Collection::isEmpty() - Code Metrics - swen100/geoPHP - Measure and Improve Code Quality continuously with Scrutinizer

Collection::isEmpty() A
last analyzed 2022-08-18 15:20 UTC

↳ Parent: Collection

Complexity

Conditions	3
Paths	3

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
eloc	4
c	1
b	0
f	0
dl	0
loc	8
rs	10
cc	3
nc	3
nop	0

<?php

namespace geoPHP\Geometry;

use geoPHP\Exception\InvalidGeometryException;
use geoPHP\geoPHP;

/**
 * Collection: Abstract class for compound geometries
 *
 * A geometry is a collection if it is made up of other component geometries. Therefore everything except a Point
 * is a Collection. For example a LingString is a collection of Points. A Polygon is a collection of LineStrings etc.
 *
 * @package GeoPHPGeometry
 */
abstract class Collection extends Geometry
{

    /**
     * @var Geometry[]|Collection[]
     */
    protected $components = [];

    /**
     * @var bool True if Geometry has Z (altitude) value
     */
    protected $hasZ = false;

    /**
     * @var bool True if Geometry has M (measure) value
     */
    protected $isMeasured = false;
    
    /**
     * Constructor: Checks and sets component geometries
     *
     * @param  Geometry[] $components           array of geometries
     * @param  bool       $allowEmptyComponents Allow creating geometries with empty components. Default false.
     * @param  string     $allowedComponentType A class-type the components have to be instance of.
     * @throws InvalidGeometryException
     */
    public function __construct(
        array $components = [],
        bool $allowEmptyComponents = false,
        string $allowedComponentType = Geometry::class
    ) {
        $componentCount = count($components);
        for ($i = 0; $i < $componentCount; ++$i) {
            if ($components[$i] instanceof $allowedComponentType) {
                if (!$allowEmptyComponents && $components[$i]->isEmpty()) {
                    throw new InvalidGeometryException(
                        'Cannot create a collection of empty ' .
                            $components[$i]->geometryType() . 's (' . ($i + 1) . '. component)'
                    );
                }
                if ($components[$i]->hasZ() && !$this->hasZ) {
                    $this->hasZ = true;
                }
                if ($components[$i]->isMeasured() && !$this->isMeasured) {
                    $this->isMeasured = true;
                }
            } else {
                $componentType = gettype($components[$i]) !== 'object' ?
                    gettype($components[$i]) : get_class($components[$i]);
                
                throw new InvalidGeometryException(
                    'Cannot create a collection of ' . $componentType . ' components, ' .
                        'expected type is ' . $allowedComponentType
                );
            }
        }
        
        $this->components = $components;
    }

    /**
     * Returns Collection component geometries
     *
     * @return Geometry[]
     */
    public function getComponents(): array
    {
        return $this->components;
    }

    /**
     * Inverts x and y coordinates
     * Useful for old data still using lng lat
     *
     * @return self
     * */
    public function invertXY(): self
    {
        foreach ($this->components as $component) {
            $component->invertXY();
        }
        $this->setGeos(null);
        return $this;
    }

    /**
     * @return array{'minx'?:float|null, 'miny'?:float|null, 'maxx'?:float|null, 'maxy'?:float|null}
     */
    public function getBBox(): array
    {
        if ($this->isEmpty()) {
            return [];
        }

        // use GEOS library
        $geosObj = $this->getGeos();
        if (is_object($geosObj)) {
            return $this->getBBoxWithGeos($geosObj);
        }

        // Go through each component and get the max and min x and y
        $maxX = $maxY = $minX = $minY = 0;
        foreach ($this->components as $i => $component) {
            $componentBoundingBox = $component->getBBox();

            if (empty($componentBoundingBox)) {
                continue;
            }
            
            // On the first run through, set the bounding box to the component's bounding box
            if ($i === 0) {
                $maxX = $componentBoundingBox['maxx'];
                $maxY = $componentBoundingBox['maxy'];
                $minX = $componentBoundingBox['minx'];
                $minY = $componentBoundingBox['miny'];
            }

