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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 "components/segmentation_platform/embedder/input_delegate/tab_session_source.h"
#include <math.h>
#include "base/memory/raw_ptr.h"
#include "base/time/time.h"
#include "components/segmentation_platform/embedder/tab_fetcher.h"
#include "components/segmentation_platform/internal/execution/processing/feature_processor_state.h"
#include "components/segmentation_platform/public/types/processed_value.h"
#include "components/sessions/core/session_id.h"
#include "components/sessions/core/session_types.h"
#include "components/sync_sessions/open_tabs_ui_delegate.h"
#include "components/sync_sessions/synced_session.h"
#include "ui/base/page_transition_types.h"
namespace segmentation_platform::processing {
float TabSessionSource::BucketizeExp(int64_t value, int max_buckets) {
if (value <= 0) {
return 0;
}
int log_val = floor(log2(value));
if (log_val >= max_buckets) {
log_val = max_buckets;
}
return pow(2, log_val);
}
float TabSessionSource::BucketizeLinear(int64_t value, int max_buckets) {
if (value <= 0) {
return 0;
}
if (value >= max_buckets) {
return max_buckets;
}
return value;
}
TabSessionSource::TabSessionSource(
sync_sessions::SessionSyncService* session_sync_service,
TabFetcher* tab_fetcher)
: session_sync_service_(session_sync_service), tab_fetcher_(tab_fetcher) {}
TabSessionSource::~TabSessionSource() = default;
void TabSessionSource::Process(const proto::CustomInput& input,
FeatureProcessorState& feature_processor_state,
ProcessedCallback callback) {
auto tab_id_val =
feature_processor_state.input_context()->GetMetadataArgument("tab_id");
auto session_tag_val =
feature_processor_state.input_context()->GetMetadataArgument(
"session_tag");
if (!session_tag_val || !tab_id_val) {
std::move(callback).Run(/*error=*/true, {});
return;
}
CHECK_EQ(tab_id_val->type, ProcessedValue::Type::INT);
CHECK_EQ(session_tag_val->type, ProcessedValue::STRING);
SessionID::id_type tab_id = tab_id_val->int_val;
std::string session_tag = session_tag_val->str_val;
Tensor inputs(kNumInputs, ProcessedValue(0.0f));
TabFetcher::Tab tab = tab_fetcher_->FindTab(TabFetcher::TabEntry(
SessionID::FromSerializedValue(tab_id), session_tag));
if (tab.session_tab) {
AddTabInfo(tab.session_tab, inputs);
AddTabRanks(session_tag, tab.session_tab, inputs);
}
if (tab.webcontents || tab.tab_android) {
AddLocalTabInfo(tab, feature_processor_state, inputs);
}
std::move(callback).Run(false, std::move(inputs));
}
void TabSessionSource::AddTabInfo(const sessions::SessionTab* session_tab,
Tensor& inputs) {
base::TimeDelta time_since_modified =
base::Time::Now() - session_tab->timestamp;
// The navigation index could be invalid if it is larger than the navigation
// list, so pick the index when available, else pick the last navigation
// available.
int navigation_index =
static_cast<size_t>(session_tab->current_navigation_index) >=
session_tab->navigations.size()
? session_tab->navigations.size() - 1
: session_tab->current_navigation_index;
base::TimeDelta time_since_last_nav;
base::TimeDelta time_since_first_nav;
ui::PageTransition last_transition = ui::PAGE_TRANSITION_TYPED;
if (session_tab->navigations.size() > 0) {
const auto& current_navigation = session_tab->navigations[navigation_index];
time_since_last_nav = base::Time::Now() - current_navigation.timestamp();
time_since_first_nav =
base::Time::Now() - session_tab->navigations[0].timestamp();
last_transition = current_navigation.transition_type();
}
inputs[kInputTimeSinceModifiedSec] = ProcessedValue::FromFloat(
BucketizeExp(time_since_modified.InSeconds(), /*max_buckets*/50));
inputs[kInputTimeSinceLastNavSec] = ProcessedValue::FromFloat(
BucketizeExp(time_since_last_nav.InSeconds(), /*max_buckets*/50));
inputs[kInputTimeSinceFirstNavSec] = ProcessedValue::FromFloat(
BucketizeExp(time_since_first_nav.InSeconds(), /*max_buckets*/50));
inputs[kInputLastTransitionType] = ProcessedValue::FromFloat(last_transition);
// Removed 06/2024.
inputs[kInputPasswordFieldCount] = ProcessedValue(-1);
}
void TabSessionSource::AddTabRanks(const std::string& session_tag,
const sessions::SessionTab* session_tab,
Tensor& inputs) {
sync_sessions::OpenTabsUIDelegate* open_tab_delegate =
session_sync_service_->GetOpenTabsUIDelegate();
int tab_rank_in_session = 0;
std::vector<const sessions::SessionWindow*> windows =
open_tab_delegate->GetForeignSession(session_tag);
for (const auto* window : windows) {
for (const auto& tab : window->tabs) {
if (tab->timestamp > session_tab->timestamp) {
tab_rank_in_session++;
}
}
}
std::vector<raw_ptr<const sync_sessions::SyncedSession, VectorExperimental>>
sessions;
int session_rank_overall = 0;
if (open_tab_delegate->GetAllForeignSessions(&sessions)) {
for (const sync_sessions::SyncedSession* session : sessions) {
if (session->GetModifiedTime() > session_tab->timestamp) {
session_rank_overall++;
}
}
}
inputs[kInputTabRankInSession] =
ProcessedValue::FromFloat(BucketizeLinear(tab_rank_in_session, /*max_buckets*/10));
inputs[kInputSessionRank] =
ProcessedValue::FromFloat(BucketizeLinear(session_rank_overall, /*max_buckets*/10));
}
void TabSessionSource::AddLocalTabInfo(
const TabFetcher::Tab& tab,
FeatureProcessorState& feature_processor_state,
Tensor& inputs) {}
} // namespace segmentation_platform::processing
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