Class: PercentualDistributor

Inherits:
Object
  • Object
show all
Defined in:
lib/ektoplayer/views/trackrenderer.rb

Instance Method Summary collapse

Constructor Details

#initialize(total: 0, parts: []) ⇒ PercentualDistributor

Returns a new instance of PercentualDistributor.



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# File 'lib/ektoplayer/views/trackrenderer.rb', line 4

def initialize(total: 0, parts: [])
   @total, @parts = total, parts
   @results = nil
end

Instance Method Details

#add_part(n) ⇒ Object 



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# File 'lib/ektoplayer/views/trackrenderer.rb', line 14

def add_part(n)
   @parts << n
   @results = nil
end

#get_for(part) ⇒ Object 



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# File 'lib/ektoplayer/views/trackrenderer.rb', line 19

def get_for(part)
   fail ArgumentError unless @parts.include? part

   unless @results
      @results = Hash.new { |h,k| h[k] = [] }

      part_total, results_total = @parts.sum, 0
      @parts.each_with_index do |p,i|
         v = @total * p / part_total
         @results[p] << v
         results_total += v
      end

      @results.each do |k, values|
         values.map! do |v|
            if results_total > @total
               results_total -= 1
               v - 1
            elsif results_total < @total
               results_total += 1
               v + 1
            else
               v
            end
         end
      end
   end

   @results[part].unshift(r = @results[part].pop)
   r
end

#increment_total(n) ⇒ Object 



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# File 'lib/ektoplayer/views/trackrenderer.rb', line 9

def increment_total(n)
   @total += n
   @results = nil
end