Example extensions on the Rive File asset type in Flutter.

rive_asset.dart

import 'package:rive/src/rive_core/assets/file_asset.dart';

export 'package:rive/src/generated/artboard_base.dart';

extension FileAssetExtension on FileAsset {
  Extension get extension => _getExtension(fileExtension);
  Type get type => _getType(extension);
}

Extension _getExtension(String ext) {
  switch (ext) {
    case 'png':
      return Extension.png;
    case 'jpeg':
      return Extension.jpeg;
    case 'webp':
      return Extension.webp;
    case 'otf':
      return Extension.otf;
    case 'ttf':
      return Extension.ttf;
    case 'flac':
      return Extension.flac;
    case 'mp3':
      return Extension.mp3;
    case 'wav':
      return Extension.wav;
  }
  return Extension.unknown;
}

Type _getType(Extension ext) {
  switch (ext) {
    case Extension.png:
    case Extension.jpeg:
    case Extension.webp:
      return Type.image;
    case Extension.otf:
    case Extension.ttf:
      return Type.font;
    case Extension.flac:
    case Extension.mp3:
    case Extension.wav:
      return Type.audio;
    case Extension.unknown:
      return Type.unknown;
  }
}

enum Extension {
  otf,
  ttf,
  jpeg,
  png,
  webp,
  flac,
  mp3,
  wav,
  unknown,
}

enum Type {
  font,
  image,
  audio,
  unknown,
}