Class: Gps::Device

Inherits:
Object
  • Object
show all
Defined in:
lib/gps/device.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(filename, track_datetime = true) ⇒ Device

Returns a new instance of Device.



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# File 'lib/gps/device.rb', line 5

def initialize(filename, track_datetime=true)
  @callbacks = {}
  @track_datetime = track_datetime
  @filename = filename
  @file = File.open(filename, 'rb')
end

Instance Attribute Details

#last_datetime ⇒ Object

Updates any time a sentence has a datetime



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# File 'lib/gps/device.rb', line 3

def last_datetime
  @last_datetime
end

Class Method Details

.open(filename, &block) ⇒ Object 



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# File 'lib/gps/device.rb', line 12

def self.open(filename, &block)
  device = Device.new filename
  block.call device
  device.close
end

Instance Method Details

#close ⇒ Object 



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# File 'lib/gps/device.rb', line 18

def close
  @file.close if @file
end

#each_coordinates(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 39

def each_coordinates(&block)
  each_sentence do |sentence|
    block.call sentence.lat_long_dec if sentence.has_coordinates?
  end
end

#each_line(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 22

def each_line(&block)
  @file.each_line do |line|
    line.strip!
    next if line.empty?
    block.call line
  end
end

#each_sentence(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 30

def each_sentence(&block)
  each_line do |line|
    s = Nmea::Sentence.parse line
    next if s.nil?
    update_datetime s if @track_datetime
    block.call s
  end
end

#on_altitude(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 133

def on_altitude(&block)
  callbacks[:altitude] ||= []
  callbacks[:altitude] << block
end

#on_complete(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 138

def on_complete(&block)
  callbacks[:complete] ||= []
  callbacks[:complete] << block
end

#on_coordinates(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 113

def on_coordinates(&block)
  callbacks[:coordinates] ||= []
  callbacks[:coordinates] << block
end

#on_datetime(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 118

def on_datetime(&block)
  callbacks[:datetime] ||= []
  callbacks[:datetime] << block
end

#on_magnetic_track(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 148

def on_magnetic_track(&block)
  callbacks[:magnetic_track] ||= []
  callbacks[:magnetic_track] << block
end

#on_speed_kmh(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 128

def on_speed_kmh(&block)
  callbacks[:speed_kmh] ||= []
  callbacks[:speed_kmh] << block
end

#on_speed_knots(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 123

def on_speed_knots(&block)
  callbacks[:speed_knots] ||= []
  callbacks[:speed_knots] << block
end

#on_true_track(&block) ⇒ Object 



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# File 'lib/gps/device.rb', line 143

def on_true_track(&block)
  callbacks[:true_track] ||= []
  callbacks[:true_track] << block
end

#rewind ⇒ Object

Rewind file if not a character device



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# File 'lib/gps/device.rb', line 46

def rewind
  @file.rewind unless File.chardev?(@file.path)
end

#start ⇒ Object

Begin fetch process with callbacks



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# File 'lib/gps/device.rb', line 51

def start
  @stopped = false
  each_sentence do |sentence|
    break if @stopped

    if @callbacks[:coordinates] && sentence.has_coordinates?
      @callbacks[:coordinates].each do |block|
        block.call sentence.lat_long_dec
      end
    end


    if @callbacks[:datetime] && sentence.has_datetime?
      @callbacks[:datetime].each do |block|
        block.call sentence.datetime
      end
    end

    if @callbacks[:speed_knots] && sentence.respond_to?(:speed_knots)
      @callbacks[:speed_knots].each do |block|
        block.call sentence.speed_knots if sentence.speed_knots
      end
    end

    if @callbacks[:speed_kmh] && sentence.respond_to?(:speed_kmh)
      @callbacks[:speed_kmh].each do |block|
        block.call sentence.speed_kmh if sentence.speed_kmh
      end
    end

    if @callbacks[:altitude] && sentence.respond_to?(:altitude)
      @callbacks[:altitude].each do |block|
        block.call sentence.altitude if sentence.altitude
      end
    end

    if @callbacks[:true_track] && sentence.respond_to?(:true_track)
      @callbacks[:true_track].each do |block|
        block.call sentence.true_track if sentence.true_track
      end
    end

    if @callbacks[:magnetic_track] && sentence.respond_to?(:magnetic_track)
      @callbacks[:magnetic_track].each do |block|
        block.call sentence.magnetic_track if sentence.magnetic_track
      end
    end
  end

  if @callbacks[:complete]
    @callbacks[:complete].each(&:call)
  end
end

#start_async ⇒ Object 



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# File 'lib/gps/device.rb', line 105

def start_async
  Thread.new(&method(:start))
end

#stop ⇒ Object 



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# File 'lib/gps/device.rb', line 109

def stop
  @stopped = true
end