Module: IRCMachine::Command

Defined in:
lib/ircmachine/command.rb

Class Method Summary collapse

Class Method Details

.cmds ⇒ Object 



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# File 'lib/ircmachine/command.rb', line 7

def cmds
  @cmds ||= {}
end

.defcmd(cmd, *arg_names) ⇒ Object 



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# File 'lib/ircmachine/command.rb', line 28

def defcmd(cmd, *arg_names)
  cmd = cmd.strip.upcase

  klass = Class.new do
    define_method(:initialize) do |prefix = nil, *args|
      @prefix = prefix
      arg_names.zip(args).each { |name, value| instance_variable_set("@#{name}", value) }
    end

    # Create readers for the parameters.
    arg_names.each do |name|
      define_method(name) { instance_variable_get("@#{name}") }
    end

    define_method(:prefix) { instance_variable_get('@prefix') }

    define_method(:to_msg) do
      param_values = arg_names.map { |k| instance_variable_get("@#{k}") }.join(' ')
      IRCMachine::Message.new(@prefix, cmd, param_values)
    end

    define_method(:to_s) { self.to_msg.to_s }
  end

  const_set("#{cmd.capitalize}Command", klass)
  cmds[cmd] = klass
end

.defrcmd(cmd, *arg_names) ⇒ Object

Same as defcmd, but arguments are passed in reverse order. This is to support the WHOIS command, which has an optional parameter in the middle, rather than at the end…



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# File 'lib/ircmachine/command.rb', line 60

def defrcmd(cmd, *arg_names)
  cmd = cmd.strip.upcase

  klass = Class.new do
    define_method(:initialize) do |prefix = nil, *args|
      instance_variable_set('@prefix', prefix)

      arg_names.reverse.zip(args.reverse).each { |name, value| instance_variable_set("@#{name}", value) }
    end

    # Create readers for the parameters.
    arg_names.each do |name|
      define_method(name) { instance_variable_get("@#{name}") }
    end

    define_method(:prefix) { instance_variable_get('@prefix') }

    define_method(:to_msg) do
      param_values = arg_names.reverse.map { |k| instance_variable_get("@#{k}") }.join(' ')

      IRCMachine::Message.new(
        instance_variable_get('@prefix'),
        cmd,
        param_values
      )
    end

    define_method(:to_s) { self.to_msg.to_s }
  end

  const_set("#{cmd.capitalize}Command", klass)
  cmds[cmd] = klass
end

.from_msg(msg) ⇒ Object 



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# File 'lib/ircmachine/command.rb', line 12

def from_msg(msg)
  if (klass = cmds[msg.command]).nil?
    fail ArgumentError, "Unknown command: #{msg.command}"
  else
    klass.new(msg.prefix, *msg.params)
  end
end

.parse(str) ⇒ Object 



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# File 'lib/ircmachine/command.rb', line 20

def parse(str)
  if (msg = IRCMachine::Message.parse(str)).nil?
    fail ArgumentError, 'Invalid format for IRC message.'
  else
    from_msg(msg)
  end
end