Contents

module Cinch::Plugins
  class Calculate
    include Cinch::Plugin

    self.help = "Use .math <problem> to do math computations. (e.g. 5 feet / inches, .math sin(2) + 4)"

    match /math (.+)/

    def initialize(*args)
      super
      @units_path = config[:units_path] || '/usr/bin/units'
    end

    def execute(m, problem)
      m.reply math(problem), true
    end

    private

    def math(problem_string)
      return 'Sorry, I can\'t do that' unless units_binary_exists?

      units_output = IO.popen([@units_path, "-t", problem_string])

      return units_output.readline.chomp!
    rescue EOFError
      # If you don't have GNU Units installed you will get this error.
      debug "Your copy of Units did not produce useful output."
      debug "Make sure you have GNU Units installed and not the BSD Units that ships with OSX."
      return 'Sorry, I can\'t do that'
    end

    def units_binary_exists?
      return true if File.exist? @units_path
      debug "Cinch can't find the unit conversion binary."
      false
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
cinch-calculate-0.0.1	lib/cinch/plugins/calculate/calculate.rb