            // Do a check and replace on each boundary, slowly growing the bounding box
            $maxX = $componentBoundingBox['maxx'] > $maxX ? $componentBoundingBox['maxx'] : $maxX;
            $maxY = $componentBoundingBox['maxy'] > $maxY ? $componentBoundingBox['maxy'] : $maxY;
            $minX = $componentBoundingBox['minx'] < $minX ? $componentBoundingBox['minx'] : $minX;
            $minY = $componentBoundingBox['miny'] < $minY ? $componentBoundingBox['miny'] : $minY;
        }

        return [
            'maxy' => $maxY,
            'miny' => $minY,
            'maxx' => $maxX,
            'minx' => $minX,
        ];
    }
    
    /**
     * @param \GEOSGeometry $geosObj
     * @return array{'minx'?:float|null, 'miny'?:float|null, 'maxx'?:float|null, 'maxy'?:float|null}
     */
    private function getBBoxWithGeos($geosObj): array
    {
        // @codeCoverageIgnoreStart
        /** @noinspection PhpUndefinedMethodInspection */
        $envelope = $geosObj->envelope();
        
        /** @noinspection PhpUndefinedMethodInspection */
        if ($envelope->typeName() === 'Point') {
            return geoPHP::geosToGeometry($envelope)->getBBox();
        }

        /** @noinspection PhpUndefinedMethodInspection */
        $geosRing = $envelope->exteriorRing();
        
        /** @noinspection PhpUndefinedMethodInspection */
        return [
            'maxy' => $geosRing->pointN(3)->getY(),
            'miny' => $geosRing->pointN(1)->getY(),
            'maxx' => $geosRing->pointN(1)->getX(),
            'minx' => $geosRing->pointN(3)->getX(),
        ];
        // @codeCoverageIgnoreEnd
    }
    
    /**
     * check if Geometry has a measure value
     *
     * @return bool true if collection has measure values
     */
    public function isMeasured(): bool
    {
        return $this->isMeasured;
    }

    /**
     * check if Geometry has Z (altitude) coordinate
     *
     * @return bool true if geometry has a Z-value
     */
    public function hasZ(): bool
    {
        return $this->hasZ;
    }
    
    /**
     * Returns every sub-geometry as a multidimensional array
     *
     * @return array<int, array>
     */
    public function asArray(): array
    {
        $array = [];
        foreach ($this->components as $component) {
            $array[] = $component->asArray();
        }
        return $array;
    }

    /**
     * @return int
     */
    public function numGeometries(): int
    {
        return count($this->components);
    }

    /**
     * Returns the 1-based Nth geometry.
     *
     * @param  int $n 1-based geometry number
     * @return Geometry|null
     */
    public function geometryN(int $n)
    {
        return isset($this->components[$n - 1]) ? $this->components[$n - 1] : null;
    }

    /**
     * A collection is not empty if it has at least one non empty component.
     *
     * @return bool
     */
    public function isEmpty(): bool
    {
        foreach ($this->components as $component) {
            if (!$component->isEmpty()) {
                return false;
            }
        }
        return true;
    }

    /**
     * @return int
     */
    public function numPoints(): int
    {
        $num = 0;
        foreach ($this->components as $component) {
            $num += $component->numPoints();
        }
        return $num;
    }

    /**
     * @return Point[]
     */
    public function getPoints(): array
    {
        $points = [];

        // Same as array_merge($points, $component->getPoints()), but 500× faster
        static::getPointsRecursive($this, $points);
        return $points;
    }

    /**
     * @param  Collection $geometry The geometry from which points will be extracted
     * @param  Point[]    $points   Result array as reference
     * @return void
     */
    private static function getPointsRecursive(Geometry $geometry, array &$points)
    {
        foreach ($geometry->components as $component) {
            if ($component instanceof Point) {
                $points[] = $component;
            } else {
                /** @var Collection $component */
                static::getPointsRecursive($component, $points);
            }
        }
    }

