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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "components/heavy_ad_intervention/heavy_ad_service.h"
#include "base/feature_list.h"
#include "base/files/file_path.h"
#include "base/memory/scoped_refptr.h"
#include "base/metrics/field_trial_params.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "base/time/default_clock.h"
#include "components/blocklist/opt_out_blocklist/sql/opt_out_store_sql.h"
#include "components/heavy_ad_intervention/heavy_ad_blocklist.h"
#include "components/heavy_ad_intervention/heavy_ad_features.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
namespace heavy_ad_intervention {
namespace {
const base::FilePath::CharType kHeavyAdInterventionOptOutDBFilename[] =
FILE_PATH_LITERAL("heavy_ad_intervention_opt_out.db");
} // namespace
// Whether an opt out store should be used or not.
bool HeavyAdOptOutStoreDisabled() {
return base::GetFieldTrialParamByFeatureAsBool(
features::kHeavyAdPrivacyMitigations, "OptOutStoreDisabled", false);
}
HeavyAdService::HeavyAdService() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}
HeavyAdService::~HeavyAdService() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
}
void HeavyAdService::Initialize(const base::FilePath& profile_path) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
DCHECK(!profile_path.empty());
if (!base::FeatureList::IsEnabled(features::kHeavyAdPrivacyMitigations))
return;
std::unique_ptr<blocklist::OptOutStoreSQL> opt_out_store;
if (!HeavyAdOptOutStoreDisabled()) {
// Get the background thread to run SQLite on.
scoped_refptr<base::SequencedTaskRunner> background_task_runner =
base::ThreadPool::CreateSequencedTaskRunner(
{base::MayBlock(), base::TaskPriority::BEST_EFFORT});
opt_out_store = std::make_unique<blocklist::OptOutStoreSQL>(
content::GetUIThreadTaskRunner({}), background_task_runner,
profile_path.Append(kHeavyAdInterventionOptOutDBFilename));
}
heavy_ad_blocklist_ = std::make_unique<HeavyAdBlocklist>(
std::move(opt_out_store), base::DefaultClock::GetInstance(), this);
}
void HeavyAdService::InitializeOffTheRecord() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
if (!base::FeatureList::IsEnabled(features::kHeavyAdPrivacyMitigations))
return;
// Providing a null out_out_store which sets up the blocklist in-memory only.
heavy_ad_blocklist_ = std::make_unique<HeavyAdBlocklist>(
nullptr /* opt_out_store */, base::DefaultClock::GetInstance(), this);
}
void HeavyAdService::NotifyOnBlocklistLoaded(
base::OnceClosure on_blocklist_loaded_callback) {
if (blocklist_is_loaded_) {
std::move(on_blocklist_loaded_callback).Run();
return;
}
on_blocklist_loaded_callback_ = std::move(on_blocklist_loaded_callback);
}
void HeavyAdService::NotifyOnBlocklistCleared(
base::OnceClosure on_blocklist_cleared_callback) {
on_blocklist_cleared_callback_ = std::move(on_blocklist_cleared_callback);
}
void HeavyAdService::OnLoadingStateChanged(bool is_loaded) {
blocklist_is_loaded_ = is_loaded;
if (blocklist_is_loaded_ && !on_blocklist_loaded_callback_.is_null())
std::move(on_blocklist_loaded_callback_).Run();
}
void HeavyAdService::OnBlocklistCleared(base::Time time) {
if (!on_blocklist_cleared_callback_.is_null())
std::move(on_blocklist_cleared_callback_).Run();
}
} // namespace heavy_ad_intervention
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