Protect IPv6 last two octet

gdpr/protect_ip.go

@@ -3,6 +3,7 @@ package gdpr
 import (
 	"encoding/binary"
 	"net"
+	"net/netip"
 
 	"github.com/msales/gox/netx"
 )
@@ -19,7 +20,18 @@ func ProtectIP[T IP](ip T) string {
 	case net.IP:
 		// if IP is v6, we don't do anything with it.
 		if cIP.To4() == nil {
-			return ""
+			cIP[12] = 0
+			cIP[13] = 0
+			cIP[14] = 0
+			cIP[15] = 0
+
+			addr, err := netip.ParseAddr(cIP.String())
+			// if there is an error, we don't do anything, we return empty value because something is wrong with passed ip
+			if err != nil {
+				return ""
+			}
+
+			return addr.StringExpanded()
 		}
 
 		// if ip is somehow empty, return empty string

gdpr/protect_ip_test.go

@@ -100,7 +100,7 @@ func Test_ProtectIP_String(t *testing.T) {
 		{
 			name: "raw ip v6",
 			ip:   "2001:0000:130F:0000:0000:09C0:876A:130B",
-			want: "2001:0000:130F:0000:0000:09C0:0000:0000",
+			want: "2001:0000:130f:0000:0000:09c0:0000:0000",
 		},
 	}
 	for _, tt := range tests {