Add latvian language

modules/analysis/src/main/scala/docspell/analysis/date/DateFind.scala

@@ -17,6 +17,7 @@ object DateFind {
   def findDates(text: String, lang: Language): Stream[Pure, NerDateLabel] =
     TextSplitter
       .splitToken(text, " \t.,\n\r/".toSet)
+      .filter(w => lang != Language.Latvian || w.value != "gada")
       .sliding(3)
       .filter(_.length == 3)
       .flatMap(q =>
@@ -55,6 +56,10 @@ object DateFind {
       case ((m, d), y) =>
         List(SimpleDate(y, m, d))
     }
+    def lavLong =
+      (readYear >> readDay >> readMonth(Language.Latvian)).map { case ((y, d), m) =>
+        List(SimpleDate(y, m, d))
+      }
 
     // ymd ✔, ydm, dmy ✔, dym, myd, mdy ✔
     def fromParts(parts: List[Word], lang: Language): List[SimpleDate] = {
@@ -77,6 +82,7 @@ object DateFind {
         case Language.Russian    => dmy.or(ymd).or(mdy)
         case Language.Swedish    => ymd.or(dmy).or(mdy)
         case Language.Dutch      => dmy.or(ymd).or(mdy)
+        case Language.Latvian    => dmy.or(lavLong).or(ymd)
       }
       p.read(parts) match {
         case Result.Success(sds, _) =>

modules/analysis/src/main/scala/docspell/analysis/date/MonthName.scala

@@ -42,6 +42,8 @@ object MonthName {
         finnish
       case Language.Russian =>
         russian
+      case Language.Latvian =>
+        latvian
     }
 
   private val numbers = List(
@@ -267,4 +269,19 @@ object MonthName {
     List("nov", "november"),
     List("dec", "december")
   )
+
+  private val latvian = List(
+    List("janvāris", "janv."),
+    List("februāris", "febr."),
+    List("marts"),
+    List("aprīlis", "apr."),
+    List("maijs"),
+    List("jūnijs", "jūn."),
+    List("jūlijs", "jūl."),
+    List("augusts", "aug."),
+    List("septembris", "sept."),
+    List("oktobris", "okt."),
+    List("novembris", "nov."),
+    List("decembris", "dec.")
+  )
 }

modules/analysis/src/test/scala/docspell/analysis/date/DateFindSpec.scala

@@ -103,4 +103,36 @@ object DateFindSpec extends SimpleTestSuite {
     )
   }
 
+  test("find latvian dates") {
+    assertEquals(
+      DateFind.findDates("on 2020. gada 30. jūlijs there", Language.Latvian).toVector,
+      Vector(
+        NerDateLabel(
+          LocalDate.of(2020, 7, 30),
+          NerLabel("2020. gada 30. jūlijs", NerTag.Date, 3, 24)
+        )
+      )
+    )
+    assertEquals(
+      DateFind.findDates("Lai gan 30.07.2020", Language.Latvian).toVector,
+      Vector(
+        NerDateLabel(
+          LocalDate.of(2020, 7, 30),
+          NerLabel("30.07.2020", NerTag.Date, 8, 18)
+        )
+      )
+    )
+    assertEquals(
+      DateFind
+        .findDates("Es nevaru šodien 2020.gada 30.oktobris iet uz", Language.Latvian)
+        .toVector,
+      Vector(
+        NerDateLabel(
+          LocalDate.of(2020, 10, 30),
+          NerLabel("2020.gada 30.oktobris", NerTag.Date, 17, 38)
+        )
+      )
+    )
+  }
+
 }