moviesFromTurtle static method

Implementation

static List<Movie> moviesFromTurtle(String ttlContent) {
  try {
    // First try to parse from JSON backup for backward compatibility.

    final jsonMatch = RegExp(r'# JSON_DATA: (.+)').firstMatch(ttlContent);
    if (jsonMatch != null) {
      final jsonData = jsonMatch.group(1)!;
      final decoded = jsonDecode(jsonData) as List<dynamic>;
      return decoded.map((movie) => Movie.fromJson(movie)).toList();
    }

    // Parse using proper RDF if no JSON backup.

    final triples = turtleToTripleMap(ttlContent);
    final movies = <Movie>[];

    // Find movie resources (subjects that have movie:Movie type).

    for (final subject in triples.keys) {
      final predicates = triples[subject]!;

      // Check if this is a movie resource - look for various type URIs.

      final typeValues =
          predicates['http://www.w3.org/1999/02/22-rdf-syntax-ns#type'] ?? [];

      final isMovie = typeValues.any(
        (type) =>
            type.toString().contains('Movie') ||
            type == 'http://schema.org/Movie' ||
            type == '#Movie',
      );

      if (isMovie) {
        // Extract movie data from predicates.

        final movie = _extractMovieFromTriples(predicates);
        if (movie != null) {
          movies.add(movie);
        }
      }
    }

    return movies;
  } catch (e) {
    // Fallback to empty list if parsing fails.

    return [];
  }
}