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1/**
2 * Copyright (c) 2022 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16import data_preferences from '@ohos.data.preferences';
17
18const NAME: string = "CONTACT_PREFERENCE";
19type ValueType = number | string | boolean | Array<number> | Array<string> | Array<boolean>;
20
21class SharedPreferencesUtils {
22  private mPreferences: data_preferences.Preferences;
23  private context: Context;
24
25  constructor() {
26    this.getPreferences().then((data) => {
27      this.mPreferences = data;
28    })
29  }
30
31  /*
32   * init if Call From serviceAbility globalThis.context is Null
33   *@param ctx Context used for dataShare
34   */
35  init(ctx: Context) {
36    this.context = ctx;
37  }
38
39  /**
40   * getFromPreferences
41   *
42   * @return the value get from Preferences
43   */
44  public async getFromPreferences(key: string, defValue) {
45    let preferences: data_preferences.Preferences = await this.getPreferences();
46    return await preferences.get(key, defValue);
47  }
48
49  /**
50   * saveToPreferences
51   *
52   * @param key save to Preferences
53   * @param value save to Preferences
54   */
55  public async saveToPreferences(key: string, value: ValueType) {
56    let preferences: data_preferences.Preferences = await this.getPreferences();
57    await preferences.put(key, value);
58    preferences.flush()
59  }
60
61  private async getPreferences() {
62    if (this.mPreferences) {
63      return this.mPreferences;
64    }
65    return await data_preferences.getPreferences(globalThis.context ? globalThis.context : this.context, NAME);
66  }
67}
68
69export const sharedPreferencesUtils: SharedPreferencesUtils = new SharedPreferencesUtils();