[to test] compute prices/invoices using cash coupons

app/models/invoice.rb

@@ -153,7 +153,9 @@ class Invoice < ActiveRecord::Base
       if avoir.coupon.type == 'percent_off'
         discount = avoir.total * avoir.coupon.percent_off / 100.0
       elsif avoir.coupon.type == 'amount_off'
-        discount = avoit.coupon.amount_off
+        discount = avoir.coupon.amount_off
+      else
+        raise InvalidCouponError
       end
       avoir.total -= discount
     end

app/models/reservation.rb

@@ -134,16 +134,25 @@ class Reservation < ActiveRecord::Base
 
     # === Coupon ===
     unless coupon_code.nil?
-      cp = Coupon.find_by(code: coupon_code)
-      if not cp.nil? and cp.status(user.id) == 'active'
-        @coupon = cp
+      @coupon = Coupon.find_by(code: coupon_code)
+      if not @coupon.nil? and @coupon.status(user.id) == 'active'
         total = invoice.invoice_items.map(&:amount).map(&:to_i).reduce(:+)
+
+        discount = 0
+        if @coupon.type == 'percent_off'
+          discount = (total  * @coupon.percent_off / 100).to_i
+        elsif @coupon.type == 'amount_off'
+          discount = @coupon.amount_off
+        else
+          raise InvalidCouponError
+        end
+
         unless on_site
           invoice_items << Stripe::InvoiceItem.create(
               customer: user.stp_customer_id,
-              amount: -(total  * cp.percent_off / 100).to_i,
+              amount: -discount,
               currency: Rails.application.secrets.stripe_currency,
-              description: "coupon #{cp.code} - reservation"
+              description: "coupon #{@coupon.code} - reservation"
           )
         end
       else
@@ -395,7 +404,7 @@ class Reservation < ActiveRecord::Base
       total += plan.amount
     end
     if @coupon
-      total = (total - (total  * @coupon.percent_off / 100.0)).to_i
+      total = CouponApplyService.new.(total, @coupon, user.id)
     end
     wallet_amount = (user.wallet.amount * 100).to_i
 
@@ -423,7 +432,7 @@ class Reservation < ActiveRecord::Base
     unless coupon_code.nil?
       cp = Coupon.find_by(code: coupon_code)
       if not cp.nil? and cp.status(user.id) == 'active'
-        total = total - (total  * cp.percent_off / 100.0)
+        total = CouponApplyService.new.(total, cp, user.id)
         self.invoice.coupon_id = cp.id
       else
         raise InvalidCouponError

app/models/subscription.rb

@@ -25,15 +25,24 @@ class Subscription < ActiveRecord::Base
         invoice_items = []
 
         unless coupon_code.nil?
-          cp = Coupon.find_by(code: coupon_code)
-          if not cp.nil? and cp.status(user.id) == 'active'
-            @coupon = cp
+          @coupon = Coupon.find_by(code: coupon_code)
+          if not @coupon.nil? and @coupon.status(user.id) == 'active'
             total = plan.amount
+
+            discount = 0
+            if @coupon.type == 'percent_off'
+              discount = (total  * @coupon.percent_off / 100).to_i
+            elsif @coupon.type == 'amount_off'
+              discount = @coupon.amount_off
+            else
+              raise InvalidCouponError
+            end
+
             invoice_items << Stripe::InvoiceItem.create(
                 customer: user.stp_customer_id,
-                amount: -(total  * cp.percent_off / 100.0).to_i,
+                amount: -discount,
                 currency: Rails.application.secrets.stripe_currency,
-                description: "coupon #{cp.code} - subscription"
+                description: "coupon #{@coupon.code} - subscription"
             )
           else
             raise InvalidCouponError
@@ -159,11 +168,11 @@ class Subscription < ActiveRecord::Base
     total = plan.amount
 
     unless coupon_code.nil?
-      cp = Coupon.find_by(code: coupon_code)
-      if not cp.nil? and cp.status(user.id) == 'active'
-        @coupon = cp
-        coupon_id = cp.id
-        total = plan.amount - (plan.amount * cp.percent_off / 100.0)
+      @coupon = Coupon.find_by(code: coupon_code)
+
+      unless @coupon.nil?
+        total = CouponApplyService.new.(plan.amount, @coupon, user.id)
+        coupon_id = @coupon.id
       end
     end
 
