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<?php declare(strict_types=1); |
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namespace Sunfox\PriceCalculator; |
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use Nette\SmartObject; |
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/** |
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* @property float $basePrice |
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* @property IDiscount|NULL $discount |
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* @property float $price |
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* @property float $vatRate |
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* @property float $priceVat |
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* @property int $decimalPoints |
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*/ |
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final class PriceCalculator implements IPriceCalculator |
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{ |
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use SmartObject; |
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protected float $basePrice = 0.0; |
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protected ?IDiscount $discount = null; |
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protected float $price = 0.0; |
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protected float $vatRate = 0.0; |
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protected float $priceVat = 0.0; |
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protected int $decimalPoints = 2; |
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protected string $calculateFrom = self::FROM_BASEPRICE; |
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public function __construct(float $vatRate = 0.0, float $basePrice = 0.0, ?IDiscount $discount = NULL) |
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{ |
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$this->setVatRate($vatRate); |
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$this->setBasePrice($basePrice); |
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$this->setDiscount($discount); |
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} |
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/** |
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* Get price without VAT and discount. |
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*/ |
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public function getBasePrice(): float |
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{ |
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return $this->basePrice; |
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} |
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/** |
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* Set price without VAT and discount. |
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*/ |
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public function setBasePrice(float $value): IPriceCalculator |
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{ |
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$this->basePrice = $value; |
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$this->calculateFrom = self::FROM_BASEPRICE; |
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return $this; |
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} |
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/** |
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* Get discount in percent without VAT. |
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*/ |
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public function getDiscount(): ?IDiscount |
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{ |
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return $this->discount; |
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} |
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/** |
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* Set discount instance. |
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*/ |
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public function setDiscount(?IDiscount $discount): IPriceCalculator |
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{ |
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$this->discount = $discount; |
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return $this; |
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} |
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/** |
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* Set amount discount. |
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*/ |
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public function setAmountDiscount(float $value): IPriceCalculator |
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{ |
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$this->discount = new Discount\AmountDiscount($value); |
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return $this; |
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} |
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/** |
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* Set percent discount. |
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*/ |
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public function setPercentDiscount(float $value): IPriceCalculator |
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{ |
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$this->discount = new Discount\PercentDiscount($value); |
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return $this; |
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} |
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/** |
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* Get price after discount without VAT. |
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*/ |
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public function getPrice(): float |
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{ |
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return $this->price; |
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} |
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/** |
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* Set price after discount without VAT. |
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*/ |
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public function setPrice(float $value): IPriceCalculator |
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{ |
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$this->price = $value; |
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$this->calculateFrom = self::FROM_PRICE; |
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return $this; |
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} |
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/** |
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* Get VAT rate in percent. |
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*/ |
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public function getVatRate(): float |
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{ |
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return $this->vatRate; |
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} |
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/** |
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* Set VAT rate in percent. |
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*/ |
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public function setVatRate(float $value): IPriceCalculator |
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{ |
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$this->vatRate = $value; |
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return $this; |
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} |
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/** |
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* Get price after discount with VAT. |
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*/ |
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public function getPriceVat(): float |
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{ |
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return $this->priceVat; |
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} |
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/** |
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* Set price after discount with VAT. |
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*/ |
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public function setPriceVat(float $value): IPriceCalculator |
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{ |
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$this->priceVat = $value; |
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$this->calculateFrom = self::FROM_PRICEVAT; |
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return $this; |
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} |
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/** |
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* Get decimal point for rounding. |
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*/ |
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public function getDecimalPoints(): int |
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{ |
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return $this->decimalPoints; |
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} |
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/** |
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* Set decimal point for rounding. |
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*/ |
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public function setDecimalPoints(int $value): IPriceCalculator |
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{ |
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$this->decimalPoints = $value; |
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return $this; |
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} |
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/** |
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* Calculate prices and return result. |
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*/ |
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public function calculate(): PriceCalculatorResult |
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{ |
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if ($this->calculateFrom === self::FROM_BASEPRICE) { |
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[$basePrice, $price, $priceVat] = $this->calculateFromBasePrice(); |
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} elseif ($this->calculateFrom === self::FROM_PRICE) { |
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[$basePrice, $price, $priceVat] = $this->calculateFromPrice(); |
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} elseif ($this->calculateFrom === self::FROM_PRICEVAT) { |
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[$basePrice, $price, $priceVat] = $this->calculateFromPriceVat(); |
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} |
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return new PriceCalculatorResult( |
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$this, $basePrice, $this->discount, $price, $this->vatRate, $priceVat - $price, $priceVat |
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); |
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} |
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/** |
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* @return float[] |
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*/ |
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private function calculateFromBasePrice(): array |
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{ |
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$basePrice = $this->round($this->basePrice); |
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$price = $this->round($this->discount ? $this->discount->addDiscount($basePrice) : $basePrice); |
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$priceVat = $this->round($price * ($this->vatRate / 100 + 1)); |
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return [$basePrice, $price, $priceVat]; |
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} |
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/** |
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* @return float[] |
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*/ |
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private function calculateFromPrice(): array |
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{ |
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$price = $this->round($this->price); |
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$basePrice = $this->discount ? $this->round($this->discount->removeDiscount($price)) : $price; |
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$priceVat = $this->round($price * ($this->vatRate / 100 + 1)); |
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return [$basePrice, $price, $priceVat]; |
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} |
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/** |
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* @return float[] |
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*/ |
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private function calculateFromPriceVat(): array |
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{ |
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$priceVat = $this->round($this->priceVat); |
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$price = $this->round($priceVat / ($this->vatRate / 100 + 1)); |
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$basePrice = $this->discount ? $this->round($this->discount->removeDiscount($price)) : $price; |
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return [$basePrice, $price, $priceVat]; |
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} |
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private function round(float $price): float |
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{ |
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return round($price, $this->decimalPoints); |
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} |
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} |
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