don't publish timeline entries when liking own study

modules/study/src/main/StudyApi.scala

@@ -409,9 +409,10 @@ final class StudyApi(
   def like(studyId: Study.Id, userId: User.ID, v: Boolean, socket: ActorRef, uid: Uid): Funit =
     studyRepo.like(studyId, userId, v) map { likes =>
       sendTo(studyId, Socket.SetLiking(Study.Liking(likes, v), uid))
-      if (v) studyRepo.nameById(studyId) foreach {
-        _ ?? { name =>
-          timeline ! (Propagate(StudyLike(userId, studyId.value, name)) toFollowersOf userId)
+      if (v) studyRepo byId studyId foreach {
+        _ foreach { study =>
+          if (userId != study.ownerId)
+            timeline ! (Propagate(StudyLike(userId, study.id.value, study.name.value)) toFollowersOf userId)
         }
       }
     }

modules/study/src/main/StudyRepo.scala

@@ -27,8 +27,6 @@ final class StudyRepo(private[study] val coll: Coll) {
     implicit cp: CursorProducer[Study]) =
     coll.find(selector).cursor[Study](readPreference)
 
-  def nameById(id: Study.Id) = coll.primitiveOne[String]($id(id), "name")
-
   def exists(id: Study.Id) = coll.exists($id(id))
 
   private[study] def selectOwnerId(ownerId: User.ID) = $doc("ownerId" -> ownerId)