feat: add /api/user/me endpoint for session restoration

internal/api/user_handler.go

@@ -9,6 +9,7 @@ import (
 	"gitea.mrixs.me/minecraft-platform/backend/internal/core"
 	"gitea.mrixs.me/minecraft-platform/backend/internal/database"
 	"gitea.mrixs.me/minecraft-platform/backend/internal/models"
+	"github.com/golang-jwt/jwt/v5"
 )
 
 type UserHandler struct {
@@ -45,3 +46,33 @@ func (h *UserHandler) Register(w http.ResponseWriter, r *http.Request) {
 	log.Printf("[Handler] User '%s' registered successfully.", req.Username)
 	w.WriteHeader(http.StatusCreated)
 }
+
+// GetMe возвращает информацию о текущем аутентифицированном пользователе
+func (h *UserHandler) GetMe(w http.ResponseWriter, r *http.Request) {
+	claims, ok := r.Context().Value(ClaimsContextKey).(jwt.MapClaims)
+	if !ok {
+		http.Error(w, "Could not get claims from context", http.StatusInternalServerError)
+		return
+	}
+
+	// В AuthMiddleware мы не проверяли тип user_id, там json.Number или float64
+	// Обычно jwt-go возвращает float64
+	var userID int
+	if idFloat, ok := claims["user_id"].(float64); ok {
+		userID = int(idFloat)
+	} else {
+		log.Printf("[Handler] Invalid user_id type in claims: %T", claims["user_id"])
+		http.Error(w, "Invalid token claims", http.StatusUnauthorized)
+		return
+	}
+
+	user, err := h.Service.GetUserByID(r.Context(), userID)
+	if err != nil {
+		log.Printf("[Handler] Failed to get user by ID: %v", err)
+		http.Error(w, "User not found", http.StatusNotFound)
+		return
+	}
+
+	w.Header().Set("Content-Type", "application/json")
+	json.NewEncoder(w).Encode(user)
+}