coupon.rb in tang-0.0.8

- old
+ new
@@ -1,5 +1,99 @@
 module Tang
   class Coupon < ActiveRecord::Base
     has_paper_trail
+    # acts_as_paranoid
+
+    has_many :customers, class_name: Tang.customer_class.to_s
+    has_many :subscriptions
+    has_many :invoices
+
+    validates :stripe_id, presence: true
+    validates :stripe_id, uniqueness: true # , if: "deleted_at.nil?"
+    validates :duration, inclusion: { in: %w(once repeating forever) }
+    validates :amount_off, numericality: { only_integer: true, greater_than: 0 }, allow_nil: true
+    validates :currency, presence: true, if: -> { amount_off.present? }
+    validates :duration_in_months, presence: true, numericality: { only_integer: true, greater_than: 0 }, if: :repeating?
+    validates :max_redemptions, numericality: { only_integer: true, greater_than: 0 }, allow_nil: true
+    validates :percent_off, numericality: { only_integer: true, greater_than_or_equal_to: 1, less_than_or_equal_to: 100 },
+                            presence: true, if: -> { amount_off.nil? }
+    validates :redeem_by, future: true, if: -> { redeem_by.present? }
+
+    before_create :create_stripe_coupon
+    before_update :update_stripe_coupon
+    before_destroy :delete_stripe_coupon # should be soft delete
+
+    DURATIONS = ['once', 'repeating', 'forever']
+
+    def coupon_valid?
+      # check if expired
+      if self.redeem_by.present?
+        return false if Time.now > self.redeem_by
+      end
+
+      if self.max_redemptions.present?
+        # check if any discounts created
+      end
+
+      return true
+    end
+
+    def formatted_duration
+      if repeating?
+        "for #{duration_in_months} months"
+      else
+        duration
+      end
+    end
+
+    def active_redemptions
+      customer_table = ActiveRecord::Base.connection.quote_table_name(Customer.table_name)
+      Tang.customer_class.
+           joins(:subscriptions).
+           where("#{customer_table}.coupon_id = ? OR tang_subscriptions.coupon_id = ?", self.id, self.id).
+           where.not(tang_subscriptions: { status: :canceled }).
+           uniq
+    end
+
+    def repeating?
+      duration == "repeating"
+    end
+
+    def discount(amount)
+      subtotal = amount
+      if self.percent_off.present?
+        subtotal = amount.to_f * (self.percent_off.to_f / 100.0)
+      elsif self.amount_off.present?
+        subtotal = self.amount_off
+      end
+      return -subtotal.to_f
+    end
+
+    def self.from_stripe(stripe_coupon)      
+      coupon = Coupon.find_or_create_by(stripe_id: stripe_coupon.id) do |c|
+        c.percent_off = stripe_coupon.percent_off
+        c.currency = stripe_coupon.currency
+        c.amount_off = stripe_coupon.amount_off
+        c.duration = stripe_coupon.duration
+        c.duration_in_months = stripe_coupon.duration_in_months
+        c.max_redemptions = stripe_coupon.max_redemptions
+        c.redeem_by = stripe_coupon.redeem_by
+      end
+
+      return coupon
+    end
+
+    private
+
+    def create_stripe_coupon
+      CreateCoupon.call(self)
+    end
+
+    def update_stripe_coupon
+      UpdateCoupon.call(self)
+    end
+
+    def delete_stripe_coupon
+      DeleteCoupon.call(self)
+    end
   end
 end