Module: MetricsHelper

Defined in:
app/helpers/metrics_helper.rb

Instance Method Summary collapse

Instance Method Details

#summary_headers(summary) ⇒ Object 



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# File 'app/helpers/metrics_helper.rb', line 2

def summary_headers(summary)
  if summary.action == "count"
    [summary.group_by_key, summary.action]
  else
    [summary.group_by_key, summary.action, 'Amount']
  end
end

#summary_results(summary, results) ⇒ Object 



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# File 'app/helpers/metrics_helper.rb', line 10

def summary_results(summary, results)
  response = []
  headers = results[0]
  summary_key = summary.group_by_key.capitalize.gsub("_"," ")
  summary_index = headers.index(summary_key)

  if summary.action_on.present?
    summary_action_on = summary.action_on.capitalize.gsub("_"," ")
    summary_action_on_index = headers.index(summary_action_on)
  end

  summary_results = results.map{|x| x[summary_index]}.uniq.compact.sort - [summary_key]

  case summary.action
  when 'count'
    summary_results.each do |s|
      response << {:key => s, :count => results.count{|x| x[summary_index] == s }}
    end
  when 'sum'
    summary_results.each do |s|
      response << {:key => s, :count => results.count{|x| x[summary_index] == s }, :sum => results.select{|x| x[summary_index] == s }.sum{|x| x[summary_action_on_index].to_f }}
    end
  when 'average'
    summary_results.each do |s|
      response << {:key => s, :count => results.count{|x| x[summary_index] == s }, :average => results.select{|x| x[summary_index] == s }.sum{|x| x[summary_action_on_index].to_f } / results.count{|x| x[summary_index] == s }}
    end
  when 'median'
    summary_results.each do |s|
      response << {:key => s, :count => results.count{|x| x[summary_index] == s }, :median => median(results.select{|x| x[summary_index] == s }.map{|x| x[summary_action_on_index].to_f })}
    end
  else
    raise "#{summary.action.capitalize} is not defined, please define it in metrics_helper.rb"
  end

  return response
end