excalidraw の部屋の URL をつくるときの支援スクリプト

excalidraw-room.rb

require 'digest/sha1'

def room_id(name)
  digest = Digest::SHA1.new
  digest.update(name)
  digest.hexdigest.slice(0,20)
end

def encryption_key(seed)
  alphabets = ('a'..'z')
  capital_alphabets = ('A'..'Z')
  numbers = 0..9
  marks = %w( _ - )
  (alphabets.to_a + capital_alphabets.to_a + numbers.to_a + marks).shuffle(random: Random.new(seed)).slice(0, 22).join
end

name = ARGV.shift
pass_number = ARGV.shift.to_i

puts "https://excalidraw.com/#room=#{room_id(name)},#{encryption_key(pass_number)}"

exit(0)