fetch keys and get objects with pagination

zombie.rb

def fetch_with_pagination(keys, start = 1, count = 50)
  zombies = []
  keys = [] unless keys

  result_count = 1
  keys.each_with_index do |zombie_key, i|
    break if result_count > count
    next if (i + 1) < start

    data = @client['zombies'].get(zombie_key).data
    data["dna"] = data["dna"][0..20] + "..."
    zombies << data
    result_count+=1
  end

  pages = 0
  current_page = 0
  next_index = 0
  prev_index = 0

  if keys.count > 0
    pages = (Float(keys.count) / Float(count)).ceil
    current_page = ((Float(start) / Float(keys.count)) * Float(pages)).ceil
    next_index = ((start + count) > keys.count) ?
        ((pages - 1) * count + 1) : (start + count)
    prev_index = (start == 1) ? 1 : start - count
  end

  {
      :start => start,
      :pages => pages,
      :current_page => current_page,
      :next_index => next_index,
      :prev_index => prev_index,
      :increment => count,
      :total_count => keys.count,
      :zombies => zombies
  }
end

def search_index(index, query)
  @client['zombies'].get_index(index, query)
end