demo

src/main/kotlin/mvc/services/UserComplexService.kt

@@ -3,16 +3,89 @@ package mvc.services
 import shared.exceptions.NotFoundException
 import mvc.dao.UserRepository
 import mvc.entities.User
+import mvc.entities.UserRankEnum
+import mvc.entities.UserStatusEnum
+import shared.dto.ChangeUsernameDto
+import shared.exceptions.ChangeUsernameException
+import java.time.Clock
+import java.time.Duration
+import java.time.LocalDateTime
 
 
 class UserComplexService(
-    val repository: UserRepository
+    val repository: UserRepository,
 ) : UserService {
     // 用户
-    override fun changeUsername(user: User): User {
-        val findUser = repository.findById(user.id) ?: throw NotFoundException("User ${user.id} not found")
-        val copy = findUser.copy(firstName = user.firstName, lastName = user.lastName)
-        repository.update(copy)
-        return copy
+    override fun changeUsername(userDto: ChangeUsernameDto): User {
+        val user = repository.findById(userDto.id) ?: throw NotFoundException("用户${userDto.id}不存在")
+        // 判断用户状态
+        if (user.status != UserStatusEnum.ACTIVE) throw ChangeUsernameException("用户未激活")
+        // 用户名长度
+        if( !(user.firstName.length + user.lastName.length in 4..20)) {
+            throw ChangeUsernameException("用户名长度需在4-20之间")
+        }
+
+        // 检测非法字符
+        val regex = Regex("^[a-zA-Z0-9_]+$")
+        if(!regex.matches(userDto.firstName) || !regex.matches(userDto.lastName)) {
+            throw ChangeUsernameException("包含非法字符")
+        }
+
+        // 检测权限
+        var canChangeUsername = false
+        var requiresEmailVerification = false
+        var maxChangeIntervalDays = 0
+        when (user.rank) {
+            UserRankEnum.REGULAR -> {
+                canChangeUsername = false
+                requiresEmailVerification = false
+                maxChangeIntervalDays = 0
+            }
+
+            UserRankEnum.VIP -> {
+                canChangeUsername = true
+                requiresEmailVerification = true
+                maxChangeIntervalDays = 30
+            }
+
+            UserRankEnum.INTERNAL -> {
+                canChangeUsername = true
+                requiresEmailVerification = false
+                maxChangeIntervalDays = 0
+            }
+        }
+
+        if (!canChangeUsername) throw ChangeUsernameException("用户没有权限修改用户名")
+
+        if (requiresEmailVerification) {
+            val emailVerified = VerificationService().isVerified(user.id, userDto.verificationCode)
+            if (!emailVerified) {
+                throw ChangeUsernameException("验证码错误")
+            }
+        }
+
+        user.lastUsernameChange?.let{
+            val daysBetween =
+                Duration.between(user.lastUsernameChange, LocalDateTime.now(Clock.systemDefaultZone())).toDays()
+            if (daysBetween < maxChangeIntervalDays) {
+                throw ChangeUsernameException("30天内禁止重复修改")
+            }
+        }
+
+        // 检测相同名
+        if(user.firstName == userDto.firstName && user.lastName == userDto.lastName) {
+            throw ChangeUsernameException("不能修改为当前用户名")
+        }
+        val findByUsername = repository.findByUsername(userDto.firstName, userDto.lastName)
+        if(findByUsername != null) {
+            throw ChangeUsernameException("用户名已存在")
+        }
+
+
+        user.firstName = userDto.firstName
+        user.lastName = userDto.lastName
+        user.lastUsernameChange = LocalDateTime.now(Clock.systemDefaultZone())
+        repository.update(user)
+        return user
     }
 }

src/main/kotlin/mvc/services/UserService.kt

@@ -1,7 +1,8 @@
 package mvc.services
 
 import mvc.entities.User
+import shared.dto.ChangeUsernameDto
 
 interface UserService {
-    fun changeUsername(user: User): User
+    fun changeUsername(userDto: ChangeUsernameDto): User
 }

src/main/kotlin/mvc/services/UserSimpleService.kt

@@ -3,12 +3,14 @@ package mvc.services
 import shared.exceptions.NotFoundException
 import mvc.dao.UserRepository
 import mvc.entities.User
+import shared.dto.ChangeUsernameDto
 
 class UserSimpleService(val repository: UserRepository) : UserService {
-    override fun changeUsername(user: User): User {
-        val findUser = repository.findById(user.id) ?: throw NotFoundException("User ${user.id} not found")
-        val copy = findUser.copy(firstName = user.firstName, lastName = user.lastName)
-        repository.update(copy)
-        return copy
+    override fun changeUsername(userDto: ChangeUsernameDto): User {
+        val findUser = repository.findById(userDto.id) ?: throw NotFoundException("用户${userDto.id}不存在")
+        findUser.firstName = userDto.firstName
+        findUser.lastName = userDto.lastName
+        repository.update(findUser)
+        return findUser
     }
 }

src/main/kotlin/mvc/services/VerificationService.kt

@@ -0,0 +1,7 @@
+package mvc.services
+
+class VerificationService {
+     fun isVerified(userId: Long, code: String): Boolean {
+        return "1234" == code
+    }
+}