Fix authenticated BIM share promotion

frontend/dcViewer.css

@@ -3220,11 +3220,17 @@ header {
 }
 
 body[data-viewer-mode="guest"] .tb-btn:not([data-action="measure"]):not([data-action="section"]):not([data-action="projection"]),
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) .tb-btn:not([data-action="measure"]):not([data-action="section"]):not([data-action="projection"]),
 body[data-viewer-mode="guest"] #settingsPanel,
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) #settingsPanel,
 body[data-viewer-mode="guest"] #templatesPanel,
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) #templatesPanel,
 body[data-viewer-mode="guest"] #projectNameSection,
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) #projectNameSection,
 body[data-viewer-mode="guest"] #saveProjectSection,
-body[data-viewer-mode="guest"] #modelVersionUploadButton {
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) #saveProjectSection,
+body[data-viewer-mode="guest"] #modelVersionUploadButton,
+html[data-share-startup="guest"] body:not([data-viewer-mode="standard"]) #modelVersionUploadButton {
   display: none !important;
 }
 

frontend/dcViewer.js

@@ -184,6 +184,7 @@ const AUTH_SESSION_API = "/api/auth/session";
 const SHARES_API = "/api/shares";
 const COMMENTS_API = "/api/comments";
 const UPLOAD_VERSIONS_API = "/api/uploads/versions";
+const SHARE_AUTH_GUEST_PARAM = "ndc_bim_guest";
 const SHARE_PROMOTION_TIMEOUT_MS = 4500;
 
 const acceptByType = {
@@ -624,13 +625,39 @@ const getShareTokenFromPath = () => {
 const getCurrentReturnPath = () => `${window.location.pathname}${window.location.search || ""}${window.location.hash || ""}`;
 
 const getShareTopLevelPromotionUrl = () => {
-  const promoteUrl = startupSharePayload?.promoteUrl;
+  const promoteUrl = startupSharePayload?.optionalPromoteUrl || startupSharePayload?.promoteUrl;
   return typeof promoteUrl === "string" && promoteUrl.trim() ? promoteUrl : "";
 };
 
+const hasShareGuestAuthMarker = () => {
+  try {
+    return new URLSearchParams(window.location.search || "").get(SHARE_AUTH_GUEST_PARAM) === "1";
+  } catch (_) {
+    return false;
+  }
+};
+
+const clearShareGuestAuthMarker = () => {
+  if (!hasShareGuestAuthMarker()) return;
+  try {
+    const url = new URL(window.location.href);
+    url.searchParams.delete(SHARE_AUTH_GUEST_PARAM);
+    window.history.replaceState(window.history.state, "", `${url.pathname}${url.search}${url.hash}`);
+  } catch (_) {
+    // keep current URL if the History API is unavailable
+  }
+};
+
 const scheduleShareSessionPromotion = (shareToken) => {
   const silentPromoteUrl = startupSharePayload?.silentPromoteUrl;
-  if (!shareToken || viewerMode !== "guest" || runtimeSessionInfo.authenticated || typeof silentPromoteUrl !== "string" || !silentPromoteUrl.trim()) {
+  if (
+    !shareToken ||
+    hasShareGuestAuthMarker() ||
+    viewerMode !== "guest" ||
+    runtimeSessionInfo.authenticated ||
+    typeof silentPromoteUrl !== "string" ||
+    !silentPromoteUrl.trim()
+  ) {
     return;
   }
   let storageKey = "";
@@ -1810,6 +1837,7 @@ const applyRuntimeMode = () => {
 
 const initializeRuntimeMode = async () => {
   const shareToken = getShareTokenFromPath();
+  const shareGuestAuthMarker = hasShareGuestAuthMarker();
   if (shareToken) {
     viewerMode = "guest";
     inspectorCollapsed = true;
@@ -1849,7 +1877,8 @@ const initializeRuntimeMode = async () => {
   }
 
   applyRuntimeMode();
-  if (shareToken && viewerMode === "guest") {
+  clearShareGuestAuthMarker();
+  if (shareToken && viewerMode === "guest" && !shareGuestAuthMarker) {
     scheduleShareSessionPromotion(shareToken);
   }
 };
@@ -5182,13 +5211,13 @@ const applyViewerState = (state) => {
 };
 
 const initViewer = async () => {
-  // remove preload hidden style ASAP
+  await initializeRuntimeMode();
+
   const preloadHidden = document.getElementById("preload-hidden");
   if (preloadHidden) {
     preloadHidden.remove();
   }
   document.body.style.opacity = "1";
-  await initializeRuntimeMode();
 
   const sdk = await import(SDK_URL);
   sdkRef = sdk;

frontend/index.html

@@ -13,6 +13,13 @@
   <link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
   <link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Manrope:wght@500;600;700&display=swap">
   <script src="/theme.js?v=3"></script>
+  <script>
+    (function () {
+      if (/^\/share\/[^/]+\/?$/.test(window.location.pathname || "")) {
+        document.documentElement.dataset.shareStartup = "guest";
+      }
+    }());
+  </script>
   <script>
     // Apply persisted theme ASAP to avoid initial flash of defaults
     (function () {