五、express实战-英雄管理系统

const express = require("express");
const bodyParser = require("body-parser");

app.use(bodyParser.urlencoded({ extended: false }));
// 登录接口
app.post("/login", (req, res) => {
  // 接收用户传递过来的用户名和密码
  let { username, password } = req.body;
  if (username == "admin" && password == "123") {
    res.send({
      code: 200,
      msg: "登陆成功",
    });
  } else {
    res.send({
      code: 400,
      msg: "登陆失败",
    });
  }
});
app.listen(3000, () => {
  console.log("开启成功");
});

const path = require("path");
// 导入自己写的模块(需要拼接绝对路径)
const db = require(path.join(__dirname, "utils", "db.js"));
// 获取所有英雄接口
app.get("/getAllHero", (req, res) => {
  // 调用自己写的db.js模块中的方法,获取所有英雄
  let list = db.getHeros();
  res.send({
    code: 200,
    data: list,
  });
});

app.get("/getHeroById", (req, res) => {
    let { id } = req.query;
    let result = db.getHeroById(id);
    if (result != false) {
        res.send({
            code: 200,
            msg: "获取成功",
            data: result,
        });
    } else {
        res.send({
            code: 400,
            msg: "获取失败",
        });
    }
});

$(function () {
    $('.login').on('click', function (e) {
        e.preventDefault()
        let username = $('#username').val().trim()
        let password = $('#password').val().trim()
        $.ajax({
            type: 'post',
            url: 'http://127.0.0.1:3000/login',
            data: {
                username,
                password
            },
            success: function (backData) {
                if (backData.code == 200) {
                    alert('登录成功')
                    window.location.href = 'index.html'
                } else {
                    alert(backData.msg)
                }
            }
        })
    })
}
 )

$(function () {
    $.ajax({
        type: 'get',
        url: 'http://127.0.0.1:3000/getAllHero',
        success: function (res) {
            console.log(res)
            // var temp = template('cq', res);
            // $('tbody').html(temp)
            if (res.code == 200) {
                // 通过模板引擎渲染
                var resHtml = template('cq', res)
                console.log(resHtml)
                $('tbody').html(resHtml)
            }
        }
    })
})

// 模板引擎
<script type="text/html" id="cq">
  {{each data v}}
  <tr>
    <td><img src="{{v.icon}}"></td>
    <td>{{v.name}}</td>
    <td>{{v.skill}}</td>
    <td>
      <button onclick="location.href='./edit.html?id={{v.id}}'" class="btn btn-primary">编辑</button>
      <button  data-id='{{v.id}}' class="btn btn-danger delete">删除</button>
    </td>
    </tr>
  {{/each}}
</script>

$('tbody').on('click', '.delete', function () {
    var that = this;
    // console.log(this)
    var id = $(this).attr('data-id').trim();
    if (confirm('你要删除吗??')) {
        $.ajax({
            type: 'get',
            url: 'http://127.0.0.1:3000/delete',
            data: {
                id: id
            },
            success: function (res) {
                // console.log(res)
                if (res.code == 200) {
                    $(that).parent().parent().remove();
                }
            }
        })
    }
})

$(function () {
  var id = window.location.search.split('=')[1];
  console.log(id)
  $.ajax({
    type: 'get',
    url: 'http://127.0.0.1:3000/getHeroById',
    data: {
      id: id
    },
    success: function (res) {
      // console.log(res)
      if (res.code == 200) {
        $('#heroName').val(res.data.name)

        $('#skillName').val(res.data.skill);
        $('.preview').attr('src', res.data.icon);
        $('#id').val(id)
      }
    }
  })

  $('#heroIcon').on('change', function () {
    // console.log()
    var fileName = URL.createObjectURL(this.files[0]);
    $('.preview').attr('src', fileName)
  })

  //保存数据
  $('.btn-save').on('click', function (e) {
    e.preventDefault();
    var formData = new FormData($('form')[0]);
    $.ajax({
      type: 'post',
      url: 'http://127.0.0.1:3000/edit',
      data: formData,
      contentType: false,
      processData: false,
      success: function (res) {
        //   console.log(res)

        if (res.code == 200) {
          alert(res.msg);
          window.location.href = './index.html';

        } else {
          alert(res.msg)
        }
      }
    })
  })
})

// 如果找不到页面
app.use((req, res) => {
  // 服务器重定向：主动修改地址栏
  res.writeHead(302, {
    Location: "http://www.baidu.com",
  });
  res.end();
});