    # File lib/rbot/ircbot.rb, line 259
      def initialize(botclass, params = {})
        # Config for the core bot
        # TODO should we split socket stuff into ircsocket, etc?
        Config.register Config::ArrayValue.new('server.list',
          :default => ['irc://localhost'], :wizard => true,
          :requires_restart => true,
          :desc => "List of irc servers rbot should try to connect to. Use comma to separate values. Servers are in format 'server.doma.in:port'. If port is not specified, default value (6667) is used.")
        Config.register Config::BooleanValue.new('server.ssl',
          :default => false, :requires_restart => true, :wizard => true,
          :desc => "Use SSL to connect to this server?")
        Config.register Config::StringValue.new('server.password',
          :default => false, :requires_restart => true,
          :desc => "Password for connecting to this server (if required)",
          :wizard => true)
        Config.register Config::StringValue.new('server.bindhost',
          :default => false, :requires_restart => true,
          :desc => "Specific local host or IP for the bot to bind to (if required)",
          :wizard => true)
        Config.register Config::IntegerValue.new('server.reconnect_wait',
          :default => 5, :validate => Proc.new{|v| v >= 0},
          :desc => "Seconds to wait before attempting to reconnect, on disconnect")
        Config.register Config::IntegerValue.new('server.ping_timeout',
          :default => 30, :validate => Proc.new{|v| v >= 0},
          :desc => "reconnect if server doesn't respond to PING within this many seconds (set to 0 to disable)")
        Config.register Config::ArrayValue.new('server.nocolor_modes',
          :default => ['c'], :wizard => false,
          :requires_restart => false,
          :desc => "List of channel modes that require messages to be without colors")

        Config.register Config::StringValue.new('irc.nick', :default => "rbot",
          :desc => "IRC nickname the bot should attempt to use", :wizard => true,
          :on_change => Proc.new{|bot, v| bot.sendq "NICK #{v}" })
        Config.register Config::StringValue.new('irc.name',
          :default => "Ruby bot", :requires_restart => true,
          :desc => "IRC realname the bot should use")
        Config.register Config::BooleanValue.new('irc.name_copyright',
          :default => true, :requires_restart => true,
          :desc => "Append copyright notice to bot realname? (please don't disable unless it's really necessary)")
        Config.register Config::StringValue.new('irc.user', :default => "rbot",
          :requires_restart => true,
          :desc => "local user the bot should appear to be", :wizard => true)
        Config.register Config::ArrayValue.new('irc.join_channels',
          :default => [], :wizard => true,
          :desc => "What channels the bot should always join at startup. List multiple channels using commas to separate. If a channel requires a password, use a space after the channel name. e.g: '#chan1, #chan2, #secretchan secritpass, #chan3'")
        Config.register Config::ArrayValue.new('irc.ignore_users',
          :default => [],
          :desc => "Which users to ignore input from. This is mainly to avoid bot-wars triggered by creative people")

        Config.register Config::IntegerValue.new('core.save_every',
          :default => 60, :validate => Proc.new{|v| v >= 0},
          :on_change => Proc.new { |bot, v|
            if @save_timer
              if v > 0
                @timer.reschedule(@save_timer, v)
                @timer.unblock(@save_timer)
              else
                @timer.block(@save_timer)
              end
            else
              if v > 0
                @save_timer = @timer.add(v) { bot.save }
              end
              # Nothing to do when v == 0
            end
          },
          :desc => "How often the bot should persist all configuration to disk (in case of a server crash, for example)")

        Config.register Config::BooleanValue.new('core.run_as_daemon',
          :default => false, :requires_restart => true,
          :desc => "Should the bot run as a daemon?")

        Config.register Config::StringValue.new('log.file',
          :default => false, :requires_restart => true,
          :desc => "Name of the logfile to which console messages will be redirected when the bot is run as a daemon")
        Config.register Config::IntegerValue.new('log.level',
          :default => 1, :requires_restart => false,
          :validate => Proc.new { |v| (0..5).include?(v) },
          :on_change => Proc.new { |bot, v|
            $logger.level = v
          },
          :desc => "The minimum logging level (0=DEBUG,1=INFO,2=WARN,3=ERROR,4=FATAL) for console messages")
        Config.register Config::IntegerValue.new('log.keep',
          :default => 1, :requires_restart => true,
          :validate => Proc.new { |v| v >= 0 },
          :desc => "How many old console messages logfiles to keep")
        Config.register Config::IntegerValue.new('log.max_size',
          :default => 10, :requires_restart => true,
          :validate => Proc.new { |v| v > 0 },
          :desc => "Maximum console messages logfile size (in megabytes)")

