feat: add yggdrasil metadata endpoint and support authlib-injector

internal/api/auth_handler.go

@@ -12,7 +12,9 @@ import (
 )
 
 type AuthHandler struct {
-	Service *core.AuthService
+	Service        *core.AuthService
+	ProfileService *core.ProfileService
+	Domain         string
 }
 
 // YggdrasilError - стандартный формат ошибки для authserver
@@ -126,3 +128,27 @@ func (h *AuthHandler) Login(w http.ResponseWriter, r *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	json.NewEncoder(w).Encode(response)
 }
+
+func (h *AuthHandler) GetMetadata(w http.ResponseWriter, r *http.Request) {
+	pubKey, err := h.ProfileService.GetPublicKey()
+	if err != nil {
+		slog.Error("Failed to get public key", "error", err)
+		http.Error(w, "Internal server error", http.StatusInternalServerError)
+		return
+	}
+
+	metadata := models.YggdrasilMetadata{
+		Meta: models.MetaLinks{
+			Homepage: "https://" + h.Domain,
+			Register: "https://" + h.Domain + "/register",
+		},
+		SkinDomains: models.MetaSkinDomains{
+			Deny: []string{},
+		},
+		Signature: pubKey,
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(http.StatusOK)
+	json.NewEncoder(w).Encode(metadata)
+}