smith_prototype.rb

#!/bin/env ruby


class SmithCommands
  attr_accessor :plugins
  def initialize
    @plugins = []
  end

  def add(plugin)
    @plugins << plugin
  end

  def check_and_run(msg)
    @plugins.each do |p|
      if p.matches? msg
        p.run(msg)
        return
      end
    end
    not_found
  end

  def not_found
    puts "I didn't find a matching plugin."
  end

  def usage
    puts "USAGE: \n"
    puts plugins.map(&:usage).join "\n"
    puts "\n\n"
  end
end

class Buttle
  def matches?(line)
    line.include? "Smith"
  end

  def run(line)
    puts "You rang?"
  end

  def usage
    "Does a thing when it sees Smith.  Trigger: 'Smith'"
  end
end

class Jerk
  def matches?(line)
    line.include? "HEY"
  end

  def run(line)
    puts "WHAT THE HELL DO YOU WANT?"
  end

  def usage
    "Yells at you when you are rude.  Trigger: 'HEY'"
  end
end

class Adder
  attr_accessor :num
  def initialize
    @num = 0
  end
  def matches?(line)
    line.include? "add" or line.include? "reset"
  end

  def run(line)
    add   if line.include? "add"
    reset if line.include? "reset"
  end
  def add
    @num = @num + 1
    puts "Ok. Current value is #{num}"
  end
  def reset
    @num = 0
    puts "Ok.  Current value reset to #{num}"
  end

  def usage
    "Keeps a counter"
  end
end


commands = SmithCommands.new
#put this in a require loop
commands.add Buttle.new
commands.add Jerk.new
commands.add Adder.new

commands.usage

["Hey Smith", "HEY ASSHOLE!", "add","add","reset","bla bla bla","add"].each do |m|
  puts "Checking and running for #{m}"
  commands.check_and_run(m)
end