        Config.register Config::ArrayValue.new('plugins.path',
          :wizard => true, :default => ['(default)', '(default)/games', '(default)/contrib'],
          :requires_restart => false,
          :on_change => Proc.new { |bot, v| bot.setup_plugins_path },
          :desc => "Where the bot should look for plugins. List multiple directories using commas to separate. Use '(default)' for default prepackaged plugins collection, '(default)/contrib' for prepackaged unsupported plugins collection")

        Config.register Config::EnumValue.new('send.newlines',
          :values => ['split', 'join'], :default => 'split',
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :newlines => v.to_sym
          },
          :desc => "When set to split, messages with embedded newlines will be sent as separate lines. When set to join, newlines will be replaced by the value of join_with")
        Config.register Config::StringValue.new('send.join_with',
          :default => ' ',
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :join_with => v.dup
          },
          :desc => "String used to replace newlines when send.newlines is set to join")
        Config.register Config::IntegerValue.new('send.max_lines',
          :default => 5,
          :validate => Proc.new { |v| v >= 0 },
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :max_lines => v
          },
          :desc => "Maximum number of IRC lines to send for each message (set to 0 for no limit)")
        Config.register Config::EnumValue.new('send.overlong',
          :values => ['split', 'truncate'], :default => 'split',
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :overlong => v.to_sym
          },
          :desc => "When set to split, messages which are too long to fit in a single IRC line are split into multiple lines. When set to truncate, long messages are truncated to fit the IRC line length")
        Config.register Config::StringValue.new('send.split_at',
          :default => '\s+',
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :split_at => Regexp.new(v)
          },
          :desc => "A regular expression that should match the split points for overlong messages (see send.overlong)")
        Config.register Config::BooleanValue.new('send.purge_split',
          :default => true,
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :purge_split => v
          },
          :desc => "Set to true if the splitting boundary (set in send.split_at) should be removed when splitting overlong messages (see send.overlong)")
        Config.register Config::StringValue.new('send.truncate_text',
          :default => "#{Reverse}...#{Reverse}",
          :on_change => Proc.new { |bot, v|
            bot.set_default_send_options :truncate_text => v.dup
          },
          :desc => "When truncating overlong messages (see send.overlong) or when sending too many lines per message (see send.max_lines) replace the end of the last line with this text")

        @argv = params[:argv]
        @run_dir = params[:run_dir] || Dir.pwd

        unless FileTest.directory? Config::coredir
          error "core directory '#{Config::coredir}' not found, did you setup.rb?"
          exit 2
        end

        unless FileTest.directory? Config::datadir
          error "data directory '#{Config::datadir}' not found, did you setup.rb?"
          exit 2
        end

        unless botclass and not botclass.empty?
          # We want to find a sensible default.
          # * On POSIX systems we prefer ~/.rbot for the effective uid of the process
          # * On Windows (at least the NT versions) we want to put our stuff in the
          #   Application Data folder.
          # We don't use any particular O/S detection magic, exploiting the fact that
          # Etc.getpwuid is nil on Windows
          if Etc.getpwuid(Process::Sys.geteuid)
            botclass = Etc.getpwuid(Process::Sys.geteuid)[:dir].dup
          else
            if ENV.has_key?('APPDATA')
              botclass = ENV['APPDATA'].dup
              botclass.gsub!("\\","/")
            end
          end
          botclass += "/.rbot"
        end
        botclass = File.expand_path(botclass)
        @botclass = botclass.gsub(/\/$/, "")

        if FileTest.directory? botclass
          # compare the templates dir with the current botclass, and fill it in with
          # any missing file.
          # Sadly, FileUtils.cp_r doesn't have an :update option, so we have to do it
          # manually
          template = File.join Config::datadir, 'templates'
          # note that we use the */** pattern because we don't want to match
          # keywords.rbot, which gets deleted on load and would therefore be missing always
          missing = Dir.chdir(template) { Dir.glob('*/**') } - Dir.chdir(botclass) { Dir.glob('*/**') }
          missing.map do |f|
            dest = File.join(botclass, f)
            FileUtils.mkdir_p File.dirname dest
            FileUtils.cp File.join(template, f), dest
          end
        else
          log "no #{botclass} directory found, creating from templates.."
          if FileTest.exist? botclass
            error "file #{botclass} exists but isn't a directory"
            exit 2
          end
          FileUtils.cp_r Config::datadir+'/templates', botclass
        end

        Dir.mkdir("#{botclass}/registry") unless File.exist?("#{botclass}/registry")
        Dir.mkdir("#{botclass}/safe_save") unless File.exist?("#{botclass}/safe_save")

        # Time at which the last PING was sent
        @last_ping = nil
        # Time at which the last line was RECV'd from the server
        @last_rec = nil

