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queuestorage.go
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queuestorage.go
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package player
import (
"bufio"
"fmt"
"github.com/Sirupsen/logrus"
"github.com/svenwiltink/go-musicbot/songplayer"
"os"
"strings"
"sync"
)
type QueueStorage struct {
path string
mutex sync.Mutex
}
func NewQueueStorage(path string) (qs *QueueStorage) {
return &QueueStorage{
path: path,
}
}
func (qs *QueueStorage) OnQueueUpdate(args ...interface{}) {
if len(args) < 1 {
return
}
queue, ok := args[0].([]songplayer.Playable)
if !ok {
return
}
var urls []string
for _, song := range queue {
urls = append(urls, song.GetURL())
}
err := qs.saveQueue(urls)
if err != nil {
logrus.Errorf("QueueStorage.OnQueueUpdate: Error saving queue: %v", err)
return
}
}
func (qs *QueueStorage) saveQueue(urls []string) (err error) {
qs.mutex.Lock()
defer qs.mutex.Unlock()
file, err := os.Create(qs.path)
if err != nil {
logrus.Warnf("QueueStorage.saveQueue: Error opening file [%s] %v", qs.path, err)
return
}
defer file.Close()
w := bufio.NewWriter(file)
for _, url := range urls {
_, err = fmt.Fprintln(w, url)
if err != nil {
return
}
}
err = w.Flush()
return
}
func (qs *QueueStorage) ReadQueue() (urls []string, err error) {
qs.mutex.Lock()
defer qs.mutex.Unlock()
file, err := os.Open(qs.path)
if err != nil {
logrus.Warnf("QueueStorage.ReadQueue: Error reading file [%s] %v", qs.path, err)
return
}
defer file.Close()
scanner := bufio.NewScanner(file)
for scanner.Scan() {
urls = append(urls, strings.TrimSpace(scanner.Text()))
}
err = scanner.Err()
if err != nil {
logrus.Warnf("QueueStorage.ReadQueue: Error scanning file: %v", err)
return
}
return
}