day 4 p2

day4_2.rb

require 'pry'.freeze

values = File.read('input2.txt')

def b_rule(v)
  return true if (1920..2002).include?(v.to_i)
end

def i_rule(v)
  return true if (2010..2020).include?(v.to_i)
end

def e_rule(v)
  (2020..2030).include?(v.to_i)
end

def h_rule(v)
  me, t = v.match(/(\d*)(\D*)/).captures

  return (59..76).include?(me.to_i) if t == 'in'
  return (150..193).include?(me.to_i) if t == 'cm'
  false
end

def hc_rule(v)
  c, _ = v.match(/\#([0-9a-f]*)/i)&.captures

  return false unless c
  c&.length == 6
end

def ec_rule(v)
  %w[amb blu brn gry grn hzl oth].include?(v)
end

def p_rule(v)
  m, _ = v.match(/(\d*)/).captures

  return true if m&.length == 9
end

valid = {
  byr: ->(v) { b_rule(v) },
  iyr: ->(v) { i_rule(v) },
  eyr: ->(v) { e_rule(v) },
  hgt: ->(v) { h_rule(v) },
  hcl: ->(v) { hc_rule(v) },
  ecl: ->(v) { ec_rule(v) },
  pid: ->(v) { p_rule(v) }
}

fff = values.split(/\n\n/).map { |line|
  vi = line.split(/\n/).join(' ').split
  all = vi.map { |e| e.split(':') }.to_h
  all_keys = all.keys - ['cid']
  all.delete('cid')

  (valid.keys - all_keys.map(&:to_sym)).empty? &&
  all.all? do |k, v|
    valid[k.to_sym].call(v)
  end
}

puts fff.count(true)