refactor: Clean up ApiClient code structure and improve readability
This commit is contained in:
Nils-Johan Gynther
@@ -1,140 +1,131 @@
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import 'dart:convert';
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import 'dart:convert';
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import 'package:http/http.dart' as http;
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import 'package:http/http.dart' as http;
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import 'api_exception.dart';
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import 'api_exception.dart';
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/// Platform-neutral HTTP client.
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/// Platform-neutral HTTP client.
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/// API base URL is injected at build time via --dart-define=API_BASE_URL.
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/// API base URL is injected at build time via --dart-define=API_BASE_URL.
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/// Default is same-origin '/api' to avoid mixed-content on HTTPS sites.
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/// Default is same-origin '/api' to avoid mixed-content on HTTPS sites.
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class ApiClient {
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class ApiClient {
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final String baseUrl;
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final String baseUrl;
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final http.Client _client;
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final http.Client _client;
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ApiClient({http.Client? client})
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ApiClient({http.Client? client})
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: baseUrl = const String.fromEnvironment(
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: baseUrl = const String.fromEnvironment(
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'API_BASE_URL',
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'API_BASE_URL',
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defaultValue: '/api',
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defaultValue: '/api',
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),
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),
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_client = client ?? http.Client();
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_client = client ?? http.Client();
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Map<String, String> _headers({String? token}) => {
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Map<String, String> _headers({String? token}) => {
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'Content-Type': 'application/json',
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'Content-Type': 'application/json',
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if (token != null) 'Authorization': 'Bearer $token',
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if (token != null) 'Authorization': 'Bearer $token',
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};
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};
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Future<dynamic> getJson(String path, {String? token}) async {
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Future<dynamic> getJson(String path, {String? token}) async {
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final response = await _client.get(
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final response = await _client.get(
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Uri.parse('$baseUrl$path'),
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Uri.parse('$baseUrl$path'),
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headers: _headers(token: token),
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headers: _headers(token: token),
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);
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);
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return _decodeOrNull(_guardResponse(response));
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return _decodeOrNull(_guardResponse(response));
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}
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}
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Future<dynamic> postJson(
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Future<dynamic> postJson(String path, {Object? body, String? token}) async {
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String path, {
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final response = await _client.post(
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Object? body,
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Uri.parse('$baseUrl$path'),
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String? token,
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headers: _headers(token: token),
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}) async {
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body: body == null ? null : jsonEncode(body),
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final response = await _client.post(
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);
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Uri.parse('$baseUrl$path'),
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return _decodeOrNull(_guardResponse(response));
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headers: _headers(token: token),
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}
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body: body == null ? null : jsonEncode(body),
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);
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Future<dynamic> putJson(String path, {Object? body, String? token}) async {
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return _decodeOrNull(_guardResponse(response));
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final response = await _client.put(
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}
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Uri.parse('$baseUrl$path'),
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headers: _headers(token: token),
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Future<dynamic> putJson(
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body: body == null ? null : jsonEncode(body),
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String path, {
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);
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Object? body,
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return _decodeOrNull(_guardResponse(response));
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String? token,
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}
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}) async {
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final response = await _client.put(
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Future<dynamic> patchJson(String path, {Object? body, String? token}) async {
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Uri.parse('$baseUrl$path'),
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final response = await _client.patch(
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headers: _headers(token: token),
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Uri.parse('$baseUrl$path'),
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body: body == null ? null : jsonEncode(body),
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headers: _headers(token: token),
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);
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body: body == null ? null : jsonEncode(body),
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return _decodeOrNull(_guardResponse(response));
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);
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}
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return _decodeOrNull(_guardResponse(response));
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}
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Future<dynamic> patchJson(
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String path, {
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Future<dynamic> deleteJson(String path, {String? token}) async {
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Object? body,
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final response = await _client.delete(
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String? token,
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Uri.parse('$baseUrl$path'),
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}) async {
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headers: _headers(token: token),
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final response = await _client.patch(
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);
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Uri.parse('$baseUrl$path'),
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return _decodeOrNull(_guardResponse(response));
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headers: _headers(token: token),
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}
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body: body == null ? null : jsonEncode(body),
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);
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http.Response _guardResponse(http.Response response) {
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return _decodeOrNull(_guardResponse(response));
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if (response.statusCode >= 200 && response.statusCode < 300) {
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}
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return response;
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}
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}
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final parsedBody = _decodeOrNull(response);
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final parsedBody = _decodeOrNull(response);
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final serverMessage = _extractMessage(parsedBody);
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final serverMessage = _extractMessage(parsedBody);
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if (response.statusCode == 401) {
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if (response.statusCode == 401) {
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throw ApiException(
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throw ApiException(
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type: ApiErrorType.unauthorized,
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type: ApiErrorType.unauthorized,
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statusCode: 401,
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statusCode: 401,
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message: serverMessage ?? 'Unauthorized',
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message: serverMessage ?? 'Unauthorized',
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);
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);
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}
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}
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if (response.statusCode == 403) {
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if (response.statusCode == 403) {
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throw ApiException(
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throw ApiException(
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type: ApiErrorType.forbidden,
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type: ApiErrorType.forbidden,
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statusCode: 403,
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statusCode: 403,
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message: serverMessage ?? 'Forbidden',
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message: serverMessage ?? 'Forbidden',
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);
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);
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}
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}
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if (response.statusCode >= 500) {
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if (response.statusCode >= 500) {
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throw ApiException(
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throw ApiException(
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type: ApiErrorType.server,
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type: ApiErrorType.server,
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statusCode: response.statusCode,
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statusCode: response.statusCode,
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message: serverMessage ?? 'Server error',
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message: serverMessage ?? 'Server error',
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);
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);
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}
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}
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throw ApiException(
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throw ApiException(
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type: ApiErrorType.unknown,
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type: ApiErrorType.unknown,
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statusCode: response.statusCode,
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statusCode: response.statusCode,
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message: serverMessage ?? 'Request failed',
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message: serverMessage ?? 'Request failed',
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);
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);
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}
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}
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dynamic _decodeOrNull(http.Response response) {
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dynamic _decodeOrNull(http.Response response) {
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final body = response.body.trim();
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final body = response.body.trim();
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if (body.isEmpty) {
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if (body.isEmpty) return null;
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return null;
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try {
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}
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return jsonDecode(body);
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} catch (_) {
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try {
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return body;
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return jsonDecode(body);
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}
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} catch (_) {
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}
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return body;
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}
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String? _extractMessage(dynamic parsedBody) {
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}
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if (parsedBody is Map<String, dynamic>) {
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final message = parsedBody['message'];
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String? _extractMessage(dynamic parsedBody) {
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if (message is String && message.trim().isNotEmpty) return message;
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if (parsedBody is Map<String, dynamic>) {
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if (message is List && message.isNotEmpty) {
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final message = parsedBody['message'];
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return message.first.toString();
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if (message is String && message.trim().isNotEmpty) {
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}
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return message;
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final error = parsedBody['error'];
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}
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if (error is String && error.trim().isNotEmpty) return error;
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if (message is List && message.isNotEmpty) {
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}
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return message.first.toString();
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if (parsedBody is String && parsedBody.trim().isNotEmpty) return parsedBody;
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}
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return null;
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final error = parsedBody['error'];
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}
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if (error is String && error.trim().isNotEmpty) {
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return error;
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}
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}
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if (parsedBody is String && parsedBody.trim().isNotEmpty) {
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return parsedBody;
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}
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return null;
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}
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}
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}
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