LayerPacker::checkNonDimensionalConstraints() - Code Metrics - Inspection of "Measure branch and path coverage from the testsuit..." - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

Test Failed

Push — master ( 09012b...794d70 )

by Doug

created 2020-08-07 17:41 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 max;
use Psr\Log\LoggerAwareInterface;
use Psr\Log\LoggerInterface;
use Psr\Log\NullLogger;

/**
 * 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 ($itemToPack->getWeight() > $remainingWeightAllowed) {
                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 ($itemToTryStacking->getWeight() > $remainingWeightAllowed) {
                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);
    }

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

dvdoug / BoxPacker

Push — master ( 09012b...794d70 )

LayerPacker::checkNonDimensionalConstraints() A

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