Renamed persistence packages

persistence/db_ledis/nowplaying_repository.go

@@ -0,0 +1,97 @@
+package db_ledis
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/cloudsonic/sonic-server/domain"
+)
+
+var (
+	nowPlayingKeyPrefix = []byte("nowplaying")
+)
+
+type nowPlayingRepository struct {
+	ledisRepository
+}
+
+func NewNowPlayingRepository() domain.NowPlayingRepository {
+	r := &nowPlayingRepository{}
+	r.init("nowplaying", &domain.NowPlayingInfo{})
+	return r
+}
+
+func nowPlayingKeyName(playerId int) string {
+	return fmt.Sprintf("%s:%d", nowPlayingKeyPrefix, playerId)
+}
+
+func (r *nowPlayingRepository) Enqueue(info *domain.NowPlayingInfo) error {
+	h, err := json.Marshal(info)
+	if err != nil {
+		return err
+	}
+
+	keyName := []byte(nowPlayingKeyName(info.PlayerId))
+
+	_, err = Db().LPush(keyName, []byte(h))
+	Db().LExpire(keyName, int64(domain.NowPlayingExpire.Seconds()))
+	return err
+}
+
+func (r *nowPlayingRepository) Dequeue(playerId int) (*domain.NowPlayingInfo, error) {
+	keyName := []byte(nowPlayingKeyName(playerId))
+
+	val, err := Db().RPop(keyName)
+	if err != nil {
+		return nil, err
+	}
+	if val == nil {
+		return nil, nil
+	}
+	return r.parseInfo(val)
+}
+
+func (r *nowPlayingRepository) Head(playerId int) (*domain.NowPlayingInfo, error) {
+	keyName := []byte(nowPlayingKeyName(playerId))
+
+	val, err := Db().LIndex(keyName, 0)
+	if err != nil {
+		return nil, err
+	}
+	return r.parseInfo(val)
+}
+
+func (r *nowPlayingRepository) Tail(playerId int) (*domain.NowPlayingInfo, error) {
+	keyName := []byte(nowPlayingKeyName(playerId))
+
+	val, err := Db().LIndex(keyName, -1)
+	if err != nil {
+		return nil, err
+	}
+	return r.parseInfo(val)
+}
+
+func (r *nowPlayingRepository) Count(playerId int) (int64, error) {
+	keyName := []byte(nowPlayingKeyName(playerId))
+	return Db().LLen(keyName)
+}
+
+// TODO Will not work for multiple players
+func (r *nowPlayingRepository) GetAll() ([]*domain.NowPlayingInfo, error) {
+	np, err := r.Head(1)
+	if np == nil || err != nil {
+		return nil, err
+	}
+	return []*domain.NowPlayingInfo{np}, err
+}
+
+func (r *nowPlayingRepository) parseInfo(val []byte) (*domain.NowPlayingInfo, error) {
+	info := &domain.NowPlayingInfo{}
+	err := json.Unmarshal(val, info)
+	if err != nil {
+		return nil, nil
+	}
+	return info, nil
+}
+
+var _ domain.NowPlayingRepository = (*nowPlayingRepository)(nil)