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 | require 'socket'
module Dinobot
  class Bot
    def initialize(server, port, nick, pass=nil, &block)
      @server = server
      @port = port
      @nick = nick
      @pass = pass
      @trigger = '!'
      @socket = nil
      @modules = Hash.new
      @channels = Array.new
      instance_eval(&block) if block_given?
    end
    def connect
      @socket = TCPSocket.new(@server, @port)
      out "PASS #{@pass}" if @pass
      out "NICK #{@nick}"
      out "USER #{@nick} 0 * :#{@nick}"
      @channels.each do |channel|
        join channel
      end
    end
    def connected?
      !(@socket.nil? || @socket.closed?)
    end
    def run
      while true
        puts "== Connecting to #{@server}:#{@port}."
        connect
        while str = @socket.gets
          str.chomp!
          puts "<< " + str.inspect
          begin
            parse_line(str)
          rescue
          end
        end
        puts "== Disconnected."
        @socket.close
      end
    end
    def parse_line(str)
      out str.sub('PING', 'PONG') if str =~ /^PING /
      if str =~ /(\S+) PRIVMSG (\S+) :(.*)/
        user, channel, message = str.scan(/(\S+) PRIVMSG (\S+) :(.*)/).first
        if message =~ /^#{Regexp.escape(@trigger)}/
          message.sub!(@trigger, '')
          mod = message.split.first.downcase.intern
          if @modules.has_key?(mod)
            exec_commands(@modules[mod].call(user, channel, message))
          end
        end
      end
    end
    def exec_commands(commands)
      commands.each do |command|
        case command.first
        when :say
          send(*command) if command.length == 3
        when :join, :part
          send(*command) if command.length == 2
        end
      end
    end
    def out(str)
      return unless connected?
      puts ">> " + str.inspect
      @socket.puts str
    end
    def say(channel, message)
      out "PRIVMSG #{channel} :#{message}"
    end
    def join(channel)
      @channels << channel unless @channels.include?(channel)
      out "JOIN #{channel}"
    end
    def part(channel)
      @channels.delete(channel)
      out "PART #{channel}"
    end
    def load_module(mod)
      mod = mod.downcase.intern
      puts "== Loading module: #{mod}"
      file = "#{mod}.rb"
      begin
        load file
        m = Dinobot.const_get(Dinobot.constants.find { |x| x.downcase == mod })
        @modules[mod] = m.new
        puts "== Loaded module: #{mod} (#{m})"
      rescue LoadError, StandardError => e
        puts "== Failed to load module: #{mod} (#{e.message})"
      end
    end
    def unload_module(mod)
      mod = mod.downcase.intern
      puts "== Unloading module: #{mod}"
      unless @modules.has_key?(mod)
        puts "== Failed to unload module: #{mod} (module not loaded)"
        return
      end
      @modules.delete(mod)
      Dinobot.send(
        :remove_const,
        Dinobot.constants.find { |x| x.downcase == mod }
      )
    end
  end
end
 |