定金

src/components/order/deposit/final-order/index.js

@@ -340,7 +340,8 @@ class FinalDepositOrder extends Component {
       } else {
         selectedCourses.splice(index, 1)
       }
-            return {selectedCourses, salePrice: this.getTotalPrice(selectedCourses)}
+      let totalPrice = this.getTotalPrice(selectedCourses)
+      return {selectedCourses, salePrice: totalPrice, offset: this.getBalanceOffset(totalPrice)}
     })
   }
 
@@ -352,10 +353,7 @@ class FinalDepositOrder extends Component {
       moneyOffRules = this.state.moneyOffRules
     } = {}
   ) => {
-        let totalPrice = 0
-        totalPrice += courses.reduce((accu, item) => {
-            return accu + parseFloat(item['sale_price'])
-        }, 0)
+    let totalPrice = this.getOriginTotalPrice()
     totalPrice = this.moneyOff(totalPrice, moneyOffRules)
     if (useBalance) {
       totalPrice -= parseFloat(this.state.user_account)
@@ -363,6 +361,7 @@ class FinalDepositOrder extends Component {
     return totalPrice < 0 ? 0 : totalPrice.toFixed(2)
   }
 
+  //满减计算
   moneyOff = (totalPrice, moneyOffRules = this.state.moneyOffRules) => {
     let rules = moneyOffRules.sort((a, b) => b.full_amount - a.full_amount)
     let result = parseFloat(totalPrice)
@@ -382,17 +381,30 @@ class FinalDepositOrder extends Component {
   useBalance = () => {
     this.setState(prevState => {
       const useBalance = !prevState.useBalance
-            let offset = parseFloat(this.state.user_account) - parseFloat(this.getTotalPrice())
-            offset = offset > 0 ? this.getTotalPrice() : this.state.user_account
+      let totalPrice = this.getTotalPrice({useBalance})
       return {
         useBalance,
-                salePrice: this.getTotalPrice({useBalance}),
-                offset
+        salePrice: totalPrice,
+        offset: this.getBalanceOffset(totalPrice)
       }
     })
 
   }
 
+  getOriginTotalPrice = ({courses = this.state.selectedCourses} = {}) => {
+      return courses.reduce((accu, item) => {
+          return accu + parseFloat(item['sale_price'])
+      }, 0)
+
+  }
+
+  getBalanceOffset = () => {
+      let originalTotalPrice = this.getOriginTotalPrice()
+    let offset = parseFloat(this.state.user_account) - parseFloat(originalTotalPrice)
+    offset = offset >= 0 ? originalTotalPrice : this.state.user_account
+    return offset
+  }
+
   render() {
     const {
       orderId,