    /**
     * Returns TRUE if the given Geometries are "spatially equal".
     * Ordering of points can be different but represent the same geometry structure
     *
     * @param  Geometry $geometry
     * @return bool
     */
    public function equals(Geometry $geometry): bool
    {
        $geosObj = $this->getGeos();
        if (is_object($geosObj)) {
            // @codeCoverageIgnoreStart
            /** @noinspection PhpUndefinedMethodInspection */
            $geosObj2 = $geometry->getGeos();
            return is_object($geosObj2) ? $geosObj->equals($geosObj2) : false;
            // @codeCoverageIgnoreEnd
        }

        $thisPoints = $this->getPoints();
        $otherPoints = $geometry->getPoints();

        /*
        // using some sort of simplification method that strips redundant vertices (that are all in a row)
        // Hint: this mehtod is mostly slower as long as number of points is less than 1000
        $asWkt = function(Point $pt){
            return implode(' ', $pt->asArray());
        };
        $ptsA = array_unique(array_map($asWkt, $thisPoints));
        $ptsB = array_unique(array_map($asWkt, $otherPoints));

        return count(array_diff($ptsA, $ptsB)) === 0;
        */
        
        // To test for equality we check to make sure that there is a matching point
        // in the other geometry for every point in this geometry.
        // This is slightly more strict than the standard, which
        // uses Within(A,B) = true and Within(B,A) = true
        
        // First do a check to make sure they have the same number of vertices
        if (count($thisPoints) !== count($otherPoints)) {
            return false;
        }

        foreach ($thisPoints as $point) {
            $foundMatch = false;
            foreach ($otherPoints as $key => $testPoint) {
                if ($point->equals($testPoint)) {
                    $foundMatch = true;
                    unset($otherPoints[$key]);
                    break;
                }
            }
            if (!$foundMatch) {
                return false;
            }
        }

        // All points match, return TRUE
        return true;
    }

    /**
     * Get all underlying components separated
     *
     * @param  bool $toArray return underlying components as LineStrings/Points or as array of coordinate values.
     * @return LineString[]|Point[]|array{}|array<array>
     */
    public function explode(bool $toArray = false): array
    {
        $parts = [];
        foreach ($this->getComponents() as $component) {
            foreach ($component->explode($toArray) as $part) {
                $parts[] = $part;
            }
        }
        return $parts;
    }

    /**
     * @return void
     */
    public function flatten()
    {
        if ($this->hasZ() || $this->isMeasured()) {
            foreach ($this->getComponents() as $component) {
                $component->flatten();
            }
            $this->hasZ = false;
            $this->isMeasured = false;
            $this->setGeos(null);
        }
    }

    /**
     * @return float|null
     */
    public function distance(Geometry $geometry)
    {
        $geosObj = $this->getGeos();
        if (is_object($geosObj)) {
            // @codeCoverageIgnoreStart
            /** @noinspection PhpUndefinedMethodInspection */
            $geosObj2 = $geometry->getGeos();
            return is_object($geosObj2) ? $geosObj->distance($geosObj2) : null;
            // @codeCoverageIgnoreEnd
        }
        
        $distance = null;
        foreach ($this->getComponents() as $component) {
            $checkDistance = $component->distance($geometry);
            if ($checkDistance === 0.0) {
                return 0.0;
            }
            if ($checkDistance === null) {
                continue;
            }
            $distance = ($distance ?? $checkDistance);

            if ($checkDistance < $distance) {
                $distance = $checkDistance;
            }
        }
        
        return $distance;
    }
    
    public function translate($dx = 0, $dy = 0, $dz = 0)
    {
        foreach ($this->getComponents() as $component) {
            $component->translate($dx, $dy, $dz);
        }
    }
}


