fix: allow swaps with total < 0 (#143)

packages/medusa-plugin-brightpearl/src/services/brightpearl.js

@@ -477,7 +477,7 @@ class BrightpearlService extends BaseService {
     const soId =
       fromSwap.metadata && fromSwap.metadata.brightpearl_sales_order_id
 
-    if (!soId) {
+    if (!soId || fromSwap.amount_paid <= 0) {
       return
     }
 
@@ -558,6 +558,10 @@ class BrightpearlService extends BaseService {
       const order = await client.orders.retrieve(salesOrderId)
       await client.warehouses.createReservation(order, this.options.warehouse)
 
+      const total = order.rows.reduce((acc, next) => {
+        return acc + parseFloat(next.net) + parseFloat(next.tax)
+      }, 0)
+
       const paymentMethod = fromOrder.payment_method
       const paymentType = "RECEIPT"
       const payment = {
@@ -566,7 +570,7 @@ class BrightpearlService extends BaseService {
         paymentMethodCode: this.options.payment_method_code || "1220",
         orderId: salesOrderId,
         currencyIsoCode: fromOrder.currency_code,
-        amountPaid: fromSwap.return.refund_amount,
+        amountPaid: total,
         paymentDate: new Date(),
         paymentType,
       }

packages/medusa/src/api/routes/admin/orders/index.js

@@ -128,8 +128,8 @@ export default app => {
    * Captures the payment associated with a swap
    */
   route.post(
-    "/:id/swaps/:swap_id/capture",
+    "/:id/swaps/:swap_id/process-payment",
-    middlewares.wrap(require("./capture-swap").default)
+    middlewares.wrap(require("./process-swap-payment").default)
   )
 
   /**

packages/medusa/src/api/routes/admin/orders/process-swap-payment.js

@@ -7,7 +7,7 @@ export default async (req, res) => {
 
     const order = await orderService.retrieve(id)
 
-    await swapService.capturePayment(swap_id)
+    await swapService.processDifference(swap_id)
 
     // Decorate the order
     const data = await orderService.decorate(

packages/medusa/src/models/swap.js

@@ -25,6 +25,7 @@ class SwapModel extends BaseModel {
     amount_paid: { type: Number },
     region_id: { type: String },
     currency_code: { type: String },
+    order_payment: { type: PaymentMethodSchema },
     order_id: { type: String },
     cart_id: { type: String },
     created: { type: String, default: Date.now },

packages/medusa/src/services/swap.js

@@ -12,6 +12,8 @@ class SwapService extends BaseService {
     PAYMENT_COMPLETED: "swap.payment_completed",
     PAYMENT_CAPTURED: "swap.payment_captured",
     PAYMENT_CAPTURE_FAILED: "swap.payment_capture_failed",
+    PROCESS_REFUND_FAILED: "swap.process_refund_failed",
+    REFUND_PROCESSED: "swap.refund_processed",
   }
 
   constructor({
@@ -189,6 +191,7 @@ class SwapService extends BaseService {
 
     return this.swapModel_.create({
       order_id: order._id,
+      order_payment: order.payment_method,
       region_id: order.region_id,
       currency_code: order.currency_code,
       return_items: validatedReturnItems,
@@ -197,6 +200,70 @@ class SwapService extends BaseService {
     })
   }
 
+  async processDifference(swapId) {
+    const swap = await this.retrieve(swapId)
+
+    if (!swap.is_paid) {
+      throw new MedusaError(
+        MedusaError.Types.NOT_ALLOWED,
+        "Cannot process a swap that hasn't been confirmed by the customer"
+      )
+    }
+
+    if (swap.amount_paid < 0) {
+      const { provider_id, data } = swap.order_payment
+      const paymentProvider = this.paymentProviderService_.retrieveProvider(
+        provider_id
+      )
+
+      try {
+        await paymentProvider.refundPayment(data, -1 * swap.amount_paid)
+      } catch (err) {
+        return this.swapModel_
+          .updateOne(
+            {
+              _id: swapId,
+            },
+            {
+              $set: { payment_status: "requires_action" },
+            }
+          )
+          .then(result => {
+            this.eventBus_.emit(
+              SwapService.Events.PROCESS_REFUND_FAILED,
+              result
+            )
+            return result
+          })
+      }
+
+      return this.swapModel_
+        .updateOne(
+          {
+            _id: swapId,
+          },
+          {
+            $set: { payment_status: "difference_refunded" },
+          }
+        )
+        .then(result => {
+          this.eventBus_.emit(SwapService.Events.REFUND_PROCESSED, result)
+          return result
+        })
+    } else if (swap.amount_paid === 0) {
+      return this.swapModel_.updateOne(
+        {
+          _id: swapId,
+        },
+        {
+          $set: { payment_status: "difference_refunded" },
+        }
+      )
+    }
+
+    return capturePayment(swapId)
+  }
+
   async capturePayment(swapId) {
     const swap = await this.retrieve(swapId)
 
@@ -351,6 +418,11 @@ class SwapService extends BaseService {
       )
     }
 
+    const total = await this.totalsService_.getTotal(cart)
+
+    let payment = {}
+
+    if (total > 0) {
       let paymentSession = {}
       let paymentData = {}
       const { payment_method, payment_sessions } = cart
@@ -396,15 +468,13 @@ class SwapService extends BaseService {
 
       paymentData = await paymentProvider.retrievePayment(paymentSession.data)
 
-    let payment = {}
       if (paymentSession.provider_id) {
         payment = {
           provider_id: paymentSession.provider_id,
           data: paymentData,
         }
       }
-
+    }
-    const total = await this.totalsService_.getTotal(cart)
 
     return this.swapModel_
       .updateOne(