60 lines
1.8 KiB
Go
60 lines
1.8 KiB
Go
package middlewares
|
|
|
|
import (
|
|
"encoding/json"
|
|
"strings"
|
|
|
|
"github.com/gofiber/fiber/v2"
|
|
)
|
|
|
|
// operatingCityPrefixes maps supported 3-digit pincode prefixes to city names.
|
|
var operatingCityPrefixes = map[string]string{
|
|
"641": "Coimbatore",
|
|
"600": "Chennai",
|
|
"560": "Bengaluru",
|
|
"500": "Hyderabad",
|
|
"629": "Nagercoil",
|
|
}
|
|
|
|
// CityGateMiddleware rejects bookings from pincodes outside Doormile's operating cities.
|
|
// It reads pickuppincode from the JSON body without consuming it, so the downstream
|
|
// controller can still call c.BodyParser() as usual.
|
|
func CityGateMiddleware(c *fiber.Ctx) error {
|
|
var body struct {
|
|
Pickuppincode string `json:"pickuppincode"`
|
|
}
|
|
if err := json.Unmarshal(c.Body(), &body); err != nil || body.Pickuppincode == "" {
|
|
return c.Next()
|
|
}
|
|
|
|
pincode := strings.TrimSpace(body.Pickuppincode)
|
|
if len(pincode) >= 3 {
|
|
if _, ok := operatingCityPrefixes[pincode[:3]]; ok {
|
|
return c.Next()
|
|
}
|
|
}
|
|
|
|
return c.Status(fiber.StatusBadRequest).JSON(fiber.Map{
|
|
"error": "We are not yet operating in your city. Stay tuned!",
|
|
"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
|
|
}
|