getMovieComments method

Implementation

Future<String?> getMovieComments(Movie movie) async {
  // First check cache.

  if (_cachedComments != null &&
      _cachedComments!.containsKey(movie.id.toString())) {
    final cached = _cachedComments![movie.id.toString()];
    return cached?.isNotEmpty == true ? cached : null;
  }

  // Try to read file - on first read after app restart, _moviesWithFiles will be empty.
  // But we should still try to read existing files.

  final movieData = await _readMovieFile(movie);
  if (movieData != null && movieData['comment'] != null) {
    final comment = movieData['comment'] as String?;
    if (comment != null && comment.isNotEmpty) {
      // Cache the result and mark as having a file.

      _cachedComments ??= {};
      _cachedComments![movie.id.toString()] = comment;
      _moviesWithFiles.add(movie.id);
      return comment;
    }
  }

  // No comment found - don't cache null values, just return null
  return null;
}