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// Copyright 2017 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/app_mode/kiosk_app_data_base.h"
#include <cstddef>
#include <memory>
#include <string>
#include <string_view>
#include <utility>
#include <vector>
#include "base/files/file_util.h"
#include "base/functional/bind.h"
#include "base/location.h"
#include "base/logging.h"
#include "base/task/task_traits.h"
#include "base/task/thread_pool.h"
#include "base/threading/scoped_blocking_call.h"
#include "chrome/browser/ash/app_mode/kiosk_app_icon_loader.h"
#include "chrome/browser/browser_process.h"
#include "components/account_id/account_id.h"
#include "components/prefs/pref_service.h"
#include "components/prefs/scoped_user_pref_update.h"
#include "content/public/browser/browser_thread.h"
#include "ui/gfx/codec/png_codec.h"
using content::BrowserThread;
namespace ash {
namespace {
// Keys for local state data.
constexpr char kKeyName[] = "name";
constexpr char kKeyIcon[] = "icon";
// Icon file extension.
constexpr char kIconFileExtension[] = ".png";
// Save `raw_icon` for given `app_id`.
void SaveIconToLocalOnBlockingPool(const base::FilePath& icon_path,
std::vector<unsigned char> image_data) {
base::ScopedBlockingCall scoped_blocking_call(FROM_HERE,
base::BlockingType::MAY_BLOCK);
const base::FilePath dir = icon_path.DirName();
if (!base::PathExists(dir) && !base::CreateDirectory(dir)) {
LOG(ERROR) << "Failed to create directory to store kiosk icons";
return;
}
if (!base::WriteFile(icon_path, image_data)) {
LOG(ERROR) << "Failed to write kiosk icon file";
}
}
void RemoveDictionaryPath(base::Value::Dict& dict, std::string_view path) {
std::string_view current_path(path);
base::Value::Dict* current_dictionary = &dict;
size_t delimiter_position = current_path.rfind('.');
if (delimiter_position != std::string_view::npos) {
current_dictionary =
dict.FindDictByDottedPath(current_path.substr(0, delimiter_position));
if (!current_dictionary) {
return;
}
current_path = current_path.substr(delimiter_position + 1);
}
current_dictionary->Remove(current_path);
}
} // namespace
// static
const char KioskAppDataBase::kKeyApps[] = "apps";
KioskAppDataBase::KioskAppDataBase(const std::string& dictionary_name,
const std::string& app_id,
const AccountId& account_id)
: dictionary_name_(dictionary_name),
app_id_(app_id),
account_id_(account_id) {}
KioskAppDataBase::~KioskAppDataBase() = default;
void KioskAppDataBase::SaveToDictionary(ScopedDictPrefUpdate& dict_update) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
const std::string app_key = std::string(kKeyApps) + '.' + app_id_;
const std::string name_key = app_key + '.' + kKeyName;
const std::string icon_path_key = app_key + '.' + kKeyIcon;
dict_update->SetByDottedPath(name_key, name_);
dict_update->SetByDottedPath(icon_path_key, icon_path_.value());
}
void KioskAppDataBase::SaveIconToDictionary(ScopedDictPrefUpdate& dict_update) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
const std::string app_key = std::string(kKeyApps) + '.' + app_id_;
const std::string icon_path_key = app_key + '.' + kKeyIcon;
dict_update->SetByDottedPath(icon_path_key, icon_path_.value());
}
bool KioskAppDataBase::LoadFromDictionary(const base::Value::Dict& dict) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
const std::string app_key =
std::string(KioskAppDataBase::kKeyApps) + '.' + app_id_;
const std::string name_key = app_key + '.' + kKeyName;
const std::string icon_path_key = app_key + '.' + kKeyIcon;
// If there is no title stored, do not stop, sometimes only icon is cached.
const std::string* maybe_name = dict.FindStringByDottedPath(name_key);
if (maybe_name) {
name_ = *maybe_name;
}
const std::string* icon_path_string =
dict.FindStringByDottedPath(icon_path_key);
if (!icon_path_string) {
return false;
}
icon_path_ = base::FilePath(*icon_path_string);
return true;
}
void KioskAppDataBase::DecodeIcon(KioskAppIconLoader::ResultCallback callback) {
DLOG_IF(ERROR, icon_path_.empty()) << "Icon path is empty";
kiosk_app_icon_loader_ =
std::make_unique<KioskAppIconLoader>(std::move(callback));
kiosk_app_icon_loader_->Start(icon_path_);
}
void KioskAppDataBase::SaveIcon(const SkBitmap& icon,
const base::FilePath& cache_dir) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
std::optional<std::vector<uint8_t>> image_data =
gfx::PNGCodec::EncodeBGRASkBitmap(icon, /*discard_transparency=*/false);
if (!image_data) {
LOG(ERROR) << "Failed to encode kiosk icon";
return;
}
const base::FilePath icon_path =
cache_dir.AppendASCII(app_id_).AddExtension(kIconFileExtension);
base::ThreadPool::PostTask(
FROM_HERE, {base::MayBlock()},
base::BindOnce(&SaveIconToLocalOnBlockingPool, icon_path,
std::move(image_data).value()));
icon_path_ = icon_path;
}
void KioskAppDataBase::ClearCache() const {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
PrefService* local_state = g_browser_process->local_state();
ScopedDictPrefUpdate dict_update(local_state, dictionary_name());
const std::string app_key =
std::string(KioskAppDataBase::kKeyApps) + '.' + app_id_;
RemoveDictionaryPath(dict_update.Get(), app_key);
if (!icon_path_.empty()) {
base::ThreadPool::PostTask(
FROM_HERE, {base::MayBlock(), base::TaskPriority::BEST_EFFORT},
base::GetDeleteFileCallback(icon_path_));
}
}
} // namespace ash
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