torrent

#! /usr/bin/env ruby
require 'transmission_api'
require 'pp'

class TorrentCli
  def initialize(conf_file = "#{ENV['HOME']}/.torrent.conf")
    @conf_file = conf_file
    unless File.exist?(conf_file)
      $stderr.puts "Config file does not exists. Default is : ~/.torrent.conf"
      exit 1
    end
  end

  def run(args)
    check_args(args)
    command = args.shift
    params = args
    send(command, params)
  end

  def add(params = [])
    client.create params.shift
  end

  def check_args(args)
    unless args.count == 2
      $stderr.puts "Usage: torrent add <torrent_url>"
      exit 1
    end
  end

  def check_config(config)
    unless config[:username] && config[:password] && config[:url]
      $stderr.puts "Config file should contains: username, password and url in json format"
      exit 1
    end
  end

  def client
    @client ||= TransmissionApi::Client.new(configuration)
  end

  def configuration
    @conf ||= JSON.parse(File.read(@conf_file)).inject({}){|memo,(k,v)| memo[k.to_sym] = v; memo}.tap do |conf|
      check_config(conf)
    end
  end
end

TorrentCli.new.run(ARGV)