Class: Promotion

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
app/models/promotion.rb

Constant Summary collapse

MATCH_POLICIES = 
%w(all any)

Instance Method Summary collapse

Instance Method Details

#compute(order) ⇒ Object 



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# File 'app/models/promotion.rb', line 62

def compute(order)
  amount = calculator.compute(order)
  amount = order.item_total if amount > order.item_total
  -amount
end

#create_discount(order) ⇒ Object 



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# File 'app/models/promotion.rb', line 48

def create_discount(order)
  return if order.promotion_credit_exists?(self)
  if eligible?(order) and amount = compute(order)
    order.promotion_credits.reload.clear unless combine? and order.promotion_credits.all? { |credit| credit.source.combine? }
    order.update!
    PromotionCredit.create!({
        :label => "#{I18n.t(:coupon)} (#{code})",
        :source => self,
        :amount => -amount.abs,
        :order => order
      })
  end
end

#credits_count ⇒ Object 



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# File 'app/models/promotion.rb', line 35

def credits_count
  credits.with_order.count
end

#eligible?(order) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/promotion.rb', line 25

def eligible?(order)
  !expired? && rules_are_eligible?(order)
end

#expired? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/promotion.rb', line 29

def expired?
  starts_at && Time.now < starts_at ||
  expires_at && Time.now > expires_at ||
  usage_limit && credits_count >= usage_limit
end

#products ⇒ Object

Products assigned to all product rules



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# File 'app/models/promotion.rb', line 69

def products
  @products ||= rules.of_type("Promotion::Rules::Product").map(&:products).flatten.uniq
end

#rules_are_eligible?(order) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'app/models/promotion.rb', line 39

def rules_are_eligible?(order)
  return true if rules.none?
  if match_policy == 'all'
    rules.all?{|r| r.eligible?(order)}
  else
    rules.any?{|r| r.eligible?(order)}
  end
end

#save ⇒ Object

TODO: Remove that after fix for rails.lighthouseapp.com/projects/8994/tickets/4329-has_many-through-association-does-not-link-models-on-association-save is provided



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# File 'app/models/promotion.rb', line 14

def save(*)
  if super
    promotion_rules.each { |p| p.save }
  end
end