first commit

衣莎项目/源码/YiShaXiYi/model/shopCart.js

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+const app = getApp();
+const regeneratorRuntime = app.loadAsync()
+const { StorageSync } = require("./getSetting")
+const util = app.loadUtils("util")
+const { Msg } = require("../model/message")
+const msg = new Msg()
+
+export class ShopCart extends StorageSync {
+    constructor() {
+        super()
+    }
+    /**
+     * 获取本地购物车缓存如果没有数据返回空数组
+     */
+    async getCart() {
+        let that = this
+        let shopCart = await that.getSetting("shopCart")
+        if (typeof shopCart === 'undefined') {
+            await this.setStorage("shopCart", [])
+            return await []
+        }
+        return await shopCart
+    }
+    /**
+     * 
+     * @param { Object } data 放到购物中的数据
+     */
+    async setCart(data) {
+        let getCart = await this.getCart()
+        if (data.num <= 0) {
+            data.num = ++data.num
+        }
+        if (getCart.length <= 0) {
+            getCart.push(data)
+        } else {
+            for (let i = 0; i < getCart.length; i++) {
+                if (util.Compare(getCart[i], data, "num")) {
+                    getCart[i].num += data.num
+                    break;
+                }
+                if (getCart.length - 1 == i) {
+                    getCart.push(data)
+                    break;
+                }
+            }
+        }
+        this.setStorage("shopCart", getCart)
+        // 更新角标
+        app.globalData.cartNum = getCart.length
+        wx.showToast({
+            title: '添加成功,在购物车等亲~',
+            icon: 'none',
+            duration: 800
+        })
+    }
+    /**
+     * 
+     * @param { Object } data 已经更新过的数据
+     */
+    async updateCart(data) {
+        let that = this
+        let getCart = await this.getCart()
+        for (let i = 0; i < getCart.length; i++) {
+            if (util.Compare(getCart[i], data, "num")) {
+                if (data.num == 0) {
+                    getCart.splice(i, 1)
+                    break;
+                }
+                getCart[i].num = data.num
+                break;
+            }
+        }
+        return new Promise((resolve, reject) => {
+            if (data.num == 0) {
+                wx.showModal({
+                    title: '删除该商品',
+                    content: '点击确定删除',
+                    confirmText: "确认",
+                    cancelText: "取消",
+                    async success(res) {
+                        if (res.confirm) {
+                            that.setStorage("shopCart", getCart)
+                            // 更新角标
+                            app.globalData.cartNum = getCart.length
+                            resolve(getCart)
+                        }
+                    }
+                })
+            } else {
+                this.setStorage("shopCart", getCart)
+                // 更新角标
+                app.globalData.cartNum = getCart.length
+                resolve(getCart)
+            }
+        })
+    }
+    /**
+     * 
+     */
+    async getCartMon() {
+        let cart = await this.getCart()
+        let totalprice = 0
+        cart.map((v, i) => {
+            totalprice += v.num * v.price
+        })
+        return totalprice
+    }
+    /**
+     * 购物车删除商品
+     *  @param { Object } data 需要删除的商品id
+     */
+    async deleteCart(data) {
+        let getCart = await this.getCart()
+        let newCart = []
+        let newData = data.allCart
+        newData.map((v, i) => {
+            if (typeof v.isShow == 'boolean') {
+                delete newData[i].isShow
+            }
+        })
+        getCart.map((v, i) => {
+            let n = newData.filter(n => {
+                return util.Compare(v, n, "num")
+            })
+            if (n.length <= 0) {
+                newCart.push(v)
+            }
+        })
+        this.setStorage("shopCart", newCart)
+        // 更新角标
+        app.globalData.cartNum = newCart.length
+    }
+}