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1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file | |
2 // for details. All rights reserved. Use of this source code is governed by a | |
3 // BSD-style license that can be found in the LICENSE file. | |
4 library pop_pop_win.game_storage; | |
5 | |
6 import 'dart:async'; | |
7 | |
8 import 'game.dart'; | |
9 import 'platform.dart'; | |
10 | |
11 class GameStorage { | |
12 static const _gameCountKey = 'gameCount'; | |
13 final StreamController _bestTimeUpdated = new StreamController(); | |
14 final Map<String, String> _cache = new Map<String, String>(); | |
15 | |
16 Future<int> get gameCount => _getIntValue(_gameCountKey); | |
17 | |
18 Stream get bestTimeUpdated => _bestTimeUpdated.stream; | |
19 | |
20 void recordState(GameState state) { | |
21 assert(state != null); | |
22 _incrementIntValue(state.name); | |
23 } | |
24 | |
25 Future<bool> updateBestTime(Game game) { | |
26 assert(game != null); | |
27 assert(game.state == GameState.won); | |
28 | |
29 var w = game.field.width; | |
30 var h = game.field.height; | |
31 var m = game.field.bombCount; | |
32 var duration = game.duration.inMilliseconds; | |
33 | |
34 var key = _getKey(w, h, m); | |
35 | |
36 return _getIntValue(key, null).then((int currentScore) { | |
37 if (currentScore == null || currentScore > duration) { | |
38 _setIntValue(key, duration); | |
39 _bestTimeUpdated.add(null); | |
40 return true; | |
41 } else { | |
42 return false; | |
43 } | |
44 }); | |
45 } | |
46 | |
47 Future<int> getBestTimeMilliseconds(int width, int height, int bombCount) { | |
48 final key = _getKey(width, height, bombCount); | |
49 return _getIntValue(key, null); | |
50 } | |
51 | |
52 Future reset() { | |
53 _cache.clear(); | |
54 return targetPlatform.clearValues(); | |
55 } | |
56 | |
57 Future<int> _getIntValue(String key, [int defaultValue = 0]) { | |
58 assert(key != null); | |
59 if (_cache.containsKey(key)) { | |
60 return new Future.value(_parseValue(_cache[key], defaultValue)); | |
61 } | |
62 | |
63 return targetPlatform.getValue(key).then((String strValue) { | |
64 _cache[key] = strValue; | |
65 return _parseValue(strValue, defaultValue); | |
66 }); | |
67 } | |
68 | |
69 Future _setIntValue(String key, int value) { | |
70 assert(key != null); | |
71 _cache.remove(key); | |
72 String val = (value == null) ? null : value.toString(); | |
73 return targetPlatform.setValue(key, val); | |
74 } | |
75 | |
76 Future _incrementIntValue(String key) { | |
77 return _getIntValue(key).then((int val) { | |
78 return _setIntValue(key, val + 1); | |
79 }); | |
80 } | |
81 | |
82 static String _getKey(int w, int h, int m) => "w$w-h$h-m$m"; | |
83 | |
84 static int _parseValue(String value, int defaultValue) { | |
85 if (value == null) { | |
86 return defaultValue; | |
87 } else { | |
88 return int.parse(value); | |
89 } | |
90 } | |
91 } | |
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