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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/breadcrumbs/core/breadcrumb_manager.h"
#include "base/containers/adapters.h"
#include "base/containers/circular_deque.h"
#include "base/format_macros.h"
#include "base/observer_list.h"
#include "base/strings/stringprintf.h"
#include "components/breadcrumbs/core/breadcrumb_manager_observer.h"
#include "components/breadcrumbs/core/crash_reporter_breadcrumb_constants.h"
namespace breadcrumbs {
const size_t kMaxBreadcrumbs = 30;
// static
BreadcrumbManager& BreadcrumbManager::GetInstance() {
static base::NoDestructor<BreadcrumbManager> breadcrumb_manager;
return *breadcrumb_manager;
}
const base::circular_deque<std::string>& BreadcrumbManager::GetEvents() {
return breadcrumbs_;
}
void BreadcrumbManager::AddEvent(const std::string& event) {
DCHECK_EQ(std::string::npos, event.find('\n'));
const base::TimeDelta elapsed_time = GetElapsedTime();
// Prepend a timestamp containing elapsed time in H:MM:SS format. This is
// preferred over base::TimeDurationWithSeconds() and wall-clock time to
// avoid revealing client language or time zone.
const int64_t total_seconds = elapsed_time.InSeconds();
const int64_t hours = total_seconds / base::Time::kSecondsPerHour;
const int64_t minutes = (total_seconds / base::Time::kSecondsPerMinute) %
base::Time::kMinutesPerHour;
const int64_t seconds = total_seconds % base::Time::kSecondsPerMinute;
const std::string event_with_timestamp =
base::StringPrintf("%" PRIu64 ":%02" PRIu64 ":%02" PRIu64 " %s", hours,
minutes, seconds, event.c_str());
if (breadcrumbs_.size() == kMaxBreadcrumbs)
breadcrumbs_.pop_front();
breadcrumbs_.push_back(event_with_timestamp);
for (auto& observer : observers_) {
observer.EventAdded(event_with_timestamp);
}
}
void BreadcrumbManager::SetPreviousSessionEvents(
const std::vector<std::string>& events) {
// Insert `events` into the event log, skipping the oldest events (which are
// at the front) if needed to keep the event log below `kMaxBreadcrumbs`.
const size_t breadcrumbs_capacity = kMaxBreadcrumbs - breadcrumbs_.size();
const size_t breadcrumbs_to_insert =
std::min(events.size(), breadcrumbs_capacity);
breadcrumbs_.insert(breadcrumbs_.begin(),
events.end() - breadcrumbs_to_insert, events.end());
for (auto& observer : observers_) {
observer.PreviousSessionEventsAdded();
}
}
BreadcrumbManager::BreadcrumbManager() = default;
BreadcrumbManager::~BreadcrumbManager() = default;
base::TimeDelta BreadcrumbManager::GetElapsedTime() {
return base::TimeTicks::Now() - start_time_;
}
void BreadcrumbManager::AddObserver(BreadcrumbManagerObserver* observer) {
observers_.AddObserver(observer);
}
void BreadcrumbManager::RemoveObserver(BreadcrumbManagerObserver* observer) {
observers_.RemoveObserver(observer);
}
void BreadcrumbManager::ResetForTesting() {
start_time_ = base::TimeTicks::Now();
breadcrumbs_.clear();
}
} // namespace breadcrumbs
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