forum post redirection url

app/controllers/ForumPost.scala

@@ -44,4 +44,11 @@ object ForumPost extends LilaController with ForumController {
     me ⇒
       postApi.delete(id, me)
   }
+
+  def redirect(id: String) = Open { implicit ctx ⇒
+    OptionResult(postApi.urlData(id, ctx.troll)) {
+      case lila.forum.PostUrlData(categ, topic, page, number) ⇒
+        Redirect(routes.ForumTopic.show(categ, topic, page).url + "#" + number)
+    }
+  }
 }

conf/routes

@@ -151,6 +151,7 @@ GET   /forum/:categSlug/:slug          controllers.ForumTopic.show(categSlug: St
 POST  /forum/:categSlug/:slug/close    controllers.ForumTopic.close(categSlug: String, slug: String)
 POST  /forum/:categSlug/:slug/new      controllers.ForumPost.create(categSlug: String, slug: String, page: Int ?= 1)
 POST  /forum/delete/post/:id           controllers.ForumPost.delete(id: String)
+GET   /forum/redirect/post/:id         controllers.ForumPost.redirect(id: String)
  
 # Message
 GET   /inbox                           controllers.Message.inbox(page: Int ?= 1)

modules/forum/src/main/PostApi.scala

@@ -47,6 +47,14 @@ final class PostApi(
         }) inject post
     }
 
+  def urlData(postId: String, troll: Boolean): Fu[Option[PostUrlData]] = get(postId) flatMap {
+    case Some((topic, post)) if (!troll && post.troll) => fuccess(none[PostUrlData])
+    case Some((topic, post)) => PostRepo(troll).countBeforeNumber(topic.id, post.number) map { nb =>
+      val page = nb / maxPerPage + 1
+      PostUrlData(topic.categId, topic.slug, page, post.number).some
+    }
+  }
+
   def get(postId: String): Fu[Option[(Topic, Post)]] = for {
     post ← optionT($find.byId[Post](postId))
     topic ← optionT($find.byId[Topic](post.topicId))

modules/forum/src/main/PostRepo.scala

@@ -20,6 +20,9 @@ sealed abstract class PostRepo(troll: Boolean) {
     Json.obj("troll" -> false)
   )
 
+  def countBeforeNumber(topicId: String, number: Int): Fu[Int] = 
+    $count(selectTopic(topicId) ++ Json.obj("number" -> $lt(number)))
+
   def isFirstPost(topicId: String, postId: String): Fu[Boolean] =
     $primitive.one(
       selectTopic(topicId),

modules/forum/src/main/views.scala

@@ -42,3 +42,5 @@ case class PostView(
 }
 
 case class PostLiteView(post: Post, topic: Topic, topicLastPage: Int)
+
+case class PostUrlData(categ: String, topic: String, page: Int, number: Int)

modules/forumSearch/src/main/Post.scala

@@ -33,7 +33,7 @@ private[forumSearch] object Post {
   def from(view: PostLiteView): JsObject = Json.obj(
     body -> view.post.text,
     topic -> view.topic.name,
-    author -> ~(view.post.userId orElse view.post.author),
+    author -> ~(view.post.userId orElse view.post.author map (_.toLowerCase)),
     topicId -> view.topic.id,
     staff -> view.post.isStaff,
     troll -> view.post.troll