more codes

src/main/kotlin/com/android/trisolarisserver/controller/Rooms.kt

@@ -1,6 +1,7 @@
 package com.android.trisolarisserver.controller
 
 import com.android.trisolarisserver.component.PropertyAccess
+import com.android.trisolarisserver.controller.dto.RoomAvailabilityRangeResponse
 import com.android.trisolarisserver.controller.dto.RoomAvailabilityResponse
 import com.android.trisolarisserver.controller.dto.RoomBoardResponse
 import com.android.trisolarisserver.controller.dto.RoomBoardStatus
@@ -25,6 +26,8 @@ import org.springframework.web.bind.annotation.RequestMapping
 import org.springframework.web.bind.annotation.ResponseStatus
 import org.springframework.web.bind.annotation.RestController
 import org.springframework.web.server.ResponseStatusException
+import java.time.LocalDate
+import java.time.ZoneId
 import java.util.UUID
 
 @RestController
@@ -106,6 +109,43 @@ class Rooms(
         }.sortedBy { it.roomTypeName }
     }
 
+    @GetMapping("/availability-range")
+    fun roomAvailabilityRange(
+        @PathVariable propertyId: UUID,
+        @AuthenticationPrincipal principal: MyPrincipal?,
+        @org.springframework.web.bind.annotation.RequestParam("from") from: String,
+        @org.springframework.web.bind.annotation.RequestParam("to") to: String
+    ): List<RoomAvailabilityRangeResponse> {
+        requirePrincipal(principal)
+        propertyAccess.requireMember(propertyId, principal!!.userId)
+
+        val property = propertyRepo.findById(propertyId).orElseThrow {
+            ResponseStatusException(HttpStatus.NOT_FOUND, "Property not found")
+        }
+
+        val fromDate = parseDate(from)
+        val toDate = parseDate(to)
+        if (!toDate.isAfter(fromDate)) {
+            throw ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid date range")
+        }
+        val zone = ZoneId.of(property.timezone)
+        val fromAt = fromDate.atStartOfDay(zone).toOffsetDateTime()
+        val toAt = toDate.atStartOfDay(zone).toOffsetDateTime()
+
+        val rooms = roomRepo.findByPropertyIdOrderByRoomNumber(propertyId)
+        val occupiedRoomIds = roomStayRepo.findOccupiedRoomIdsBetween(propertyId, fromAt, toAt).toHashSet()
+
+        val freeRooms = rooms.filter { it.active && !it.maintenance && !occupiedRoomIds.contains(it.id) }
+        val grouped = freeRooms.groupBy { it.roomType.name }
+        return grouped.entries.map { (typeName, roomList) ->
+            RoomAvailabilityRangeResponse(
+                roomTypeName = typeName,
+                freeRoomNumbers = roomList.map { it.roomNumber },
+                freeCount = roomList.size
+            )
+        }.sortedBy { it.roomTypeName }
+    }
+
     @PostMapping
     @ResponseStatus(HttpStatus.CREATED)
     fun createRoom(
@@ -182,6 +222,14 @@ class Rooms(
         val privileged = setOf(Role.ADMIN, Role.MANAGER, Role.STAFF, Role.HOUSEKEEPING, Role.FINANCE)
         return roles.none { it in privileged }
     }
+
+    private fun parseDate(value: String): LocalDate {
+        return try {
+            LocalDate.parse(value.trim())
+        } catch (_: Exception) {
+            throw ResponseStatusException(HttpStatus.BAD_REQUEST, "Invalid date format")
+        }
+    }
 }
 
 private fun Room.toRoomResponse(): RoomResponse {