# frozen_string_literal: true

module Answer::TimelineMethods
  include CursorPaginatable

  define_cursor_paginator :cursored_public_timeline, :public_timeline

  def public_timeline(current_user: nil)
    joins(:user)
      .then do |query|
        next query unless current_user

        blocked_and_muted_user_ids = current_user.blocked_user_ids_cached + current_user.muted_user_ids_cached
        next query if blocked_and_muted_user_ids.empty?

        # build a more complex query if we block or mute someone
        # otherwise the query ends up as "anon OR (NOT anon AND user_id NOT IN (NULL))" which will only return anonymous questions
        query
          .joins(:question)
          .where("questions.author_is_anonymous OR (NOT questions.author_is_anonymous AND questions.user_id NOT IN (?))", blocked_and_muted_user_ids)
          .where.not(answers: { user_id: blocked_and_muted_user_ids })
      end
      .where(users: { privacy_allow_public_timeline: true })
      .order(:created_at)
      .reverse_order
  end
end