82 lines
2.5 KiB
PHP
82 lines
2.5 KiB
PHP
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<?php
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namespace app\api\service\points;
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use app\common\library\helper;
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use app\api\model\Setting as SettingModel;
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class GoodsDeduct
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{
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private $goodsList;
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public function __construct($goodsList)
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{
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$this->goodsList = $goodsList;
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}
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public function setGoodsPoints($maxPointsNumCount, $actualPointsNum)
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{
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// 计算实际积分抵扣数量
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$this->setGoodsListPointsNum($maxPointsNumCount, $actualPointsNum);
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// 总抵扣数量
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$totalPointsNum = helper::getArrayColumnSum($this->goodsList, 'points_num');
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// 填充余数
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$this->setGoodsListPointsNumFill($actualPointsNum, $totalPointsNum);
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$this->setGoodsListPointsNumDiff($actualPointsNum, $totalPointsNum);
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// 计算实际积分抵扣金额
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$this->setGoodsListPointsMoney();
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return true;
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}
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/**
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* 计算实际积分抵扣数量
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* @param $maxPointsNumCount
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* @param $actualPointsNum
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*/
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private function setGoodsListPointsNum($maxPointsNumCount, $actualPointsNum)
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{
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foreach ($this->goodsList as &$goods) {
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if (!$goods['is_points_discount']) continue;
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$goods['points_num'] = floor($goods['max_points_num'] / $maxPointsNumCount * $actualPointsNum);
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}
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}
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/**
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* 计算实际积分抵扣金额
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*/
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private function setGoodsListPointsMoney()
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{
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$setting = SettingModel::getItem('points');
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foreach ($this->goodsList as &$goods) {
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if (!$goods['is_points_discount']) continue;
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$goods['points_money'] = helper::bcmul($goods['points_num'], $setting['discount']['discount_ratio']);
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}
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}
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private function setGoodsListPointsNumFill($actualPointsNum, $totalPointsNum)
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{
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if ($totalPointsNum === 0) {
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$temReducedMoney = $actualPointsNum;
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foreach ($this->goodsList as &$goods) {
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if (!$goods['is_points_discount']) continue;
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if ($temReducedMoney === 0) break;
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$goods['points_num'] = 1;
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$temReducedMoney--;
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}
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}
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return true;
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}
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private function setGoodsListPointsNumDiff($actualPointsNum, $totalPointsNum)
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{
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$tempDiff = $actualPointsNum - $totalPointsNum;
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foreach ($this->goodsList as &$goods) {
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if (!$goods['is_points_discount']) continue;
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if ($tempDiff < 1) break;
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$goods['points_num'] = $goods['points_num'] + 1;
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$tempDiff--;
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}
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return true;
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}
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}
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