Add Reader & Writer for UUID (#114)

* Add UUIDWriter & UUIDReader

* Bump version

build.sbt

@@ -15,7 +15,8 @@ lazy val `teleproto` =
     .settings(Project.inConfig(Test)(sbtprotoc.ProtocPlugin.protobufConfigSettings): _*)
     .settings(
       name := "teleproto",
-      version := "1.11.0",
+      version := "1.12.0",
+      versionScheme := Some("early-semver"),
       libraryDependencies ++= Seq(
         library.scalaPB            % "protobuf;compile",
         library.scalaPBJson        % Compile,

src/main/scala/io/moia/protos/teleproto/Reader.scala

@@ -17,11 +17,11 @@
 package io.moia.protos.teleproto
 
 import java.time.{Instant, LocalTime}
-
 import com.google.protobuf.duration.{Duration => PBDuration}
 import com.google.protobuf.timestamp.Timestamp
 import scalapb.GeneratedMessage
 
+import java.util.UUID
 import scala.annotation.implicitNotFound
 import scala.collection.compat._
 import scala.collection.immutable.TreeMap
@@ -160,6 +160,13 @@ object Reader extends LowPriorityReads {
       PbSuccess((Duration(protobuf.seconds, SECONDS) + Duration(protobuf.nanos.toLong, NANOSECONDS)).toCoarsest)
   }
 
+  /**
+    * Transforms a string into a UUID.
+    */
+  implicit object UUIDReader extends Reader[String, UUID] {
+    def read(uuid: String): PbResult[UUID] = Try(PbSuccess(UUID.fromString(uuid))).getOrElse(PbFailure("Value must be a UUID."))
+  }
+
   /**
     * Transforms a PB timestamp as fixed point in time (with milliseconds precision) into a Scala concurrent deadline.
     *

src/main/scala/io/moia/protos/teleproto/Writer.scala

@@ -20,6 +20,7 @@ import com.google.protobuf.duration.{Duration => PBDuration}
 import com.google.protobuf.timestamp.Timestamp
 
 import java.time.{Instant, LocalTime}
+import java.util.UUID
 import scala.annotation.implicitNotFound
 import scala.collection.compat._
 import scala.collection.immutable.TreeMap
@@ -129,6 +130,13 @@ object Writer extends LowPriorityWrites {
       PBDuration(duration.toSeconds, (duration.toNanos % 1000000000).toInt)
   }
 
+  /**
+    * Writes a UUID as string.
+    */
+  implicit object UUIDWriter extends Writer[UUID, String] {
+    def write(uuid: UUID): String = uuid.toString
+  }
+
   /**
     * Writes a Scala deadline into a ScalaPB Timestamp as fixed point in time.
     *