1 files changed, 69 insertions, 0 deletions
diff --git a/src/cli/fileTree.ts b/src/cli/fileTree.ts
new file mode 100644
index 0000000..736b1e1
--- /dev/null
+++ b/src/cli/fileTree.ts
@@ -0,0 +1,69 @@
+// Walk Overleaf project root folder into flat maps (same logic as main/index.ts walkRootFolder)
+
+export interface FileTreeEntry {
+  name: string
+  path: string       // relative path, forward slashes
+  isDir: boolean
+  docId?: string      // text docs
+  fileRefId?: string  // binary files
+}
+
+export interface FileTreeResult {
+  entries: FileTreeEntry[]
+  docPathMap: Record<string, string>   // docId → relPath
+  pathDocMap: Record<string, string>   // relPath → docId
+  fileRefs: Array<{ id: string; path: string }>
+  folderMap: Record<string, string>    // folderId → relPath ('' for root)
+  pathFolderMap: Record<string, string> // relPath → folderId
+  rootFolderId: string
+}
+
+interface FolderLike {
+  _id: string
+  name: string
+  docs?: Array<{ _id: string; name: string }>
+  fileRefs?: Array<{ _id: string; name: string }>
+  folders?: FolderLike[]
+}
+
+export function walkRootFolder(rootFolder: FolderLike[]): FileTreeResult {
+  const docPathMap: Record<string, string> = {}
+  const pathDocMap: Record<string, string> = {}
+  const fileRefs: Array<{ id: string; path: string }> = []
+  const folderMap: Record<string, string> = {}
+  const pathFolderMap: Record<string, string> = {}
+  const entries: FileTreeEntry[] = []
+  const rootFolderId = rootFolder[0]?._id || ''
+
+  function walk(f: FolderLike, prefix: string): void {
+    // Register this folder
+    const folderPath = prefix ? prefix.slice(0, -1) : '' // remove trailing /
+    folderMap[f._id] = folderPath
+    pathFolderMap[folderPath] = f._id
+
+    for (const doc of f.docs || []) {
+      const relPath = prefix + doc.name
+      docPathMap[doc._id] = relPath
+      pathDocMap[relPath] = doc._id
+      entries.push({ name: doc.name, path: relPath, isDir: false, docId: doc._id })
+    }
+
+    for (const ref of f.fileRefs || []) {
+      const relPath = prefix + ref.name
+      fileRefs.push({ id: ref._id, path: relPath })
+      entries.push({ name: ref.name, path: relPath, isDir: false, fileRefId: ref._id })
+    }
+
+    for (const sub of f.folders || []) {
+      const subPrefix = prefix + sub.name + '/'
+      entries.push({ name: sub.name, path: subPrefix.slice(0, -1), isDir: true })
+      walk(sub, subPrefix)
+    }
+  }
+
+  if (rootFolder[0]) {
+    walk(rootFolder[0], '')
+  }
+
+  return { entries, docPathMap, pathDocMap, fileRefs, folderMap, pathFolderMap, rootFolderId }
+}