fix(server): only build core.Agents once

Signed-off-by: Deluan <deluan@navidrome.org>

core/agents/agents.go

@@ -10,6 +10,7 @@ import (
 	"github.com/navidrome/navidrome/log"
 	"github.com/navidrome/navidrome/model"
 	"github.com/navidrome/navidrome/utils"
+	"github.com/navidrome/navidrome/utils/singleton"
 )
 
 type Agents struct {
@@ -17,7 +18,13 @@ type Agents struct {
 	agents []Interface
 }
 
-func New(ds model.DataStore) *Agents {
+func GetAgents(ds model.DataStore) *Agents {
+	return singleton.GetInstance(func() *Agents {
+		return createAgents(ds)
+	})
+}
+
+func createAgents(ds model.DataStore) *Agents {
 	var order []string
 	if conf.Server.Agents != "" {
 		order = strings.Split(conf.Server.Agents, ",")

core/agents/agents_test.go

@@ -29,7 +29,7 @@ var _ = Describe("Agents", func() {
 		var ag *Agents
 		BeforeEach(func() {
 			conf.Server.Agents = ""
-			ag = New(ds)
+			ag = createAgents(ds)
 		})
 
 		It("calls the placeholder GetArtistImages", func() {
@@ -49,7 +49,7 @@ var _ = Describe("Agents", func() {
 			Register("disabled", func(model.DataStore) Interface { return nil })
 			Register("empty", func(model.DataStore) Interface { return &emptyAgent{} })
 			conf.Server.Agents = "empty,fake,disabled"
-			ag = New(ds)
+			ag = createAgents(ds)
 			Expect(ag.AgentName()).To(Equal("agents"))
 		})