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go/src/infra/libs/gitiles/priv_jsonCommitDiff.go

Index: go/src/infra/libs/gitiles/priv_jsonCommitDiff.go
diff --git a/go/src/infra/libs/gitiles/priv_jsonCommitDiff.go b/go/src/infra/libs/gitiles/priv_jsonCommitDiff.go
new file mode 100644
index 0000000000000000000000000000000000000000..0081add1aff36bdc7680b978f5c5d54d038e82d2
--- /dev/null
+++ b/go/src/infra/libs/gitiles/priv_jsonCommitDiff.go
@@ -0,0 +1,63 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package gitiles
+
+import (
+	"infra/libs/git"
+	"strings"
+)
+
+// Private /////////////////////////////////////////////////////////////////////
+
+// Types ///////////////////////////////////////////////////////////////////////
+
+type jsonCommitDiff struct {
+	TreeDiff []struct {
+		Type    string   `json:"type"`
+		OldID   string   `json:"old_id"`
+		OldMode git.Mode `json:"old_mode"`
+		OldPath string   `json:"old_path"`
+		NewID   string   `json:"new_id"`
+		NewMode git.Mode `json:"new_mode"`
+		NewPath string   `json:"new_path"`
+	} `json:"tree_diff"`
+}
+
+// Member functions ////////////////////////////////////////////////////////////
+
+func (c *jsonCommitDiff) ToResult() (git.TreeDiff, error) {
+	td := make(git.TreeDiff, 0, len(c.TreeDiff))
+	for _, ent := range c.TreeDiff {
+		oldID, err := git.MakeObjectIDErr(ent.OldID)
+		if err != nil {
+			return nil, err
+		}
+		newID, err := git.MakeObjectIDErr(ent.NewID)
+		if err != nil {
+			return nil, err
+		}
+		oldChild, err := git.NewEmptyChild(ent.OldMode, oldID)
+		if err != nil {
+			return nil, err
+		}
+		newChild, err := git.NewEmptyChild(ent.NewMode, newID)
+		if err != nil {
+			return nil, err
+		}
+
+		td = append(td, git.TreeDiffEntry{
+			Action: strings.ToUpper(ent.Type[:1]),
+			Old: git.TreeDiffEntryHalf{
+				Child: *oldChild,
+				Name:  ent.OldPath,
+			},
+			New: git.TreeDiffEntryHalf{
+				Child: *newChild,
+				Name:  ent.NewPath,
+			},
+		})
+	}
+	return td, nil
+}