Opt: oauth2EnabledCache

server/oauth2/oauth2.go

@@ -1,13 +1,31 @@
 package auth
 
 import (
+	"sync"
+
 	"github.com/gin-gonic/gin"
+	"github.com/synctv-org/synctv/internal/provider"
 	"github.com/synctv-org/synctv/internal/provider/providers"
+	"github.com/zijiren233/gencontainer/vec"
 	"golang.org/x/exp/maps"
 )
 
+var (
+	oauth2EnabledCache []provider.OAuth2Provider
+	oauth2EnabledOnce  sync.Once
+)
+
 func OAuth2EnabledApi(ctx *gin.Context) {
+	oauth2EnabledOnce.Do(func() {
+		oauth2EnabledCache = maps.Keys(providers.EnabledProvider())
+		a := vec.New[provider.OAuth2Provider](vec.WithCmpEqual[provider.OAuth2Provider](func(v1, v2 provider.OAuth2Provider) bool {
+			return v1 == v2
+		}), vec.WithCmpLess[provider.OAuth2Provider](func(v1, v2 provider.OAuth2Provider) bool {
+			return v1 < v2
+		}))
+		a.Push(oauth2EnabledCache...).SortStable().Slice()
+	})
 	ctx.JSON(200, gin.H{
-		"enabled": maps.Keys(providers.EnabledProvider()),
+		"enabled": oauth2EnabledCache,
 	})
 }