tree-structure-merging/index.js

```javascript npm i tree-structure-merging ```

let treeDate = {
    // 比较排序
    compare: function (p) {
        return function (m, n) {
            let a = m[p];
            let b = n[p];
            if (a < b) {
                return -1;
            } else if (a > b) {
                return 1;
            } else {
                return 0;
            };
        };
    },
    // 让相同数据合并并且进行排序
    SameTreeData: function (data, element, sortElement = null) {
        let dataInfo = {};
        data.forEach(item => {
            if (!dataInfo[item[element]]) {
                dataInfo[item[element]] = {
                    [`${element}`]: item[element],
                    children: []
                }
            }
            dataInfo[item[element]].children.push(item);
        });
        let list = Object.values(dataInfo);
        if (sortElement != undefined || sortElement != null || sortElement != "") {
            list.sort(this.compare(sortElement));
        };
        return (list);
    }
};
let time = {
    // 获取两个日期之间还有几天
    diffDays: function (date, otherDate) {
        return Math.ceil(Math.abs(date - otherDate) / (1000 * 60 * 60 * 24));
    },
    // 将日期转换成YYYY-MM-DD格式
    formatYmd: function (date) {
        return date.toISOString().slice(0, 10);
    },
    dateChange: function (data, str, format) {
        if (str === null || str === undefined || str.trim() === "") {
            throw Error("Give me an empty character. What do you want me to convert?");
        }
        if (data === null || data === undefined) {
            throw Error(`Converted data cannot be ${Object.prototype.toString.call(data).slice(8,-1)}!`)
        } else if (data === "") {
            throw Error("Data cannot be empty!");
        } else {
            if (Object.prototype.toString.call(data) === "[object Array]") {
                data.map(item => {
                    if (item[str] === undefined) {
                        throw Error(`Cannot find key name ${str}`);
                    }
                    item[str] = this.timeChange(item[str], format);
                    if (item.chiidren) {
                        this.dateChange(item.chiidren, str, format)
                    }
                });
            } else if (Object.prototype.toString.call(data) === "[object Object]") {
                if (data[str] === undefined) {
                    throw Error(`Cannot find key name ${str}`);
                }
                data[str] = this.timeChange(data[str], format);
            } else if (Object.prototype.toString.call(data) === "[object Date]" || Object.prototype.toString.call(data) === "[object String]") {
                format = arguments[1];
                data = this.timeChange(data, format);
            }
            return data;
        };
    },
    timeChange: function (str, format) {
        if (format === null || format === undefined || format.trim() === "") {
            throw Error("If format is empty, what do you use to do?");
        };
        return `${/yyyy/.test(format)?str.getFullYear():''}${/yyyy/.test(format) && /mm/.test(format)?"-":""}${/mm/.test(format)?str.getMonth()+1>=10?str.getMonth()+1:'0'+(str.getMonth()+1):""}${/mm/.test(format) && /dd/.test(format)?"-":""}${/dd/.test(format)?str.getDate()>=10?str.getDate():'0'+str.getDate():""}${/hh/.test(format) || /ff/.test(format) || /ss/.test(format)?" ":""}${/hh/.test(format)?str.getHours()>=10?str.getHours():"0"+str.getHours():""}${/hh/.test(format) && /ff/.test(format)?":":""}${/ff/.test(format)?str.getMinutes()>=10?str.getMinutes():'0'+str.getMinutes():""}${/ff/.test(format) && /ss/.test(format)?":":""}${/ss/.test(format)?str.getSeconds()>=10?str.getSeconds():"0"+str.getSeconds():""}`;
    }
};
let Money = {
    // 数字金额转中文
    toChineseNum: function (num) {
        let Bit = ["零", "一", "二", "三", "四", "五", "六", "七", "八", "九", ];
        let AfterBit = ["", "十", "百", "千", "万"];
        num = parseInt(num);
        let getMoney = (temp) => {
            let strArr = temp.toString().split("").reverse();
            let newNum = "";
            for (var i = 0; i < strArr.length; i++) {
                newNum = (i == 0 && strArr[i] == 0 ? "" : i > 0 && strArr[i] == 0 && strArr[i - 1] == 0 ? "" : Bit[strArr[i]] + (strArr[i] == 0 ? AfterBit[0] : AfterBit[i])) + newNum;
            };
            return newNum;
        };
        let tenThousand = Math.floor(num / 10000);
        let noThousand = num % 10000;
        if (noThousand.toString().length < 4) {
            noThousand = "0" + noThousand;
        }
        return tenThousand ? getMoney(tenThousand) + "万" + getMoney(noThousand) : getMoney(num);
    },
    // 单选计算总价与总数量
    totalPrice: function (data, price, num, clicked = null) {
        let totalPrice = null;
        let totalNum = null;
        if (clicked === null || clicked === undefined || clicked.trim() === "") {
            data.map(item => {
                clicked = "clicked";
                item[clicked] = false;
            });
        }
        data.map(item => {
            item.count = item[price] * item[num];
            if (item[clicked]) {
                totalPrice += item.count;
                totalNum += item[num];
            };
        });
        data.totalPrice = totalPrice;
        data.totalNum = totalNum;
        return data;
    },
    // 全选计算总价与数量
    selectAll: function (data, price, num, clicked = null) {
        let totalPrice = null;
        let totalNum = null;
        let allClick = data.every(item => {
            return item[clicked]
        });
        if (allClick) {
            data.map(item => {
                item.count = item[price] * item[num];
                totalPrice += item.count;
                totalNum += item[num];
            });
        } else {
            totalPrice = 0;
            totalNum = 0;
        };
        data.totalPrice = totalPrice;
        data.totalNum = totalNum;
        return data;
    }
};

module.exports = {
    treeDate,
    time,
    Money
}