商城PC端订单结算添加会员积分兑换业务功能

src/api/user/order.js

@@ -122,3 +122,11 @@ export function orderPayCode (params) {
     params
   })
 }
+
+export function queryDict (params) {
+  return request({
+    url: '/dict/getByName',
+    method: 'get',
+    params
+  })
+}

src/views/placeOrder/index.vue

@@ -64,6 +64,13 @@
           />
         </div>
       </div>
+      <div style="display: flex;justify-content: right;align-items: center" v-if="integralShow">
+        <span style="font-size: 15px;margin-right: 5px">可用{{ integralNum }}积分抵扣{{ integralPrice.toFixed(2) }}元</span>
+        <el-checkbox v-model="selectIntegral"
+                     @change='changeIntegral()'
+                     :true-label='1'
+                     :false-label='0'/>
+      </div>
       <div class="payBox">
         <div class="payTit">选择支付方式</div>
         <div class="payList">
@@ -213,7 +220,8 @@ import {
   orderSubmit,
   getSettlement,
   getGroupSettle,
-  checkOrderResult
+  checkOrderResult,
+  queryDict
 } from '@/api/user/order.js'
 import {
   getCartList,
@@ -286,6 +294,12 @@ export default {
       couponShopAmount: 0, // 商家券总折扣
       hasCheck: 0, // 含有不可叠加券： 1.平台券  2.商家券
       disabledButton: false, // 获地址是否符合商家配送范围内
+      selectIntegral: true,
+      integralNum: 0,
+      integralRatio: 0, // 积分兑换比例
+      integralPrice: 0, // 总积分可减多少元
+      orderCreditThreshold: 0, // 满多少元可以抵扣
+      integralShow: false, // 显示隐藏积分
     }
   },
   created () {
@@ -317,6 +331,7 @@ export default {
   mounted () {
     // 获取地址列表
     this.getAddressList()
+    this.queryDict()
     if (this.$route.query.type) {
       this.getSetProList()
     } else {
@@ -858,6 +873,8 @@ export default {
       if (this.checkedPlatformCoupon) {
         this.totalPrice = shopSumPrice - this.couponAmount
       }
+      // 积分支付计算
+      this.calcCredit()
       // 加上每个商家的运费
       this.settlement.shops.forEach((item) => {
         this.totalPrice = this.totalPrice + (item.distribution.distributionPrice || 0)
@@ -893,6 +910,120 @@ export default {
       }
       this.couponAmount = parseFloat(tmpAmount)
     },
+
+    calcCredit () {
+      let shopsLen = this.settlement.shops.length
+      const skuRemainMap = this.calcSkuRemainMap()
+      const skuCreditMap = this.settlement.skuCreditMap;
+      if (skuCreditMap && this.integralRatio > 0) {
+        this.orderCreditThreshold = this.settlement.orderCreditThreshold
+        let remainUserCredit = this.settlement.userTotalCredit
+        let remainTotalPrice = Math.round((this.totalPrice + Number.EPSILON) * 100) / 100
+        let remainDeductLimit = this.settlement.creditDeductLimit
+        // 只有订单金额达到阈值，并且用户还有剩余的积分，才能进行积分抵扣
+        if (this.totalPrice >= this.orderCreditThreshold && remainUserCredit > 0 && remainDeductLimit > 0) {
+          for (let i = 0; i < shopsLen; i++) {
+            const curShop = this.settlement.shops[i]
+            let skuLen = curShop.skus.length
+            for (let j = 0; j < skuLen; j++) {
+              const curSku = curShop.skus[j]
+              const skuId = curSku.skuId
+              if (skuCreditMap[skuId] > 0 && skuRemainMap[skuId] > 0 && remainUserCredit > 0 &&
+                remainTotalPrice > 0) {
+                // 抵扣之后，必须保证整个订单至少还有0.01元，可用于支付
+                if (remainTotalPrice - skuRemainMap[skuId] < 0.01) {
+                  skuRemainMap[skuId] -= 0.01
+                }
+                // 按照比例换算成需要多少积分抵扣(取整)
+                let finalSkuCredit = parseInt((skuRemainMap[skuId] / this.integralRatio).toString());
+                // 优先以商家配置的商品可抵扣积分为准
+                if (skuCreditMap[skuId] < finalSkuCredit) {
+                  finalSkuCredit = skuCreditMap[skuId]
+                }
+                // 不能超过用户剩余积分
+                if (remainUserCredit < finalSkuCredit) {
+                  finalSkuCredit = remainUserCredit
+                }
+                // 不能超过整个订单可抵扣积分
+                if (remainDeductLimit < finalSkuCredit) {
+                  finalSkuCredit = remainDeductLimit
+                }
