gistfile1.rb

$appid = ARGV[0]

class YahooAPIBase
  USER_AGENT = "webapi_test"
  $appid

  def build_querystring(params)
    query = []
    params.each do |k,v|
      query << "#{k}=#{v}"
    end
    query << "output=json"
    "?"+query.join("&")
  end

end

class WeatherAPI < YahooAPIBase
  def exec(req_params = { "coordinates" => "35.647306,140.034503" })
    protocol = "http"
    domain = "weather.olp.yahooapis.jp"
    endpoint = "/v1/place"
    port = "80"
    method = "GET"

    req_params.merge!({
                        "appid" => $appid,
                        "past" => 1
                      })
    
    query = build_querystring(req_params)
    SimpleHttp.new(protocol, domain, port).request(method, endpoint+query, {'User-Agent' => "#{USER_AGENT}"}).body
  end

end

class Cli
  def initialize
    @cli_commands = {}
  end

  def add_command(command)
    @cli_commands.merge!(command)
  end

  def run
    comp = proc { |s| @cli_commands.keys.grep( /^#{s}/ ) }

    Readline.completion_append_character = " "
    Readline.completion_proc = comp

    while command = Readline.readline('hogegeshell$ ', true)
      toplevel_command = command.split[0]
      if @cli_commands[toplevel_command]
        @cli_commands[toplevel_command].call command
      else
        puts "#{toplevel_command} is not defined."
      end
    end
  end

end

cli = Cli.new

cli.add_command({
                  "weather" => proc { |s|
                    api = WeatherAPI.new
                    puts api.exec
                  }
                })

cli.run