shitty ruby

def dice_roll(dicestr)
  sets = dicestr.scan(/[0-9]+d[0-9]+/)
  modifier = dicestr.scan(/for \w+ modifier ([+-])(\d+)/)
  if !modifier.empty?
    puts "Modifier is NOT empty\n\n"
    if modifier[0][0] == '-'
      mod = "#{modifier[0][0]}#{modifier[0][1]}".to_i
    else
      mod = "#{modifier[0][1]}".to_i
    end
  else
    puts "Modifier is EMPTY\n\n"
    mod = 0
  end
  puts "The modifier is #{mod}"
  dice = []
  if sets.empty?
    num = dicestr.to_i
    (1..num).each do |n|
      dice.push(rand(6) + 1 + mod)
    end
    return dice
  else
    sets.each do |dset|
      numdice, sizedie = dset.split('d')
      dsetstr = "d#{sizedie}s: "
      dsetstr += (1..numdice.to_i).collect{|x| rand(sizedie.to_i) + 1 + mod}.join(', ')
      dice.push(dsetstr)
    end
    return dice
  end
end