From 946e77e9eee58404e5cfe181ade9f9732271e927 Mon Sep 17 00:00:00 2001
From: Alex Yatskov <alex@foosoft.net>
Date: Thu, 29 Oct 2015 22:07:27 +0900
Subject: [PATCH] WIP

---
 cmd/main.go  |  4 +---
 core.go      | 39 +++++++++++++++++++++++++++++++++------
 goldsmith.go | 15 +++++++++++----
 3 files changed, 45 insertions(+), 13 deletions(-)

diff --git a/cmd/main.go b/cmd/main.go
index 1748e60..6c599e9 100644
--- a/cmd/main.go
+++ b/cmd/main.go
@@ -22,9 +22,7 @@
 
 package main
 
-import "github.com/FooSoft/goldsmith"
+import _ "github.com/FooSoft/goldsmith"
 
 func main() {
-	gs := goldsmith.NewGoldsmith("", "")
-	gs.Use(nil)
 }
diff --git a/core.go b/core.go
index 1a0fd77..a3f3190 100644
--- a/core.go
+++ b/core.go
@@ -23,6 +23,7 @@
 package goldsmith
 
 import (
+	"bytes"
 	"path/filepath"
 	"sync"
 
@@ -30,17 +31,43 @@ import (
 )
 
 type stage struct {
-	input  chan File
-	output chan File
+	input  chan file
+	output chan file
+}
+
+type file struct {
+	path string
+	meta map[string]interface{}
 }
 
 type goldsmith struct {
 	srcPath, dstPath string
 	stages           []stage
-	files            chan File
+	files            chan file
 	wg               sync.WaitGroup
 }
 
+func (f *file) Path() string {
+	return f.path
+}
+
+func (f *file) SetPath(path string) {
+	f.path = path
+}
+
+func (f *file) Meta(key string) (interface{}, bool) {
+	value, ok := f.meta[key]
+	return value, ok
+}
+
+func (f *file) SetMeta(key string, value interface{}) {
+	f.meta[key] = value
+}
+
+func (f *file) Data() (*bytes.Buffer, error) {
+	return nil, nil
+}
+
 func NewGoldsmith(srcPath, dstPath string) (Applier, error) {
 	gs := &goldsmith{srcPath: srcPath, dstPath: dstPath}
 	if err := gs.scan(); err != nil {
@@ -56,7 +83,7 @@ func (gs *goldsmith) scan() error {
 		return err
 	}
 
-	gs.files = make(chan File, len(matches))
+	gs.files = make(chan file, len(matches))
 
 	for _, match := range matches {
 		path, err := filepath.Rel(gs.srcPath, match)
@@ -64,14 +91,14 @@ func (gs *goldsmith) scan() error {
 			return err
 		}
 
-		gs.files <- File{path, make(map[string]interface{})}
+		gs.files <- file{path, make(map[string]interface{})}
 	}
 
 	return nil
 }
 
 func (gs *goldsmith) stage() stage {
-	s := stage{output: make(chan File)}
+	s := stage{output: make(chan file)}
 	if len(gs.stages) == 0 {
 		s.input = gs.files
 	} else {
diff --git a/goldsmith.go b/goldsmith.go
index 951ad5d..44ab091 100644
--- a/goldsmith.go
+++ b/goldsmith.go
@@ -22,18 +22,25 @@
 
 package goldsmith
 
+import "bytes"
+
 type Context interface {
 	AbsSrcPath(path string) string
 	AbsDstPath(path string) string
 }
 
-type File struct {
-	Path string
-	Meta map[string]interface{}
+type File interface {
+	Path() string
+	SetPath(path string)
+
+	Meta(key string) (interface{}, bool)
+	SetMeta(key string, value interface{})
+
+	Data() (*bytes.Buffer, error)
 }
 
 type Processor interface {
-	Process(ctx Context, input chan File, output chan File) error
+	Process(ctx Context, input chan file, output chan file) error
 }
 
 type Applier interface {