Class: ChurnAnalyzer

Inherits:
Object
  • Object
show all
Includes:
ScoringStrategies
Defined in:
lib/base/churn_analyzer.rb

Constant Summary collapse

COLUMNS = 
%w{times_changed}

Instance Method Summary collapse

Methods included from ScoringStrategies

#average, #identity, #percentile, #present, #sum

Instance Method Details

#columns ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 6

def columns
  COLUMNS
end

#generate_records(data, table) ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 27

def generate_records(data, table)
 return if data==nil
  Array(data[:changes]).each do |change|
    table << {
      "metric" => :churn,
      "times_changed" => change[:times_changed],
      "file_path" => change[:file_path]
    }
  end
end

#map(row) ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 14

def map(row)
  ScoringStrategies.present(row)
end

#name ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 10

def name
  :churn
end

#reduce(scores) ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 18

def reduce(scores)
  ScoringStrategies.sum(scores)
end

#score(metric_ranking, item) ⇒ Object 



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# File 'lib/base/churn_analyzer.rb', line 22

def score(metric_ranking, item)
  flat_churn_score = 0.50
  metric_ranking.scored?(item) ? flat_churn_score : 0
end