LayerPacker::packLayer() - Code Metrics - Inspection of "Enable JIT on CI" - dvdoug/BoxPacker - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — test_jit ( 87859e...ab7b5d )

by Doug

created 2020-07-08 23:33 UTC

LayerPacker::packLayer() B

↳ Parent: LayerPacker

Complexity

Conditions	9
Paths	8

Size

Total Lines	70
Code Lines	44

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	45
CRAP Score	9

Importance

Changes	5
Bugs	0	Features	0

Metric	Value
cc	9
eloc	44
c	5
b	0
f	0
nc	8
nop	8
dl	0
loc	70
ccs	45
cts	45
cp	1
crap	9
rs	7.6604

How to fix Long Method Many Parameters

<?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 (!$this->checkNonDimensionalConstraints($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 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	58	public function __construct(Box $box)
54		{
55	58	$this->box = $box;
56	58	$this->logger = new NullLogger();
57
58	58	$this->orientatedItemFactory = new OrientatedItemFactory($this->box);
59	58	$this->orientatedItemFactory->setLogger($this->logger);
60	58	}
61
62		/**
63		* Sets a logger.
64		*/
65	58	public function setLogger(LoggerInterface $logger): void
66		{
67	58	$this->logger = $logger;
68	58	$this->orientatedItemFactory->setLogger($logger);
69	58	}
70
71	53	public function setSinglePassMode(bool $singlePassMode): void
72		{
73	53	$this->singlePassMode = $singlePassMode;
74	53	$this->orientatedItemFactory->setSinglePassMode($singlePassMode);
75	53	}
76
77		/**
78		* Pack items into an individual vertical layer.
79		*/
80	58	public function packLayer(ItemList &$items, PackedItemList $packedItemList, array $layers, int $z, int $layerWidth, int $lengthLeft, int $depthLeft, int $guidelineLayerDepth): PackedLayer
81		{
82	58	$layer = new PackedLayer();
83	58	$prevItem = null;
84	58	$x = $y = $rowLength = 0;
85	58	$skippedItems = [];
86	58	$remainingWeightAllowed = $this->getRemainingWeightAllowed($layers);
87
88	58	while ($items->count() > 0) {
89	58	$itemToPack = $items->extract();
90
91		//skip items that will never fit e.g. too heavy
92	58	if (!$this->checkNonDimensionalConstraints($itemToPack, $remainingWeightAllowed, $packedItemList)) {
93	9	continue;
94		}
95
96	58	$orientatedItem = $this->orientatedItemFactory->getBestOrientation($itemToPack, $prevItem, $items, $layerWidth - $x, $lengthLeft, $depthLeft, $rowLength, $x, $y, $z, $packedItemList);
97
98	58	if ($orientatedItem instanceof OrientatedItem) {
99	58	$packedItem = PackedItem::fromOrientatedItem($orientatedItem, $x, $y, $z);
100	58	$layer->insert($packedItem);
101	58	$remainingWeightAllowed -= $itemToPack->getWeight();
102	58	$packedItemList->insert($packedItem);
103
104	58	$rowLength = max($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	58	$this->packVerticallyInsideItemFootprint($layer, $packedItem, $packedItemList, $items, $remainingWeightAllowed, $guidelineLayerDepth, $rowLength, $x, $y, $z);
109	58	$x += $packedItem->getWidth();
110
111	58	$prevItem = $orientatedItem;
112	58	if ($items->count() === 0) {
113	55	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
114	55	$skippedItems = [];
115		}
116	58	continue;
117		}
118
119	52	if ($items->count() > 0) { // skip for now, move on to the next item
120	43	$this->logger->debug("doesn't fit, skipping for now");
121	43	$skippedItems[] = $itemToPack;
122		// abandon here if next item is the same, no point trying to keep going. Last time is not skipped, need that to trigger appropriate reset logic
123	43	while ($items->count() > 1 && static::isSameDimensions($itemToPack, $items->top())) {
124	25	$skippedItems[] = $items->extract();
125		}
126	43	continue;
127		}
128
129	52	if ($x > 0) {
130	51	$this->logger->debug('No more fit in width wise, resetting for new row');
131	51	$lengthLeft -= $rowLength;
132	51	$y += $rowLength;
133	51	$x = $rowLength = 0;
134	51	$skippedItems[] = $itemToPack;
