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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 package org.chromium.chrome.browser.webapps; | 5 package org.chromium.chrome.browser.webapps; |
6 | 6 |
7 import android.content.Context; | 7 import android.content.Context; |
8 import android.content.SharedPreferences; | 8 import android.content.SharedPreferences; |
9 import android.os.AsyncTask; | 9 import android.os.AsyncTask; |
10 | 10 |
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21 * | 21 * |
22 * It is NOT intended to be 100% accurate nor a comprehensive list of all instal
led web apps | 22 * It is NOT intended to be 100% accurate nor a comprehensive list of all instal
led web apps |
23 * because it is impossible to track when the user removes a web app from the Ho
me screen and it | 23 * because it is impossible to track when the user removes a web app from the Ho
me screen and it |
24 * is similarily impossible to track pre-registry era web apps (this case is not
a problem anyway | 24 * is similarily impossible to track pre-registry era web apps (this case is not
a problem anyway |
25 * as these web apps have no external data to cleanup). | 25 * as these web apps have no external data to cleanup). |
26 */ | 26 */ |
27 public class WebappRegistry { | 27 public class WebappRegistry { |
28 | 28 |
29 static final String REGISTRY_FILE_NAME = "webapp_registry"; | 29 static final String REGISTRY_FILE_NAME = "webapp_registry"; |
30 static final String KEY_WEBAPP_SET = "webapp_set"; | 30 static final String KEY_WEBAPP_SET = "webapp_set"; |
| 31 static final String KEY_LAST_CLEANUP = "last_cleanup"; |
| 32 |
| 33 /** Represents a period of 4 weeks in milliseconds */ |
| 34 static final long FULL_CLEANUP_DURATION = 4 * 7 * 24 * 60 * 60 * 1000; |
| 35 |
| 36 /** Represents a period of 13 weeks in milliseconds */ |
| 37 static final long WEBAPP_UNOPENED_CLEANUP_DURATION = 13 * 7 * 24 * 60 * 60 *
1000; |
31 | 38 |
32 /** | 39 /** |
33 * Called when a retrieval of the stored web apps occurs. | 40 * Called when a retrieval of the stored web apps occurs. |
34 */ | 41 */ |
35 public interface FetchCallback { | 42 public interface FetchCallback { |
36 public void onWebappIdsRetrieved(Set<String> readObject); | 43 public void onWebappIdsRetrieved(Set<String> readObject); |
37 } | 44 } |
38 | 45 |
39 /** | 46 /** |
40 * Registers the existence of a web app and creates the SharedPreference for
it. | 47 * Registers the existence of a web app and creates the SharedPreference for
it. |
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74 } | 81 } |
75 | 82 |
76 @Override | 83 @Override |
77 protected final void onPostExecute(Set<String> result) { | 84 protected final void onPostExecute(Set<String> result) { |
78 callback.onWebappIdsRetrieved(result); | 85 callback.onWebappIdsRetrieved(result); |
79 } | 86 } |
80 }.execute(); | 87 }.execute(); |
81 } | 88 } |
82 | 89 |
83 /** | 90 /** |
| 91 * Deletes the data for all "old" web apps. i.e. web apps which have not bee
n opened by the user |
| 92 * in the last 3 months. Cleanup is run, at most, once a month. |
| 93 * @param context Context to open the registry with. |
| 94 * @param currentTime The current time which will be checked to decide if th
e task should be run |
| 95 * and if a web app should be cleaned up. |
| 96 */ |
| 97 static void unregisterOldWebapps(final Context context, final long currentTi
me) { |
| 98 new AsyncTask<Void, Void, Void>() { |
| 99 @Override |
| 100 protected final Void doInBackground(Void... nothing) { |
| 101 SharedPreferences preferences = openSharedPreferences(context); |
| 102 long lastCleanup = preferences.getLong(KEY_LAST_CLEANUP, 0); |
| 103 if (currentTime - lastCleanup < FULL_CLEANUP_DURATION) return nu
ll; |
| 104 |
| 105 Set<String> currentWebapps = getRegisteredWebappIds(preferences)
; |
| 106 Set<String> retainedWebapps = new HashSet<String>(currentWebapps
); |
| 107 for (String id : currentWebapps) { |
| 108 long lastUsed = new WebappDataStorage(context, id).getLastUs
edTime(); |
| 109 if (currentTime - lastUsed >= WEBAPP_UNOPENED_CLEANUP_DURATI
ON) { |
| 110 WebappDataStorage.deleteDataForWebapp(context, id); |
| 111 retainedWebapps.remove(id); |
| 112 } |
| 113 } |
| 114 |
| 115 preferences.edit() |
| 116 .putLong(KEY_LAST_CLEANUP, currentTime) |
| 117 .putStringSet(KEY_WEBAPP_SET, retainedWebapps) |
| 118 .commit(); |
| 119 return null; |
| 120 } |
| 121 }.execute(); |
| 122 } |
| 123 |
| 124 /** |
84 * Deletes the data of all web apps, as well as the registry tracking the we
b apps. | 125 * Deletes the data of all web apps, as well as the registry tracking the we
b apps. |
85 */ | 126 */ |
86 @VisibleForTesting | 127 @VisibleForTesting |
87 static void unregisterAllWebapps(final Context context, final Runnable callb
ack) { | 128 static void unregisterAllWebapps(final Context context, final Runnable callb
ack) { |
88 new AsyncTask<Void, Void, Void>() { | 129 new AsyncTask<Void, Void, Void>() { |
89 @Override | 130 @Override |
90 protected final Void doInBackground(Void... nothing) { | 131 protected final Void doInBackground(Void... nothing) { |
91 SharedPreferences preferences = openSharedPreferences(context); | 132 SharedPreferences preferences = openSharedPreferences(context); |
92 for (String id : getRegisteredWebappIds(preferences)) { | 133 for (String id : getRegisteredWebappIds(preferences)) { |
93 WebappDataStorage.deleteDataForWebapp(context, id); | 134 WebappDataStorage.deleteDataForWebapp(context, id); |
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120 | 161 |
121 private static Set<String> getRegisteredWebappIds(SharedPreferences preferen
ces) { | 162 private static Set<String> getRegisteredWebappIds(SharedPreferences preferen
ces) { |
122 return preferences.getStringSet(KEY_WEBAPP_SET, Collections.<String>empt
ySet()); | 163 return preferences.getStringSet(KEY_WEBAPP_SET, Collections.<String>empt
ySet()); |
123 } | 164 } |
124 | 165 |
125 private WebappRegistry() { | 166 private WebappRegistry() { |
126 } | 167 } |
127 | 168 |
128 private static native void nativeOnWebappsUnregistered(long callbackPointer)
; | 169 private static native void nativeOnWebappsUnregistered(long callbackPointer)
; |
129 } | 170 } |
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