1			<?php
2
3			namespace geoPHP\Geometry;
4
5			use geoPHP\Exception\InvalidGeometryException;
6			use geoPHP\geoPHP;
7
8			/**
9			* Collection: Abstract class for compound geometries
10			*
11			* A geometry is a collection if it is made up of other component geometries. Therefore everything except a Point
12			* is a Collection. For example a LingString is a collection of Points. A Polygon is a collection of LineStrings etc.
13			*
14			* @package GeoPHPGeometry
15			*/
16			abstract class Collection extends Geometry
17			{
18
19			/**
20			* @var Geometry[]\|Collection[]
21			*/
22			protected $components = [];
23
24			/**
25			* @var bool True if Geometry has Z (altitude) value
26			*/
27			protected $hasZ = false;
28
29			/**
30			* @var bool True if Geometry has M (measure) value
31			*/
32			protected $isMeasured = false;
33
34			/**
35			* Constructor: Checks and sets component geometries
36			*
37			* @param Geometry[] $components array of geometries
38			* @param bool $allowEmptyComponents Allow creating geometries with empty components. Default false.
39			* @param string $allowedComponentType A class-type the components have to be instance of.
40			* @throws InvalidGeometryException
41			*/
42			public function __construct(
43			array $components = [],
44			bool $allowEmptyComponents = false,
45			string $allowedComponentType = Geometry::class
46			) {
47			$componentCount = count($components);
48			for ($i = 0; $i < $componentCount; ++$i) {
49			if ($components[$i] instanceof $allowedComponentType) {
50			if (!$allowEmptyComponents && $components[$i]->isEmpty()) {
51			throw new InvalidGeometryException(
52			'Cannot create a collection of empty ' .
53			$components[$i]->geometryType() . 's (' . ($i + 1) . '. component)'
54			);
55			}
56			if ($components[$i]->hasZ() && !$this->hasZ) {
57			$this->hasZ = true;
58			}
59			if ($components[$i]->isMeasured() && !$this->isMeasured) {
60			$this->isMeasured = true;
61			}
62			} else {
63			$componentType = gettype($components[$i]) !== 'object' ?
64			gettype($components[$i]) : get_class($components[$i]);
65
66			throw new InvalidGeometryException(
67			'Cannot create a collection of ' . $componentType . ' components, ' .
68			'expected type is ' . $allowedComponentType
69			);
70			}
71			}
72
73			$this->components = $components;
74			}
75
76			/**
77			* Returns Collection component geometries
78			*
79			* @return Geometry[]
80			*/
81			public function getComponents(): array
82			{
83			return $this->components;
84			}
85
86			/**
87			* Inverts x and y coordinates
88			* Useful for old data still using lng lat
89			*
90			* @return self
91			* */
92			public function invertXY(): self
93			{
94			foreach ($this->components as $component) {
95			$component->invertXY();
96			}
97			$this->setGeos(null);
98			return $this;
99			}
100
101			/**
102			* @return array{'minx'?:float\|null, 'miny'?:float\|null, 'maxx'?:float\|null, 'maxy'?:float\|null}
103			*/
104			public function getBBox(): array
105			{
106			if ($this->isEmpty()) {
107			return [];
108			}
109
110			// use GEOS library
111			$geosObj = $this->getGeos();
112			if (is_object($geosObj)) {
113			return $this->getBBoxWithGeos($geosObj);
114			}
115
116			// Go through each component and get the max and min x and y
117			$maxX = $maxY = $minX = $minY = 0;
118			foreach ($this->components as $i => $component) {
119			$componentBoundingBox = $component->getBBox();
120
121			if (empty($componentBoundingBox)) {
122			continue;
123			}
124
125			// On the first run through, set the bounding box to the component's bounding box
126			if ($i === 0) {
127			$maxX = $componentBoundingBox['maxx'];
128			$maxY = $componentBoundingBox['maxy'];
129			$minX = $componentBoundingBox['minx'];
130			$minY = $componentBoundingBox['miny'];
131			}
132
133			// Do a check and replace on each boundary, slowly growing the bounding box
134			$maxX = $componentBoundingBox['maxx'] > $maxX ? $componentBoundingBox['maxx'] : $maxX;
