gistfile1.rb

module Reports
  module CauseCumulativeCommission
    extend self
    def build(name, cause, opts=ReportOptions.new)
      {
        :name => name,
        :columns => [['date', 'Date'], ['number', cause.name]],
        
        :rows => begin
          (opts.start_date..opts.end_date).step.inject([]) do |rows, date|
            rows << [date, cause.metrics.commission(date).round(2)]
            rows
          end          
        end,
        
        :options => {
          chartArea: { width: '90%', height: '75%' },
          legend: 'bottom'
        }
      }
    end
  end
end