初始化项目

server-tp6/app/api/service/points/GoodsDeduct.php

@@ -0,0 +1,104 @@
+<?php
+// +----------------------------------------------------------------------
+// | 萤火商城系统 [ 致力于通过产品和服务，帮助商家高效化开拓市场 ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2017~2023 https://www.yiovo.com All rights reserved.
+// +----------------------------------------------------------------------
+// | Licensed 这不是一个自由软件，不允许对程序代码以任何形式任何目的的再发行
+// +----------------------------------------------------------------------
+// | Author: 萤火科技 <admin@yiovo.com>
+// +----------------------------------------------------------------------
+declare (strict_types=1);
+
+namespace app\api\service\points;
+
+use app\common\library\helper;
+use app\api\model\Setting as SettingModel;
+use app\common\service\BaseService;
+
+/**
+ * 订单积分抵扣服务类
+ * Class GoodsDeduct
+ * @package app\api\service\points
+ */
+class GoodsDeduct extends BaseService
+{
+    private $goodsList;
+
+    /**
+     * 构造方法
+     * GoodsDeduct constructor.
+     * @param $goodsList
+     */
+    public function __construct($goodsList)
+    {
+        parent::__construct();
+        $this->goodsList = $goodsList;
+    }
+
+    public function setGoodsPoints($maxPointsNumCount, $actualPointsNum)
+    {
+        // 计算实际积分抵扣数量
+        $this->setGoodsListPointsNum($maxPointsNumCount, $actualPointsNum);
+        // 总抵扣数量
+        $totalPointsNum = (int)helper::getArrayColumnSum($this->goodsList, 'points_num');
+        // 填充余数
+        $this->setGoodsListPointsNumFill($actualPointsNum, $totalPointsNum);
+        $this->setGoodsListPointsNumDiff($actualPointsNum, $totalPointsNum);
+        // 计算实际积分抵扣金额
+        $this->setGoodsListPointsMoney();
+        return true;
+    }
+
+    /**
+     * 计算实际积分抵扣数量
+     * @param $maxPointsNumCount
+     * @param $actualPointsNum
+     */
+    private function setGoodsListPointsNum($maxPointsNumCount, $actualPointsNum)
+    {
+        foreach ($this->goodsList as &$goods) {
+            if (!$goods['is_points_discount']) continue;
+            $goods['points_num'] = floor($goods['max_points_num'] / $maxPointsNumCount * $actualPointsNum);
+        }
+    }
+
+    /**
+     * 计算实际积分抵扣金额
+     */
+    private function setGoodsListPointsMoney()
+    {
+        $setting = SettingModel::getItem('points');
+        foreach ($this->goodsList as &$goods) {
+            if (!$goods['is_points_discount']) continue;
+            $goods['points_money'] = helper::bcmul($goods['points_num'], $setting['discount']['discount_ratio']);
+        }
+    }
+
+    private function setGoodsListPointsNumFill($actualPointsNum, $totalPointsNum)
+    {
+        if ($totalPointsNum === 0) {
+            $temReducedMoney = $actualPointsNum;
+            foreach ($this->goodsList as &$goods) {
+                if (!$goods['is_points_discount']) continue;
+                if ($temReducedMoney === 0) break;
+                $goods['points_num'] = 1;
+                $temReducedMoney--;
+            }
+        }
+        return true;
+    }
+
+    private function setGoodsListPointsNumDiff($actualPointsNum, $totalPointsNum)
+    {
+        $tempDiff = $actualPointsNum - $totalPointsNum;
+        foreach ($this->goodsList as &$goods) {
+            if (!$goods['is_points_discount']) continue;
+            if ($tempDiff < 1) break;
+            $goods['points_num'] = $goods['points_num'] + 1;
+            $tempDiff--;
+        }
+        return true;
+    }
+
+}