159 lines
3.2 KiB
Go
159 lines
3.2 KiB
Go
/*
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* Copyright (c) 2015 Alex Yatskov <alex@foosoft.net>
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* Author: Alex Yatskov <alex@foosoft.net>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy of
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* this software and associated documentation files (the "Software"), to deal in
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* the Software without restriction, including without limitation the rights to
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* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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* the Software, and to permit persons to whom the Software is furnished to do so,
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* subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all
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* copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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package goldsmith
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import (
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"bytes"
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"io"
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"io/ioutil"
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"os"
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"path"
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)
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type file struct {
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path string
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meta map[string]interface{}
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srcData []byte
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srcReader *bytes.Reader
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srcPath string
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}
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func newFileFromData(path string, srcData []byte) *file {
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return &file{
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path: path,
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meta: make(map[string]interface{}),
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srcData: srcData,
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srcReader: bytes.NewReader(srcData),
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}
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}
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func newFileFromPath(path, srcPath string) *file {
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return &file{
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path: path,
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meta: make(map[string]interface{}),
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srcPath: srcPath,
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}
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}
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func (f *file) rewind() {
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if f.srcReader != nil {
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f.srcReader.Seek(0, os.SEEK_SET)
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}
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}
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func (f *file) export(dstPath string) error {
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if err := os.MkdirAll(path.Dir(dstPath), 0755); err != nil {
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return err
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}
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if err := f.cache(); err != nil {
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return err
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}
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fh, err := os.Create(dstPath)
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if err != nil {
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return err
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}
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defer fh.Close()
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f.rewind()
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if _, err := f.WriteTo(fh); err != nil {
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return err
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}
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return nil
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}
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func (f *file) cache() error {
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if f.srcReader != nil {
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return nil
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}
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data, err := ioutil.ReadFile(f.srcPath)
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if err != nil {
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return err
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}
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f.Rewrite(data)
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return nil
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}
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//
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// File Implementation
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//
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func (f *file) Path() string {
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return f.path
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}
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func (f *file) Rename(path string) {
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f.path = path
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}
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func (f *file) Keys() (keys []string) {
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for key := range f.meta {
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keys = append(keys, key)
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}
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return keys
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}
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func (f *file) Value(key string) (interface{}, bool) {
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value, ok := f.meta[key]
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return value, ok
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}
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func (f *file) SetValue(key string, value interface{}) {
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f.meta[key] = value
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}
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func (f *file) Read(p []byte) (int, error) {
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if err := f.cache(); err != nil {
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return 0, err
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}
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return f.srcReader.Read(p)
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}
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func (f *file) WriteTo(w io.Writer) (int64, error) {
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if err := f.cache(); err != nil {
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return 0, err
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}
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return f.srcReader.WriteTo(w)
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}
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func (f *file) Rewrite(data []byte) {
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f.srcData = data
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f.srcReader = bytes.NewReader(data)
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}
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func (f *file) Bytes() []byte {
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return f.srcData
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}
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func (f *file) Meta() map[string]interface{} {
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return f.meta
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}
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