Add basic graphql implementation with manga and chapters loading with data loaders

server/src/main/kotlin/suwayomi/tachidesk/graphql/dataLoaders/MangaDataLoader.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) Contributors to the Suwayomi project
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/. */
+
+package suwayomi.tachidesk.graphql.dataLoaders
+
+import com.expediagroup.graphql.dataloader.KotlinDataLoader
+import org.dataloader.DataLoader
+import org.dataloader.DataLoaderFactory
+import org.jetbrains.exposed.sql.StdOutSqlLogger
+import org.jetbrains.exposed.sql.addLogger
+import org.jetbrains.exposed.sql.select
+import org.jetbrains.exposed.sql.transactions.transaction
+import suwayomi.tachidesk.graphql.types.MangaType
+import suwayomi.tachidesk.manga.model.table.MangaTable
+import java.util.concurrent.CompletableFuture
+
+class MangaDataLoader : KotlinDataLoader<Int, MangaType> {
+    override val dataLoaderName = "MangaDataLoader"
+    override fun getDataLoader(): DataLoader<Int, MangaType> = DataLoaderFactory.newDataLoader<Int, MangaType> { ids ->
+        CompletableFuture.supplyAsync {
+            transaction {
+                addLogger(StdOutSqlLogger)
+                MangaTable.select { MangaTable.id inList ids }
+                    .map { MangaType(it) }
+            }
+        }
+    }
+}