LayerPacker::checkNonDimensionalConstraints() - Code Metrics - Inspection of "Bump to a version of PHP-CS-Fixer that works on PH..." - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

Passed

Push — 3.x ( 922c95...5b6501 )

by Doug

created 2021-01-25 20:16 UTC

LayerPacker::checkNonDimensionalConstraints() A

↳ Parent: LayerPacker

Complexity

Conditions	4
Paths	4

Size

Total Lines	8
Code Lines	4

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	5
CRAP Score	4

Importance

Changes	1
Bugs	0	Features	0

Metric	Value
cc	4
eloc	4
c	1
b	0
f	0
nc	4
nop	3
dl	0
loc	8
ccs	5
cts	5
cp	1
crap	4
rs	10

<?php
/**
 * Box packing (3D bin packing, knapsack problem).
 *
 * @author Doug Wright
 */
declare(strict_types=1);

namespace DVDoug\BoxPacker;

use function array_merge;
use function iterator_to_array;
use function max;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;
use function sort;

/**
 * Layer packer.
 *
 * @internal
 * @author Doug Wright
 */
class LayerPacker implements LoggerAwareInterface
{
    /**
     * The logger instance.
     *
     * @var LoggerInterface
     */
    private $logger;

    /**
     * Box to pack items into.
     *
     * @var Box
     */
    private $box;

    /**
     * Whether the packer is in single-pass mode.
     *
     * @var bool
     */
    private $singlePassMode = false;

    /**
     * @var OrientatedItemFactory
     */
    private $orientatedItemFactory;

    /**
     * Constructor.
     */
    public function __construct(Box $box)
    {
        $this->box = $box;
        $this->logger = new NullLogger();

        $this->orientatedItemFactory = new OrientatedItemFactory($this->box);
        $this->orientatedItemFactory->setLogger($this->logger);
    }

    /**
     * Sets a logger.
     */
    public function setLogger(LoggerInterface $logger): void
    {
        $this->logger = $logger;
        $this->orientatedItemFactory->setLogger($logger);
    }

    public function setSinglePassMode(bool $singlePassMode): void
    {
        $this->singlePassMode = $singlePassMode;
        $this->orientatedItemFactory->setSinglePassMode($singlePassMode);
    }

    /**
     * Pack items into an individual vertical layer.
     */
    public function packLayer(ItemList &$items, PackedItemList $packedItemList, array $layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): PackedLayer
    {
        $layer = new PackedLayer();
        $prevItem = null;
        $x = $y = $rowLength = 0;
        $skippedItems = [];
        $remainingWeightAllowed = $this->getRemainingWeightAllowed($layers);

        while ($items->count() > 0) {
            $itemToPack = $items->extract();

            //skip items that will never fit e.g. too heavy
            if (!$this->checkNonDimensionalConstraints($itemToPack, $remainingWeightAllowed, $packedItemList)) {
                continue;
            }

            $orientatedItem = $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevItem, $items, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z, $packedItemList);

            if ($orientatedItem instanceof OrientatedItem) {
                $packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
                $layer->insert($packedItem);
                $remainingWeightAllowed -= $itemToPack->getWeight();
                $packedItemList->insert($packedItem);

                $rowLength = max($rowLength, $packedItem->getLength());

                //Figure out if we can stack the next item vertically on top of this rather than side by side
                //e.g. when we've packed a tall item, and have just put a shorter one next to it.
                $this->packVerticallyInsideItemFootprint($layer, $packedItem, $packedItemList, $items, $remainingWeightAllowed, $guidelineLayerDepth, $rowLength, $x, $y, $z);
                $x += $packedItem->getWidth();

                $prevItem = $orientatedItem;
                if ($items->count() === 0) {
                    $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                    $skippedItems = [];
                }
                continue;
            }

            if ($items->count() > 0) { // skip for now, move on to the next item
                $this->logger->debug("doesn't fit, skipping for now");
                $skippedItems[] = $itemToPack;
                // abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
                while ($items->count() > 1 && static::isSameDimensions($itemToPack, $items->top())) {
                    $skippedItems[] = $items->extract();
                }
                continue;
            }

            if ($x > 0) {
                $this->logger->debug('No more fit in width wise, resetting for new row');
                $lengthLeft -= $rowLength;
                $y += $rowLength;
                $x = $rowLength = 0;
                $skippedItems[] = $itemToPack;
                $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
                $skippedItems = [];
                $prevItem = null;
                continue;
            }

            $this->logger->debug('no items fit, so starting next vertical layer');
            $skippedItems[] = $itemToPack;

            $items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);

            return $layer;
        }

        return $layer;
    }

    private function packVerticallyInsideItemFootprint(PackedLayer $layer, PackedItem $packedItem, PackedItemList $packedItemList, ItemList &$items, int &$remainingWeightAllowed, int $guidelineLayerDepth, int $rowLength, int $x, int $y, int $z): void
    {
        $stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $packedItem->getDepth();
        $stackedZ = $z + $packedItem->getDepth();
        $stackSkippedItems = [];
        $stackedItem = $packedItem->toOrientatedItem();
        while ($stackableDepth > 0 && $items->count() > 0) {
            $itemToTryStacking = $items->extract();

