add Mapping.kt

src/main/kotlin/ltd/hlaeja/util/Mapping.kt

@@ -0,0 +1,20 @@
+package ltd.hlaeja.util
+
+import java.time.Instant
+import java.time.ZoneId
+import java.time.ZonedDateTime
+import java.util.UUID
+import ltd.hlaeja.entity.NodeEntity
+import ltd.hlaeja.library.deviceConfiguration.Node
+
+fun NodeEntity.toResponse(): Node.Response = Node.Response(
+    node = id,
+    timestamp = ZonedDateTime.ofInstant(timestamp, ZoneId.systemDefault()),
+    configuration = configuration,
+)
+
+fun Node.Request.toEntity(node: UUID): NodeEntity = NodeEntity(
+    id = node,
+    timestamp = Instant.now(),
+    configuration = configuration,
+)