Fix/enhanced tracking (#127)

* fix: adds tracking of returns and cancellations

* fix: adds tracking of returns and cancellations

packages/medusa-plugin-segment/src/subscribers/order.js

@@ -1,5 +1,49 @@
 class OrderSubscriber {
   constructor({ segmentService, eventBusService }) {
+    eventBusService.subscribe(
+      "order.items_returned",
+      async ({ order, return: ret }) => {
+        const shipping = []
+        if (ret.shipping_method && ret.shipping_method.price) {
+          shipping.push({
+            ...ret.shipping_method,
+            price: -1 * ret.shipping_method.price,
+          })
+        }
+
+        const toBuildFrom = {
+          ...order,
+          shipping_methods: shipping,
+          items: ret.items.map((i) =>
+            order.items.find((l) => l._id === i.item_id)
+          ),
+        }
+
+        const orderData = await segmentService.buildOrder(toBuildFrom)
+        const orderEvent = {
+          event: "Order Refunded",
+          userId: order.customer_id,
+          properties: orderData,
+          timestamp: new Date(),
+        }
+
+        segmentService.track(orderEvent)
+      }
+    )
+
+    eventBusService.subscribe("order.canceled", async (order) => {
+      const date = new Date()
+      const orderData = await segmentService.buildOrder(order)
+      const orderEvent = {
+        event: "Order Cancelled",
+        userId: order.customer_id,
+        properties: orderData,
+        timestamp: date,
+      }
+
+      segmentService.track(orderEvent)
+    })
+
     eventBusService.subscribe("order.placed", async (order) => {
       const date = new Date(parseInt(order.created))
       const orderData = await segmentService.buildOrder(order)