1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/common/extensions/sync_helper.h"
6
7#include "base/logging.h"
8#include "chrome/common/extensions/api/plugins/plugins_handler.h"
9#include "chrome/common/extensions/extension_constants.h"
10#include "chrome/common/extensions/manifest_url_handler.h"
11#include "extensions/common/constants.h"
12#include "extensions/common/extension.h"
13#include "extensions/common/manifest.h"
14#include "extensions/common/permissions/permissions_data.h"
15
16namespace extensions {
17namespace sync_helper {
18
19namespace {
20
21enum SyncType {
22  SYNC_TYPE_NONE = 0,
23  SYNC_TYPE_EXTENSION,
24  SYNC_TYPE_APP
25};
26
27SyncType GetSyncType(const Extension* extension) {
28  if (!IsSyncable(extension)) {
29    // We have a non-standard location.
30    return SYNC_TYPE_NONE;
31  }
32
33  // Disallow extensions with non-gallery auto-update URLs for now.
34  //
35  // TODO(akalin): Relax this restriction once we've put in UI to
36  // approve synced extensions.
37  if (!ManifestURL::GetUpdateURL(extension).is_empty() &&
38      !ManifestURL::UpdatesFromGallery(extension)) {
39    return SYNC_TYPE_NONE;
40  }
41
42  // Disallow extensions with native code plugins.
43  //
44  // TODO(akalin): Relax this restriction once we've put in UI to
45  // approve synced extensions.
46  if (PluginInfo::HasPlugins(extension) ||
47      extension->permissions_data()->HasAPIPermission(APIPermission::kPlugin)) {
48    return SYNC_TYPE_NONE;
49  }
50
51  switch (extension->GetType()) {
52    case Manifest::TYPE_EXTENSION:
53      return SYNC_TYPE_EXTENSION;
54
55    case Manifest::TYPE_USER_SCRIPT:
56      // We only want to sync user scripts with gallery update URLs.
57      if (ManifestURL::UpdatesFromGallery(extension))
58        return SYNC_TYPE_EXTENSION;
59      return SYNC_TYPE_NONE;
60
61    case Manifest::TYPE_HOSTED_APP:
62    case Manifest::TYPE_LEGACY_PACKAGED_APP:
63    case Manifest::TYPE_PLATFORM_APP:
64      return SYNC_TYPE_APP;
65
66    case Manifest::TYPE_UNKNOWN:
67    // Confusingly, themes are actually synced.
68    // TODO(yoz): Make this look less inconsistent.
69    case Manifest::TYPE_THEME:
70    case Manifest::TYPE_SHARED_MODULE:
71      return SYNC_TYPE_NONE;
72
73    case Manifest::NUM_LOAD_TYPES:
74      NOTREACHED();
75  }
76  NOTREACHED();
77  return SYNC_TYPE_NONE;
78}
79
80}  // namespace
81
82bool IsSyncable(const Extension* extension) {
83  // TODO(akalin): Figure out if we need to allow some other types.
84
85  // Default apps are not synced because otherwise they will pollute profiles
86  // that don't already have them. Specially, if a user doesn't have default
87  // apps, creates a new profile (which get default apps) and then enables sync
88  // for it, then their profile everywhere gets the default apps.
89  bool is_syncable = (extension->location() == Manifest::INTERNAL &&
90                      !extension->was_installed_by_default());
91  // Sync the chrome web store to maintain its position on the new tab page.
92  is_syncable |= (extension->id() == extensions::kWebStoreAppId);
93  // Sync the chrome component app to maintain its position on the app list.
94  is_syncable |= (extension->id() == extension_misc::kChromeAppId);
95  return is_syncable;
96}
97
98bool IsSyncableExtension(const Extension* extension) {
99  return GetSyncType(extension) == SYNC_TYPE_EXTENSION;
100}
101
102bool IsSyncableApp(const Extension* extension) {
103  return GetSyncType(extension) == SYNC_TYPE_APP;
104}
105
106}  // namespace sync_helper
107}  // namespace extensions
108