學生信息統計表

const readline = require('readline-sync');
let maxLength = 5;
//帳號庫
let accountName = () => {
    let account = [{ name: '123', password: 456 },
    { name: 'lisi', password: 123 },
    { name: 'wangwu', password: 123 }]
    return account;
}
//信息庫
let dateBase = () => {
    let date = [
        { id: 1, name: 'zhang', age: '18', gender: 'man', score: '98' },
        { id: 2, name: 'liu', age: '19', gender: 'woman', score: '78' },
        { id: 3, name: 'wang', age: '20', gender: 'woman', score: '65' },
        { id: 4, name: 'wang', age: '20', gender: 'woman', score: '65' },
        { id: 5, name: 'yang', age: '22', gender: 'man', score: '100' }
    ];
    return date;
}
//數據格式化
let dateFrom = (arr) => {
    console.log('學號 \t 姓名\t 年齡\t 性別\t 成績\t ')
    for (let item of arr) {
        let { id, name, age, gender, score } = item;
        console.log(id + '\t', name + '\t', age + '\t', gender + '\t', score + '\t')
    }
}
// 登錄
let login = (account) => {
    let error = 3
    while (true) {
        console.log('請輸入帳號：')
        let uesrname = readline.question();
        console.log('請輸入密碼：')
        let password = readline.question();
        for (i = 0; i < account.length; i++) {
            if (uesrname == account[i].name && password == account[i].password) {
                console.log('登錄成功');
                operation();
                return true;
            }
        }
        error--;
        if (error == 0) {
            console.log('輸入次數過多，退出程序')
            return true;
        }
        console.log('登陸錯誤，還有' + error + '次機會，請從新輸入')
    }
}
//註冊
let register = (account) => {
    while (true) {
        console.log('請輸入註冊帳號：')
        let username = readline.question();
        let flag = false;
        for (let i = 0; i < account.length; i++) {
            if (account[i].name === username) {
                console.log('帳號已被佔用，請從新註冊~')
                flag = true;
            }
        }
        if (flag) {
            continue;
        }
        console.log('請輸入註冊密碼：')
        let getpassword = readline.question();
        let table = {
            name: username,
            password: getpassword
        }
        account.push(table);
        console.log(`恭喜你，註冊成功！帳號爲${username},密碼爲${getpassword}。即將跳轉登陸頁面...`)
        login(account);
        break;
    }
}
//分類查詢
let classQuery = (key, date) => {
    console.log('請輸入查詢信息：')
    let queryDate = readline.question();
    let reg = new RegExp(queryDate);
    let arr = [];
    let i =0;
    for (let item of date) {
        if (item[key].search(reg) != -1) {
            arr.push(item)
            i++;
        }
    }
    if(i==0)
    {
        console.log('無此信息')
        return;
    }
    dateFrom(arr);
}
//查詢
let query = (date) => {
    console.log('請選擇查詢方式： 1.查詢全部 2.分類查詢');
    let option = readline.question() - 0;
    switch (option) {
        case 1:
            dateFrom(date);
            break;
        case 2: {
            console.log('請選擇查詢: 1.姓名 2.年齡 3.性別 4.成績')
            let queryOption = readline.question() - 0;
            switch (queryOption) {
                case 1: classQuery('name', date); break;
                case 2: classQuery('age', date); break;
                case 3: classQuery('gender', date); break;
                case 4: classQuery('score', date); break;
                default:console.log('選擇有誤，返回主菜單~');break;
            }break;
        }
    }
}
//新增
let increre = (date) => {
    console.log('請輸入要新增學生的姓名：')
    let name = readline.question();
    console.log('請輸入要新增學生的年齡：')
    let age = readline.question();
    console.log('請輸入要新增學生的性別：')
    let gender = readline.question();
    console.log('請輸入要新增學生的成績：')
    let score = readline.question();
    date.push({ id: ++maxLength, name, age, gender, score })
    console.log(maxLength);
    console.log('新增成功!該學生信息以下：');
    let arr = [];
    arr.push(date[date.length - 1]);
    dateFrom(arr);
}
//分類修改數據
let classModify = (date, i, key) => {
    console.log('請輸入新的數據');
    let newDate = readline.question();
    date[i][key] = newDate;
    console.log('修改爲功!該學生信息以下：');
    let arr = [];
    arr.push(date[i]);
    dateFrom(arr);
    return;
}
//修改
let modify = (date) => {
    while (true) {
        console.log('請輸入要修改學生的學號：')
        let id = readline.question();
        for (let i = 0; i < date.length; i++) {
            if (date[i].id == id) {
                console.log('當前學生信息以下：')
                let arr = [];
                arr.push(date[i]);
                dateFrom(arr);
                console.log('請選擇要修改的信息  1.姓名 2.年齡 3.性別 4.成績 5.返回 ')
                let option = readline.question() - 0;
                switch (option) {
                    case 1: classModify(date, i, 'name'); break;
                    case 2: classModify(date, i, 'age'); break;
                    case 3: classModify(date, i, 'gender'); break;
                    case 4: classModify(date, i, 'score'); break;
                    case 5: return;
                }
                return;
            }
        }
        console.log('無此學生信息,請從新輸入')
    }
}
//刪除
let deletedate = (date) => {
    while (true) {
        console.log('請輸入要刪除的學號：')
        let id = readline.question();
        for (let i = 0; i < date.length; i++) {
            if (date[i].id == id) {
                console.log('當前學生信息以下：')
                let arr = [];
                arr.push(date[i]);
                dateFrom(arr);
                console.log('確認刪除：1.是 2.否')
                let num = readline.question();
                if (num == 1) {
                    date.splice(i, 1)
                    console.log('刪除成功！')
                    return;
                }
                if (num == 2) {
                    return;
                }
            }
        }
        console.log('無此學生信息,請從新輸入')
    }
}
//操做選項
let operation = () => {
    let date = dateBase();
    while (true) {
        console.log('請選擇操做 1.查詢 2.新增 3.修改 4.刪除 5.退出 ')
        let option = readline.question() - 0;
        switch (option) {
            case 1: query(date); break;
            case 2: increre(date); break;
            case 3: modify(date); break;
            case 4: deletedate(date); break;
            case 5: return false;
        }
    }
}
//主頁
let main = () => {
    let account = accountName();
    while (true) {
        console.log('請選擇 1.登錄  2.註冊  3.退出')
        let num = readline.question() - 0;
        switch (num) {
            case 1:
                let flag = false;
                flag = login(account);
                if (flag) {
                    return;
                }
                break;
            case 2:
                register(account);
                break;
            case 3:
                console.log('謝謝使用！');
                return;
        }
    }
}

main();