完成登录模块

一、实现布局

万丈高楼平地起，我们先将基本的布局搭建好，再来实现逻辑。

<template>
  <div class="login-container">
    <div class="login-form">
      <h1>企业级中后台管理系统</h1>
      <el-form :model="userInfo" :rules="rules" ref="formRef">
        <el-form-item prop="username">
          <el-input
            v-model="userInfo.username"
            placeholder="请输入用户名"
            :prefix-icon="User"
          />
        </el-form-item>
        <el-form-item prop="password">
          <el-input
            v-model="userInfo.password"
            type="password"
            placeholder="请输入密码"
            :prefix-icon="Lock"
          />
        </el-form-item>
        <el-form-item>
          <el-button type="primary" @click="handleUserLogin" class="login-btn">
            登录
          </el-button>
        </el-form-item>
      </el-form>
    </div>
  </div>
</template>

二、Mock数据

页面搭建完毕之后，由于在工作中后端的接口有可能还没开发完，因此我们需要用到mock来模拟数据，等到后端开发完接口再进行替换。mock环境在01章节已经搭建完毕，因此我们只需要创建相对应的mock接口就好了。

import type { MockMethod } from 'vite-plugin-mock'

export default [
  {
    url: '/mock/api/login',
    method: 'post',
    response: ({ body }) => {
      if (body.username !== body.password) {
        return {
          code: 1,
          message: '密码错误',
          data: {
            username: '',
            roles: [],
            accessToken: '',
          },
        }
      }
      if (body.username === 'admin') {
        return {
          code: 0,
          message: '登录成功',
          data: {
            username: 'admin',
            roles: ['admin'],
            accessToken: 'admin',
          },
        }
      } else {
        return {
          code: 0,
          message: '登录成功',
          data: {
            username: 'common',
            roles: ['common'],
            accessToken: 'common',
          },
        }
      }
    },
  },
] as MockMethod[]

三、功能实现

3.1 编写接口

import RYRequest from '@/http'
import { loginRequest, loginResponse } from './type'
import { BaseResponse } from '@/http/request/type'

export const userLogin = (data: loginRequest) =>
  RYRequest.post<BaseResponse<loginResponse>>({ url: '/login', data })

export interface loginRequest {
  username: string
  password: string
}

export interface loginResponse {
  username: string
  accessToken: string
  roles: string[]
}

export interface reLoginRequest {
  accessToken: string
}

3.2 使用pinia调用接口

由于我们登录的数据每一个页面都有可能要用到，因此我们用到pinia来保存。

import { defineStore } from 'pinia'
import { IUserState } from '@/store/user/type'
import { loginRequest } from '@/api/user/type'
import { userLogin } from '@/api/user/user'
import { ElMessage } from 'element-plus'

const useUserStore = defineStore('user', {
  state: (): IUserState => ({
    username: '',
    accessToken: '',
    refreshToken: '',
    roles: [],
  }),
  actions: {
    async userLoginAction(data: loginRequest) {
      const userLoginResult = await userLogin(data)
      if (userLoginResult.code === 0) {
        this.username = userLoginResult.data.username
        this.accessToken = userLoginResult.data.accessToken
        this.roles = userLoginResult.data.roles
        ElMessage.success(userLoginResult.message)
      } else {
        ElMessage.error(userLoginResult.message)
      }
    },
  },
  persist: {
    key: 'user',
    paths: ['accessToken'],
    storage: sessionStorage,
  },
})

export default useUserStore

persist属性是用来使用本地存储的，之前我们已经安装了pinia-plugin-persistedstate依赖，因此在创建store时配置persist属性来对数据进行持久化存储，path属性还可以选择需要持久化存储的数据，storeage可以选择持久化存储的类型，一般是localStorage或者sessionStorage。

3.3 登录功能的实现

做好上面的准备工作，我们可以正式来实现登录功能了。

<script setup lang="ts">
import { reactive, ref } from 'vue'
import { User, Lock } from '@element-plus/icons-vue'
import useUserStore from '@/store/user'
import { useRouter } from 'vue-router'
import type { ElForm, FormRules } from 'element-plus'

const formRef = ref<InstanceType<typeof ElForm>>(null)
const userInfo = reactive({
  username: '',
  password: '',
})
const rules = reactive<InstanceType<typeof FormRules>>({
  username: [{ required: true, message: '请输入用户名', trigger: 'blur' }],
  password: [{ required: true, message: '请输入密码', trigger: 'blur' }],
})

// 登录
const userStore = useUserStore()
const router = useRouter()
const handleUserLogin = async () => {
  await formRef.value?.validate()
  await userStore.userLoginAction(userInfo)
  await router.push('/')
}
</script>