backend requirements onthe xustomer app

middlewares/city_gate.go

@@ -39,3 +39,21 @@ func CityGateMiddleware(c *fiber.Ctx) error {
 		"code":  "CITY_NOT_SUPPORTED",
 	})
 }
+
+// PincodeInOperatingCity reports whether a pincode falls in a city Doormile
+// runs in, and names it.
+//
+// Exported because the customer app's booking request does not carry a
+// pickuppincode at all — its pickup point is a title/sub/lat/lng from the place
+// search, so CityGateMiddleware's body sniff finds nothing and waves it
+// through. A middleware that silently no-ops on the one caller it matters most
+// for is worse than no middleware, so the customer handler resolves the pickup
+// point to a pincode itself and asks this directly.
+func PincodeInOperatingCity(pincode string) (string, bool) {
+	pincode = strings.TrimSpace(pincode)
+	if len(pincode) < 3 {
+		return "", false
+	}
+	city, ok := operatingCityPrefixes[pincode[:3]]
+	return city, ok
+}