blog search is pretty much unusable

[ornicar]

https://lichess.org/blog/search?text=puzzle

Most results are garbage posts - and most of their authors have closed their accounts, which makes the blog post unreachable.

For blog search to work, it looks like we need

1. to make the default "score" sorting account for blog post quality, i.e. likes.
2. to synchronize blog post visibility between lila and lila-search. It depends on user status and blog status

[dav1312]

What about

https://github.com/lichess-org/lila/blob/e1227d6ddbdb248b2d83a6b8f27c12ef48c55d16/modules/ublog/src/main/UblogApi.scala#L374-L377

Something like

def postPreviews(ids: Seq[UblogPostId]): Future[Seq[UblogPost.PreviewPost]] = ids.nonEmpty.so:
  colls.post.aggregateList(ids.size, _.sec): framework =>
    import framework.*
    Match($inIds(ids) ++ $doc("live" -> true)) ->
      removeUnlistedOrClosedAndProjectForPreview(colls.post, framework)
  .map: results =>
    ids.flatMap(results.mapBy(_.id).get)