⚡ Rewrite http client

lib/utils/http.dart

@@ -0,0 +1,67 @@
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+import 'package:solian/utils/service_url.dart';
+
+class HttpClient extends http.BaseClient {
+  final bool isUnauthorizedRetry;
+  final Future<String> Function()? onUnauthorizedRetry;
+  final Function(String atk, String rtk)? onTokenRefreshed;
+
+  final _client = http.Client();
+
+  HttpClient({
+    this.isUnauthorizedRetry = true,
+    this.onUnauthorizedRetry,
+    this.onTokenRefreshed,
+    String? defaultToken,
+    String? defaultRefreshToken,
+  }) {
+    currentToken = defaultToken;
+    currentRefreshToken = defaultRefreshToken;
+  }
+
+  String? currentToken;
+  String? currentRefreshToken;
+
+  Future<String> refreshToken(String token) async {
+    final res = await _client.post(
+      getRequestUri('passport', '/api/auth/token'),
+      headers: {'Content-Type': 'application/json'},
+      body: jsonEncode({'refresh_token': token, 'grant_type': 'refresh_token'}),
+    );
+    if (res.statusCode != 200) {
+      var message = utf8.decode(res.bodyBytes);
+      throw Exception('An error occurred when trying refresh token: $message');
+    }
+    final result = jsonDecode(utf8.decode(res.bodyBytes));
+    currentToken = result['access_token'];
+    currentRefreshToken = result['refresh_token'];
+    if (onTokenRefreshed != null) {
+      onTokenRefreshed!(currentToken!, currentRefreshToken!);
+    }
+    return currentToken!;
+  }
+
+  @override
+  Future<http.StreamedResponse> send(http.BaseRequest request) async {
+    request.headers['Authorization'] = 'Bearer $currentToken';
+
+    final res = await _client.send(request);
+    if (res.statusCode == 401 && isUnauthorizedRetry) {
+      if (onUnauthorizedRetry != null) {
+        currentToken = await onUnauthorizedRetry!();
+      } else if (currentRefreshToken != null) {
+        currentToken = await refreshToken(currentRefreshToken!);
+      } else {
+        final result = await http.Response.fromStream(res);
+        throw Exception(utf8.decode(result.bodyBytes));
+      }
+
+      request.headers['Authorization'] = 'Bearer $currentToken';
+      return await _client.send(request);
+    }
+
+    return res;
+  }
+}