Class: MeterCat::Divide

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

Overview

Divide

Constant Summary collapse

FORMAT_RATIO = 
'%0.1f'.freeze
FORMAT_PERCENTAGE = 
"%0.1f\%".freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(numerator, denominator, format) ⇒ Divide

Returns a new instance of Divide.



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# File 'lib/meter_cat/calculator.rb', line 52

def initialize(numerator, denominator, format)
  @numerator = numerator
  @denominator = denominator
  @format = format
end

Instance Attribute Details

#denominator ⇒ Object

Returns the value of attribute denominator.



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# File 'lib/meter_cat/calculator.rb', line 47

def denominator
  @denominator
end

#format ⇒ Object

Returns the value of attribute format.



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# File 'lib/meter_cat/calculator.rb', line 47

def format
  @format
end

#numerator ⇒ Object

Returns the value of attribute numerator.



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# File 'lib/meter_cat/calculator.rb', line 47

def numerator
  @numerator
end

Instance Method Details

#calculate(meters, date) ⇒ Object

TODO: Rename format attr rubocop:disable Style/FormatString



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# File 'lib/meter_cat/calculator.rb', line 60

def calculate(meters, date)
  numerator = meters[@numerator] ? (meters[@numerator][date] || 0) : 0
  denominator = meters[@denominator] ? (meters[@denominator][date] || 0) : 0

  value = denominator.zero? ? 0.0 : (numerator.to_f / denominator.to_f)
  value *= 100 if @format == FORMAT_PERCENTAGE

  return sprintf(@format, value)
end

#dependencies ⇒ Object 



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# File 'lib/meter_cat/calculator.rb', line 70

def dependencies
  [@numerator, @denominator]
end