csamsserver/src/AccountService.kt

package com.gyf.csams

import org.jetbrains.exposed.sql.transactions.transaction
import org.slf4j.LoggerFactory
import java.time.ZoneOffset


class AccountService {


    companion object {
        private val logger = LoggerFactory.getLogger(AccountService::class.java)
        /**
         * 检查学号是否已注册,true=已注册
         */
        fun registered(selectId: String): Boolean {
            return transaction {
                return@transaction !User.find { Users.studentId eq selectId }.empty()
            }
        }

        /**
         * 注册
         */
        fun register(userVo: UserVo): UserResDto? {
            try {
                return transaction {
                    val _pwd = randomNum(8)
                    User.new {
                        studentId=userVo.studentId
                        name=userVo.name
                        password=_pwd.md5()
                    }
                    return@transaction UserResDto(password=_pwd)
                }
            } catch (e: Exception) {
                logger.error("注册失败,发生异常：$e")
                return null
            }
        }

        /**
         * 登录
         *
         * @param userLoginVo 登陆表单
         */
        fun login(userLoginVo: UserLoginVo,_ip:String):TokenResDto{
            return transaction {
                val user=User.find { Users.studentId eq userLoginVo.studentId }.firstOrNull()



                when {
                    user==null -> {
                        logger.warn("学号：${userLoginVo.studentId}不存在")
                        return@transaction TokenResDto(isValid = false)
                    }
                    userLoginVo.password.md5() != user.password -> {
                        logger.warn("密码：${userLoginVo.password}错误")
                        return@transaction TokenResDto(isValid = false)
                    }
                    else -> {
                        val token=UserToken.new{
                            studentId=userLoginVo.studentId
                            ip=_ip
                            device=userLoginVo.device
                            token=listOf(studentId,ip,device).joinToString(separator = ('a' .. 'z').random().toString()).md5()
                        }
                        return@transaction TokenResDto(isValid = true,token = Token(token = token.token,createTime = token.createTime.toEpochSecond(
                            ZoneOffset.of("+8")),studentId = token.studentId))
                    }
                }
            }
        }

        /**
         * 令牌校验
         *
         * @param tokenVo
         * @return
         */
        fun validToken(tokenVo: TokenVo):Boolean{
            return transaction {
                return@transaction !UserToken.find {
                    UserTokens.studentId eq tokenVo.studentId
                    UserTokens.token eq tokenVo.token
                }.empty()
            }
        }
    }
}