Complex classes like ProductVariant often do a lot of different things. To break such a class down, we need to identify a cohesive component within that class. A common approach to find such a component is to look for fields/methods that share the same prefixes, or suffixes. You can also have a look at the cohesion graph to spot any un-connected, or weakly-connected components.
Once you have determined the fields that belong together, you can apply the Extract Class refactoring. If the component makes sense as a sub-class, Extract Subclass is also a candidate, and is often faster.
While breaking up the class, it is a good idea to analyze how other classes use ProductVariant, and based on these observations, apply Extract Interface, too.
| 1 | <?php | ||
| 23 | class ProductVariant extends BaseVariant implements ProductVariantInterface, Comparable | ||
| 24 | { | ||
| 25 | /** @var int */ | ||
| 26 | protected $version = 1; | ||
| 27 | |||
| 28 | /** @var int */ | ||
| 29 | protected $onHold = 0; | ||
| 30 | |||
| 31 | /** @var int */ | ||
| 32 | protected $onHand = 0; | ||
| 33 | |||
| 34 | /** @var bool */ | ||
| 35 | protected $tracked = false; | ||
| 36 | |||
| 37 | /** @var float */ | ||
| 38 | protected $weight; | ||
| 39 | |||
| 40 | /** @var float */ | ||
| 41 | protected $width; | ||
| 42 | |||
| 43 | /** @var float */ | ||
| 44 | protected $height; | ||
| 45 | |||
| 46 | /** @var float */ | ||
| 47 | protected $depth; | ||
| 48 | |||
| 49 | /** @var TaxCategoryInterface */ | ||
| 50 | protected $taxCategory; | ||
| 51 | |||
| 52 | /** @var ShippingCategoryInterface */ | ||
| 53 | protected $shippingCategory; | ||
| 54 | |||
| 55 | /** @var Collection */ | ||
| 56 | protected $channelPricings; | ||
| 57 | |||
| 58 | /** @var bool */ | ||
| 59 | protected $shippingRequired = true; | ||
| 60 | |||
| 61 | /** | ||
| 62 | * @var Collection|ProductImageInterface[] | ||
| 63 | * | ||
| 64 | * @psalm-var Collection<array-key, ProductImageInterface> | ||
| 65 | */ | ||
| 66 | protected $images; | ||
| 67 | |||
| 68 | public function __construct() | ||
| 78 | |||
| 79 | public function __toString(): string | ||
| 95 | |||
| 96 | public function getVersion(): ?int | ||
| 100 | |||
| 101 | public function setVersion(?int $version): void | ||
| 105 | |||
| 106 | public function isInStock(): bool | ||
| 110 | |||
| 111 | public function getOnHold(): ?int | ||
| 115 | |||
| 116 | public function setOnHold(?int $onHold): void | ||
| 120 | |||
| 121 | public function getOnHand(): ?int | ||
| 125 | |||
| 126 | public function setOnHand(?int $onHand): void | ||
| 130 | |||
| 131 | public function isTracked(): bool | ||
| 135 | |||
| 136 | public function setTracked(bool $tracked): void | ||
| 140 | |||
| 141 | public function getInventoryName(): ?string | ||
| 145 | |||
| 146 | public function getShippingCategory(): ?ShippingCategoryInterface | ||
| 150 | |||
| 151 | public function setShippingCategory(?ShippingCategoryInterface $category): void | ||
| 155 | |||
| 156 | public function getWeight(): ?float | ||
| 160 | |||
| 161 | public function setWeight(?float $weight): void | ||
| 165 | |||
| 166 | public function getWidth(): ?float | ||
| 170 | |||
| 171 | public function setWidth(?float $width): void | ||
| 175 | |||
| 176 | public function getHeight(): ?float | ||
| 180 | |||
| 181 | public function setHeight(?float $height): void | ||
| 185 | |||
| 186 | public function getDepth(): ?float | ||
| 190 | |||
| 191 | public function setDepth(?float $depth): void | ||
| 195 | |||
| 196 | public function getShippingWeight(): ?float | ||
| 200 | |||
| 201 | public function getShippingWidth(): ?float | ||
| 205 | |||
| 206 | public function getShippingHeight(): ?float | ||
| 210 | |||
| 211 | public function getShippingDepth(): ?float | ||
| 215 | |||
| 216 | public function getShippingVolume(): ?float | ||
| 220 | |||
| 221 | public function getTaxCategory(): ?TaxCategoryInterface | ||
| 225 | |||
| 226 | public function setTaxCategory(?TaxCategoryInterface $category): void | ||
| 230 | |||
| 231 | public function getChannelPricings(): Collection | ||
| 235 | |||
| 236 | public function getChannelPricingForChannel(ChannelInterface $channel): ?ChannelPricingInterface | ||
| 244 | |||
| 245 | public function hasChannelPricingForChannel(ChannelInterface $channel): bool | ||
| 249 | |||
| 250 | public function hasChannelPricing(ChannelPricingInterface $channelPricing): bool | ||
| 254 | |||
| 255 | public function addChannelPricing(ChannelPricingInterface $channelPricing): void | ||
| 262 | |||
| 263 | public function removeChannelPricing(ChannelPricingInterface $channelPricing): void | ||
| 270 | |||
| 271 | public function isShippingRequired(): bool | ||
| 275 | |||
| 276 | public function setShippingRequired(bool $shippingRequired): void | ||
| 280 | |||
| 281 | /** | ||
| 282 | * @psalm-suppress InvalidReturnType https://github.com/doctrine/collections/pull/220 | ||
| 283 | * @psalm-suppress InvalidReturnStatement https://github.com/doctrine/collections/pull/220 | ||
| 284 | */ | ||
| 285 | public function getImages(): Collection | ||
| 289 | |||
| 290 | /** | ||
| 291 | * @psalm-suppress InvalidReturnType https://github.com/doctrine/collections/pull/220 | ||
| 292 | * @psalm-suppress InvalidReturnStatement https://github.com/doctrine/collections/pull/220 | ||
| 293 | */ | ||
| 294 | public function getImagesByType(string $type): Collection | ||
| 300 | |||
| 301 | public function hasImages(): bool | ||
| 305 | |||
| 306 | public function hasImage(ProductImageInterface $image): bool | ||
| 310 | |||
| 311 | public function addImage(ProductImageInterface $image): void | ||
| 320 | |||
| 321 | public function removeImage(ProductImageInterface $image): void | ||
| 327 | |||
| 328 | /** | ||
| 329 | * @inheritDoc | ||
| 330 | */ | ||
| 331 | public function compareTo($other): int | ||
| 335 | } | ||
| 336 | 
Our type inference engine has found an assignment to a property that is incompatible with the declared type of that property.
Either this assignment is in error or the assigned type should be added to the documentation/type hint for that property..