build guest rating system

src/main/kotlin/com/android/trisolarisserver/db/repo/GuestRatingRepo.kt

@@ -0,0 +1,27 @@
+package com.android.trisolarisserver.db.repo
+
+import com.android.trisolarisserver.models.booking.GuestRating
+import org.springframework.data.jpa.repository.Query
+import org.springframework.data.jpa.repository.JpaRepository
+import org.springframework.data.repository.query.Param
+import java.util.UUID
+
+interface GuestRatingRepo : JpaRepository<GuestRating, UUID> {
+    fun findByGuestIdOrderByCreatedAtDesc(guestId: UUID): List<GuestRating>
+    fun existsByGuestIdAndBookingId(guestId: UUID, bookingId: UUID): Boolean
+
+    @Query(
+        """
+        select gr.guest.id,
+            avg(case gr.score
+                when com.android.trisolarisserver.models.booking.GuestRatingScore.GOOD then 3
+                when com.android.trisolarisserver.models.booking.GuestRatingScore.OK then 2
+                when com.android.trisolarisserver.models.booking.GuestRatingScore.TROUBLE then 1
+                else null end)
+        from GuestRating gr
+        where gr.guest.id in :guestIds
+        group by gr.guest.id
+        """
+    )
+    fun findAverageScoreByGuestIds(@Param("guestIds") guestIds: Collection<UUID>): List<Array<Any>>
+}