Set item due date candidate

After processing, set the due date of an item to the first candidate.
The earliest due date is considered best match.

modules/common/src/main/scala/docspell/common/MetaProposal.scala

@@ -1,9 +1,12 @@
 package docspell.common
 
+import cats.implicits._
 import cats.data.NonEmptyList
+import docspell.common._
 import docspell.common.MetaProposal.Candidate
 import io.circe._
 import io.circe.generic.semiauto._
+import java.time.LocalDate
 
 case class MetaProposal(proposalType: MetaProposalType, values: NonEmptyList[Candidate]) {
 
@@ -22,6 +25,12 @@ case class MetaProposal(proposalType: MetaProposalType, values: NonEmptyList[Can
 
 object MetaProposal {
 
+  def parseDate(cand: Candidate): Option[LocalDate] =
+    parseDate(cand.ref.id)
+
+  def parseDate(date: Ident): Option[LocalDate] =
+    Either.catchNonFatal(LocalDate.parse(date.id)).toOption
+
   case class Candidate(ref: IdRef, origin: Set[NerLabel])
   object Candidate {
     implicit val jsonEncoder: Encoder[Candidate] =

modules/common/src/main/scala/docspell/common/MetaProposalType.scala

@@ -18,7 +18,7 @@ object MetaProposalType {
   case object DueDate    extends MetaProposalType
 
   val all: List[MetaProposalType] =
-    List(CorrOrg, CorrPerson, ConcPerson, ConcEquip)
+    List(CorrOrg, CorrPerson, ConcPerson, ConcEquip, DocDate, DueDate)
 
   def fromString(str: String): Either[String, MetaProposalType] =
     str.toLowerCase match {

modules/joex/src/main/scala/docspell/joex/process/EvalProposals.scala

@@ -1,5 +1,6 @@
 package docspell.joex.process
 
+import java.time.{LocalDate, Period}
 import cats.implicits._
 import cats.effect.Sync
 import docspell.common._
@@ -12,54 +13,74 @@ object EvalProposals {
 
   def apply[F[_]: Sync](data: ItemData): Task[F, ProcessItemArgs, ItemData] =
     Task { _ =>
-      val metas = data.metas.map(reorderCandidates)
-      data.copy(metas = metas).pure[F]
+      Timestamp
+        .current[F]
+        .map { now =>
+          val metas = data.metas.map(reorderCandidates(now.toUtcDate))
+          data.copy(metas = metas)
+        }
     }
 
-  def reorderCandidates(rm: RAttachmentMeta): RAttachmentMeta = {
+  def reorderCandidates(now: LocalDate)(rm: RAttachmentMeta): RAttachmentMeta = {
     val list = rm.proposals.getTypes.toList
-      .map(mpt => rm.proposals.find(mpt) match {
-        case Some(mp) =>
-          val v = mp.values.sortBy(weight(rm, mp))
-          Some(mp.copy(values = v))
-        case None =>
-          None
-      })
+      .map(mpt =>
+        rm.proposals.find(mpt) match {
+          case Some(mp) =>
+            val v = mp.values.sortBy(weight(rm, mp, now))
+            Some(mp.copy(values = v))
+          case None =>
+            None
+        }
+      )
 
     rm.copy(proposals = MetaProposalList(list.flatMap(identity)))
   }
 
-  def weight(rm: RAttachmentMeta, mp: MetaProposal)(cand: MetaProposal.Candidate): Double = {
-    val textLen = rm.content.map(_.length).getOrElse(0)
-    val tagCount = cand.origin.size.toDouble
-    val pos = cand.origin.map(_.startPosition).min
-    val words = cand.origin.map(_.label.split(' ').length).max.toDouble
-    val nerFac = cand.origin.map(label => nerTagFactor(label.tag, mp.proposalType)).min
-    (1 / words) * (1 / tagCount) * positionWeight(pos, textLen) * nerFac
-  }
+  def weight(rm: RAttachmentMeta, mp: MetaProposal, ref: LocalDate)(
+      cand: MetaProposal.Candidate
+  ): Double =
+    mp.proposalType match {
+      case MetaProposalType.DueDate =>
+        //for due dates, sort earliest on top
+        MetaProposal
+          .parseDate(cand)
+          .map { ld =>
+            val p = Period.between(ref, ld)
+            // conversion only for sorting
+            val d = p.getYears * 365 + p.getMonths * 31 + p.getDays
+            d.toDouble
+          }
+          .getOrElse(2000.0)
+      case _ =>
+        val textLen  = rm.content.map(_.length).getOrElse(0)
+        val tagCount = cand.origin.size.toDouble
+        val pos      = cand.origin.map(_.startPosition).min
+        val words    = cand.origin.map(_.label.split(' ').length).max.toDouble
+        val nerFac =
+          cand.origin.map(label => nerTagFactor(label.tag, mp.proposalType)).min
+        (1 / words) * (1 / tagCount) * positionWeight(pos, textLen) * nerFac
+    }
 