135			$maxY = $componentBoundingBox['maxy'] > $maxY ? $componentBoundingBox['maxy'] : $maxY;
136			$minX = $componentBoundingBox['minx'] < $minX ? $componentBoundingBox['minx'] : $minX;
137			$minY = $componentBoundingBox['miny'] < $minY ? $componentBoundingBox['miny'] : $minY;
138			}
139
140			return [
141			'maxy' => $maxY,
142			'miny' => $minY,
143			'maxx' => $maxX,
144			'minx' => $minX,
145			];
146			}
147
148			/**
149			* @param \GEOSGeometry $geosObj
150			* @return array{'minx'?:float\|null, 'miny'?:float\|null, 'maxx'?:float\|null, 'maxy'?:float\|null}
151			*/
152			private function getBBoxWithGeos($geosObj): array
153			{
154			// @codeCoverageIgnoreStart
155			/** @noinspection PhpUndefinedMethodInspection */
156			$envelope = $geosObj->envelope();
157
158			/** @noinspection PhpUndefinedMethodInspection */
159			if ($envelope->typeName() === 'Point') {
160			return geoPHP::geosToGeometry($envelope)->getBBox();
161			}
162
163			/** @noinspection PhpUndefinedMethodInspection */
164			$geosRing = $envelope->exteriorRing();
165
166			/** @noinspection PhpUndefinedMethodInspection */
167			return [
168			'maxy' => $geosRing->pointN(3)->getY(),
169			'miny' => $geosRing->pointN(1)->getY(),
170			'maxx' => $geosRing->pointN(1)->getX(),
171			'minx' => $geosRing->pointN(3)->getX(),
172			];
173			// @codeCoverageIgnoreEnd
174			}
175
176			/**
177			* check if Geometry has a measure value
178			*
179			* @return bool true if collection has measure values
180			*/
181			public function isMeasured(): bool
182			{
183			return $this->isMeasured;
184			}
185
186			/**
187			* check if Geometry has Z (altitude) coordinate
188			*
189			* @return bool true if geometry has a Z-value
190			*/
191			public function hasZ(): bool
192			{
193			return $this->hasZ;
194			}
195
196			/**
197			* Returns every sub-geometry as a multidimensional array
198			*
199			* @return array<int, array>
200			*/
201			public function asArray(): array
202			{
203			$array = [];
204			foreach ($this->components as $component) {
205			$array[] = $component->asArray();
206			}
207			return $array;
208			}
209
210			/**
211			* @return int
212			*/
213			public function numGeometries(): int
214			{
215			return count($this->components);
216			}
217
218			/**
219			* Returns the 1-based Nth geometry.
220			*
221			* @param int $n 1-based geometry number
222			* @return Geometry\|null
223			*/
224			public function geometryN(int $n)
225			{
226			return isset($this->components[$n - 1]) ? $this->components[$n - 1] : null;
227			}
228
229			/**
230			* A collection is not empty if it has at least one non empty component.
231			*
232			* @return bool
233			*/
234			public function isEmpty(): bool
235			{
236			foreach ($this->components as $component) {
237			if (!$component->isEmpty()) {
238			return false;
239			}
240			}
241			return true;
242			}
243
244			/**
245			* @return int
246			*/
247			public function numPoints(): int
248			{
249			$num = 0;
250			foreach ($this->components as $component) {
251			$num += $component->numPoints();
252			}
253			return $num;
254			}
255
256			/**
257			* @return Point[]
258			*/
259			public function getPoints(): array
260			{
261			$points = [];
262
263			// Same as array_merge($points, $component->getPoints()), but 500× faster
264			static::getPointsRecursive($this, $points);
265			return $points;
266			}
267
268			/**
269			* @param Collection $geometry The geometry from which points will be extracted
270			* @param Point[] $points Result array as reference
271			* @return void
272			*/
273			private static function getPointsRecursive(Geometry $geometry, array &$points)
274			{
275			foreach ($geometry->components as $component) {
276			if ($component instanceof Point) {
277			$points[] = $component;
278			} else {
279			/** @var Collection $component */
280			static::getPointsRecursive($component, $points);
281			}
282			}
283			}
284
285			/**
286			* Returns TRUE if the given Geometries are "spatially equal".
