class Ld3w

# File lib/ld3w.rb, line 16
def initialize(device: 'rfcomm0', bdaddress: '', channel: '1', 
               affirmations: 5, verbose: true)

  @command = "rfcomm connect %s %s %s" % [device, bdaddress, channel]
  @file = '/dev/' + device
  @np = NMEAParser.new
  @affirmations, @device, @verbose = affirmations, device, verbose

end

# File lib/ld3w.rb, line 26
def locate()

  lines = []
  
  IO.popen @command, autoclose: true do |io|
    
    sleep 2
    t = Time.now
    
    (sleep 1; puts 'waiting ...') until File.exists?(@file) or 
        Time.now > (t + 10)
    
    if File.exists? @file then
      lines = read_file() 
    else
      msg = 'Cannot open file ' + @file
      puts msg.error
      #raise(Ld3wError, msg)
    end

    puts 'bye'
    Process.kill('INT', io.pid)      
    sleep 2

  end
  
  #`rfcomm release #{@device}`

  lines


end

# File lib/ld3w.rb, line 59
def read_file()
  
  lines = []
  pattern = /^\$GPGGA/
  line_count = 0

  IO.foreach(@file) do |x| 

    print "GOT ", x if @verbose
    c = x.split(',').count('')

    if x =~ pattern and c <= 2 then
      lines << x

      line_count > @affirmations ? break : line_count += 1
    end
    sleep 0.03
  end
  sleep 2
  

  lines.map {|x| @np.parse(x) }    
end