-  def positionWeight(pos: Int, total: Int): Double = {
+  def positionWeight(pos: Int, total: Int): Double =
     if (total <= 0) 1
     else {
       val p = math.abs(pos.toDouble / total.toDouble)
       if (p < 0.7) p / 2
       else p
     }
-  }
-
 
   def nerTagFactor(tag: NerTag, mt: MetaProposalType): Double =
     tag match {
-      case NerTag.Date => 1.0
-      case NerTag.Email => 0.5
+      case NerTag.Date     => 1.0
+      case NerTag.Email    => 0.5
       case NerTag.Location => 1.0
-      case NerTag.Misc => 1.0
+      case NerTag.Misc     => 1.0
       case NerTag.Organization =>
         if (mt == MetaProposalType.CorrOrg) 0.8
         else 1.0
       case NerTag.Person =>
         if (mt == MetaProposalType.CorrPerson ||
-          mt == MetaProposalType.ConcPerson) 0.8
+            mt == MetaProposalType.ConcPerson) 0.8
         else 1.0
       case NerTag.Website => 0.5
     }

modules/joex/src/main/scala/docspell/joex/process/LinkProposal.scala

@@ -50,20 +50,38 @@ object LinkProposal {
     mpt match {
       case MetaProposalType.CorrOrg =>
         ctx.logger.debug(s"Updating item organization with: ${value.id}") *>
-          ctx.store.transact(RItem.updateCorrOrg(itemId, ctx.args.meta.collective, Some(value)))
+          ctx.store.transact(
+            RItem.updateCorrOrg(itemId, ctx.args.meta.collective, Some(value))
+          )
       case MetaProposalType.ConcPerson =>
         ctx.logger.debug(s"Updating item concerning person with: $value") *>
-          ctx.store.transact(RItem.updateConcPerson(itemId, ctx.args.meta.collective, Some(value)))
+          ctx.store.transact(
+            RItem.updateConcPerson(itemId, ctx.args.meta.collective, Some(value))
+          )
       case MetaProposalType.CorrPerson =>
         ctx.logger.debug(s"Updating item correspondent person with: $value") *>
-          ctx.store.transact(RItem.updateCorrPerson(itemId, ctx.args.meta.collective, Some(value)))
+          ctx.store.transact(
+            RItem.updateCorrPerson(itemId, ctx.args.meta.collective, Some(value))
+          )
       case MetaProposalType.ConcEquip =>
         ctx.logger.debug(s"Updating item concerning equipment with: $value") *>
-          ctx.store.transact(RItem.updateConcEquip(itemId, ctx.args.meta.collective, Some(value)))
+          ctx.store.transact(
+            RItem.updateConcEquip(itemId, ctx.args.meta.collective, Some(value))
+          )
       case MetaProposalType.DocDate =>
         ctx.logger.debug(s"Not linking document date suggestion ${value.id}").map(_ => 0)
       case MetaProposalType.DueDate =>
-        ctx.logger.debug(s"Not linking document date suggestion ${value.id}").map(_ => 0)
+        MetaProposal.parseDate(value) match {
+          case Some(ld) =>
+            val ts = Timestamp.from(ld.atStartOfDay(Timestamp.UTC))
+            ctx.logger.debug(s"Updating item due-date suggestion ${value.id}") *>
+              ctx.store.transact(
+                RItem.updateDueDate(itemId, ctx.args.meta.collective, Some(ts))
+              )
+          case None =>
+            ctx.logger.info(s"Cannot read value '${value.id}' into a date.") *>
+              0.pure[F]
+        }
     }
 
   sealed trait Result {