Adds ip lookup middleware for cart creation

packages/medusa-plugin-ip-lookup/src/api/medusa-middleware.js

@@ -0,0 +1,36 @@
+export default {
+  preCartCreation: async function (req, res, next) {
+    try {
+      if (req.body.region_id) {
+        next()
+        return
+      }
+
+      const ipLookupService = req.scope.resolve("ipLookupService")
+      const regionService = req.scope.resolve("regionService")
+
+      const ip = req.headers["x-forwarded-for"] || req.connection.remoteAddress
+
+      const { data } = await ipLookupService.lookupIp(ip)
+
+      if (!data.country_code) {
+        next()
+        return
+      }
+
+      // Find region using the country code from ip lookup
+      const regions = await regionService.list({
+        countries: data.country_code,
+      })
+
+      // If this region exists, add it to the body of the cart creation request
+      if (regions[0]) {
+        req.body.region_id = regions[0]._id.toString()
+      }
+
+      next()
+    } catch (error) {
+      next()
+    }
+  },
+}

packages/medusa-plugin-ip-lookup/src/services/ip-lookup.js

@@ -0,0 +1,18 @@
+import { BaseService } from "medusa-interfaces"
+import axios from "axios"
+
+class IpLookupService extends BaseService {
+  constructor({}, options) {
+    super()
+
+    this.options_ = options
+  }
+
+  async lookupIp(ipAddress) {
+    return axios.get(
+      `http://api.ipstack.com/${ipAddress}?access_key=${this.options_.access_token}`
+    )
+  }
+}
+
+export default IpLookupService