81 lines
1.6 KiB
Dart
81 lines
1.6 KiB
Dart
import 'dart:convert';
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import 'package:shared_preferences/shared_preferences.dart';
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class UPCache {
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SharedPreferences? _prefs;
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static UPCache? _instance;
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UPCache.of() {
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init();
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}
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UPCache._pre(SharedPreferences prefs) {
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_prefs = prefs;
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}
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static UPCache getInstance() {
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_instance ??= UPCache.of();
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return _instance!;
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}
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void init() async {
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_prefs ??= await SharedPreferences.getInstance();
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}
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static Future<UPCache> preInit() async {
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if (_instance == null) {
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var prefs = await SharedPreferences.getInstance();
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_instance = UPCache._pre(prefs);
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}
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return _instance!;
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}
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void setData<T>(String key, T data) {
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if (data is String) {
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_prefs?.setString(key, data);
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} else if (data is double) {
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_prefs?.setDouble(key, data);
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} else if (data is int) {
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_prefs?.setInt(key, data);
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} else if (data is bool) {
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_prefs?.setBool(key, data);
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} else if (data is List<String>) {
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_prefs?.setStringList(key, data);
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}
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}
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void setJson(key, value) {
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value = jsonEncode(value);
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_prefs?.setString(key, value);
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}
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Map<String, dynamic>? getJson(key) {
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String? result = _prefs?.getString(key);
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if (result != null) {
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return jsonDecode(result);
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}
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return null;
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}
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void remove(String key) {
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_prefs?.remove(key);
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}
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T? get<T>(String key) {
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var value = _prefs?.get(key);
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if (value != null) {
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return value as T;
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}
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return null;
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}
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List<String> getStringList(String key) {
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var value = _prefs?.getStringList(key);
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if (value != null) {
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return value;
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}
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return [];
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}
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}
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