apidash_core: contents moved into better_networking package

packages/better_networking/lib/services/http_client_manager.dart

@@ -0,0 +1,65 @@
+import 'dart:io';
+import 'package:flutter/foundation.dart';
+import 'package:http/http.dart' as http;
+import 'package:http/io_client.dart';
+
+http.Client createHttpClientWithNoSSL() {
+  var ioClient = HttpClient()
+    ..badCertificateCallback =
+        (X509Certificate cert, String host, int port) => true;
+  return IOClient(ioClient);
+}
+
+class HttpClientManager {
+  static final HttpClientManager _instance = HttpClientManager._internal();
+  static const int _maxCancelledRequests = 100;
+  final Map<String, http.Client> _clients = {};
+  final Set<String> _cancelledRequests = {};
+
+  factory HttpClientManager() {
+    return _instance;
+  }
+
+  HttpClientManager._internal();
+
+  http.Client createClient(
+    String requestId, {
+    bool noSSL = false,
+  }) {
+    final client =
+        (noSSL && !kIsWeb) ? createHttpClientWithNoSSL() : http.Client();
+    _clients[requestId] = client;
+    return client;
+  }
+
+  void cancelRequest(String? requestId) {
+    if (requestId != null && _clients.containsKey(requestId)) {
+      _clients[requestId]?.close();
+      _clients.remove(requestId);
+
+      _cancelledRequests.add(requestId);
+      if (_cancelledRequests.length > _maxCancelledRequests) {
+        _cancelledRequests.remove(_cancelledRequests.first);
+      }
+    }
+  }
+
+  bool wasRequestCancelled(String requestId) {
+    return _cancelledRequests.contains(requestId);
+  }
+
+  void removeCancelledRequest(String requestId) {
+    _cancelledRequests.remove(requestId);
+  }
+
+  void closeClient(String requestId) {
+    if (_clients.containsKey(requestId)) {
+      _clients[requestId]?.close();
+      _clients.remove(requestId);
+    }
+  }
+
+  bool hasActiveClient(String requestId) {
+    return _clients.containsKey(requestId);
+  }
+}