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https://github.com/thebaer/cdr.git
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Matt Baer
29d369f5ae
Instead of taking a filename as an argument, we now change all files in the current directory.
54 lines
1.1 KiB
Go
54 lines
1.1 KiB
Go
package cdr
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import (
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"fmt"
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"log"
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"os"
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"regexp"
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"strings"
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"unicode"
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"github.com/dhowden/tag"
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)
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var trackNameReg = regexp.MustCompile("^([0-9]{2}).+")
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// RenameTrack takes a filename, opens it, reads the metadata, and returns both
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// the old and new filename.
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func RenameTrack(file string) string {
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f, err := os.Open(file)
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if err != nil {
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fmt.Printf("error loading file: %v", err)
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return ""
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}
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defer f.Close()
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fName := f.Name()
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fMatch := trackNameReg.FindStringSubmatch(fName)
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if len(fMatch) < 2 {
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log.Fatal("Unexpect filename format")
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}
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trackNum := fMatch[1]
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ext := fName[strings.LastIndex(fName, "."):]
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m, err := tag.ReadFrom(f)
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if err != nil {
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log.Fatal(err)
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}
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return fmt.Sprintf("%s-%s-%s%s", trackNum, Sanitize(m.Artist()), Sanitize(m.Title()), ext)
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}
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// Sanitize takes a string and removes problematic characters from it.
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func Sanitize(s string) string {
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s = strings.Map(func(r rune) rune {
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if r == '(' || r == ')' || r == '[' || r == ']' || r == '.' {
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return -1
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}
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if unicode.IsSpace(r) {
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return '_'
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}
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return r
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}, s)
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return s
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}
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