@@ -293,7 +302,7 @@ class Subscription < ActiveRecord::Base
   def get_wallet_amount_debit
     total = plan.amount
     if @coupon
-      total = (total - (total  * @coupon.percent_off / 100.0)).to_i
+      total = CouponApplyService.new.(total, @coupon, user.id)
     end
     wallet_amount = (user.wallet.amount * 100).to_i
     return wallet_amount >= total ? total : wallet_amount

app/pdfs/pdf/invoice.rb

@@ -143,7 +143,15 @@ module PDF
         # subtract the coupon, if any
         unless invoice.coupon_id.nil?
           cp = invoice.coupon
-          discount = total_calc  * cp.percent_off / 100.0
+          discount = 0
+          if cp.type == 'percent_off'
+            discount = total_calc  * cp.percent_off / 100.0
+          elsif cp.type == 'amount_off'
+            discount = cp.amount_off
+          else
+            raise InvalidCouponError
+          end
+
           total_calc = total_calc - discount
 
           # add a row for the coupon

app/services/coupon_apply_service.rb

@@ -1,11 +1,25 @@
 class CouponApplyService
-  def call(total, coupon_code, user_id = nil)
+  ##
+  # Apply the provided coupon, if active, to the given price. Usability tests will be run depending on the
+  # provided parameters.
+  # If no coupon/coupon code or if the code does not match, return origin price without change
+  #
+  # @param total {Number} invoice total, before any coupon is applied
+  # @param coupon {String|Coupon} Coupon's code OR Coupon object
+  # @param user_id {Number} user's id against the coupon will be tested for usability
+  # @return {Number}
+  ##
+  def call(total, coupon, user_id = nil)
     price = total
 
-    # if no coupon code or if code does not match, return origin price without change
-    unless coupon_code.nil?
-      _coupon = Coupon.find_by(code: coupon_code)
-      if not _coupon.nil? and _coupon.status(user_id) == 'active'
+    if coupon.instance_of? Coupon
+      _coupon = coupon
+    elsif coupon.instance_of? String
+      _coupon = Coupon.find_by(code: coupon)
+    end
+
+    unless coupon.nil?
+      if _coupon.status(user_id, total) == 'active'
         if _coupon.type == 'percent_off'
           price = price - (price * _coupon.percent_off / 100.0)
         elsif _coupon.type == 'amount_off'

app/services/statistic_service.rb

@@ -127,7 +127,7 @@ class StatisticService
           if sub
             ca = i.amount.to_i / 100.0
             unless i.invoice.coupon_id.nil?
-              ca = ca - ( ca * i.invoice.coupon.percent_off / 100.0 )
+              ca = CouponApplyService.new(ca, i.invoice.coupon)
             end
             u = sub.user
             p = sub.plan
@@ -353,7 +353,7 @@ class StatisticService
     end
     # subtract coupon discount from invoices and refunds
     unless invoice.coupon_id.nil?
-      ca = ca - ( ca * invoice.coupon.percent_off / 100.0 )
+      ca = CouponApplyService.new(ca, invoice.coupon)
     end
     # divide the result by 100 to convert from centimes to monetary unit
     ca == 0 ? ca : ca / 100.0
@@ -366,7 +366,7 @@ class StatisticService
     end
     # subtract coupon discount from the refund
     unless invoice.coupon_id.nil?
-      ca = ca - ( ca * invoice.coupon.percent_off / 100.0 )
+      ca = CouponApplyService.new(ca, invoice.coupon)
     end
     ca == 0 ? ca : ca / 100.0
   end