add mod messages to mod log and user moderation history

app/controllers/Message.scala

@@ -79,6 +79,7 @@ object Message extends LilaController {
         html = forms.thread(me).bindFromRequest.fold(
           err => renderForm(me, none, _ => err) map { BadRequest(_) },
           data => api.makeThread(data, me) map { thread =>
+            if (thread.asMod) Env.mod.logApi.modMessage(thread.creatorId, thread.invitedId, thread.name)
             Redirect(routes.Message.thread(thread.id))
           }
         ),

modules/mod/src/main/Modlog.scala

@@ -40,6 +40,7 @@ case class Modlog(
     case Modlog.untroll => "un-shadowban"
     case Modlog.permissions => "set permissions"
     case Modlog.kickFromRankings => "kick from rankings"
+    case Modlog.modMessage => "send message"
     case a => a
   }
 
@@ -77,4 +78,5 @@ object Modlog {
   val terminateTournament = "terminateTournament "
   val chatTimeout = "chatTimeout "
   val kickFromRankings = "kickFromRankings"
+  val modMessage = "modMessage"
 }

modules/mod/src/main/ModlogApi.scala

@@ -103,6 +103,10 @@ final class ModlogApi(coll: Coll) {
     Modlog(mod, user.some, Modlog.kickFromRankings)
   }
 
+  def modMessage(mod: String, user: String, subject: String) = add {
+    Modlog(mod, user.some, Modlog.modMessage, details = subject.some)
+  }
+
   def recent = coll.find($empty).sort($sort naturalDesc).cursor[Modlog]().gather[List](100)
 
   def wasUnengined(userId: String) = coll.exists($doc(