Method: UState::State.sum

Defined in:
lib/ustate/state.rb

.sum(states, init = State.new) ⇒ Object

Sum a set of states together. Adds metrics, takes the mode state, mode service and the mean time. If init is provided, its values override (where present) the computed ones.



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# File 'lib/ustate/state.rb', line 50

def self.sum(states, init = State.new)
  init = case init
         when State
           init.dup
         else
           State.new init
         end
  
  # Metric
  init.metric_f ||= states.inject(0.0) { |a, state|
      a + (state.metric || 0)
    }
  if init.metric_f.nan?
    init.metric_f = 0.0
  end

  # State
  init.state ||= mode states.map(&:state)
  init.service ||= mode states.map(&:service)

  # Time
  init.time = begin 
    times = states.map(&:time).compact
    (times.inject(:+) / times.size).to_i
  rescue 
  end
  init.time ||= Time.now.to_i

  init
end