mnemo_cards/mnemo_cards_backend/lib/packs/pack_manager_extensions.dart

// Extensions and utilities for PackManager

import 'dart:typed_data';
import 'dart:io';
import 'dart:convert';
import 'package:image/image.dart';
import 'pack_manager.dart';

enum _ImageSize {
  big,
  medium,
  small,
  extraSmall,
}

extension on _ImageSize {
  int get width => switch (this) {
        _ImageSize.big => 1024,
        _ImageSize.medium => 512,
        _ImageSize.small => 320,
        _ImageSize.extraSmall => 192,
      };
}

extension CoverStringExt on String? {
  Future<String> get base64Image => _base64Image();

  Future<String> _base64Image([_ImageSize? size]) async {
    if (this == null) return '';
    try {
      final bytes = _getById(this!, 'covers', size);
      return base64Encode(bytes);
    } catch (e) {
      return '';
    }
  }

  Uint8List _getById(String id, String type, _ImageSize? size) {
    try {
      return File('${PackManagerUtils.assetsDirectory.path}/$type/$id')
          .readAsBytesSync();
    } catch (e) {
      print('Error loading image $id of type $type: $e');
      return Uint8List(0);
    }
  }

  Future<String> get smallBase64Image => _base64Image(_ImageSize.small);

  Future<String> get extraSmallBase64Image =>
      _base64Image(_ImageSize.extraSmall);

  Future<String> get mediumBase64Image => _base64Image(_ImageSize.medium);

  Future<String> get bigBase64Image => _base64Image(null);
}