From ded21a4051161967f0d730197b239c7256c765ea Mon Sep 17 00:00:00 2001
From: Henrique Dias <hacdias@gmail.com>
Date: Wed, 6 Sep 2023 10:34:17 +0200
Subject: [PATCH] feat: add ipns.Name.AsPath

---
 ipns/name.go      | 10 ++++++++++
 ipns/name_test.go | 11 +++++++++++
 path/path.go      |  2 +-
 3 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/ipns/name.go b/ipns/name.go
index 2a6bbdbf4..5f8be3299 100644
--- a/ipns/name.go
+++ b/ipns/name.go
@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"strings"
 
+	"github.com/ipfs/boxo/path"
 	"github.com/ipfs/go-cid"
 	"github.com/libp2p/go-libp2p/core/peer"
 	mb "github.com/multiformats/go-multibase"
@@ -133,3 +134,12 @@ func (n Name) MarshalJSON() ([]byte, error) {
 func (n Name) Equal(other Name) bool {
 	return bytes.Equal(n.src, other.src)
 }
+
+// AsPath returns the IPNS Name as a [path.Path] prefixed by [path.IPNSNamespace].
+func (n Name) AsPath() path.Path {
+	p, err := path.NewPathFromSegments(path.IPNSNamespace.String(), n.String())
+	if err != nil {
+		panic(fmt.Errorf("path.NewPathFromSegments was called with invalid parameters: %w", err))
+	}
+	return p
+}
diff --git a/ipns/name_test.go b/ipns/name_test.go
index 4b8ccd414..c3c31878c 100644
--- a/ipns/name_test.go
+++ b/ipns/name_test.go
@@ -34,6 +34,16 @@ func TestName(t *testing.T) {
 		})
 	}
 
+	testPath := func(t *testing.T, name, input, expected string) {
+		t.Run("AsPath method: "+name, func(t *testing.T) {
+			t.Parallel()
+
+			name, err := NameFromString(input)
+			require.NoError(t, err)
+			require.Equal(t, expected, name.AsPath().String())
+		})
+	}
+
 	testMarshalJSON := func(t *testing.T, name, input, expected string) {
 		t.Run("Marshal JSON: "+name, func(t *testing.T) {
 			t.Parallel()
@@ -66,6 +76,7 @@ func TestName(t *testing.T) {
 		testFromCid(t, v[0], v[2], v[2])
 		testString(t, v[0], v[1], v[2])
 		testString(t, v[0], NamespacePrefix+v[1], v[2])
+		testPath(t, v[0], v[1], NamespacePrefix+v[2])
 		testMarshalJSON(t, v[0], v[1], `"`+v[2]+`"`)
 		testMarshalJSON(t, v[0], NamespacePrefix+v[1], `"`+v[2]+`"`)
 		testUnmarshalJSON(t, v[0], []byte(`"`+v[2]+`"`), v[2])
diff --git a/path/path.go b/path/path.go
index 4230e298a..172f9dce5 100644
--- a/path/path.go
+++ b/path/path.go
@@ -44,7 +44,7 @@ const (
 //
 //  1. Namespace is "ipfs", "ipld", or "ipns".
 //  2. If namespace is "ipfs" or "ipld", "root" must be a valid [cid.Cid].
-//  3. If namespace is "ipns", "root" may be a [ipns.Name] or a DNSLink FQDN.
+//  3. If namespace is "ipns", "root" may be a [ipns.Name] or a [DNSLink] FQDN.
 //
 // [DNSLink]: https://dnslink.dev/
 type Path interface {