How to create a query to load all posts and theirs each counted likes with the user id liked or not

Hello, I want to load all posts of my database and count each record likes with group_by and finally I need each user enters to my site, check the user is seeing this records if liked or not , then show a parameter in my select true or false.

my current query I have written

from(post in Post,
      join: cat in assoc(post, :blog_categories),
      left_join: like in assoc(post, :blog_likes)
      group_by: [post.id, cat.id, like.post_id],
      select: %{
        title: post.title,
        category_title: cat.title,
        like_count: count(like.id)
      }
    )

but I need a select like this:

select: %{
  title: post.title,
  category_title: cat.title,
  like_count: count(like.id),
  user_liked: true
}

I do not want to filter my records with where, because I need to load all of those, I just need to know if my user like this post or not like twitter when you like a tweet the heart icon fill with red color

Screen Shot 1400-05-03 at 18.30.00850×525 39.7 KB

my relations:

posts -> likes
categories -> posts
users -> likes