            //skip items that will never fit
            if (!$this->checkNonDimensionalConstraints($itemToTryStacking, $remainingWeightAllowed, $packedItemList)) {
                continue;
            }

            $stackedItem = $this->orientatedItemFactory->getBestOrientation($itemToTryStacking, $stackedItem, $items, $packedItem->getWidth(), $packedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ, $packedItemList);
            if ($stackedItem) {
                $packedStackedItem = PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ);
                $layer->insert($packedStackedItem);
                $remainingWeightAllowed -= $itemToTryStacking->getWeight();
                $packedItemList->insert($packedStackedItem);
                $stackableDepth -= $stackedItem->getDepth();
                $stackedZ += $stackedItem->getDepth();
                continue;
            }

            $stackSkippedItems[] = $itemToTryStacking;
            // abandon here if next item is the same, no point trying to keep going
            while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
                $stackSkippedItems[] = $items->extract();
            }
        }
        $items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
    }

    /**
     * As well as purely dimensional constraints, there are other constraints that need to be met
     * e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
     */
    private function checkNonDimensionalConstraints(Item $itemToPack, int $remainingWeightAllowed, PackedItemList $packedItemList): bool
    {
        $customConstraintsOK = true;
        if ($itemToPack instanceof ConstrainedItem && !$this->box instanceof WorkingVolume) {
            $customConstraintsOK = $itemToPack->canBePackedInBox($packedItemList, $this->box);
        }

        return $customConstraintsOK && $itemToPack->getWeight() <= $remainingWeightAllowed;
    }

    private function getRemainingWeightAllowed(array $layers): int
    {
        $remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
        foreach ($layers as $layer) {
            $remainingWeightAllowed -= $layer->getWeight();
        }

        return $remainingWeightAllowed;
    }

    /**
     * Compare two items to see if they have same dimensions.
     */
    private static function isSameDimensions(Item $itemA, Item $itemB): bool
    {
        if ($itemA === $itemB) {
            return true;
        }
        $itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
        $itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
        sort($itemADimensions);
        sort($itemBDimensions);

