breadcrumb_persistent_storage_manager.cc

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "components/breadcrumbs/core/breadcrumb_persistent_storage_manager.h"

#include <string.h>

#include <string>

#include "base/containers/adapters.h"
#include "base/files/file_util.h"
#include "base/files/memory_mapped_file.h"
#include "base/functional/bind.h"
#include "base/strings/string_split.h"
#include "base/strings/string_util.h"
#include "base/task/sequenced_task_runner.h"
#include "base/task/thread_pool.h"
#include "components/breadcrumbs/core/breadcrumb_manager.h"
#include "components/breadcrumbs/core/breadcrumb_persistent_storage_util.h"

namespace breadcrumbs {

namespace {

const char kEventSeparator[] = …;

// Minimum time between breadcrumb writes to disk.
constexpr auto kMinDelayBetweenWrites = …;

// Writes the given |events| to |file_path| at |position|. If |append| is false,
// the existing file will be overwritten.
void DoWriteEventsToFile(const base::FilePath& file_path,
                         const size_t position,
                         const std::string& events,
                         const bool append) { … }

// Returns breadcrumb events stored at |file_path|.
std::string DoGetStoredEvents(const base::FilePath& file_path) { … }

// Returns a newline-delimited string containing all breadcrumbs held by the
// BreadcrumbManager. The oldest breadcrumbs are truncated from the string if it
// would be longer than `kMaxDataLength`.
std::string GetEvents() { … }

}  // namespace

BreadcrumbPersistentStorageManager::BreadcrumbPersistentStorageManager(
    const base::FilePath& directory,
    base::RepeatingCallback<bool()> is_metrics_enabled_callback,
    base::OnceClosure initialization_done_callback)
    : … { … }

BreadcrumbPersistentStorageManager::~BreadcrumbPersistentStorageManager() =
    default;

void BreadcrumbPersistentStorageManager::Initialize(
    base::OnceClosure initialization_done_callback,
    const std::string& previous_session_events) { … }

void BreadcrumbPersistentStorageManager::Write(const std::string& events,
                                               bool append) { … }

void BreadcrumbPersistentStorageManager::EventAdded(const std::string& event) { … }

bool BreadcrumbPersistentStorageManager::CheckForFileConsent() { … }

void BreadcrumbPersistentStorageManager::WriteEvents(
    base::OnceClosure done_callback) { … }

}  // namespace breadcrumbs
chromium/components/breadcrumbs/core/breadcrumb_persistent_storage_manager.cc
