From 23ba57e6a81d74e6629443570f9dcae8b8327c11 Mon Sep 17 00:00:00 2001
From: Alex Yatskov <alex@foosoft.net>
Date: Tue, 29 Dec 2015 21:08:41 +0900
Subject: [PATCH] Hiding the Meta parameter

---
 file.go  | 18 ++++++++++++------
 types.go |  9 +++++----
 2 files changed, 17 insertions(+), 10 deletions(-)

diff --git a/file.go b/file.go
index 463f8d7..719fd28 100644
--- a/file.go
+++ b/file.go
@@ -32,7 +32,7 @@ import (
 
 type file struct {
 	path string
-	meta map[string]interface{}
+	Meta map[string]interface{}
 
 	reader *bytes.Reader
 	asset  string
@@ -93,13 +93,19 @@ func (f *file) Path() string {
 	return f.path
 }
 
-func (f *file) Meta() map[string]interface{} {
-	return f.meta
+func (f *file) Value(key string) (interface{}, bool) {
+	value, ok := f.Meta[key]
+	return value, ok
 }
 
-func (f *file) Apply(m map[string]interface{}) {
-	for key, value := range m {
-		f.meta[key] = value
+func (f *file) SetValue(key string, value interface{}) {
+	f.Meta[key] = value
+}
+
+func (f *file) CopyValues(src File) {
+	rf := src.(*file)
+	for name, value := range rf.Meta {
+		f.SetValue(name, value)
 	}
 }
 
diff --git a/types.go b/types.go
index 0a3ad02..2451a9a 100644
--- a/types.go
+++ b/types.go
@@ -46,8 +46,9 @@ func New(srcDir, dstDir string) Goldsmith {
 type File interface {
 	Path() string
 
-	Meta() map[string]interface{}
-	Apply(m map[string]interface{})
+	Value(key string) (interface{}, bool)
+	SetValue(key string, value interface{})
+	CopyValues(src File)
 
 	Read(p []byte) (int, error)
 	WriteTo(w io.Writer) (int64, error)
@@ -57,7 +58,7 @@ type File interface {
 func NewFileFromData(path string, data []byte) File {
 	return &file{
 		path:   path,
-		meta:   make(map[string]interface{}),
+		Meta:   make(map[string]interface{}),
 		reader: bytes.NewReader(data),
 	}
 }
@@ -65,7 +66,7 @@ func NewFileFromData(path string, data []byte) File {
 func NewFileFromAsset(path, asset string) File {
 	return &file{
 		path:  path,
-		meta:  make(map[string]interface{}),
+		Meta:  make(map[string]interface{}),
 		asset: asset,
 	}
 }