287			* Ordering of points can be different but represent the same geometry structure
288			*
289			* @param Geometry $geometry
290			* @return bool
291			*/
292			public function equals(Geometry $geometry): bool
293			{
294			$geosObj = $this->getGeos();
295			if (is_object($geosObj)) {
296			// @codeCoverageIgnoreStart
297			/** @noinspection PhpUndefinedMethodInspection */
298			$geosObj2 = $geometry->getGeos();
299			return is_object($geosObj2) ? $geosObj->equals($geosObj2) : false;
300			// @codeCoverageIgnoreEnd
301			}
302
303			$thisPoints = $this->getPoints();
304			$otherPoints = $geometry->getPoints();
305
306			/*
307			// using some sort of simplification method that strips redundant vertices (that are all in a row)
308			// Hint: this mehtod is mostly slower as long as number of points is less than 1000
309			$asWkt = function(Point $pt){
310			return implode(' ', $pt->asArray());
311			};
312			$ptsA = array_unique(array_map($asWkt, $thisPoints));
313			$ptsB = array_unique(array_map($asWkt, $otherPoints));
314
315			return count(array_diff($ptsA, $ptsB)) === 0;
316			*/
317
318			// To test for equality we check to make sure that there is a matching point
319			// in the other geometry for every point in this geometry.
320			// This is slightly more strict than the standard, which
321			// uses Within(A,B) = true and Within(B,A) = true
322
323			// First do a check to make sure they have the same number of vertices
324			if (count($thisPoints) !== count($otherPoints)) {
325			return false;
326			}
327
328			foreach ($thisPoints as $point) {
329			$foundMatch = false;
330			foreach ($otherPoints as $key => $testPoint) {
331			if ($point->equals($testPoint)) {
332			$foundMatch = true;
333			unset($otherPoints[$key]);
334			break;
335			}
336			}
337			if (!$foundMatch) {
338			return false;
339			}
340			}
341
342			// All points match, return TRUE
343			return true;
344			}
345
346			/**
347			* Get all underlying components separated
348			*
349			* @param bool $toArray return underlying components as LineStrings/Points or as array of coordinate values.
350			* @return LineString[]\|Point[]\|array{}\|array<array>
351			*/
352			public function explode(bool $toArray = false): array
353			{
354			$parts = [];
355			foreach ($this->getComponents() as $component) {
356			foreach ($component->explode($toArray) as $part) {
357			$parts[] = $part;
358			}
359			}
360			return $parts;
361			}
362
363			/**
364			* @return void
365			*/
366			public function flatten()
367			{
368			if ($this->hasZ() \|\| $this->isMeasured()) {
369			foreach ($this->getComponents() as $component) {
370			$component->flatten();
371			}
372			$this->hasZ = false;
373			$this->isMeasured = false;
374			$this->setGeos(null);
375			}
376			}
377
378			/**
379			* @return float\|null
380			*/
381			public function distance(Geometry $geometry)
382			{
383			$geosObj = $this->getGeos();
384			if (is_object($geosObj)) {
385			// @codeCoverageIgnoreStart
386			/** @noinspection PhpUndefinedMethodInspection */
387			$geosObj2 = $geometry->getGeos();
388			return is_object($geosObj2) ? $geosObj->distance($geosObj2) : null;
389			// @codeCoverageIgnoreEnd
390			}
391
392			$distance = null;
393			foreach ($this->getComponents() as $component) {
394			$checkDistance = $component->distance($geometry);
395			if ($checkDistance === 0.0) {
396			return 0.0;
397			}
398			if ($checkDistance === null) {
399			continue;
400			}
401			$distance = ($distance ?? $checkDistance);
402
403			if ($checkDistance < $distance) {
404			$distance = $checkDistance;
405			}
406			}
407
408			return $distance;
409			}
410
411			public function translate($dx = 0, $dy = 0, $dz = 0)
412			{
413			foreach ($this->getComponents() as $component) {
414			$component->translate($dx, $dy, $dz);
415			}
416			}
417			}
418

swen100 / geoPHP

Collection::isEmpty() A last analyzed 2022-08-18 15:20 UTC

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Collection::isEmpty() A
last analyzed 2022-08-18 15:20 UTC