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<?php |
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namespace BillingBoss\Interpreter; |
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use BillingBoss\Exception\RangeException; |
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use BillingBoss\Expr; |
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use BillingBoss\BillContext; |
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use BillingBoss\AbstractBillInterpreter; |
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use BillingBoss\RangeHelper; |
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use BillingBoss\Traits\RangeValidityCheck; |
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/** |
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* Flat rate bill interpreter |
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* |
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* @package BillingBoss |
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* @link https://github.com/ranskills/billing-boss-php |
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* @copyright Copyright (c) 2018 Ransford Ako Okpoti |
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* @license Refer to the LICENSE distributed with this library |
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* @since 1.0.0 |
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*/ |
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final class FlatRateBillInterpreter extends AbstractBillInterpreter |
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{ |
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use RangeValidityCheck; |
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private const EXPRESSION = Expr::POSITIVE_NUMBER . |
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Expr::COMMA . |
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Expr::RANGE; |
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public function __construct() |
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{ |
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parent::__construct(sprintf('/^(%1$s)(%2$s%1$s)*$/', self::EXPRESSION, Expr::PIPE)); |
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} |
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/** |
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* @param BillContext $context |
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* @return float |
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* @throws RangeException |
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*/ |
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public function interpret(BillContext $context): float |
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{ |
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if (!$this->isValid($context)) { |
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return 0; |
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} |
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$bill = 0.0; |
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$parts = preg_split(sprintf('/%s/', Expr::PIPE), $context->getStructure()); |
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$len = $parts === false ? 0 : count($parts); |
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for ($i = 0; $i < $len; $i++) { |
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$range = $this->ranges[$i]; |
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$matches = []; |
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\preg_match(sprintf('/^%s$/', self::EXPRESSION), $parts[$i], $matches); |
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$amount = $context->getAmount(); |
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if (RangeHelper::isInRange($range, $amount)) { |
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$bill = $matches[1]; |
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break; |
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} |
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} |
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return $bill; |
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} |
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} |
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ranskills /
billing-boss-php