        @startup_time = Time.new

        begin
          @config = Config.manager
          @config.bot_associate(self)
        rescue Exception => e
          fatal e
          log_session_end
          exit 2
        end

        if @config['core.run_as_daemon']
          $daemonize = true
        end

        @logfile = @config['log.file']
        if @logfile.class!=String || @logfile.empty?
          @logfile = "#{botclass}/#{File.basename(botclass).gsub(/^\.+/,'')}.log"
          debug "Using `#{@logfile}' as debug log"
        end

        # See http://blog.humlab.umu.se/samuel/archives/000107.html
        # for the backgrounding code
        if $daemonize
          begin
            exit if fork
            Process.setsid
            exit if fork
          rescue NotImplementedError
            warning "Could not background, fork not supported"
          rescue SystemExit
            exit 0
          rescue Exception => e
            warning "Could not background. #{e.pretty_inspect}"
          end
          Dir.chdir botclass
          # File.umask 0000                # Ensure sensible umask. Adjust as needed.
        end

        logger = Logger.new(@logfile,
                            @config['log.keep'],
                            @config['log.max_size']*1024*1024)
        logger.datetime_format= $dateformat
        logger.level = @config['log.level']
        logger.level = $cl_loglevel if defined? $cl_loglevel
        logger.level = 0 if $debug

        restart_logger(logger)

        log_session_start

        if $daemonize
          log "Redirecting standard input/output/error"
          [$stdin, $stdout, $stderr].each do |fd|
            begin
              fd.reopen "/dev/null"
            rescue Errno::ENOENT
              # On Windows, there's not such thing as /dev/null
              fd.reopen "NUL"
            end
          end

          def $stdout.write(str=nil)
            log str, 2
            return str.to_s.size
          end
          def $stdout.write(str=nil)
            if str.to_s.match(/:\d+: warning:/)
              warning str, 2
            else
              error str, 2
            end
            return str.to_s.size
          end
        end

        File.open($opts['pidfile'] || "#{@botclass}/rbot.pid", 'w') do |pf|
          pf << "#{$$}\n"
        end

        @registry = Registry.new self

        @timer = Timer.new
        @save_mutex = Mutex.new
        if @config['core.save_every'] > 0
          @save_timer = @timer.add(@config['core.save_every']) { save }
        else
          @save_timer = nil
        end
        @quit_mutex = Mutex.new

        @plugins = nil
        @lang = Language.new(self, @config['core.language'])

        begin
          @auth = Auth::manager
          @auth.bot_associate(self)
          # @auth.load("#{botclass}/botusers.yaml")
        rescue Exception => e
          fatal e
          log_session_end
          exit 2
        end
        @auth.everyone.set_default_permission("*", true)
        @auth.botowner.password= @config['auth.password']

        Dir.mkdir("#{botclass}/plugins") unless File.exist?("#{botclass}/plugins")
        @plugins = Plugins::manager
        @plugins.bot_associate(self)
        setup_plugins_path()

        if @config['server.name']
            debug "upgrading configuration (server.name => server.list)"
            srv_uri = 'irc://' + @config['server.name']
            srv_uri += ":#{@config['server.port']}" if @config['server.port']
            @config.items['server.list'.to_sym].set_string(srv_uri)
            @config.delete('server.name'.to_sym)
            @config.delete('server.port'.to_sym)
            debug "server.list is now #{@config['server.list'].inspect}"
        end

        @socket = Irc::Socket.new(@config['server.list'], @config['server.bindhost'], :ssl => @config['server.ssl'])
        @client = Client.new

        @plugins.scan

        # Channels where we are quiet
        # Array of channels names where the bot should be quiet
        # '*' means all channels
        #
        @quiet = Set.new
        # but we always speak here
        @not_quiet = Set.new

        # the nick we want, if it's different from the irc.nick config value
        # (e.g. as set by a !nick command)
        @wanted_nick = nil

        @client[:welcome] = proc {|data|
          m = WelcomeMessage.new(self, server, data[:source], data[:target], data[:message])

          @plugins.delegate("welcome", m)
          @plugins.delegate("connect")
        }

        # TODO the next two @client should go into rfc2812.rb, probably
        # Since capabs are two-steps processes, server.supports[:capab]
        # should be a three-state: nil, [], [....]
        asked_for = { "identify-msg""identify-msg" => false }
        @client[:isupport] = proc { |data|
          if server.supports[:capab] and !asked_for["identify-msg""identify-msg"]
            sendq "CAPAB IDENTIFY-MSG"
            asked_for["identify-msg""identify-msg"] = true
          end
        }
        @client[:datastr] = proc { |data|
          if data[:text] == "IDENTIFY-MSG"
            server.capabilities["identify-msg""identify-msg"] = true
          else
            debug "Not handling RPL_DATASTR #{data[:servermessage]}"
          end
        }

        @client[:privmsg] = proc { |data|
          m = PrivMessage.new(self, server, data[:source], data[:target], data[:message], :handle_id => true)
          # debug "Message source is #{data[:source].inspect}"
          # debug "Message target is #{data[:target].inspect}"
          # debug "Bot is #{myself.inspect}"

