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| import React, { useState, useEffect, useContext } from 'react'
import UserContext from './UserContext'
const Login = (props) => {
const [email, setEmail] = useState('123@qq.com')
const [password, setPassword] = useState('123a3442')
let userContext = useContext(UserContext) ///////在这里传入
useEffect(() => {
document.title = '登录'
})
let [dirty, setDirty] = useState({
email: false,
password: false,
})
const [errors, setErrors] = useState({
email: [],
password: [],
})
const [message, setMessage] = useState('')
const validate = () => {
const errorsData = {}
errorsData.email = []
if (!email) {
errorsData.email.push('邮箱不能为空')
}
let emailReg = /[^@ \t\r\n]+@[^@ \t\r\n]+\.[^@ \t\r\n]+/
if (email) {
if (!emailReg.test(email)) {
errorsData.email.push('邮箱输入格式有误')
}
}
errorsData.password = []
if (!password) {
errorsData.password.push('密码不能为空')
}
let passwordReg = /^(?=.*?[a-z])(?=.*?[0-9]).{8,16}$/
if (password) {
if (!passwordReg.test(password)) {
errorsData.password.push('密码输入格式有误')
}
}
setErrors(errorsData)
}
useEffect(validate, [password, email, setErrors])
let onClickLogin = async () => {
let dirtyData = dirty
Object.keys(dirtyData).forEach((control) => {
dirtyData[control] = true
})
setDirty(dirtyData)
validate()
if (isValid()) {
let response = await fetch(
`http://localhost:5000/users?email=${email}&password=${password}`,
{ method: 'GET' }
)
if (response.ok) {
let body = await response.json()
if (body.length > 0) {
setMessage(<span className="text-success">登录成功</span>)
userContext.setUser({
...userContext.user,
isLoggin: true,
currentUserName: body[0].fullName,
currentUserId: body[0].id,
currentUserRole: body[0].role,
})
if (body[0].role === 'user') {
props.history.replace('/dashboard')
} else if(body[0].role==="admin") {
props.history.replace('./products')
}
} else {
setMessage(<span className="text-danger">无效登录，请重新尝试</span>)
}
}
}
}
let isValid = () => {
let valid = true
for (let control in errors) {
if (errors[control].length > 0) {
valid = false
}
}
return valid
}
return (
<div className="row">
<div className="col-lg-5 col-md-7 mx-auto">
<div className="card boder-success shadow-lg my-2">
<div className="card-header border-bottom border-success">
<h4 style={{ fontSize: '40px' }} className="text-success">
Login
</h4>
</div>
<div className="card-body boder-bottom boder-success">
<div className="form-group">
<label htmlFor="email">Email</label>
<input
value={email}
type="text"
className="form-control"
id="email"
placeholder="Email"
onChange={(e) => {
setEmail(e.target.value)
}}
onBlur={() => {
setDirty({ ...dirty, email: true })
validate()
}}
/>
<div className="text-danger">
{dirty.email && errors.email.length > 0 ? errors.email : ''}
</div>
</div>
<div className="form-group">
<label htmlFor="password">Password</label>
<input
type="password"
className="form-control"
id="password"
placeholder="Password"
value={password}
onChange={(e) => {
setPassword(e.target.value)
}}
onBlur={() => {
setDirty({ ...dirty, password: true })
validate()
}}
/>
<div className="text-danger">
{dirty.password && errors.password.length > 0
? errors.password
: ''}
</div>
</div>
<div className="card-footer text-right">
<div className="">{message}</div>
<div>
<button
className="btn btn-primary mycolor"
onClick={onClickLogin}
>
登录
</button>
</div>
</div>
</div>
</div>
</div>
</div>
)
}
export default Login
|