add: abModel

Signed-off-by: Kingtous <kingtous@qq.com>

flutter/lib/models/ab_model.dart

@@ -0,0 +1,56 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter_hbb/models/model.dart';
+import 'package:http/http.dart' as http;
+
+class AbModel with ChangeNotifier {
+  var abLoading = false;
+  var abError = "";
+  var tags = [];
+  var peers = [];
+
+  WeakReference<FFI> parent;
+
+  AbModel(this.parent);
+
+  FFI? get _ffi => parent.target;
+
+  Future<dynamic> getAb() async {
+    abLoading = true;
+    notifyListeners();
+    // request
+    final api = "${await getApiServer()}/api/ab/get";
+    debugPrint("request $api with post ${await _getHeaders()}");
+    final resp = await http.post(Uri.parse(api), headers: await _getHeaders());
+    abLoading = false;
+    Map<String, dynamic> json = jsonDecode(resp.body);
+    if (json.containsKey('error')) {
+      abError = json['error'];
+    } else if (json.containsKey('data')) {
+      // {"tags":["aaa","bbb"],
+      // "peers":[{"id":"aa1234","username":"selfd",
+      // "hostname":"PC","platform":"Windows","tags":["aaa"]}]}
+      final data = jsonDecode(json['data']);
+      tags = data['tags'];
+      peers = data['peers'];
+    }
+    print(json);
+    notifyListeners();
+    return resp.body;
+  }
+
+  Future<String> getApiServer() async {
+    return await _ffi?.bind.mainGetApiServer() ?? "";
+  }
+
+  void reset() {
+    tags.clear();
+    peers.clear();
+    notifyListeners();
+  }
+
+  Future<Map<String, String>>? _getHeaders() {
+    return _ffi?.getHttpHeaders();
+  }
+}