module RegisteredUserNicks

# File lib/registered_user_nicks.rb, line 34
def find_registered_user(nick:, registered_users:, alternative_nicks: DEFAULT_ALTERNATIVE_NICKS)
  nick = Normalize.nick(nick)
  return nil if nick.empty?

  exact = registered_users.find { |user| user.nick.casecmp?(nick) }
  return exact if exact

  registered_users.find do |user|
    patterns_for(user.nick, alternative_nicks: alternative_nicks).any? do |pattern|
      matches_pattern?(nick, pattern)
    end
  end
end

# File lib/registered_user_nicks.rb, line 22
def matches_alternative?(nick, canonical_nick, alternative_nicks: DEFAULT_ALTERNATIVE_NICKS)
  patterns_for(canonical_nick, alternative_nicks: alternative_nicks).any? do |pattern|
    matches_pattern?(nick, pattern)
  end
end

# File lib/registered_user_nicks.rb, line 28
def matches_pattern?(nick, pattern)
  return true if nick.to_s.casecmp?(pattern.to_s)

  NickPattern.match?(nick, pattern)
end

# File lib/registered_user_nicks.rb, line 18
def patterns_for(canonical_nick, alternative_nicks: DEFAULT_ALTERNATIVE_NICKS)
  Array(alternative_nicks[canonical_nick]).map(&:to_s).reject(&:empty?)
end