Add BIM legacy share transform fallback

server/index.js

@@ -1946,6 +1946,79 @@ const normalizeViewerSettings = (value) => (
         : null
 );
 
+const viewerSettingsHaveTransforms = (settings) => {
+    const transforms = settings?.viewerState?.transforms;
+    return !!(
+        transforms &&
+        typeof transforms === "object" &&
+        !Array.isArray(transforms) &&
+        Object.keys(transforms).length
+    );
+};
+
+const modelRecordMatchesShare = (model, share) => {
+    const meta = model?.meta && typeof model.meta === "object" ? model.meta : {};
+    if (share?.assetId && meta.assetId === share.assetId) {
+        if (share.projectId && meta.projectId && meta.projectId !== share.projectId) {
+            return false;
+        }
+        if (share.versionId && meta.versionId && meta.versionId !== share.versionId) {
+            return false;
+        }
+        return true;
+    }
+
+    const haystack = [
+        model?.src,
+        meta.sourceSrc,
+        meta.settingsSrc,
+        meta.artifactSrc
+    ].filter(Boolean).join("\n");
+    if (!haystack || !share?.assetId || !haystack.includes(share.assetId)) {
+        return false;
+    }
+    return !share.versionId || haystack.includes(share.versionId);
+};
+
+const readProjectViewerSettingsForShare = async (share) => {
+    if (!share?.assetId) return null;
+    let entries = [];
+    try {
+        entries = await fs.readdir(DATA_DIR, {withFileTypes: true});
+    } catch (_err) {
+        return null;
+    }
+
+    let best = null;
+    for (const entry of entries) {
+        if (!entry.isFile() || !entry.name.endsWith(".json") || entry.name === "index.json") {
+            continue;
+        }
+        const projectPath = path.join(DATA_DIR, entry.name);
+        const project = await readJSONFile(projectPath).catch(() => null);
+        if (!project || !Array.isArray(project.models)) {
+            continue;
+        }
+        if (!project.models.some((model) => modelRecordMatchesShare(model, share))) {
+            continue;
+        }
+        const settings = normalizeViewerSettings({
+            version: 1,
+            updatedAt: project.updatedAt || project.createdAt || nowIso(),
+            viewerState: project.viewerState || {},
+            design: project.design || null
+        });
+        if (!viewerSettingsHaveTransforms(settings)) {
+            continue;
+        }
+        const updatedAtMs = Date.parse(settings.updatedAt || "") || 0;
+        if (!best || updatedAtMs >= best.updatedAtMs) {
+            best = {settings, updatedAtMs};
+        }
+    }
+    return best?.settings || null;
+};
+
 const readViewerSettingsForModelSrc = async (src) => {
     const manifestRef = await findManifestForModelSrc(src).catch(() => null);
     if (!manifestRef || !existsSync(manifestRef.manifestPath)) {
@@ -1955,6 +2028,33 @@ const readViewerSettingsForModelSrc = async (src) => {
     return normalizeViewerSettings(manifest?.viewerSettings);
 };
 
+const mergeViewerSettingsTransforms = (base, fallback) => {
+    const normalizedBase = normalizeViewerSettings(base);
+    const normalizedFallback = normalizeViewerSettings(fallback);
+    if (!normalizedBase || viewerSettingsHaveTransforms(normalizedBase) || !viewerSettingsHaveTransforms(normalizedFallback)) {
+        return normalizedBase || normalizedFallback || null;
+    }
+    return {
+        ...normalizedBase,
+        viewerState: {
+            ...(normalizedBase.viewerState || {}),
+            transforms: normalizedFallback.viewerState.transforms,
+            models: normalizedFallback.viewerState.models || normalizedBase.viewerState?.models || []
+        }
+    };
+};
+
+const resolveShareViewerSettings = async (share) => {
+    const shareSettings = normalizeViewerSettings(share?.viewerSettings);
+    const manifestSettings = await readViewerSettingsForModelSrc(share?.settingsSrc || share?.src);
+    const base = shareSettings || manifestSettings;
+    if (viewerSettingsHaveTransforms(base)) {
+        return base;
+    }
+    const projectSettings = await readProjectViewerSettingsForShare(share);
+    return mergeViewerSettingsTransforms(base, projectSettings);
+};
+
 const handleCreateShare = async (req, res) => {
     const session = await getValidatedBimSession(req, res);
     if (BIM_AUTH_REQUIRED && !session) {
@@ -1988,8 +2088,14 @@ const handleCreateShare = async (req, res) => {
     const name = typeof payload?.name === "string" && payload.name.trim()
         ? payload.name.trim().slice(0, 240)
         : path.basename(src);
-    const viewerSettings = normalizeViewerSettings(payload?.viewerSettings)
-        || await readViewerSettingsForModelSrc(settingsSrc || src);
+    const viewerSettings = await resolveShareViewerSettings({
+        ...identity,
+        src,
+        settingsSrc,
+        versionId: typeof payload?.versionId === "string" ? payload.versionId : null,
+        selectedLod: stringOrNull(payload?.selectedLod),
+        viewerSettings: normalizeViewerSettings(payload?.viewerSettings)
+    });
     const share = {
         token,
         access: "public-readonly",
@@ -2072,8 +2178,7 @@ const handleGetShare = async (req, res, token) => {
         projectId: share.projectId,
         assetId: share.assetId
     }).catch(() => null);
-    const viewerSettings = normalizeViewerSettings(share.viewerSettings)
-        || await readViewerSettingsForModelSrc(share.settingsSrc || share.src);
+    const viewerSettings = await resolveShareViewerSettings(share);
     sendJSON(res, 200, {
         ok: true,
         mode: authenticated ? "standard" : "guest",