Class: Toast::ConsoleChannel

Inherits:
Channel
  • Object
show all
Defined in:
lib/console_channel.rb

Instance Attribute Summary

Attributes inherited from Channel

#responder_class, #responders

Class Method Summary collapse

Instance Method Summary collapse

Methods inherited from Channel

#handle, #next_msg, #responder_for

Constructor Details

#initialize(responder_class) ⇒ ConsoleChannel

Returns a new instance of ConsoleChannel.



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# File 'lib/console_channel.rb', line 3

def initialize responder_class
  super responder_class
  @hear_commands=true
  @exit_now=false
end

Class Method Details

.run(responder_class) ⇒ Object 



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# File 'lib/console_channel.rb', line 21

def self.run responder_class
  channel=ConsoleChannel.new responder_class
  channel.run
end

Instance Method Details

#handle_line(line) ⇒ Object 



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# File 'lib/console_channel.rb', line 37

def handle_line line
  if (line[0,1]=='.' && @hear_commands) ||
      line=~/\.commands\s+on/

    result=special_cmd line
    return if @exit_now
    send result,'' if result

  else
    handle Toast::Message.new(line,'console@localhost')
  end
end

#next_line ⇒ Object 



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# File 'lib/console_channel.rb', line 14

def next_line
  line = Readline::readline('> ')
  return nil unless line
  Readline::HISTORY.push(line)
  line
end

#run ⇒ Object 



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# File 'lib/console_channel.rb', line 26

def run
  send "Type .exit or ctrl-D to leave",""
  loop do
    msg=next_line
    break unless msg
    handle_line msg
    break if @exit_now
  end
  send nil,nil
end

#send(msg, to) ⇒ Object 



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# File 'lib/console_channel.rb', line 9

def send msg, to
  puts ""
  puts msg unless msg.nil?
end

#special_cmd(cmd) ⇒ Object 



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# File 'lib/console_channel.rb', line 50

def special_cmd cmd
  if cmd=='.exit'
    @exit_now=true
    return nil

  elsif cmd=~/^\.srand\s+([0-9]+)/
    srand $1.to_i
    return "Random seed is #{$1}"

  elsif cmd=~/^\.commands\s+(on|off)/
    @hear_commands=($1=='on')
    return "Commands are #{$1}"

  elsif cmd=~/^.script\s+(\S+)/
    old_dir=@current_dir

    file=$1
    unless file=~/^\// # if it's a relative path, then tack @current_dir on
      file=File.expand_path(@current_dir+"/"+file)
    end

    @current_dir=File.dirname(file)
    
    File.new(file).each do |line|
      handle_line line.strip unless line.blank? || line=~/^\s*#/
      break if @exit_now
    end

    @current_dir=old_dir
    return nil

  elsif cmd=~/^.send\s+(.*)/
    args=$1.strip.split(/\s+/)
    fn=args.shift.to_sym
    begin
      response=responder_for('console@localhost').send(fn, *args)
    rescue
      response=$!.to_s
    end
    return response
  end

  return "Bad command #{cmd}"
end