135	51	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
136	51	$skippedItems = [];
137	51	$prevItem = null;
138	51	continue;
139		}
140
141	47	$this->logger->debug('no items fit, so starting next vertical layer');
142	47	$skippedItems[] = $itemToPack;
143
144	47	$items = ItemList::fromArray(array_merge($skippedItems, iterator_to_array($items)), true);
145
146	47	return $layer;
147		}
148
149	57	return $layer;
150		}
151
152	58	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	58	$stackableDepth = ($guidelineLayerDepth ?: $layer->getDepth()) - $packedItem->getDepth();
155	58	$stackedZ = $z + $packedItem->getDepth();
156	58	$stackSkippedItems = [];
157	58	$stackedItem = $packedItem->toOrientatedItem();
158	58	while ($stackableDepth > 0 && $items->count() > 0) {
159	19	$itemToTryStacking = $items->extract();
160
161		//skip items that will never fit
162	19	if (!$this->checkNonDimensionalConstraints($itemToTryStacking, $remainingWeightAllowed, $packedItemList)) {
163	2	continue;
164		}
165
166	19	$stackedItem = $this->orientatedItemFactory->getBestOrientation($itemToTryStacking, $stackedItem, $items, $packedItem->getWidth(), $packedItem->getLength(), $stackableDepth, $rowLength, $x, $y, $stackedZ, $packedItemList);
167	19	if ($stackedItem) {
168	13	$packedStackedItem = PackedItem::fromOrientatedItem($stackedItem, $x, $y, $stackedZ);
169	13	$layer->insert($packedStackedItem);
170	13	$remainingWeightAllowed -= $itemToTryStacking->getWeight();
171	13	$packedItemList->insert($packedStackedItem);
172	13	$stackableDepth -= $stackedItem->getDepth();
173	13	$stackedZ += $stackedItem->getDepth();
174	13	continue;
175		}
176
177	15	$stackSkippedItems[] = $itemToTryStacking;
178		// abandon here if next item is the same, no point trying to keep going
179	15	while ($items->count() > 0 && static::isSameDimensions($itemToTryStacking, $items->top())) {
180	11	$stackSkippedItems[] = $items->extract();
181		}
182		}
183	58	$items = ItemList::fromArray(array_merge($stackSkippedItems, iterator_to_array($items)), true);
184	58	}
185
186		/**
187		* As well as purely dimensional constraints, there are other constraints that need to be met
188		* e.g. weight limits or item-specific restrictions (e.g. max <x> batteries per box).
189		*/
190	58	private function checkNonDimensionalConstraints(Item $itemToPack, int $remainingWeightAllowed, PackedItemList $packedItemList): bool
191		{
192	58	$customConstraintsOK = true;
193	58	if ($itemToPack instanceof ConstrainedItem && !$this->box instanceof WorkingVolume) {
194	1	$customConstraintsOK = $itemToPack->canBePackedInBox($packedItemList, $this->box);
195		}
196
197	58	return $customConstraintsOK && $itemToPack->getWeight() <= $remainingWeightAllowed;
198		}
199
200	58	private function getRemainingWeightAllowed(array $layers): int
201		{
202	58	$remainingWeightAllowed = $this->box->getMaxWeight() - $this->box->getEmptyWeight();
203	58	foreach ($layers as $layer) {
204	46	$remainingWeightAllowed -= $layer->getWeight();
205		}
206
207	58	return $remainingWeightAllowed;
208		}
209
210		/**
211		* Compare two items to see if they have same dimensions.
212		*/
213	32	private static function isSameDimensions(Item $itemA, Item $itemB): bool
214		{
215	32	if ($itemA === $itemB) {
216	22	return true;
217		}
218	15	$itemADimensions = [$itemA->getWidth(), $itemA->getLength(), $itemA->getDepth()];
219	15	$itemBDimensions = [$itemB->getWidth(), $itemB->getLength(), $itemB->getDepth()];
220	15	sort($itemADimensions);
221	15	sort($itemBDimensions);
222
223	15	return $itemADimensions === $itemBDimensions;
224		}
225		}
226

dvdoug / BoxPacker

Push — test_jit ( 87859e...ab7b5d )

LayerPacker::packLayer() B

Complexity

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Duplication

Code Coverage

Importance

How to fix Long Method Many Parameters

Long Method

Many Parameters

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