          @config['irc.ignore_users'].each { |mask|
            if m.source.matches?(server.new_netmask(mask))
              m.ignored = true
            end
          }

          @plugins.irc_delegate('privmsg', m)
        }
        @client[:notice] = proc { |data|
          message = NoticeMessage.new(self, server, data[:source], data[:target], data[:message], :handle_id => true)
          # pass it off to plugins that want to hear everything
          @plugins.irc_delegate "notice", message
        }
        @client[:motd] = proc { |data|
          m = MotdMessage.new(self, server, data[:source], data[:target], data[:motd])
          @plugins.delegate "motd", m
        }
        @client[:nicktaken] = proc { |data|
          new = "#{data[:nick]}_"
          nickchg new
          # If we're setting our nick at connection because our choice was taken,
          # we have to fix our nick manually, because there will be no NICK message
          # to inform us that our nick has been changed.
          if data[:target] == '*'
            debug "setting my connection nick to #{new}"
            nick = new
          end
          @plugins.delegate "nicktaken", data[:nick]
        }
        @client[:badnick] = proc {|data|
          warning "bad nick (#{data[:nick]})"
        }
        @client[:ping] = proc {|data|
          sendq "PONG #{data[:pingid]}"
        }
        @client[:pong] = proc {|data|
          @last_ping = nil
        }
        @client[:nick] = proc {|data|
          # debug "Message source is #{data[:source].inspect}"
          # debug "Bot is #{myself.inspect}"
          source = data[:source]
          old = data[:oldnick]
          new = data[:newnick]
          m = NickMessage.new(self, server, source, old, new)
          m.is_on = data[:is_on]
          if source == myself
            debug "my nick is now #{new}"
          end
          @plugins.irc_delegate("nick", m)
        }
        @client[:quit] = proc {|data|
          source = data[:source]
          message = data[:message]
          m = QuitMessage.new(self, server, source, source, message)
          m.was_on = data[:was_on]
          @plugins.irc_delegate("quit", m)
        }
        @client[:mode] = proc {|data|
          m = ModeChangeMessage.new(self, server, data[:source], data[:target], data[:modestring])
          m.modes = data[:modes]
          @plugins.delegate "modechange", m
        }
        @client[:whois] = proc {|data|
          source = data[:source]
          target = server.get_user(data[:whois][:nick])
          m = WhoisMessage.new(self, server, source, target, data[:whois])
          @plugins.delegate "whois", m
        }
        @client[:join] = proc {|data|
          m = JoinMessage.new(self, server, data[:source], data[:channel], data[:message])
          sendq("MODE #{data[:channel]}", nil, 0) if m.address?
          @plugins.irc_delegate("join", m)
          sendq("WHO #{data[:channel]}", data[:channel], 2) if m.address?
        }
        @client[:part] = proc {|data|
          m = PartMessage.new(self, server, data[:source], data[:channel], data[:message])
          @plugins.irc_delegate("part", m)
        }
        @client[:kick] = proc {|data|
          m = KickMessage.new(self, server, data[:source], data[:target], data[:channel],data[:message])
          @plugins.irc_delegate("kick", m)
        }
        @client[:invite] = proc {|data|
          m = InviteMessage.new(self, server, data[:source], data[:target], data[:channel])
          @plugins.irc_delegate("invite", m)
        }
        @client[:changetopic] = proc {|data|
          m = TopicMessage.new(self, server, data[:source], data[:channel], data[:topic])
          m.info_or_set = :set
          @plugins.irc_delegate("topic", m)
        }
        # @client[:topic] = proc { |data|
        #   irclog "@ Topic is \"#{data[:topic]}\"", data[:channel]
        # }
        @client[:topicinfo] = proc { |data|
          channel = data[:channel]
          topic = channel.topic
          m = TopicMessage.new(self, server, data[:source], channel, topic)
          m.info_or_set = :info
          @plugins.irc_delegate("topic", m)
        }
        @client[:names] = proc { |data|
          m = NamesMessage.new(self, server, server, data[:channel])
          m.users = data[:users]
          @plugins.delegate "names", m
        }
        @client[:unknown] = proc { |data|
          #debug "UNKNOWN: #{data[:serverstring]}"
          m = UnknownMessage.new(self, server, server, nil, data[:serverstring])
          @plugins.delegate "unknown_message", m
        }

        set_default_send_options :newlines => @config['send.newlines'].to_sym,
          :join_with => @config['send.join_with'].dup,
          :max_lines => @config['send.max_lines'],
          :overlong => @config['send.overlong'].to_sym,
          :split_at => Regexp.new(@config['send.split_at']),
          :purge_split => @config['send.purge_split'],
          :truncate_text => @config['send.truncate_text'].dup

        trap_sigs
      end