From 31bb673b44687547259a48595cacac7edf714f94 Mon Sep 17 00:00:00 2001
From: CODEX <codex@nodedc.local>
Date: Wed, 24 Jun 2026 18:43:06 +0300
Subject: [PATCH] Fix BIM model version switching

---
 frontend/dcViewer.js | 54 ++++++++++++++++++++++++++++----------------
 frontend/index.html  |  2 +-
 2 files changed, 35 insertions(+), 21 deletions(-)

diff --git a/frontend/dcViewer.js b/frontend/dcViewer.js
index ee9f525..c417787 100644
--- a/frontend/dcViewer.js
+++ b/frontend/dcViewer.js
@@ -318,6 +318,7 @@ let modelVersionHistory = null;
 let modelVersionHistoryLoading = false;
 let modelVersionUploading = false;
 let versionHistoryModal = null;
+let loadModelAsyncRef = null;
 let emptyWheelNavigationRestoreTimer = null;
 let lastSurfaceDollyFactor = null;
 let lastSurfaceDollyFactorAt = 0;
@@ -4864,6 +4865,10 @@ const refreshModelVersionHistory = async ({ silent = false } = {}) => {
 };
 
 const openModelVersion = async (version) => {
+  if (!loadModelAsyncRef) {
+    showError("Загрузчик модели еще не готов");
+    return;
+  }
   const viewerSrc = getVersionViewerSrc(version);
   const viewerType = getVersionViewerType(version);
   if (!viewerSrc || !viewerType) {
@@ -4886,25 +4891,33 @@ const openModelVersion = async (version) => {
     artifactSrc: normalizeModelSettingsSrc(viewerSrc) || viewerSrc,
     viewerSettings: null,
   };
-  const settings = await fetchModelSettings(settingsSrc).catch(() => null);
-  if (settings?.viewerSettings) {
-    meta.viewerSettings = settings.viewerSettings;
+  try {
+    const settings = await fetchModelSettings(settingsSrc).catch(() => null);
+    if (settings?.viewerSettings) {
+      meta.viewerSettings = settings.viewerSettings;
+    }
+    await loadModelAsyncRef({
+      type: viewerType,
+      url: viewerSrc,
+      name: version.originalFilename || previousEntry?.name || "model",
+      replace: true,
+      preserveMeta: true,
+      id: previousEntry?.model?.id || "model",
+      meta,
+    });
+    modelVersionHistory = {
+      ...(modelVersionHistory || {}),
+      currentVersion: version.version || modelVersionHistory?.currentVersion || null,
+      currentVersionId: version.versionId || modelVersionHistory?.currentVersionId || null,
+      versions: modelVersionHistory?.versions || meta.versions || [],
+    };
+    updateModelVersionControl();
+    setStatus(`Открыта версия v${version.version || ""}`.trim());
+  } catch (err) {
+    console.error(err);
+    showError(err.message || "Не удалось открыть версию модели");
+    updateModelVersionControl();
   }
-  await loadModelAsync({
-    type: viewerType,
-    url: viewerSrc,
-    name: version.originalFilename || previousEntry?.name || "model",
-    replace: true,
-    id: previousEntry?.model?.id || "model",
-    meta,
-  });
-  modelVersionHistory = {
-    ...(modelVersionHistory || {}),
-    currentVersion: version.version || modelVersionHistory?.currentVersion || null,
-    currentVersionId: version.versionId || modelVersionHistory?.currentVersionId || null,
-    versions: modelVersionHistory?.versions || meta.versions || [],
-  };
-  updateModelVersionControl();
 };
 
 const uploadModelVersion = async (file) => {
@@ -6051,7 +6064,7 @@ const initViewer = async () => {
   const loadModel = (options) => {
     const debugOptions = options || {};
     try {
-      const { type, url, name = "", replace = true, id: forcedId, meta, edges } = options;
+      const { type, url, name = "", replace = true, id: forcedId, meta, edges, preserveMeta = false } = options;
       const modelSettings = meta?.viewerSettings;
       const normalizedType = normalizeType(type, typeof url === "string" ? url : "");
       const inferredType = normalizedType || normalizeType(guessTypeFromName(typeof url === "string" ? url : ""));
@@ -6062,7 +6075,7 @@ const initViewer = async () => {
       }
 
       if (replace) {
-        destroyAllModels({ preserveMeta: isLoadingSavedProject });
+        destroyAllModels({ preserveMeta: preserveMeta || isLoadingSavedProject });
       }
 
       if (modelSettings) {
@@ -6215,6 +6228,7 @@ const initViewer = async () => {
     model.on("loaded", () => resolve(model));
     model.on("error", (err) => reject(new Error(err?.message || err)));
   });
+  loadModelAsyncRef = loadModelAsync;
 
   const loadStartupModelFromQuery = async () => {
     const params = new URLSearchParams(window.location.search);
diff --git a/frontend/index.html b/frontend/index.html
index 838cd6b..f802211 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -697,6 +697,6 @@
   <input id="fileInput" class="hidden" type="file"
          accept=".xkt,.glb,.gltf,.bim,.las,.laz,.obj,.stl">
 
-  <script type="module" src="/dcViewer.js?v=57"></script>
+  <script type="module" src="/dcViewer.js?v=58"></script>
 </body>
 </html>