        return $itemADimensions === $itemBDimensions;
    }
}


1		<?php
2		/**
3		* Box packing (3D bin packing, knapsack problem).
4		*
5		* @author Doug Wright
6		*/
7		declare(strict_types=1);
8
9		namespace DVDoug\BoxPacker;
10
11		use function array_merge;
12		use function iterator_to_array;
13		use function max;
14		use Psr\Log\LoggerAwareInterface;
15		use Psr\Log\LoggerInterface;
16		use Psr\Log\NullLogger;
17		use function sort;
18
19		/**
20		* Layer packer.
21		*
22		* @internal
23		* @author Doug Wright
24		*/
25		class LayerPacker implements LoggerAwareInterface
26		{
27		/**
28		* The logger instance.
29		*
30		* @var LoggerInterface
31		*/
32		private $logger;
33
34		/**
35		* Box to pack items into.
36		*
37		* @var Box
38		*/
39		private $box;
40
41		/**
42		* Whether the packer is in single-pass mode.
43		*
44		* @var bool
45		*/
46		private $singlePassMode = false;
47
48		/**
49		* @var OrientatedItemFactory
50		*/
51		private $orientatedItemFactory;
52
53		/**
54		* Constructor.
55		*/
56	73	public function __construct(Box $box)
57		{
58	73	$this->box = $box;
59	73	$this->logger = new NullLogger();
60
61	73	$this->orientatedItemFactory = new OrientatedItemFactory($this->box);
62	73	$this->orientatedItemFactory->setLogger($this->logger);
63	73	}
64
65		/**
66		* Sets a logger.
67		*/
68	73	public function setLogger(LoggerInterface $logger): void
69		{
70	73	$this->logger = $logger;
71	73	$this->orientatedItemFactory->setLogger($logger);
72	73	}
73
74	53	public function setSinglePassMode(bool $singlePassMode): void
75		{
76	53	$this->singlePassMode = $singlePassMode;
77	53	$this->orientatedItemFactory->setSinglePassMode($singlePassMode);
78	53	}
79
80		/**
81		* Pack items into an individual vertical layer.
82		*/
83	73	public function packLayer(ItemList &$items, PackedItemList $packedItemList, array $layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): PackedLayer
84		{
85	73	$layer = new PackedLayer();
86	73	$prevItem = null;
87	73	$x = $y = $rowLength = 0;
88	73	$skippedItems = [];
89	73	$remainingWeightAllowed = $this->getRemainingWeightAllowed($layers);
90
91	73	while ($items->count() > 0) {
92	73	$itemToPack = $items->extract();
93
94		//skip items that will never fit e.g. too heavy
95	73	if (!$this->checkNonDimensionalConstraints($itemToPack, $remainingWeightAllowed, $packedItemList)) {
96	9	continue;
97		}
98
99	73	$orientatedItem = $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevItem, $items, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z, $packedItemList);
100
101	73	if ($orientatedItem instanceof OrientatedItem) {
102	73	$packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
103	73	$layer->insert($packedItem);
104	73	$remainingWeightAllowed -= $itemToPack->getWeight();
105	73	$packedItemList->insert($packedItem);
106
107	73	$rowLength = max($rowLength, $packedItem->getLength());
108
109		//Figure out if we can stack the next item vertically on top of this rather than side by side
110		//e.g. when we've packed a tall item, and have just put a shorter one next to it.
111	73	$this->packVerticallyInsideItemFootprint($layer, $packedItem, $packedItemList, $items, $remainingWeightAllowed, $guidelineLayerDepth, $rowLength, $x, $y, $z);
112	73	$x += $packedItem->getWidth();
113
114	73	$prevItem = $orientatedItem;
115	73	if ($items->count() === 0) {
116	68	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
117	68	$skippedItems = [];
118		}
119	73	continue;
120		}
121
122	65	if ($items->count() > 0) { // skip for now, move on to the next item
123	53	$this->logger->debug("doesn't fit, skipping for now");
124	53	$skippedItems[] = $itemToPack;
125		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
126	53	while ($items->count() > 1 && static::isSameDimensions($itemToPack, $items->top())) {
127	24	$skippedItems[] = $items->extract();
128		}
129	53	continue;
130		}
131
132	65	if ($x > 0) {
133	64	$this->logger->debug('No more fit in width wise, resetting for new row');
134	64	$lengthLeft -= $rowLength;
135	64	$y += $rowLength;
136	64	$x = $rowLength = 0;
137	64	$skippedItems[] = $itemToPack;
138	64	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
139	64	$skippedItems = [];
140	64	$prevItem = null;
141	64	continue;
142		}
143
144	54	$this->logger->debug('no items fit, so starting next vertical layer');
145	54	$skippedItems[] = $itemToPack;
146
147	54	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
148
149	54	return $layer;
150		}
151
152	71	return $layer;
153		}
154
155	73	private function packVerticallyInsideItemFootprint(PackedLayer $layer, PackedItem $packedItem, PackedItemList $packedItemList, ItemList &$items, int &$remainingWeightAllowed, int $guidelineLayerDepth, int $rowLength, int $x, int $y, int $z): void
156		{
157	73	$stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $packedItem->getDepth();
158	73	$stackedZ = $z + $packedItem->getDepth();
159	73	$stackSkippedItems = [];
160	73	$stackedItem = $packedItem->toOrientatedItem();
161	73	while ($stackableDepth > 0 && $items->count() > 0) {
162	19	$itemToTryStacking = $items->extract();
163
164		//skip items that will never fit
165	19	if (!$this->checkNonDimensionalConstraints($itemToTryStacking, $remainingWeightAllowed, $packedItemList)) {
166		continue;
167		}
168
169	19	$stackedItem = $this->orientatedItemFactory->getBestOrientation($itemToTryStacking, $stackedItem, $items, $packedItem->getWidth(), $packedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ, $packedItemList);
170	19	if ($stackedItem) {
171	13	$packedStackedItem = PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ);
172	13	$layer->insert($packedStackedItem);
173	13	$remainingWeightAllowed -= $itemToTryStacking->getWeight();
174	13	$packedItemList->insert($packedStackedItem);
175	13	$stackableDepth -= $stackedItem->getDepth();
176	13	$stackedZ += $stackedItem->getDepth();
177	13	continue;
178		}
179
180	13	$stackSkippedItems[] = $itemToTryStacking;
181		// abandon here if next item is the same, no point trying to keep going
182	13	while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
183	8	$stackSkippedItems[] = $items->extract();
184		}
185		}
186	73	$items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
187	73	}
188
189		/**
190		* As well as purely dimensional constraints, there are other constraints that need to be met
191		* e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
192		*/
193	73	private function checkNonDimensionalConstraints(Item $itemToPack, int $remainingWeightAllowed, PackedItemList $packedItemList): bool
194		{
195	73	$customConstraintsOK = true;
196	73	if ($itemToPack instanceof ConstrainedItem && !$this->box instanceof WorkingVolume) {
197	1	$customConstraintsOK = $itemToPack->canBePackedInBox($packedItemList, $this->box);
198		}
199
200	73	return $customConstraintsOK && $itemToPack->getWeight() <= $remainingWeightAllowed;
201		}
202
203	73	private function getRemainingWeightAllowed(array $layers): int
204		{
205	73	$remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
206	73	foreach ($layers as $layer) {
207	53	$remainingWeightAllowed -= $layer->getWeight();
208		}
209
210	73	return $remainingWeightAllowed;
211		}
212
213		/**
214		* Compare two items to see if they have same dimensions.
215		*/
216	33	private static function isSameDimensions(Item $itemA, Item $itemB): bool
217		{
218	33	if ($itemA === $itemB) {
219	22	return true;
220		}
221	15	$itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
222	15	$itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
223	15	sort($itemADimensions);
224	15	sort($itemBDimensions);
225
226	15	return $itemADimensions === $itemBDimensions;
227		}
228		}
229

dvdoug / BoxPacker

Push — 3.x ( 922c95...5b6501 )

LayerPacker::checkNonDimensionalConstraints() A

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