Module: BrighterPlanet::Pet::CarbonModel

Defined in:
lib/pet/carbon_model.rb

Constant Summary collapse

ANNUAL_VETERINARY_EMISSION =

kg CO2e per brighterplanet.sifterapp.com/projects/30/issues/846/comments

0.00437.tons.to :kilograms

Class Method Summary collapse

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/pet/carbon_model.rb', line 10

def self.included(base)
  base.decide :emission, :with => :characteristics do
    committee :emission do
      quorum 'from diet size', :needs => [:diet_size, :diet_emission_intensity, :active_subtimeframe] do |characteristics, timeframe|
        characteristics[:active_subtimeframe].days * characteristics[:diet_size] * characteristics[:diet_emission_intensity] + ANNUAL_VETERINARY_EMISSION * (characteristics[:active_subtimeframe] / timeframe.year)
      end
    end
    
    committee :diet_emission_intensity do # kg/joule
      quorum 'from species', :needs => :species do |characteristics|
        characteristics[:species].diet_emission_intensity
      end
      
      quorum 'default' do
        base.fallback.diet_emission_intensity
      end
    end
    
    committee :diet_size do # joules
      quorum 'from weight', :needs => [:weight, :marginal_dietary_requirement, :fixed_dietary_requirement] do |characteristics|
        characteristics[:weight] * characteristics[:marginal_dietary_requirement] + characteristics[:fixed_dietary_requirement]
      end
    end
    
    committee :marginal_dietary_requirement do # joules/kg
      quorum 'from species', :needs => :species do |characteristics|
        characteristics[:species].marginal_dietary_requirement
      end

      quorum 'default' do
        base.fallback.marginal_dietary_requirement
      end
    end
    
    committee :fixed_dietary_requirement do # joules
      quorum 'from species', :needs => :species do |characteristics|
        characteristics[:species].fixed_dietary_requirement
      end

      quorum 'default' do
        base.fallback.fixed_dietary_requirement
      end
    end
    
    committee :weight do # kg
      quorum 'from breed and gender', :needs => [:breed, :gender] do |characteristics|
        if breed_gender = BreedGender.find_by_breed_name_and_gender_name(characteristics[:breed].name, characteristics[:gender].name)
          breed_gender.weight
        end
      end
      
      quorum 'from breed', :needs => :breed do |characteristics|
        characteristics[:breed].weight
      end

      quorum 'from species', :needs => :species do |characteristics|
        characteristics[:species].weight
      end

      quorum 'default' do
        base.fallback.weight
      end
    end
    
    committee :active_subtimeframe do
      quorum 'from acquisition and retirement', :needs => [:acquisition, :retirement] do |characteristics, timeframe|
        Timeframe.constrained_new characteristics[:acquisition].to_date, characteristics[:retirement].to_date, timeframe
      end
    end
    
    committee :acquisition do
      quorum 'from retirement', :appreciates => :retirement do |characteristics, timeframe|
        [ timeframe.from, characteristics[:retirement] ].compact.min
      end
    end
    
    committee :retirement do
      quorum 'from acquisition', :appreciates => :acquisition do |characteristics, timeframe|
        [ timeframe.to, characteristics[:acquisition] ].compact.max
      end
    end
  end
end