+                curSku.cachedCredit = finalSkuCredit
+                this.integralNum += finalSkuCredit
+                remainUserCredit -= finalSkuCredit
+                remainDeductLimit -= finalSkuCredit
+                remainTotalPrice -= finalSkuCredit
+              }
+            }
+          }
+        }
+        //计算抵扣价格
+        if (this.integralNum !== 0) {
+          this.integralNum = parseInt(this.integralNum)
+          this.integralPrice = this.integralNum * this.integralRatio
+          if (this.integralNum !== 0) {
+            this.integralShow = true
+          }
+          if (this.selectIntegral) {
+            this.totalPrice = this.totalPrice - this.integralPrice
+          }
+        } else {
+          this.integralShow = false
+        }
+      }
+    },
+
+    /**
+     * 计算sku在整个运单价格中的剩余价值 1元的订单，打1折优惠之后，剩余价值就是0.1元
+     */
+    calcSkuRemainMap () {
+      let skuRemainMap = {}
+      let shopsLen = this.settlement.shops.length
+      const skuCreditMap = this.settlement.skuCreditMap
+      for (let i = 0; i < shopsLen; i++) {
+        const curShop = this.settlement.shops[i]
+        let skuLen = curShop.skus.length
+        let checkedShopCoupon = undefined
+        curShop.shopCoupons.forEach((item) => {
+          if (item.checked) {
+            checkedShopCoupon = item
+          }
+        })
+        for (let j = 0; j < skuLen; j++) {
+          const curSku = curShop.skus[j]
+          const skuId = curSku.skuId
+          // 不是定价捆绑，并且有配置可抵扣的积分，才有必要计算比例
+          if (!curSku.priceId > 0 && skuCreditMap[skuId] > 0) {
+            let remainSkuMoney = curSku.price * curSku.number
+            if (checkedShopCoupon) {
+              let skuShopPercent = remainSkuMoney / curShop.total
+              let curReduceMoney = 0
+              if (checkedShopCoupon.couponType === 1) {
+                curReduceMoney = checkedShopCoupon.reduceMoney * skuShopPercent
+              } else {
+                curReduceMoney = remainSkuMoney * (10 - checkedShopCoupon.reduceMoney) / 10
+              }
+              remainSkuMoney = remainSkuMoney - curReduceMoney
+            }
+            // 使用平台券
+            if (this.checkedPlatformCoupon && remainSkuMoney > 0) {
+              // 满减
+              if (this.checkedPlatformCoupon.couponType === 1) {
+                let skuTotalPercent = remainSkuMoney / this.totalPrice
+                remainSkuMoney -= this.checkedPlatformCoupon.reduceMoney * skuTotalPercent
+              }
+              // 折扣
+              else {
+                remainSkuMoney = remainSkuMoney * this.checkedPlatformCoupon.reduceMoney / 10
+              }
+            }
+            skuRemainMap[skuId] = remainSkuMoney
+          }
+        }
+      }
+      return skuRemainMap
+    },
+
     // 选择支付方式
     selectPay (payType) {
       this.payType = payType
@@ -926,7 +1057,9 @@ export default {
                 sceneId: k.sceneId,
                 useMember: k.useMember,
                 buyerCouponId: k.buyerCouponId,
-                buyerShopCouponId: k.buyerShopCouponId
+                buyerShopCouponId: k.buyerShopCouponId,
+                useCredit: this.selectIntegral && k.cachedCredit ? k.cachedCredit : undefined,
+                useCreditAmount: this.selectIntegral && k.cachedCredit ? (k.cachedCredit * this.integralRatio).toFixed(2) : undefined
               })
             }
           })
@@ -1059,6 +1192,23 @@ export default {
     },
     toOrder () {
       this.$router.push({path: '/myOrder'})
+    },
+
+    // 积分价格计算
+    changeIntegral () {
+      this.selectIntegral = !this.selectIntegral
+      if (this.selectIntegral) {
+        this.totalPrice = this.totalPrice - this.integralPrice
+      } else {
+        this.totalPrice = this.totalPrice + this.integralPrice
+      }
+    },
+
+    async queryDict () {
+      const response = await queryDict({
+        name: 'credit_exchange_rate'
+      })
+      this.integralRatio = parseFloat(response.data.data.dictDescribe)
     }
   }
 }