Class: CrossTimeCalculation

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

Defined Under Namespace

Classes: TimePoint

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ CrossTimeCalculation

Returns a new instance of CrossTimeCalculation.



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# File 'lib/cross_time_calculation.rb', line 7

def initialize
  self.time_points = Array.new
end

Instance Attribute Details

#time_points ⇒ Object

Returns the value of attribute time_points.



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# File 'lib/cross_time_calculation.rb', line 5

def time_points
  @time_points
end

Instance Method Details

#add(*time_begin_and_end) ⇒ Object 



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# File 'lib/cross_time_calculation.rb', line 11

def add *time_begin_and_end
  # init TimePoint pair
  tb = TimePoint.new(time_begin_and_end[0], :started_at)
  te = TimePoint.new(time_begin_and_end[1], :finished_at)

  # validate data
  raise "At least the begin time should exist" if not tb.t
  raise "The begin time should not larger than the end time" if te.t && (tb.t > te.t)

  # insert it and sort
  self.time_points << tb
  self.time_points << te if te.t
  self.time_points = self.time_points.uniq {|i| "#{i.t}#{i.status}" }.sort {|a, b| a.t.to_i <=> b.t.to_i }

  # TODO optimize search with idx
  loop do
    to_removes = []
    self.time_points.each_with_index do |tp, idx|
      post_tp = self.time_points[idx+1]
      next if post_tp.nil?
      # delete the first one if they are all finished_at
      to_removes << tp if (tp.status == :finished_at) && (post_tp.status == :finished_at)
      # delete the later one if they are all started_at
      to_removes << post_tp if (tp.status == :started_at) && (post_tp.status == :started_at)
    end
    self.time_points -= to_removes

    break if data_valid?
  end

  return self
end

#data_valid? ⇒ Boolean

start time and end time interval is supposed to exist

Returns:

  • (Boolean) 


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# File 'lib/cross_time_calculation.rb', line 57

def data_valid?
  valids = []
  self.time_points.each_slice(2) do |tp_start, tp_finish|
    next if tp_finish.nil?
    valids << (tp_start.status != tp_finish.status)
  end
  valids.count(false).zero?
end

#total_seconds ⇒ Object 



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# File 'lib/cross_time_calculation.rb', line 44

def total_seconds
  result = 0
  self.time_points.each_slice(2) do |a|
    end_time = a[1] ? a[1].t : Time.now
    if a[0] && a[0].t
      t = (end_time - a[0].t)
      result += t
    end
  end
  result
end