From aca1270104802347f5aa3104959282924b631daa Mon Sep 17 00:00:00 2001
From: Victor Vieux <victor.vieux@docker.com>
Date: Mon, 13 Jan 2014 11:20:33 -0800
Subject: [PATCH] add legacy compat

Docker-DCO-1.1-Signed-off-by: Victor Vieux <victor.vieux@docker.com> (github: vieux)
---
 api.go        |  1 +
 api_params.go | 36 ------------------------------------
 server.go     | 31 +++++++++++++++++++++++++------
 sorter.go     | 33 ---------------------------------
 4 files changed, 26 insertions(+), 75 deletions(-)

diff --git a/api.go b/api.go
index 7e874c9f12..3bf19fd948 100644
--- a/api.go
+++ b/api.go
@@ -185,6 +185,7 @@ func getImagesJSON(srv *Server, version float64, w http.ResponseWriter, r *http.
 	job.Setenv("filter", r.Form.Get("filter"))
 	job.Setenv("all", r.Form.Get("all"))
 	job.SetenvBool("list", version <= 1.8)
+	job.SetenvBool("legacy", version <= 1.7)
 	job.Stdout.Add(w)
 	w.WriteHeader(http.StatusOK)
 	if err := job.Run(); err != nil {
diff --git a/api_params.go b/api_params.go
index fa9eab0c15..cfe80c8b0b 100644
--- a/api_params.go
+++ b/api_params.go
@@ -1,7 +1,5 @@
 package docker
 
-import "strings"
-
 type (
 	APIHistory struct {
 		ID        string   `json:"Id"`
@@ -11,24 +9,6 @@ type (
 		Size      int64
 	}
 
-	APIImages struct {
-		ID          string   `json:"Id"`
-		RepoTags    []string `json:",omitempty"`
-		Created     int64
-		Size        int64
-		VirtualSize int64
-		ParentId    string `json:",omitempty"`
-	}
-
-	APIImagesOld struct {
-		Repository  string `json:",omitempty"`
-		Tag         string `json:",omitempty"`
-		ID          string `json:"Id"`
-		Created     int64
-		Size        int64
-		VirtualSize int64
-	}
-
 	APITop struct {
 		Titles    []string
 		Processes [][]string
@@ -101,22 +81,6 @@ type (
 	}
 )
 
-func (api APIImages) ToLegacy() []APIImagesOld {
-	outs := []APIImagesOld{}
-	for _, repotag := range api.RepoTags {
-		components := strings.SplitN(repotag, ":", 2)
-		outs = append(outs, APIImagesOld{
-			ID:          api.ID,
-			Repository:  components[0],
-			Tag:         components[1],
-			Created:     api.Created,
-			Size:        api.Size,
-			VirtualSize: api.VirtualSize,
-		})
-	}
-	return outs
-}
-
 func (api APIContainers) ToLegacy() *APIContainersOld {
 	return &APIContainersOld{
 		ID:         api.ID,
diff --git a/server.go b/server.go
index a0c545fbc4..18bda2abd2 100644
--- a/server.go
+++ b/server.go
@@ -601,13 +601,27 @@ func (srv *Server) Images(job *engine.Job) engine.Status {
 			}
 
 			if out, exists := lookup[id]; exists {
-				repotag := fmt.Sprintf("%s:%s", name, tag)
-				out.SetList("RepoTags", append(out.GetList("RepoTags"), repotag))
+				if job.GetenvBool("legacy") {
+					out2 := &engine.Env{}
+					out2.Set("Repository", name)
+					out2.Set("Tag", tag)
+					out2.Set("ID", out.Get("ID"))
+					out2.SetInt64("Created", out.GetInt64("Created"))
+					out2.SetInt64("Size", out.GetInt64("Size"))
+					out2.SetInt64("VirtualSize", out.GetInt64("VirtualSize"))
+				} else {
+					out.SetList("RepoTags", append(out.GetList("RepoTags"), fmt.Sprintf("%s:%s", name, tag)))
+				}
 			} else {
 				out := &engine.Env{}
 				delete(allImages, id)
-				out.Set("ParentId", image.Parent)
-				out.SetList("RepoTags", []string{fmt.Sprintf("%s:%s", name, tag)})
+				if job.GetenvBool("legacy") {
+					out.Set("Repository", name)
+					out.Set("Tag", tag)
+				} else {
+					out.Set("ParentId", image.Parent)
+					out.SetList("RepoTags", []string{fmt.Sprintf("%s:%s", name, tag)})
+				}
 				out.Set("ID", image.ID)
 				out.SetInt64("Created", image.Created.Unix())
 				out.SetInt64("Size", image.Size)
@@ -627,8 +641,13 @@ func (srv *Server) Images(job *engine.Job) engine.Status {
 	if job.Getenv("filter") == "" {
 		for _, image := range allImages {
 			out := &engine.Env{}
-			out.Set("ParentId", image.Parent)
-			out.SetList("RepoTags", []string{"<none>:<none>"})
+			if job.GetenvBool("legacy") {
+				out.Set("Repository", "<none>")
+				out.Set("Tag", "<none>")
+			} else {
+				out.Set("ParentId", image.Parent)
+				out.SetList("RepoTags", []string{"<none>:<none>"})
+			}
 			out.Set("ID", image.ID)
 			out.SetInt64("Created", image.Created.Unix())
 			out.SetInt64("Size", image.Size)
diff --git a/sorter.go b/sorter.go
index c9a86b45c0..9b3e1a9486 100644
--- a/sorter.go
+++ b/sorter.go
@@ -2,39 +2,6 @@ package docker
 
 import "sort"
 
-type imageSorter struct {
-	images []APIImages
-	by     func(i1, i2 *APIImages) bool // Closure used in the Less method.
-}
-
-// Len is part of sort.Interface.
-func (s *imageSorter) Len() int {
-	return len(s.images)
-}
-
-// Swap is part of sort.Interface.
-func (s *imageSorter) Swap(i, j int) {
-	s.images[i], s.images[j] = s.images[j], s.images[i]
-}
-
-// Less is part of sort.Interface. It is implemented by calling the "by" closure in the sorter.
-func (s *imageSorter) Less(i, j int) bool {
-	return s.by(&s.images[i], &s.images[j])
-}
-
-// Sort []ApiImages by most recent creation date and tag name.
-func sortImagesByCreationAndTag(images []APIImages) {
-	creationAndTag := func(i1, i2 *APIImages) bool {
-		return i1.Created > i2.Created
-	}
-
-	sorter := &imageSorter{
-		images: images,
-		by:     creationAndTag}
-
-	sort.Sort(sorter)
-}
-
 type portSorter struct {
 	ports []Port
 	by    func(i, j Port) bool