Added support for changelog

app/models/Change.scala

@@ -0,0 +1,38 @@
+package models
+
+import java.time.LocalTime
+
+import models.profile.MappedJdbcType
+import models.profile.api._
+import models.jodaSupport._
+import models.profile.api._
+import org.joda.time.{DateTime, LocalDate}
+import play.api.data.Form
+import slick.lifted.{ProvenShape, Tag}
+
+
+object Change {
+  abstract sealed class Direction private[Change] (private[Change] val description: String)
+  object Direction{
+    object Added extends Direction("added")
+    object Removed extends Direction("removed")
+    val All = Set(Added, Removed)
+    val ByName = All.map(x => x.description -> x).toMap
+    implicit val TypeMapper = MappedJdbcType.base[Direction, String](_.description, ByName)
+  }
+
+}
+
+case class Change (time: DateTime, vulnerabilityName: String, projectName: String, direction: Change.Direction)
+
+class Changes(tag: Tag) extends Table[(Int, Change)](tag, "change"){
+  def id = column[Int]("id", O.PrimaryKey, O.AutoInc)
+  import Change.Direction.TypeMapper
+  def time = column[DateTime]("time")
+  def vulnerabilityName = column[String]("vulnerability_name")
+  def projectName = column[String]("project_name")
+  def direction = column[Change.Direction]("direction")
+
+  def base = (time, vulnerabilityName, projectName, direction) <> ((Change.apply _).tupled, Change.unapply)
+  override def * = (id, base)
+}