vkdart

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import 'package:vkdart/util.dart';
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import 'package:vkdart/vkontakte.dart';
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/// Listing of languages supported by VK API.
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enum LangApi {
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  /// Russian.
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  ru,
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  /// Ukrainian
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  uk,
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  /// Belarusian
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  be,
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  /// English
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  en,
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  /// Finnish
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  fi,
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  /// German
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  de,
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  /// Italian
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  it
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}
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/// The class of interaction with the VK API.
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class Vkontakte {
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  static const _baseUrl = 'https://api.vk.com/method/';
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  final String _token;
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  final LangApi _language;
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  final String _version;
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  /// Creating a base instance of the [Api] class.
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  ///
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  /// [token] - access key.
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  /// [language] - defines the language in which various data will be returned,
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  /// such as the names of countries and cities.
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  /// [version] - API version used.
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  Vkontakte({
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    required String token,
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    required LangApi language,
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    required String version,
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  })  : _token = token,
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        _language = language,
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        _version = version;
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  /// Allows you to create requests to the VK Api.
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  Future<Object> request(String methodName,
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      [Map<String, dynamic> body = const {}]) async {
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    final requestBody = {
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      ...body,
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      'v': _version,
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      'lang': _language.index,
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    };
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    final headers = {'Authorization': 'Bearer $_token'};
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    return HttpClient.httpPost(
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      _baseUrl + methodName,
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      body: requestBody,
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      headers: headers,
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    ).then((data) {
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      final error = (data['error'] as Map?)?.cast<String, dynamic>();
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      final response = data['response'] as Object?;
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      if (error != null) return Future.error(ApiException(error));
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      return response!;
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    });
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  }
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}
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// ignore: public_member_api_docs
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class ApiException extends ApiErrorModel implements Exception {
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  // ignore: public_member_api_docs
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  ApiException(super.payload);
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  @override
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  String toString() => 'ApiException[$code]: $message';
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}
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