1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
|
// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ash/ambient/managed/screensaver_images_policy_handler.h"
#include <memory>
#include "ash/constants/ash_paths.h"
#include "ash/public/cpp/ambient/ambient_client.h"
#include "ash/public/cpp/ambient/ambient_prefs.h"
#include "ash/session/session_controller_impl.h"
#include "ash/shell.h"
#include "base/base_paths.h"
#include "base/check.h"
#include "base/check_deref.h"
#include "base/files/file_path.h"
#include "base/functional/callback.h"
#include "base/logging.h"
#include "base/path_service.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
#include "services/network/public/cpp/shared_url_loader_factory.h"
namespace ash {
namespace {
constexpr char kCacheDirectoryName[] = "managed_screensaver";
constexpr char kManagedGuestsCacheDirectoryPath[] = "guest";
constexpr char kSigninCacheDirectoryPath[] = "signin";
base::FilePath GetPolicyHandlerCachePath(
ScreensaverImagesPolicyHandler::HandlerType state) {
switch (state) {
case ScreensaverImagesPolicyHandler::HandlerType::kSignin:
return base::PathService::CheckedGet(
ash::DIR_DEVICE_POLICY_SCREENSAVER_DATA)
.AppendASCII(kSigninCacheDirectoryPath);
case ScreensaverImagesPolicyHandler::HandlerType::kManagedGuest:
return base::PathService::CheckedGet(
ash::DIR_DEVICE_POLICY_SCREENSAVER_DATA)
.AppendASCII(kManagedGuestsCacheDirectoryPath);
case ScreensaverImagesPolicyHandler::HandlerType::kUser:
return base::PathService::CheckedGet(base::DIR_HOME)
.AppendASCII(kCacheDirectoryName);
}
}
ScreensaverImagesPolicyHandler::HandlerType GetHandlerState(
PrefService* pref_service) {
auto* session_controller = Shell::Get()->session_controller();
if (pref_service == session_controller->GetPrimaryUserPrefService() &&
session_controller->IsUserPublicAccount()) {
return ScreensaverImagesPolicyHandler::HandlerType::kManagedGuest;
}
if (pref_service == session_controller->GetPrimaryUserPrefService()) {
return ScreensaverImagesPolicyHandler::HandlerType::kUser;
}
if (pref_service == session_controller->GetSigninScreenPrefService()) {
return ScreensaverImagesPolicyHandler::HandlerType::kSignin;
}
LOG(DFATAL) << "Invalid pref store detected";
return ScreensaverImagesPolicyHandler::HandlerType::kSignin;
}
scoped_refptr<network::SharedURLLoaderFactory> GetUrlLoaderFactory(
ScreensaverImagesPolicyHandler::HandlerType state) {
AmbientClient& ambient_client = CHECK_DEREF(AmbientClient::Get());
switch (state) {
case ScreensaverImagesPolicyHandler::HandlerType::kSignin:
return ambient_client.GetSigninURLLoaderFactory();
case ScreensaverImagesPolicyHandler::HandlerType::kManagedGuest:
case ScreensaverImagesPolicyHandler::HandlerType::kUser:
return ambient_client.GetURLLoaderFactory();
}
}
} // namespace
// static
std::unique_ptr<ScreensaverImagesPolicyHandler>
ScreensaverImagesPolicyHandler::Create(PrefService* pref_service) {
// TODO(b/282134276): Move to a separate factory class to move creation
// complexity out of this class and isolate it,
HandlerType state = GetHandlerState(pref_service);
return std::make_unique<ScreensaverImagesPolicyHandler>(pref_service, state);
}
// static
void ScreensaverImagesPolicyHandler::RegisterPrefs(
PrefRegistrySimple* registry) {
registry->RegisterListPref(
ambient::prefs::kAmbientModeManagedScreensaverImages);
}
ScreensaverImagesPolicyHandler::ScreensaverImagesPolicyHandler(
PrefService* pref_service,
HandlerType state) {
CHECK(pref_service);
pref_service_ = pref_service;
auto url_loader_factory = GetUrlLoaderFactory(state);
base::FilePath cache_path = GetPolicyHandlerCachePath(state);
image_downloader_ = std::make_unique<ScreensaverImageDownloader>(
url_loader_factory, cache_path,
base::BindRepeating(
&ScreensaverImagesPolicyHandler::OnDownloadedImageListUpdated,
base::Unretained(this)));
pref_change_registrar_ = std::make_unique<PrefChangeRegistrar>();
pref_change_registrar_->Init(pref_service);
// TODO(b/286011972): Consider observing kAmbientModeManagedScreensaverEnabled
// pref to clean up the cache when the policy is set to false.
// TODO(b/271093110): Use weak ptr factory for this callback.
pref_change_registrar_->Add(
ambient::prefs::kAmbientModeManagedScreensaverImages,
base::BindRepeating(&ScreensaverImagesPolicyHandler::
OnAmbientModeManagedScreensaverImagesPrefChanged,
base::Unretained(this)));
OnAmbientModeManagedScreensaverImagesPrefChanged();
}
ScreensaverImagesPolicyHandler::~ScreensaverImagesPolicyHandler() = default;
void ScreensaverImagesPolicyHandler::
OnAmbientModeManagedScreensaverImagesPrefChanged() {
const PrefService::Preference& images_pref =
CHECK_DEREF(pref_service_->FindPreference(
ash::ambient::prefs::kAmbientModeManagedScreensaverImages));
// Ignore default value (not set by policy) to prevent cache invalidation.
if (images_pref.IsDefaultValue() && !IsManagedScreensaverDisabledByPolicy()) {
return;
}
image_downloader_->UpdateImageUrlList(images_pref.GetValue()->GetList());
}
bool ScreensaverImagesPolicyHandler::IsManagedScreensaverDisabledByPolicy() {
const PrefService::Preference& enabled_pref =
CHECK_DEREF(pref_service_->FindPreference(
ash::ambient::prefs::kAmbientModeManagedScreensaverEnabled));
return !enabled_pref.IsDefaultValue() && !enabled_pref.GetValue()->GetBool();
}
void ScreensaverImagesPolicyHandler::OnDownloadedImageListUpdated(
const std::vector<base::FilePath>& images) {
if (on_images_updated_callback_) {
on_images_updated_callback_.Run(images);
}
}
void ScreensaverImagesPolicyHandler::SetScreensaverImagesUpdatedCallback(
ScreensaverImagesRepeatingCallback callback) {
CHECK(callback);
on_images_updated_callback_ = std::move(callback);
}
void ScreensaverImagesPolicyHandler::SetImagesForTesting(
const std::vector<base::FilePath>& images_file_paths) {
image_downloader_->SetImagesForTesting(images_file_paths); // IN-TEST
// Also fire the callback so that test expectations are met.
if (on_images_updated_callback_) {
on_images_updated_callback_.Run(images_file_paths);
}
}
std::vector<base::FilePath>
ScreensaverImagesPolicyHandler::GetScreensaverImages() {
if (image_downloader_) {
return image_downloader_->GetScreensaverImages();
}
return std::vector<base::FilePath>();
}
} // namespace ash
|
