pagination in db layer

src/api/route/OutputServiceRDBServer.kt

@@ -34,18 +34,8 @@ class OutputServiceRDBServer {
 
         get("/output/page/{page}") {
             val page = call.parameters["page"] ?: error(HttpStatusCode.NotAcceptable)
-            val pageNum = page.toInt()
-            val results = resultObjectService.getAllResultObjects()
-            val maxPageNum = ceil(results.size / 10.0).roundToInt() - 1
-            if (pageNum == 0) {
-                call.respond(results.subList(0, 10))
-            } else {
-                if (pageNum == maxPageNum) {
-                    call.respond(results.subList((pageNum * 10) + 1, results.size))
-                } else {
-                    call.respond(results.subList((pageNum * 10) + 1, (pageNum * 10) + 10))
-                }
-            }
+            val pageNum = page.toLong()
+            call.respond(resultObjectService.getPage(pageNum))
         }
 
         get("/output/filter/negative") {

src/database/service/IResultObjectService.kt

@@ -7,6 +7,7 @@ import java.util.*
 interface IResultObjectService{
     fun addOne(apiObject: ApiObject)
     suspend fun getAllResultObjects(): List<ApiObject>
+    suspend fun getPage(page: Long): List<ApiObject>
     suspend fun getResultObjectbyTag(tag: String): ApiObject?
     suspend fun getResultObjectbyDate(date: LocalDate): List<ApiObject>?
     suspend fun getResultObjectbeforeDate(date: LocalDate): List<ApiObject>?

src/database/service/ResultObjectService.kt

@@ -27,6 +27,10 @@ class ResultObjectService : IResultObjectService {
         ResultObjects.selectAll().map { toResultObject(it) }
     }
 
+    override suspend fun getPage(page: Long): List<ApiObject> = dbQuery {
+        ResultObjects.selectAll().limit(10,page*10).map { toResultObject(it) }
+    }
+
     override suspend fun getResultObjectbyTag(tag: String): ApiObject? = dbQuery {
         ResultObjects.select {
             (ResultObjects.tag eq tag)