add cancel oxxo payment

@@ -38,9 +38,7 @@ module Var
   end
 
   def self.find_charge(id)
-    if Rails.env.development?
-      Rails.application.eager_load!
-    end
+    Rails.application.eager_load! if Rails.env.development?
     @@var_classes.map do |class_name|
       class_name.where(var_id: id)
     end.flatten.first
@@ -116,8 +114,8 @@ module ActsAsChargeable
     end
 
     def manual_charge
-      self.update_columns(var_service: 'manual', var_status: 'paid',
-                          var_payment_at: Time.zone.now)
+      update_columns(var_service: 'manual', var_status: 'paid',
+                     var_payment_at: Time.zone.now)
       # TODO: Create a new table with transaction
     end
 
@@ -179,11 +177,6 @@ module ActsAsChargeable
       send(service_attributes[key.to_sym])
     end
 
-    # def sync_attribute(key)
-    #   return self.send(key) unless self.sync_attributes.include? key.to_sym
-    #   self.send(sync_attributes[key.to_sym])
-    # end
-
     def conekta_attributes
       sync_attributes[:conekta] || {}
     end
@@ -195,6 +188,27 @@ module ActsAsChargeable
     def var_payed?
       var_status == 'paid'
     end
+
+    def cancel_oxxo_payment
+      return { error_message: 'Already paid' } if var_payed?
+      return { error_message: 'Not charged yet' } unless var_service
+      return { error_message: 'Not charged with oxxo' } unless barcode
+      charge = find_charge
+      if charge.status == 'paid'
+        update_columns(var_status: 'paid',
+                       var_payment_at: Time.zone.at(charge.paid_at))
+        return { error_message: 'Already paid' }
+      end
+      clean_var_variables
+    end
+
+    private
+
+    def clean_var_variables
+      update_columns(var_status: nil, var_barcode: nil, var_barcode_url: nil,
+                     var_id: nil, var_service: nil, var_payment_at: nil,
+                     var_payment_expires_at: nil)
+    end
   end
 end
 

 # Var Version
 module Var
-  VERSION = '0.2.15'
+  VERSION = '0.2.16'
 end