Implements NowPlayingRepository as an in-memory only struct

persistence/db_ledis/wire_providers.go

@@ -1,9 +1,18 @@
 package db_ledis
 
 import (
+	"github.com/cloudsonic/sonic-server/persistence"
 	"github.com/google/wire"
 )
 
 var Set = wire.NewSet(
+	NewPropertyRepository,
+	NewArtistRepository,
+	NewAlbumRepository,
+	NewMediaFileRepository,
+	NewArtistIndexRepository,
+	NewPlaylistRepository,
+	NewCheckSumRepository,
 	NewNowPlayingRepository,
+	persistence.NewMediaFolderRepository,
 )

persistence/db_storm/wire_providers.go

@@ -13,5 +13,6 @@ var Set = wire.NewSet(
 	NewArtistIndexRepository,
 	NewPlaylistRepository,
 	NewCheckSumRepository,
+	persistence.NewNowPlayingRepository,
 	persistence.NewMediaFolderRepository,
 )

persistence/nowplaying_repository.go

@@ -0,0 +1,75 @@
+package persistence
+
+import (
+	"container/list"
+	"sync"
+
+	"github.com/cloudsonic/sonic-server/domain"
+)
+
+var playerMap = sync.Map{}
+
+type nowPlayingRepository struct{}
+
+// TODO Make it persistent
+func NewNowPlayingRepository() domain.NowPlayingRepository {
+	r := &nowPlayingRepository{}
+	return r
+}
+
+func (r *nowPlayingRepository) getList(id int) *list.List {
+	l, _ := playerMap.LoadOrStore(id, list.New())
+	return l.(*list.List)
+}
+
+func (r *nowPlayingRepository) Enqueue(info *domain.NowPlayingInfo) error {
+	l := r.getList(info.PlayerId)
+	l.PushFront(info)
+	return nil
+}
+
+func (r *nowPlayingRepository) Dequeue(playerId int) (*domain.NowPlayingInfo, error) {
+	l := r.getList(playerId)
+	e := l.Back()
+	if e == nil {
+		return nil, nil
+	}
+	l.Remove(e)
+	return e.Value.(*domain.NowPlayingInfo), nil
+}
+
+func (r *nowPlayingRepository) Head(playerId int) (*domain.NowPlayingInfo, error) {
+	l := r.getList(playerId)
+	e := l.Front()
+	if e == nil {
+		return nil, nil
+	}
+	return e.Value.(*domain.NowPlayingInfo), nil
+}
+
+func (r *nowPlayingRepository) Tail(playerId int) (*domain.NowPlayingInfo, error) {
+	l := r.getList(playerId)
+	e := l.Back()
+	if e == nil {
+		return nil, nil
+	}
+	return e.Value.(*domain.NowPlayingInfo), nil
+}
+
+func (r *nowPlayingRepository) Count(playerId int) (int64, error) {
+	l := r.getList(playerId)
+	return int64(l.Len()), nil
+}
+
+func (r *nowPlayingRepository) GetAll() ([]*domain.NowPlayingInfo, error) {
+	var all []*domain.NowPlayingInfo
+	playerMap.Range(func(playerId, l interface{}) bool {
+		ll := l.(*list.List)
+		e := ll.Front()
+		all = append(all, e.Value.(*domain.NowPlayingInfo))
+		return true
+	})
+	return all, nil
+}
+
+var _ domain.NowPlayingRepository = (*nowPlayingRepository)(nil)

persistence/nowplaying_repository_test.go

@@ -0,0 +1,50 @@
+package persistence
+
+import (
+	"sync"
+
+	"github.com/cloudsonic/sonic-server/domain"
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+var _ = Describe("NowPlayingRepository", func() {
+	var repo domain.NowPlayingRepository
+
+	BeforeEach(func() {
+		playerMap = sync.Map{}
+		repo = NewNowPlayingRepository()
+	})
+
+	It("enqueues and dequeues records", func() {
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "AAA"})).To(BeNil())
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "BBB"})).To(BeNil())
+
+		Expect(repo.Tail(1)).To(Equal(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "AAA"}))
+		Expect(repo.Head(1)).To(Equal(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "BBB"}))
+
+		Expect(repo.Count(1)).To(Equal(int64(2)))
+
+		Expect(repo.Dequeue(1)).To(Equal(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "AAA"}))
+		Expect(repo.Count(1)).To(Equal(int64(1)))
+	})
+
+	It("handles multiple players", func() {
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "AAA"})).To(BeNil())
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "BBB"})).To(BeNil())
+
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 2, TrackID: "CCC"})).To(BeNil())
+		Expect(repo.Enqueue(&domain.NowPlayingInfo{PlayerId: 2, TrackID: "DDD"})).To(BeNil())
+
+		Expect(repo.GetAll()).To(Equal([]*domain.NowPlayingInfo{
+			{PlayerId: 1, TrackID: "BBB"},
+			{PlayerId: 2, TrackID: "DDD"},
+		}))
+
+		Expect(repo.Count(2)).To(Equal(int64(2)))
+		Expect(repo.Count(2)).To(Equal(int64(2)))
+
+		Expect(repo.Tail(1)).To(Equal(&domain.NowPlayingInfo{PlayerId: 1, TrackID: "AAA"}))
+		Expect(repo.Head(2)).To(Equal(&domain.NowPlayingInfo{PlayerId: 2, TrackID: "DDD"}))
+	})
+})

persistence/persistence_suite_test.go

@@ -0,0 +1,14 @@
+package persistence
+
+import (
+	"testing"
+
+	. "github.com/onsi/ginkgo"
+	. "github.com/onsi/gomega"
+)
+
+func TestPersistence(t *testing.T) {
+	//log.SetLevel(log.LevelCritical)
+	RegisterFailHandler(Fail)
+	RunSpecs(t, "Common Persistence Suite")
+}