[linting_tool] Implement saving rules to DB (#860)

experimental/linting_tool/lib/repository/api_provider.dart

@@ -8,9 +8,12 @@ import 'package:linting_tool/model/rule.dart';
 
 class APIProvider {
   final _baseURL = 'https://dart-lang.github.io/linter';
+  final http.Client httpClient;
+  APIProvider(this.httpClient);
+
   Future<List<Rule>> getRulesList() async {
     http.Response response =
-        await http.get(Uri.parse('$_baseURL//lints/machine/rules.json'));
+        await httpClient.get(Uri.parse('$_baseURL//lints/machine/rules.json'));
 
     if (response.statusCode == 200) {
       List<Rule> rulesList = [];

experimental/linting_tool/lib/repository/hive_service.dart

@@ -0,0 +1,77 @@
+// Copyright 2021 The Flutter team. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+import 'package:hive/hive.dart';
+
+class HiveService {
+  static Future<bool> addBox<T>(T item, String boxName) async {
+    final openBox = await Hive.openLazyBox<T>(
+      boxName,
+    );
+
+    List<T> existingProducts = await getBoxes(boxName);
+
+    if (!existingProducts.contains(item)) {
+      openBox.add(item);
+      return true;
+    }
+    return false;
+  }
+
+  static Future addBoxes<T>(List<T> items, String boxName) async {
+    final openBox = await Hive.openLazyBox<T>(
+      boxName,
+    );
+
+    List<T> existingProducts = await getBoxes(boxName);
+
+    for (var item in items) {
+      if (!existingProducts.contains(item)) {
+        openBox.add(item);
+      }
+    }
+  }
+
+  static Future deleteBox<T>(T item, String boxName) async {
+    final openBox = await Hive.openLazyBox<T>(
+      boxName,
+    );
+
+    List<T> boxes = await getBoxes(boxName);
+
+    for (var box in boxes) {
+      if (box == item) {
+        openBox.deleteAt(boxes.indexOf(item));
+      }
+    }
+  }
+
+  static Future updateBox<T>(T item, T newItem, String boxName) async {
+    final openBox = await Hive.openLazyBox<T>(
+      boxName,
+    );
+
+    List<T> boxes = await getBoxes(boxName);
+
+    for (var box in boxes) {
+      if (box == item) {
+        openBox.putAt(boxes.indexOf(item), newItem);
+      }
+    }
+  }
+
+  static Future<List<T>> getBoxes<T>(String boxName, [String? query]) async {
+    List<T> boxList = [];
+
+    final openBox = await Hive.openLazyBox<T>(boxName);
+
+    int length = openBox.length;
+
+    for (int i = 0; i < length; i++) {
+      boxList.add(await openBox.getAt(i) as T);
+    }
+
+    return boxList;
+  }
+}

experimental/linting_tool/lib/repository/repository.dart

@@ -4,9 +4,14 @@
 
 import 'package:linting_tool/model/rule.dart';
 import 'package:linting_tool/repository/api_provider.dart';
+import 'package:http/http.dart' as http;
 
 class Repository {
-  final _apiProvider = APIProvider();
+  late final APIProvider _apiProvider;
+
+  Repository(http.Client httpClient) {
+    _apiProvider = APIProvider(httpClient);
+  }
 
   Future<List<Rule>> getRulesList() => _apiProvider.getRulesList();
 }