build guest rating system

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

@@ -6,6 +6,7 @@ import com.android.trisolarisserver.controller.dto.GuestVehicleRequest
 import com.android.trisolarisserver.models.booking.Guest
 import com.android.trisolarisserver.models.booking.GuestVehicle
 import com.android.trisolarisserver.db.repo.GuestRepo
+import com.android.trisolarisserver.db.repo.GuestRatingRepo
 import com.android.trisolarisserver.repo.GuestVehicleRepo
 import com.android.trisolarisserver.repo.PropertyRepo
 import com.android.trisolarisserver.security.MyPrincipal
@@ -21,7 +22,8 @@ class Guests(
     private val propertyAccess: PropertyAccess,
     private val propertyRepo: PropertyRepo,
     private val guestRepo: GuestRepo,
-    private val guestVehicleRepo: GuestVehicleRepo
+    private val guestVehicleRepo: GuestVehicleRepo,
+    private val guestRatingRepo: GuestRatingRepo
 ) {
 
     @GetMapping("/search")
@@ -52,7 +54,7 @@ class Guests(
             val vehicle = guestVehicleRepo.findByOrgIdAndVehicleNumberIgnoreCase(orgId, vehicleNumber)
             if (vehicle != null) guests.add(vehicle.guest)
         }
-        return guests.toResponse(guestVehicleRepo)
+        return guests.toResponse(guestVehicleRepo, guestRatingRepo)
     }
 
     @PostMapping("/{guestId}/vehicles")
@@ -85,7 +87,7 @@ class Guests(
             vehicleNumber = request.vehicleNumber.trim()
         )
         guestVehicleRepo.save(vehicle)
-        return setOf(guest).toResponse(guestVehicleRepo).first()
+        return setOf(guest).toResponse(guestVehicleRepo, guestRatingRepo).first()
     }
 
     private fun requirePrincipal(principal: MyPrincipal?) {
@@ -95,10 +97,22 @@ class Guests(
     }
 }
 
-private fun Set<Guest>.toResponse(guestVehicleRepo: GuestVehicleRepo): List<GuestResponse> {
+private fun Set<Guest>.toResponse(
+    guestVehicleRepo: GuestVehicleRepo,
+    guestRatingRepo: GuestRatingRepo
+): List<GuestResponse> {
     val ids = this.mapNotNull { it.id }
     val vehicles = if (ids.isEmpty()) emptyList() else guestVehicleRepo.findByGuestIdIn(ids)
     val vehiclesByGuest = vehicles.groupBy { it.guest.id }
+    val averages = if (ids.isEmpty()) {
+        emptyMap()
+    } else {
+        guestRatingRepo.findAverageScoreByGuestIds(ids).associate { row ->
+            val guestId = row[0] as UUID
+            val avg = row[1] as Double
+            guestId to avg
+        }
+    }
     return this.map { guest ->
         GuestResponse(
             id = guest.id!!,
@@ -107,7 +121,8 @@ private fun Set<Guest>.toResponse(guestVehicleRepo: GuestVehicleRepo): List<Gues
             phoneE164 = guest.phoneE164,
             nationality = guest.nationality,
             addressText = guest.addressText,
-            vehicleNumbers = vehiclesByGuest[guest.id]?.map { it.vehicleNumber }?.toSet() ?: emptySet()
+            vehicleNumbers = vehiclesByGuest[guest.id]?.map { it.vehicleNumber }?.toSet() ?: emptySet(),
+            averageScore = averages[guest.id]
         )
     }
 }