/
sort.go
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/
sort.go
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// Copyright © 2018 Herbert Muehlburger <mail@muehlburger.at>
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package cmd
import (
"fmt"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"strings"
"time"
"github.com/rwcarlsen/goexif/exif"
"github.com/rwcarlsen/goexif/mknote"
"github.com/spf13/cobra"
)
// sortCmd represents the sort command
var sortCmd = &cobra.Command{
Use: "sort",
Short: "Sorts photos using EXIF information and copies them to a sorted folder.",
RunE: func(cmd *cobra.Command, args []string) error {
dst, err := cmd.Flags().GetString("dst")
if err != nil {
return err
}
src, err := cmd.Flags().GetStringSlice("src")
if err != nil {
return err
}
verbose, err := cmd.Flags().GetBool("verbose")
if err != nil {
return err
}
return sort(src, dst, verbose)
},
}
func init() {
sortCmd.Flags().StringP("dst", "d", "sorted", "Path to the target directory")
sortCmd.Flags().StringSliceP("src", "s", []string{"."}, "Paths to source directories")
sortCmd.Flags().BoolP("verbose", "v", false, "Show verbose progress messages")
rootCmd.AddCommand(sortCmd)
}
var supportedExtensions = map[string]bool{
".jpg": true,
".jpeg": true,
}
func sort(roots []string, dst string, verbose bool) error {
// Traverse the file tree.
paths := make(chan string)
go func() {
for _, root := range roots {
err := walkDir(root, paths)
if err != nil {
fmt.Printf("psort %s: %v\n", root, err)
}
}
close(paths)
}()
// Print the results periodically.
var tick <-chan time.Time
if verbose {
tick = time.Tick(500 * time.Millisecond)
}
var nfiles int64
var names []string
loop:
for {
select {
case name, ok := <-paths:
if !ok {
break loop // paths was closed
}
nfiles++
if _, ok := supportedExtensions[strings.ToLower(filepath.Ext(name))]; ok {
names = append(names, name)
}
case <-tick:
fmt.Printf("%d files\n", nfiles)
}
}
if nfiles > 0 {
if err := os.MkdirAll(dst, 0755); err != nil {
return err
}
}
for _, f := range names {
if err := CopyFile(f, dst); err != nil {
return err
}
}
return nil
}
// CopyFile copies files from src to destination.
func CopyFile(src, dst string) error {
in, err := os.Open(src)
if err != nil {
return err
}
defer in.Close()
dstFilename, err := dstFilename(src)
if err != nil {
return err
}
outfile := filepath.Join(dst, dstFilename)
log.Printf("%s -> %s", src, outfile)
out, err := os.OpenFile(outfile, os.O_RDWR|os.O_CREATE, 0744)
if err != nil {
return err
}
defer func() {
if e := out.Close(); e != nil {
err = e
}
}()
_, err = io.Copy(out, in)
fi, err := os.Stat(in.Name())
if err != nil {
return err
}
if err = os.Chmod(out.Name(), fi.Mode()); err != nil {
os.Remove(out.Name())
return err
}
if err = os.Chtimes(out.Name(), fi.ModTime(), fi.ModTime()); err != nil {
os.Remove(out.Name())
return err
}
return nil
}
func dstFilename(file string) (string, error) {
tm, err := getCreationDatetime(file)
if err != nil {
return "", err
}
ext := strings.ToLower(filepath.Ext(file)) // e.g., ".jpg", ".JPEG"
outfile := fmt.Sprintf("%d-%02d-%02d_%02d%02d%02d%s", tm.Year(), tm.Month(), tm.Day(), tm.Hour(), tm.Minute(), tm.Second(), ext)
outfile = filepath.Base(outfile)
return outfile, nil
}
// CreationTime extracts the creation Date of the given File.
func getCreationDatetime(path string) (time.Time, error) {
f, err := os.Open(path)
if err != nil {
return time.Time{}, err
}
defer f.Close()
exif.RegisterParsers(mknote.All...)
x, err := exif.Decode(f)
if err != nil {
return time.Time{}, err
}
tm, err := x.DateTime()
if err != nil {
return time.Time{}, err
}
return tm, nil
}
// walkDir recursively walks the file tree rooted at dir
// and sends the absolute path of each found file on paths.
func walkDir(dir string, paths chan<- string) error {
fis, err := ioutil.ReadDir(dir)
if err != nil {
return fmt.Errorf("could not read dir %s: %v", dir, err)
}
for _, fi := range fis {
if !fi.IsDir() {
path, err := filepath.Abs(filepath.Join(dir, fi.Name()))
if err != nil {
log.Fatal(err)
}
paths <- path
} else {
walkDir(filepath.Join(dir, fi.Name()), paths)
}
}
return nil
}