Add websockets and notify frontend when an item is processed

modules/backend/src/main/scala/docspell/backend/msg/Ping.scala

@@ -1,31 +0,0 @@
-/*
- * Copyright 2020 Eike K. & Contributors
- *
- * SPDX-License-Identifier: AGPL-3.0-or-later
- */
-
-package docspell.backend.msg
-
-import java.util.concurrent.atomic.AtomicLong
-
-import docspell.pubsub.api.{Topic, TypedTopic}
-
-import io.circe.generic.semiauto.{deriveDecoder, deriveEncoder}
-import io.circe.{Decoder, Encoder}
-
-final case class Ping(sender: String, num: Long)
-
-object Ping {
-  implicit val jsonDecoder: Decoder[Ping] =
-    deriveDecoder[Ping]
-
-  implicit val jsonEncoder: Encoder[Ping] =
-    deriveEncoder[Ping]
-
-  private[this] val counter = new AtomicLong(0)
-  def next(sender: String): Ping =
-    Ping(sender, counter.getAndIncrement())
-
-  val topic: TypedTopic[Ping] =
-    TypedTopic[Ping](Topic("ping"))
-}

modules/backend/src/main/scala/docspell/backend/msg/Topics.scala

@@ -19,5 +19,5 @@ object Topics {
 
   /** A list of all topics. It is required to list every topic in use here! */
   val all: NonEmptyList[TypedTopic[_]] =
-    NonEmptyList.of(Ping.topic, JobDone.topic, CancelJob.topic, jobsNotify)
+    NonEmptyList.of(JobDone.topic, CancelJob.topic, jobsNotify)
 }