text = <<~DOC
ID        Name                                                    Type   Size      Date
735557379 Mitch Murder - Kung Fury (Lost Tapes) - 2015            FOLDER 38.37 MB  8 months ago
589243897 A Game Of Thrones ~ Books 1-5 EPUB,MOBI & PDF [GrYff0N] FOLDER 83.36 MB  2 years ago
735557525 VA - Kung Fury (2015)                                   FOLDER 109.84 MB 8 months ago
819683233 19000                                                   FOLDER 1.77 GB   2 days ago
819682329 18000                                                   FOLDER 3.12 GB   2 days ago
819681592 17000                                                   FOLDER 4.23 GB   2 days ago
784060241 Doctor.Who.2005.S12.1080p.BluRay.x264-SHORTBREHD        FOLDER 31.73 GB  2 months ago
601795129 chill.institute                                         FOLDER 51.66 GB  2 days ago
DOC

def parse_fields(str:, hash_result: false, row_sep: "\n")
  rows = str.split(row_sep)
  header = rows.shift.scan(/\w+\s+/)
  col_widths = header.map(&:length)

  header.map!(&:strip)
  acc_index_memo = {}

  rows.map! do |r|
    result = []

    col_widths.each_with_index { |w, i|
      start_index = i > 0 ? acc_index_memo[i] ||= col_widths.slice(0, i).inject(:+) : 0
      result << r[start_index, w].strip
    }

    result
  end

  hash_result ? rows.map {|r| Hash[header.zip(r)] } : rows
end


parse_fields(str: text)
parse_fields(str: text, hash_result: true)
parse_fields(str: text, hash_result: true, row_sep: /\R/)