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// 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 "chrome/browser/segmentation_platform/client_util/tab_data_collection_util.h"
#include "base/memory/raw_ptr.h"
#include "base/metrics/user_metrics.h"
#include "base/scoped_observation.h"
#include "chrome/browser/android/tab_android.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list.h"
#include "chrome/browser/ui/android/tab_model/tab_model_list_observer.h"
#include "chrome/browser/ui/android/tab_model/tab_model_observer.h"
#include "components/segmentation_platform/embedder/input_delegate/tab_rank_dispatcher.h"
#include "components/segmentation_platform/embedder/tab_fetcher.h"
#include "components/segmentation_platform/public/constants.h"
#include "components/segmentation_platform/public/segmentation_platform_service.h"
namespace segmentation_platform {
class TabDataCollectionUtil::LocalTabModelObserver : public TabModelObserver {
public:
explicit LocalTabModelObserver(TabDataCollectionUtil* collection_util)
: collection_util_(collection_util) {}
~LocalTabModelObserver() override = default;
void DidSelectTab(TabAndroid* tab, TabModel::TabSelectionType type) override {
collection_util_->OnTabAction(tab, TabAction::kTabSelected);
}
void TabPendingClosure(TabAndroid* tab) override {
collection_util_->OnTabAction(tab, TabAction::kTabClose);
}
void AllTabsPendingClosure(
const std::vector<raw_ptr<TabAndroid, VectorExperimental>>& tabs)
override {
for (const TabAndroid* tab : tabs) {
collection_util_->OnTabAction(tab, TabAction::kTabClose);
}
}
private:
const raw_ptr<TabDataCollectionUtil> collection_util_;
};
class TabDataCollectionUtil::LocalTabModelListObserver
: public TabModelListObserver {
public:
LocalTabModelListObserver(LocalTabModelObserver* tab_observer,
TabDataCollectionUtil* collection_util)
: tab_observer_(tab_observer), collection_util_(collection_util) {
ResetObservers();
}
~LocalTabModelListObserver() override = default;
void OnTabModelAdded(TabModel* tab_model) override { ResetObservers(); }
void OnTabModelRemoved(TabModel* tab_model) override { ResetObservers(); }
void ResetObservers() {
observing_models_.clear();
for (TabModel* model : TabModelList::models()) {
observing_models_.emplace_back(
std::make_unique<TabModelObservation>(tab_observer_.get()));
observing_models_.back()->Observe(model);
}
}
private:
using TabModelObservation =
base::ScopedObservation<TabModel, TabModelObserver>;
const raw_ptr<LocalTabModelObserver> tab_observer_;
const raw_ptr<TabDataCollectionUtil> collection_util_;
std::vector<std::unique_ptr<TabModelObservation>> observing_models_;
};
TabDataCollectionUtil::TabDataCollectionUtil(
SegmentationPlatformService* segmentation_service,
TabRankDispatcher* tab_rank_dispatcher)
: segmentation_service_(segmentation_service),
tab_rank_dispatcher_(tab_rank_dispatcher),
tab_observer_(std::make_unique<LocalTabModelObserver>(this)),
tab_model_list_observer_(
std::make_unique<LocalTabModelListObserver>(tab_observer_.get(),
this)) {
TabModelList::AddObserver(tab_model_list_observer_.get());
base::AddActionCallback(base::BindRepeating(
&TabDataCollectionUtil::OnUserAction, weak_ptr_factory_.GetWeakPtr()));
}
TabDataCollectionUtil::~TabDataCollectionUtil() {
TabModelList::RemoveObserver(tab_model_list_observer_.get());
}
void TabDataCollectionUtil::OnTabAction(const TabAndroid* tab,
TabAction tab_action) {
auto it = tab_requests_.find(tab);
if (it != tab_requests_.end()) {
TrainingLabels labels;
labels.output_metric =
std::make_pair("TabAction", static_cast<int>(tab_action));
segmentation_service_->CollectTrainingData(
proto::SegmentId::TAB_RESUMPTION_CLASSIFIER, it->second, labels,
base::DoNothing());
}
}
void TabDataCollectionUtil::OnUserAction(const std::string& action,
base::TimeTicks time) {
if (action != "MobileToolbarShowStackView") {
return;
}
// Filter only local tabs, with TabAndroid object usable.
auto filter = base::BindRepeating(
[](const TabFetcher::Tab& tab) { return !!tab.tab_android; });
tab_rank_dispatcher_->GetTopRankedTabs(
kTabResumptionClassifierKey, TabRankDispatcher::TabFilter(),
base::BindOnce(&TabDataCollectionUtil::OnGetRankedTabs,
weak_ptr_factory_.GetWeakPtr()));
}
void TabDataCollectionUtil::OnGetRankedTabs(
bool success,
std::multiset<TabRankDispatcher::RankedTab> ranked_tabs) {
if (!success) {
return;
}
tab_requests_.clear();
auto* fetcher = tab_rank_dispatcher_->tab_fetcher();
for (const auto& candidate : ranked_tabs) {
auto tab = fetcher->FindTab(candidate.tab);
if (tab.tab_android) {
tab_requests_[tab.tab_android] = candidate.request_id;
}
}
}
} // namespace segmentation_platform
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