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// Copyright 2017 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/feature_engagement/internal/persistent_availability_store.h"
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "base/feature_list.h"
#include "base/functional/bind.h"
#include "base/functional/callback.h"
#include "base/logging.h"
#include "components/feature_engagement/internal/proto/availability.pb.h"
#include "components/feature_engagement/internal/stats.h"
#include "components/feature_engagement/public/feature_list.h"
#include "components/leveldb_proto/public/proto_database.h"
namespace feature_engagement {
namespace {
using KeyAvailabilityPair = std::pair<std::string, Availability>;
using KeyAvailabilityList = std::vector<KeyAvailabilityPair>;
void OnDBUpdateComplete(
std::unique_ptr<leveldb_proto::ProtoDatabase<Availability>> db,
PersistentAvailabilityStore::OnLoadedCallback on_loaded_callback,
std::unique_ptr<std::map<std::string, uint32_t>> feature_availabilities,
bool success) {
stats::RecordDbUpdate(success, stats::StoreType::AVAILABILITY_STORE);
std::move(on_loaded_callback).Run(success, std::move(feature_availabilities));
}
void OnDBLoadComplete(
std::unique_ptr<leveldb_proto::ProtoDatabase<Availability>> db,
FeatureVector feature_filter,
PersistentAvailabilityStore::OnLoadedCallback on_loaded_callback,
uint32_t current_day,
bool success,
std::unique_ptr<std::vector<Availability>> availabilities) {
stats::RecordAvailabilityDbLoadEvent(success);
if (!success) {
std::move(on_loaded_callback)
.Run(false, std::make_unique<std::map<std::string, uint32_t>>());
return;
}
// Create map from feature name to Feature.
std::map<std::string, const base::Feature*> feature_mapping;
for (const base::Feature* feature : feature_filter) {
DCHECK(feature_mapping.find(feature->name) == feature_mapping.end());
feature_mapping[feature->name] = feature;
}
// Find all availabilities from DB and find out what should be deleted.
auto feature_availabilities =
std::make_unique<std::map<std::string, uint32_t>>();
auto deletes = std::make_unique<std::vector<std::string>>();
for (auto& availability : *availabilities) {
// Check if in |feature_filter|.
if (feature_mapping.find(availability.feature_name()) ==
feature_mapping.end()) {
deletes->push_back(availability.feature_name());
continue;
}
// Check if enabled.
const base::Feature* feature = feature_mapping[availability.feature_name()];
if (!base::FeatureList::IsEnabled(*feature)) {
deletes->push_back(availability.feature_name());
continue;
}
// Both in |feature_filter| and is enabled, so keep around.
feature_availabilities->insert(
std::make_pair(feature->name, availability.day()));
DVLOG(2) << "Keeping availability for " << feature->name << " @ "
<< availability.day();
}
// Find features from |feature_filter| that are enabled, but not in DB yet.
auto additions = std::make_unique<KeyAvailabilityList>();
for (const base::Feature* feature : feature_filter) {
// Check if already in DB.
if (feature_availabilities->find(feature->name) !=
feature_availabilities->end())
continue;
// Check if enabled.
if (!base::FeatureList::IsEnabled(*feature))
continue;
// Both in feature filter, and is enabled, but not in DB, so add to DB.
Availability availability;
availability.set_feature_name(feature->name);
availability.set_day(current_day);
additions->push_back({feature->name, std::move(availability)});
// Since it will be written to the DB, also add to the callback result.
feature_availabilities->insert({feature->name, current_day});
DVLOG(2) << "Adding availability for " << feature->name << " @ "
<< current_day;
}
// Write all changes to the DB.
auto* db_ptr = db.get();
db_ptr->UpdateEntries(std::move(additions), std::move(deletes),
base::BindOnce(&OnDBUpdateComplete, std::move(db),
std::move(on_loaded_callback),
std::move(feature_availabilities)));
}
void OnDBInitComplete(
std::unique_ptr<leveldb_proto::ProtoDatabase<Availability>> db,
FeatureVector feature_filter,
PersistentAvailabilityStore::OnLoadedCallback on_loaded_callback,
uint32_t current_day,
leveldb_proto::Enums::InitStatus status) {
bool success = status == leveldb_proto::Enums::InitStatus::kOK;
stats::RecordDbInitEvent(success, stats::StoreType::AVAILABILITY_STORE);
if (!success) {
std::move(on_loaded_callback)
.Run(false, std::make_unique<std::map<std::string, uint32_t>>());
return;
}
auto* db_ptr = db.get();
db_ptr->LoadEntries(base::BindOnce(
&OnDBLoadComplete, std::move(db), std::move(feature_filter),
std::move(on_loaded_callback), current_day));
}
} // namespace
// static
void PersistentAvailabilityStore::LoadAndUpdateStore(
const base::FilePath& storage_dir,
std::unique_ptr<leveldb_proto::ProtoDatabase<Availability>> db,
FeatureVector feature_filter,
PersistentAvailabilityStore::OnLoadedCallback on_loaded_callback,
uint32_t current_day) {
auto* db_ptr = db.get();
db_ptr->Init(base::BindOnce(&OnDBInitComplete, std::move(db),
std::move(feature_filter),
std::move(on_loaded_callback), current_day));
}
} // namespace feature_engagement
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