78 lines
2.0 KiB
PHP
78 lines
2.0 KiB
PHP
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<?php
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namespace app\service\order;
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use app\exception\ServiceException;
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use app\service\Math;
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use think\facade\Config as CConfig;
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class Compute
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{
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/**
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* 分销配置
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*
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* @return array
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*/
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public static function configSales(): array
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{
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CConfig::load('extra/sales', 'sales');
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return config('sales') ?? [];
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}
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/**
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* 查询积分抵扣金额
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*
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* @param int $score
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* @return float
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* @throws \app\exception\ServiceException
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*/
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public static function score2price(int $score): float
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{
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list($rateScore, $ratePrice) = self::checkScoreDeduct();
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return (Math::mul($score, Math::div($ratePrice, $rateScore)));
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}
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/**
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* 查询金额需要多少积分
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*
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* @param float $price
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* @return int 积分必须为正整数，因此向上取整
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* @throws \app\exception\ServiceException
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*/
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public static function price2score(float $price): int
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{
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list($rateScore, $ratePrice) = self::checkScoreDeduct();
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$score = (Math::mul($price, Math::div($rateScore, $ratePrice)));
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return ceil($score);
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}
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/**
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* 返回积分抵扣配置值
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*
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* @return int[]
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* @throws \app\exception\ServiceException
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*/
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public static function checkScoreDeduct(): array
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{
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$config = self::configSales();
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$rate = $config['score_deduct_price'] ?? '10:1';//默认是积分:金额 10:1
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$rateArr = explode(':', $rate);
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if (count($rateArr) !== 2) {
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throw new ServiceException('积分兑换比例配置错误');
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}
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$rateScore = (int) $rateArr[0];
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$ratePrice = (int) $rateArr[1];
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if ($rateScore <= 0 || $ratePrice <= 0) {
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throw new ServiceException('积分兑换比例配置值必须大于零');
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}
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if (!is_int($rateScore) || $rateScore <= 0) {
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throw new ServiceException('积分兑换比例配置中积分必须是正整数');
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}
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return [$rateScore, $ratePrice];
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}
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}
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