Add a task implementation to delete items

modules/backend/src/main/scala/docspell/backend/ops/OItemSearch.scala

@@ -23,6 +23,8 @@ import doobie.implicits._
 trait OItemSearch[F[_]] {
   def findItem(id: Ident, collective: Ident): F[Option[ItemData]]
 
+  def findDeleted(collective: Ident, limit: Int): F[Vector[RItem]]
+
   def findItems(maxNoteLen: Int)(q: Query, batch: Batch): F[Vector[ListItem]]
 
   /** Same as `findItems` but does more queries per item to find all tags. */
@@ -145,6 +147,13 @@ object OItemSearch {
               .toVector
           }
 
+      def findDeleted(collective: Ident, limit: Int): F[Vector[RItem]] =
+        store
+          .transact(RItem.findDeleted(collective, limit))
+          .take(limit.toLong)
+          .compile
+          .toVector
+
       def findItemsWithTags(
           maxNoteLen: Int
       )(q: Query, batch: Batch): F[Vector[ListItemWithTags]] =

modules/joex/src/main/scala/docspell/joex/JoexAppImpl.scala

@@ -18,6 +18,7 @@ import docspell.common._
 import docspell.ftsclient.FtsClient
 import docspell.ftssolr.SolrFtsClient
 import docspell.joex.analysis.RegexNerFile
+import docspell.joex.emptytrash._
 import docspell.joex.fts.{MigrationTask, ReIndexTask}
 import docspell.joex.hk._
 import docspell.joex.learn.LearnClassifierTask
@@ -102,6 +103,7 @@ object JoexAppImpl {
       upload        <- OUpload(store, queue, cfg.files, joex)
       fts           <- createFtsClient(cfg)(httpClient)
       itemOps       <- OItem(store, fts, queue, joex)
+      itemSearchOps <- OItemSearch(store)
       analyser      <- TextAnalyser.create[F](cfg.textAnalysis.textAnalysisConfig)
       regexNer      <- RegexNerFile(cfg.textAnalysis.regexNerFileConfig, store)
       javaEmil =
@@ -206,6 +208,13 @@ object JoexAppImpl {
             AllPageCountTask.onCancel[F]
           )
         )
+        .withTask(
+          JobTask.json(
+            EmptyTrashArgs.taskName,
+            EmptyTrashTask[F](itemOps, itemSearchOps),
+            EmptyTrashTask.onCancel[F]
+          )
+        )
         .resource
       psch <- PeriodicScheduler.create(
         cfg.periodicScheduler,

modules/joex/src/main/scala/docspell/joex/emptytrash/EmptyTrashTask.scala

@@ -0,0 +1,68 @@
+/*
+ * Copyright 2020 Docspell Contributors
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package docspell.joex.emptytrash
+
+import cats.effect._
+import cats.implicits._
+import fs2.Stream
+
+import docspell.backend.ops.{OItem, OItemSearch}
+import docspell.common._
+import docspell.joex.scheduler._
+import docspell.store.records.RItem
+
+object EmptyTrashTask {
+
+  type Args = EmptyTrashArgs
+
+  def onCancel[F[_]]: Task[F, Args, Unit] =
+    Task.log(_.warn("Cancelling empty-trash task"))
+
+  private val pageSize = 20
+
+  def apply[F[_]: Async](
+      itemOps: OItem[F],
+      itemSearchOps: OItemSearch[F]
+  ): Task[F, Args, Unit] =
+    Task { ctx =>
+      val collId = ctx.args.collective
+      for {
+        _        <- ctx.logger.info(s"Starting removing all soft-deleted items")
+        nDeleted <- deleteAll(collId, itemOps, itemSearchOps, ctx)
+        _        <- ctx.logger.info(s"Finished deleting ${nDeleted} items")
+      } yield ()
+    }
+
+  private def deleteAll[F[_]: Async](
+      collective: Ident,
+      itemOps: OItem[F],
+      itemSearchOps: OItemSearch[F],
+      ctx: Context[F, _]
+  ): F[Int] =
+    Stream
+      .eval(itemSearchOps.findDeleted(collective, pageSize))
+      .evalMap(deleteChunk(collective, itemOps, ctx))
+      .repeat
+      .takeWhile(_ > 0)
+      .compile
+      .foldMonoid
+
+  private def deleteChunk[F[_]: Async](
+      collective: Ident,
+      itemOps: OItem[F],
+      ctx: Context[F, _]
+  )(chunk: Vector[RItem]): F[Int] =
+    if (chunk.isEmpty) {
+      0.pure[F]
+    } else {
+      ctx.logger.info(s"Deleting next ${chunk.size} items …") *>
+        chunk.traverse(i =>
+          ctx.logger.debug(s"Delete item ${i.id.id} / ${i.name} now") *>
+            itemOps.deleteItem(i.id, collective)
+        ) *> chunk.size.pure[F]
+    }
+}

modules/store/src/main/scala/docspell/store/records/RItem.scala

@@ -9,6 +9,7 @@ package docspell.store.records
 import cats.data.NonEmptyList
 import cats.effect.Sync
 import cats.implicits._
+import fs2.Stream
 
 import docspell.common._
 import docspell.store.qb.DSL._
@@ -388,6 +389,11 @@ object RItem {
   def findById(itemId: Ident): ConnectionIO[Option[RItem]] =
     run(select(T.all), from(T), T.id === itemId).query[RItem].option
 
+  def findDeleted(collective: Ident, chunkSize: Int): Stream[ConnectionIO, RItem] =
+    run(select(T.all), from(T), T.cid === collective && T.state === ItemState.deleted)
+      .query[RItem]
+      .streamWithChunkSize(chunkSize)
+
   def checkByIdAndCollective(itemId: Ident, coll: Ident): ConnectionIO[Option[Ident]] =
     Select(T.id.s, from(T), T.id === itemId && T.cid === coll).build.query[Ident].option
 

modules/store/src/main/scala/docspell/store/usertask/UserTaskStore.scala

@@ -83,10 +83,10 @@ trait UserTaskStore[F[_]] {
     *
     * Unlike `updateTask`, this ensures that there is at most one task
     * of some name in the db. Multiple same tasks (task with same
-    * name) may not be allowed to run, dependening on what they do.
+    * name) may not be allowed to run, depending on what they do.
     * This is not ensured by the database, though.
     *
-    * If there are currently mutliple tasks with same name as `ut` for
+    * If there are currently multiple tasks with same name as `ut` for
     * the user `account`, they will all be removed and the given task
     * inserted!
     */