Processing new bid MQTT messages

app/services/auctions/NewBid.scala

@@ -0,0 +1,39 @@
+package services.auctions
+
+import dao.{AuctionsDAO, UsersDAO}
+import models.Auction
+import play.api.libs.functional.syntax.toFunctionalBuilderOps
+import play.api.libs.json.{JsPath, JsResult, Reads}
+
+import java.time.Instant
+import javax.inject.Inject
+import scala.concurrent.{ExecutionContext, Future}
+
+object NewBid {
+  case class Request(bid: BigDecimal, bidderGid: String, timestamp: Instant)
+
+  given Reads[Request] = (
+    (JsPath \ "bid").read[BigDecimal] and
+      (JsPath \ "bidder_gid").read[String] and
+      (JsPath \ "timestamp").read[Instant]
+    )(Request.apply)
+}
+
+class NewBid @Inject()(auctionsDao: AuctionsDAO, usersDAO: UsersDAO)(using ec: ExecutionContext) {
+  import NewBid.Request
+
+  def perform(auctionGid: String, request: Request): Future[Option[Auction]] = {
+    val dataFuture = for {
+      auction <- auctionsDao.find_by_gid(auctionGid)
+      bidder <- usersDAO.find_by_gid(request.bidderGid)
+    } yield (auction, bidder)
+
+    dataFuture.flatMap {
+      case (Some(auction), Some(bidder)) =>
+        auctionsDao.newBid(auction, bidder, bid = request.bid, timestamp = request.timestamp)
+      case (_, _) =>
+        // One of them (or both) aren't found
+        Future.successful(None)
+    }
+  }
+}