Class: Geoptima::Locator

Inherits:
Object
  • Object
show all
Defined in:
lib/geoptima/locator.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(sorted, options = {}) ⇒ Locator

Returns a new instance of Locator.



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# File 'lib/geoptima/locator.rb', line 118

def initialize(sorted, options={})
  @sorted = sorted
  @options = Hash[*options.map{|k,v| [k.to_s.intern,v]}.flatten]
  @options[:algorithm] ||= 'window'
  @options[:window] ||= 60
  puts "Initialized geo-location on #{@sorted.length} events with options: #{@options.inspect}" if($debug)
end

Instance Attribute Details

#failed ⇒ Object (readonly)

Returns the value of attribute failed.



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# File 'lib/geoptima/locator.rb', line 117

def failed
  @failed
end

#located ⇒ Object (readonly)

Returns the value of attribute located.



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# File 'lib/geoptima/locator.rb', line 117

def located
  @located
end

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/geoptima/locator.rb', line 117

def options
  @options
end

#sorted ⇒ Object (readonly)

Returns the value of attribute sorted.



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# File 'lib/geoptima/locator.rb', line 117

def sorted
  @sorted
end

Instance Method Details

#algorithm ⇒ Object 



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# File 'lib/geoptima/locator.rb', line 128

def algorithm
  @algorithm ||= case @options[:algorithm].to_s
  when /^\-win/
    BeforeLocatorAlgorithm.new
  when /^\+win/
    AfterLocatorAlgorithm.new
  when /closest/
    ClosestLocatorAlgorithm.new
  when /inter/
    InterpolationLocatorAlgorithm.new
  else
    LocatorAlgorithm.new
  end
end

#locate ⇒ Object 



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# File 'lib/geoptima/locator.rb', line 142

def locate
  gps = nil
  @located = []
  @failed = []
  locatables = []
  time_window = @options[:window].to_i
  time_window = 60 if(time_window<1)
  puts "Locating within window[#{time_window}] using algorithm:#{algorithm.class}" if($debug)
  sorted.each do |event|
    event.time ||= start + event[:timestamp].to_f / Geoptima::MSPERDAY
    if event.name === 'gps'
      gps = event
      puts "Setting GPS location point: #{gps.inspect}" if($debug)
      gps.location = Point.new(gps['latitude'].to_f, gps['longitude'].to_f)
      locatables.each do |event|
        event.set_next_if(gps,time_window)
      end
      locatables = []
    else
      event.set_previous_if(gps,time_window)
      locatables << event
      @located << event
    end
  end
  @located = @located.map do |l|
    if self.algorithm.locate(l)
      l
    else
      @failed << l
      nil
    end
  end.compact
end

#start ⇒ Object 



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# File 'lib/geoptima/locator.rb', line 125

def start
  @start ||= sorted[0] && sorted[0][:time] || DateTime.now
end