# 2 08.封装组合式api简化代码

> 为了减少代码复杂量，我们简化一下代码 ，方便扩展性

* #### 组合式API
* > 新建文件： src/composables/useManager.js

```js
import { ref, reactive } from 'vue'
import { logout, updatepassword } from "~/api/manager"
import { showModal, toast } from "~/composables/util"
import { useRouter } from "vue-router"
import { useStore } from "vuex"



export function userRepassword() {
    const store = useStore()
    const router = useRouter()

    // 修改密码,点击登录验证
    const formDrawerRef = ref(null)
    const formRef = ref(null)

    const form = reactive({
        oldpassword: '',
        password: '',
        repassword: '',

    })

    // 定义验证规则
    const rules = {
        oldpassword: [
            {
                required: true,
                message: '旧密码不能为空',
                trigger: 'blur',
            },
        ],
        password: [
            {
                required: true,
                message: '新密码不能为空',
                trigger: 'blur',
            },
        ],
        repassword: [
            {
                required: true,
                message: '确认密码不能为空',
                trigger: 'blur',
            },
        ]
    }


    const onSubmit = () => {
        formRef.value.validate((valid) => {
            if (!valid) {
                console.log('error')
            }

            // 加载动画
            formDrawerRef.value.showLoading()

            updatepassword(form).then(res => {
                toast('修改密码成功，请重新登录')
                store.dispatch('logout')
                router.push('/login')
            }).finally(() => {
                formDrawerRef.value.hideLoading()
            })

        })
    }

    const openRePasswordForm = () => formDrawerRef.value.open()

    return {
        formDrawerRef,
        form,
        rules,
        formRef,
        onSubmit,
        openRePasswordForm
    }

}


export function useLogout() {
    const store = useStore()
    const router = useRouter()
    function handleLogout() {
        showModal("是否要退出登录？").then(res => {
            logout().finally(() => {
                // 退出
                store.dispatch('logout')
                // 跳转回登录页
                router.push('/login')
                // 提示退出登录成功
                toast('退出登录成功')
            })
        })
    }

    return {
        handleLogout
    }
}
```

*   #### 代码更改

    > FHeader.vue

```js
<template>
    <div class="f-header">
        <span class="logo">
            <el-icon class="mr-1"><eleme-filled></eleme-filled></el-icon>
            Vue+Vite编程
        </span>
        <el-icon class="icon-btn"><fold /></el-icon>
        <el-tooltip effect="dark" content="刷新" placement="bottom">
            <el-icon class="icon-btn" @click="handleRefresh"><refresh /></el-icon>
        </el-tooltip>
        


        <div class="ml-auto flex items-center">
            <el-tooltip effect="dark" content="全屏" placement="bottom">
                <el-icon  class="icon-btn" @click="toggle">
                    <full-screen v-if="!isFullscreen"/>
                    <aim v-else/>
                </el-icon>
            </el-tooltip>
            <el-dropdown class="dropdown" @command="handleCommand">
                <span class="flex items-center text-light-50">
                    <el-avatar class="mr-2" :size="25" :src="$store.state.user.avatar"></el-avatar>
                    {{ $store.state.user.username }}
                    <el-icon class="el-icon--right"> <arrow-down /></el-icon>
                </span>
                <template #dropdown>
                    <el-dropdown-menu>
                        <el-dropdown-item command="rePassword">修改密码</el-dropdown-item>
                        <el-dropdown-item command="logout">退出登录</el-dropdown-item>
                    </el-dropdown-menu>
                </template>
        </el-dropdown>
        </div>
    </div>


<!-- 修改密码 Start -->

    <form-drawer ref="formDrawerRef" title="修改密码" destroyOnClose @submit="onSubmit">

        <el-form  ref="formRef" :rules="rules" :model="form" label-width="80px" size="small">
            <el-form-item prop="oldpassword" label="旧密码">
                <el-input v-model="form.oldpassword" placeholder="请输入旧密码">
                    <template #prefix>
                        <el-icon><User /></el-icon>
                    </template>
                </el-input>
            </el-form-item>
            <el-form-item prop="password" label="新密码">
                <el-input type="password" v-model="form.password" placeholder="请输入新密码" show-password>
                    <template #prefix>
                        <el-icon><Lock /></el-icon>
                    </template>
                </el-input>
            </el-form-item>
            <el-form-item prop="repassword" label="确认密码">
                <el-input type="password" v-model="form.repassword" placeholder="请输入确认密码" show-password>
                    <template #prefix>
                        <el-icon><Lock /></el-icon>
                    </template>
                </el-input>
            </el-form-item>
        </el-form>

    </form-drawer>
    
<!-- 修改密码 End -->
</template>


<script setup>
import FormDrawer from '~/components/FormDrawer.vue'
import { useFullscreen } from '@vueuse/core'
import { userRepassword, useLogout } from '~/composables/useManager'

const { 
    // 是否全屏状态
    isFullscreen, 
    toggle 
} = useFullscreen()


const {
    formDrawerRef,
    form,
    rules,
    formRef,
    onSubmit,
    openRePasswordForm
} = userRepassword()


const {
    handleLogout
} = useLogout()


const handleCommand = (c) =>{
    switch (c) {
        case "logout":
            handleLogout()
            break;

        case "rePassword":
            openRePasswordForm()
            break;
    }
}


// 刷新
const handleRefresh = () => location.reload()




</script>

<style>
.f-header{
    @apply flex items-center bg-indigo-500 text-light-50 fixed top-0 left-0 right-0;
    height: 64px;
}

.logo{
    width: 250px;
    @apply flex justify-center items-center text-xl font-thin;
}

.icon-btn{
    @apply flex justify-center items-center;
    width: 42px;
    height: 64px;
    cursor: pointer;
}

.icon-btn:hover{
    @apply bg-indigo-600;
}

.f-header .dropdown{
    height: 64x;
    cursor: pointer;
    @apply flex justify-center items-center mx-5;
}
</style>
```
