Function scanEntry

src/utils/fileScanning.ts:24–58

(
  entry: FileSystemEntry,
  path: string,
  files: Map<string, File>
)

 * Recursively scan drag/drop FileSystemEntry trees from webkitGetAsEntry().
 */
export async function scanEntry(
  entry: FileSystemEntry,
  path: string,
  files: Map<string, File>
): Promise<void> {
  const fullPath = path ? `${path}/${entry.name}` : entry.name;

  try {
    if (isFileSystemFileEntry(entry)) {
      const file = await new Promise<File>((resolve, reject) => {
        entry.file(resolve, reject);
      });
      files.set(fullPath, file);
    } else if (isFileSystemDirectoryEntry(entry)) {
      const dirReader = entry.createReader();

      let allEntries: FileSystemEntry[] = [];
      let entries: FileSystemEntry[];

      do {
        entries = await new Promise<FileSystemEntry[]>((resolve, reject) => {
          dirReader.readEntries(resolve, reject);
        });
        allEntries = allEntries.concat(entries);
      } while (entries.length > 0);

      for (let i = 0; i < allEntries.length; i += DIRECTORY_ENTRY_BATCH_SIZE) {
        const batch = allEntries.slice(i, i + DIRECTORY_ENTRY_BATCH_SIZE);
        await Promise.all(batch.map((childEntry) => scanEntry(childEntry, fullPath, files)));
      }
    }
  } catch (err) {
    appLogger.warn(`Failed to scan entry: ${fullPath}`, err);
  }
}

/**
 * Recursively scan File System Access API directory handles from showDirectoryPicker().