $metadata . $wayPoints . $routes . $tracks;
505			}
506
507			/**
508			* @param Geometry $geometry
509			* @param string[] $tagList Allowed tags
510			* @param string $indent
511			* @return string
512			*/
513			protected static function processGeometryData($geometry, $tagList, $indent = "\t"): string
514			{
515			$tags = '';
516			if ($geometry->getData() !== null) {
517			foreach ($tagList as $tagName) {
518			if ($geometry->hasDataProperty($tagName)) {
519			$tags .= self::createNodes($tagName, $geometry->getData($tagName), $indent) . "\n";
520			}
521			}
522			}
523			return $tags;
524			}
525
526			/**
527			* @param string $tagName
528			* @param string\|array<array> $value
529			* @param string $indent
530			* @return string
531			*/
532			protected static function createNodes($tagName, $value, $indent): string
533			{
534			$attributes = '';
535			if (!is_array($value)) {
536			$returnValue = $value;
537			} else {
538			$returnValue = '';
539			if (array_key_exists('@attributes', $value)) {
540			$attributes = '';
541			foreach ($value['@attributes'] as $attributeName => $attributeValue) {
542			$attributes .= ' ' . $attributeName . '="' . $attributeValue . '"';
543			}
544			unset($value['@attributes']);
545			}
546			foreach ($value as $subKey => $subValue) {
547			$returnValue .= "\n" . self::createNodes($subKey, $subValue, $indent . "\t") . "\n" . $indent;
548			}
549			}
550			return $indent . "<{$tagName}{$attributes}>{$returnValue}</{$tagName}>";
551			}
552			}
553

swen100 / geoPHP

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GPX::linestringToGPX() B

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