Adds gift card support

packages/medusa/src/subscribers/order.js

@@ -4,9 +4,17 @@ class OrderSubscriber {
     cartService,
     customerService,
     eventBusService,
+    discountService,
+    totalsService,
   }) {
+    this.totalsService_ = totalsService
+
     this.paymentProviderService_ = paymentProviderService
+
     this.customerService_ = customerService
+
+    this.discountService_ = discountService
+
     this.cartService_ = cartService
 
     this.eventBus_ = eventBusService
@@ -33,6 +41,34 @@ class OrderSubscriber {
     this.eventBus_.subscribe("order.placed", async order => {
       await this.cartService_.delete(order.cart_id)
     })
+
+    this.eventBus_.subscribe("order.placed", this.handleDiscounts)
+  }
+
+  handleDiscounts = async order => {
+    await Promise.all(
+      order.discounts.map(async d => {
+        const subtotal = await this.totalsService_.getSubtotal(order)
+        if (d.is_giftcard) {
+          const discountRule = {
+            ...d.discount_rule,
+            value: Math.max(0, d.discount_rule.value - subtotal),
+          }
+
+          delete discountRule._id
+
+          return this.discountService_.update(d._id, {
+            discount_rule: discountRule,
+            usage_count: d.usage_count + 1,
+            disabled: discountRule.value === 0,
+          })
+        } else {
+          return this.discountService_.update(d._id, {
+            usage_count: d.usage_count + 1,
+          })
+        }
+      })
+    )
   }
 }