module ChannelModes

# File lib/irc_capabilities.rb, line 76
def channel_modes(channel)
  return channel if channel.is_a?(Hash)

  channel.respond_to?(:modes) ? channel.modes : nil
end

# File lib/irc_capabilities.rb, line 49
def format_active_modes(modes)
  parts = []
  %w[m n t i k l r R D d C c p s].each do |flag|
    next unless modes[flag]

    if flag == "l"
      parts << "+l #{modes[flag]}"
    elsif flag == "k"
      parts << "+k"
    else
      parts << "+#{flag.downcase == "r" && modes["R"] ? "R" : flag}"
    end
  end
  parts.empty? ? "(none)" : parts.join(" ")
end

# File lib/irc_capabilities.rb, line 65
def protection_notes(modes)
  notes = []
  notes << "Speech: moderated — only ops and voiced users can talk." if modes["m"]
  notes << "Join: registered X users only (+r)." if modes["r"]
  notes << "Join: invite only (+i)." if modes["i"]
  notes << "Joins hidden until speak/voice (+D)." if modes["D"] || modes["d"]
  return "" if notes.empty?

  notes.join(" ")
end

# File lib/irc_capabilities.rb, line 38
def summary(channel, capabilities: nil)
  modes = channel_modes(channel)
  return "Channel modes: (unknown)" if modes.nil?

  active = format_active_modes(modes)
  lines = ["Channel modes: #{active}"]
  lines << protection_notes(modes)
  lines << FLOATLIM_HINT if capabilities.nil? || capabilities[:isupport]
  lines.join("\n")
end