Ublog: fix lichess rank computation and username in timeline

Previously the username of the person who published the post was used in the propagation to all lichess followers, instead of `lichess`.

Similarly, the rank of the post was using the user blog tier, not lichess

app/controllers/Ublog.scala

@@ -130,11 +130,19 @@ final class Ublog(env: Env) extends LilaController(env):
 
  def update(id: UblogPostId) = AuthBody { ctx ?=> me ?=>
  NotForKids:
- Found(env.ublog.api.findEditableByMe(id)): prev =>
+ Found(
+ env.ublog.api
+ .findEditableByMe(id)
+ .flatMapz: prev =>
+ env.user.repo
+ .byId(prev.created.by)
+ .map: userOpt =>
+ userOpt.map(user => (user, prev))
+ ): (author, prev) =>
  bindForm(env.ublog.form.edit(prev))(
  err => BadRequest.page(views.ublog.form.edit(prev, err)),
  data =>
- env.ublog.api.update(data, prev).flatMap { post =>
+ env.ublog.api.update(author, data, prev).flatMap { post =>
  logModAction(post, "edit").inject(Redirect(urlOfPost(post)).flashSuccess)
  }
  )

modules/ublog/src/main/UblogApi.scala

@@ -30,26 +30,28 @@ final class UblogApi(
 
  def getByPrismicId(id: String): Fu[Option[UblogPost]] = colls.post.one[UblogPost]($doc("prismicId" -> id))
 
- def update(data: UblogForm.UblogPostData, prev: UblogPost)(using me: Me): Fu[UblogPost] =
- getUserBlog(me.value, insertMissing = true).flatMap { blog =>
+ def update(author: User, data: UblogForm.UblogPostData, prev: UblogPost)(using me: Me): Fu[UblogPost] =
+ getUserBlog(author, insertMissing = true).flatMap { blog =>
  val post = data.update(me.value, prev)
  (colls.post.update.one($id(prev.id), $set(bsonWriteObjTry[UblogPost](post).get)) >> {
- (post.live && prev.lived.isEmpty).so(onFirstPublish(me.value, blog, post))
+ (post.live && prev.lived.isEmpty).so(onFirstPublish(author, blog, post))
  }).inject(post)
  }
 
- private def onFirstPublish(user: User, blog: UblogBlog, post: UblogPost): Funit =
+ private def onFirstPublish(author: User, blog: UblogBlog, post: UblogPost): Funit =
  rank
- .computeRank(blog, post)
+ .computeRank(blog.pp("blog"), post)
+ .pp("rank")
  .so: rank =>
  colls.post.updateField($id(post.id), "rank", rank).void
  .andDo:
  lila.common.Bus.publish(UblogPost.Create(post), "ublogPost")
  if blog.visible then
  lila.common.Bus.pub:
- tl.Propagate(tl.UblogPost(user.id, post.id, post.slug, post.title)).toFollowersOf(post.created.by)
- shutupApi.publicText(user.id, post.allText, PublicSource.Ublog(post.id))
- if blog.modTier.isEmpty then sendPostToZulipMaybe(user, post)
+ tl.Propagate(tl.UblogPost(author.id, post.id, post.slug, post.title))
+ .toFollowersOf(post.created.by)
+ shutupApi.publicText(author.id, post.allText, PublicSource.Ublog(post.id))
+ if blog.modTier.isEmpty then sendPostToZulipMaybe(author, post)
 
  def getUserBlog(user: User, insertMissing: Boolean = false): Fu[UblogBlog] =
  getBlog(UblogBlog.Id.User(user.id)).getOrElse(