/
database.go
121 lines (98 loc) · 2.09 KB
/
database.go
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package serato
import (
"fmt"
"io"
"os"
"github.com/kaubry/serato_tools/encoding"
"github.com/kaubry/serato_tools/files"
"github.com/kaubry/serato_tools/logger"
)
type Database struct {
vrsn []byte //Version
Dmfs []DatabaseMusicFile
}
func NewDatabase(f *os.File) (*Database, error) {
vrsn, err := files.ReadBytesWithDynamicLength(f, 4, 4)
if err != nil {
return nil, err
}
dmfs, err := readDatabaseMusicFiles(f)
if err != nil {
return nil, err
}
database := Database{
vrsn: vrsn,
Dmfs: dmfs,
}
return &database, nil
}
func readDatabaseMusicFiles(f *os.File) ([]DatabaseMusicFile, error) {
var df []DatabaseMusicFile
for {
_, err := files.ReadBytes(f, 1)
if err != nil {
if err == io.EOF {
break
}
return nil, err
}
_, err = f.Seek(-1, 1)
if err != nil {
return nil, err
}
mf, err := ReadMusicFile(f)
if err != nil {
return nil, err
}
df = append(df, mf)
}
return df, nil
}
func (d *Database) GetBytes() []byte {
var output []byte
output = append(output, []byte("vrsn")...)
output = append(output, files.GetBytesWithDynamicLength(d.vrsn, 4)...)
//MusicFiles
for _, dmf := range d.Dmfs {
output = append(output, dmf.GetBytes()...)
}
return output
}
func (d *Database) String() string {
return fmt.Sprintf("Vrsn: %s\n", d.getVrsn())
}
func (d *Database) getVrsn() string {
s, _ := encoding.DecodeUTF16(d.vrsn)
return s
}
func (d *Database) GetMusicFiles() []string {
var output []string
for _, dmf := range d.Dmfs {
s, err := dmf.getFilePath()
if err != nil {
logger.Logger.Error(err.Error())
} else {
output = append(output, s)
}
}
return output
}
func (d *Database) RemoveMusicFile(path string) {
if i := d.IndexOfMusicFile(path); i >= 0 {
d.Dmfs = append(d.Dmfs[:i], d.Dmfs[i+1:]...)
} else {
logger.Logger.Error("Music File not in Database !!!")
}
}
func (d *Database) AddMusicFile(file DatabaseMusicFile) {
d.Dmfs = append(d.Dmfs, file)
}
func (d *Database) IndexOfMusicFile(path string) int {
for index, dmf := range d.Dmfs {
p, _ := dmf.getFilePath()
if p == path {
return index
}
}
return -1
}