api_service.rb

require 'json'
require 'httpclient'

module SPTrans
  class APIService
    API_URL = "http://api.olhovivo.sptrans.com.br/v0"
    TOKEN = "5e20a6e514afa82121420017cbaf867bc2fca8b13c30f76b3c179f42f10ae486"

    def initialize
      @client = HTTPClient.new
      connect(@client)
    end

    def connect(client)
      begin
        @client.post("#{API_URL}/login/autenticar?token=#{TOKEN}", {})
      rescue Exception => e
        puts e.message
        puts e.backtrace.inspect
      end
    end

    def getUpcomingBus(stop_code)
    # Recebe um ponto de parada e retorna uma lista com a previsão
    # de chegada dos veículos até aquele ponto.
      begin
        response = @client.get "#{API_URL}/Previsao/Parada?codigoParada=#{stop_code}", {}
        JSON.parse(response.body)
      rescue Exception => e
        puts e.message
        puts e.backtrace.inspect
      end
    end

    def getBusPosition(line_code)
      begin
        response = @client.get "#{API_URL}/Posicao?codigoLinha=#{line_code}", {}
        JSON.parse(response.body)
      rescue Exception => e
        puts e.message
        puts e.backtrace.inspect
      end
    end
  end
end