init

src/main/kotlin/ddd/domain/validation/changeUsername/TimeIntervalValidation.kt

@@ -0,0 +1,21 @@
+package ddd.domain.validation.changeUsername
+
+import shared.exceptions.ChangeUsernameException
+import shared.validation.AbstractValidationHandler
+import java.time.Duration
+import java.time.LocalDateTime
+
+class TimeIntervalValidation : AbstractValidationHandler<UsernameChangeContext>() {
+    override fun validate(context: UsernameChangeContext) {
+        val lastChange = context.user.lastUsernameChange
+        val policy = context.user.rank.policy
+        
+        lastChange?.let { 
+            val daysBetween = Duration.between(it, LocalDateTime.now(context.clock)).toDays()
+            if (daysBetween < policy.getMaxChangeIntervalDays()) {
+                throw ChangeUsernameException("30天内禁止重复修改")
+            }
+        }
+        next(context) // 传递至下一个验证器
+    }
+}