From b808f144b5b65e02307e0de0624deba9758d529e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=C5=81ukasz=20Magiera?= <magik6k@gmail.com>
Date: Tue, 12 Jun 2018 03:52:26 +0200
Subject: [PATCH] coreapi: move path utils to interface
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License: MIT
Signed-off-by: Łukasz Magiera <magik6k@gmail.com>


This commit was moved from ipfs/interface-go-ipfs-core@0a0e69cc424e6136e8f0a1fecabda94e7854bc7f

This commit was moved from ipfs/boxo@92ebd6eb7be417dec28e3c8fbc0f0bb4db65d268
---
 core/coreiface/coreapi.go | 10 -----
 core/coreiface/path.go    | 87 +++++++++++++++++++++++++++++++++++++++
 2 files changed, 87 insertions(+), 10 deletions(-)

diff --git a/core/coreiface/coreapi.go b/core/coreiface/coreapi.go
index f5e81adce..82a2ebf4e 100644
--- a/core/coreiface/coreapi.go
+++ b/core/coreiface/coreapi.go
@@ -6,7 +6,6 @@ import (
 	"context"
 
 	ipld "gx/ipfs/QmZtNq8dArGfnpCZfx2pUNY7UcjGhVp5qqwQ4hH6mpTMRQ/go-ipld-format"
-	cid "gx/ipfs/QmapdYm1b22Frv3k17fqrBYTFRxwiaVJkB299Mfn33edeB/go-cid"
 )
 
 // CoreAPI defines an unified interface to IPFS for Go programs
@@ -38,13 +37,4 @@ type CoreAPI interface {
 	// ResolveNode resolves the path (if not resolved already) using Unixfs
 	// resolver, gets and returns the resolved Node
 	ResolveNode(context.Context, Path) (ipld.Node, error)
-
-	// ParsePath parses string path to a Path
-	ParsePath(string) (Path, error)
-
-	// IpfsPath creates new /ipfs path from the provided CID
-	IpfsPath(*cid.Cid) ResolvedPath
-
-	// IpldPath creates new /ipld path from the provided CID
-	IpldPath(*cid.Cid) ResolvedPath
 }
diff --git a/core/coreiface/path.go b/core/coreiface/path.go
index acdcd85da..e097ea3b6 100644
--- a/core/coreiface/path.go
+++ b/core/coreiface/path.go
@@ -1,9 +1,13 @@
 package iface
 
 import (
+	ipfspath "github.com/ipfs/go-ipfs/path"
+
 	cid "gx/ipfs/QmYVNvtQkeZ6AKSwDrjQTs432QtL6umrrK41EBq3cu7iSP/go-cid"
 )
 
+//TODO: merge with ipfspath so we don't depend on it
+
 // Path is a generic wrapper for paths used in the API. A path can be resolved
 // to a CID using one of Resolve functions in the API.
 //
@@ -87,3 +91,86 @@ type ResolvedPath interface {
 
 	Path
 }
+
+// path implements coreiface.Path
+type path struct {
+	path ipfspath.Path
+}
+
+// resolvedPath implements coreiface.resolvedPath
+type resolvedPath struct {
+	path
+	cid       *cid.Cid
+	root      *cid.Cid
+	remainder string
+}
+
+// IpfsPath creates new /ipfs path from the provided CID
+func IpfsPath(c *cid.Cid) ResolvedPath {
+	return &resolvedPath{
+		path:      path{ipfspath.Path("/ipfs/" + c.String())},
+		cid:       c,
+		root:      c,
+		remainder: "",
+	}
+}
+
+// IpldPath creates new /ipld path from the provided CID
+func IpldPath(c *cid.Cid) ResolvedPath {
+	return &resolvedPath{
+		path:      path{ipfspath.Path("/ipld/" + c.String())},
+		cid:       c,
+		root:      c,
+		remainder: "",
+	}
+}
+
+// ParsePath parses string path to a Path
+func ParsePath(p string) (Path, error) {
+	pp, err := ipfspath.ParsePath(p)
+	if err != nil {
+		return nil, err
+	}
+
+	return &path{path: pp}, nil
+}
+
+// NewResolvedPath creates new ResolvedPath. This function performs no checks
+// and is intended to be used by resolver implementations. Incorrect inputs may
+// cause panics. Handle with care.
+func NewResolvedPath(ipath ipfspath.Path, c *cid.Cid, root *cid.Cid, remainder string) ResolvedPath {
+	return &resolvedPath{
+		path:      path{ipath},
+		cid:       c,
+		root:      root,
+		remainder: remainder,
+	}
+}
+
+func (p *path) String() string {
+	return p.path.String()
+}
+
+func (p *path) Namespace() string {
+	if len(p.path.Segments()) < 1 {
+		panic("path without namespace") //this shouldn't happen under any scenario
+	}
+	return p.path.Segments()[0]
+}
+
+func (p *path) Mutable() bool {
+	//TODO: MFS: check for /local
+	return p.Namespace() == "ipns"
+}
+
+func (p *resolvedPath) Cid() *cid.Cid {
+	return p.cid
+}
+
+func (p *resolvedPath) Root() *cid.Cid {
+	return p.root
+}
+
+func (p *resolvedPath) Remainder() string {
+	return p.remainder
+}