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// Copyright 2025 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/multiple_event_model_provider.h"
#include "base/barrier_closure.h"
#include "base/functional/bind.h"
#include "components/feature_engagement/internal/event_model.h"
#include "components/feature_engagement/internal/event_model_reader.h"
#include "components/feature_engagement/internal/event_model_writer.h"
#include "components/feature_engagement/internal/multiple_event_model_writer.h"
namespace feature_engagement {
namespace {
const int kNumberOfEventModels = 2;
} // namespace
MultipleEventModelProvider::MultipleEventModelProvider(
std::unique_ptr<EventModel> profile_event_model,
std::unique_ptr<EventModel> device_event_model)
: profile_event_model_(std::move(profile_event_model)),
device_event_model_(std::move(device_event_model)),
multiple_event_model_writer_(std::make_unique<MultipleEventModelWriter>(
profile_event_model_.get(),
device_event_model_.get())) {}
MultipleEventModelProvider::~MultipleEventModelProvider() = default;
void MultipleEventModelProvider::Initialize(
OnModelInitializationFinished callback,
uint32_t current_day) {
// If a request is already in progress, drop the new request.
if (initialization_callback_) {
return;
}
// Set the callback to be invoked once overall initialization is complete.
initialization_callback_ = std::move(callback);
// Use a `BarrierClosure` to ensure all async tasks are completed before
// executing the overall completion callback and returning the data. The
// BarrierClosure will wait until the `OnInitializationComplete` callback
// is itself run `kNumberOfEventModels` times.
initialization_complete_barrier_ = base::BarrierClosure(
kNumberOfEventModels,
base::BindOnce(
&MultipleEventModelProvider::EventModelsInitializationCompleted,
weak_ptr_factory_.GetWeakPtr()));
// Initialize to true. The overall success is the AND of all individual model
// initializations. If any of them fail, this will become false.
initialization_success_ = true;
profile_event_model_->Initialize(
base::BindOnce(&MultipleEventModelProvider::OnInitializationComplete,
weak_ptr_factory_.GetWeakPtr()),
current_day);
device_event_model_->Initialize(
base::BindOnce(&MultipleEventModelProvider::OnInitializationComplete,
weak_ptr_factory_.GetWeakPtr()),
current_day);
}
bool MultipleEventModelProvider::IsReady() const {
return profile_event_model_->IsReady() && device_event_model_->IsReady();
}
const EventModelReader*
MultipleEventModelProvider::GetEventModelReaderForFeature(
const FeatureConfig& feature_config) const {
if (feature_config.storage_type == StorageType::PROFILE) {
return profile_event_model_.get();
}
return device_event_model_.get();
}
EventModelWriter* MultipleEventModelProvider::GetEventModelWriter() {
return multiple_event_model_writer_.get();
}
void MultipleEventModelProvider::OnInitializationComplete(bool success) {
// If any of the storage types fail to initialize, the overall initialization
// will fail.
initialization_success_ = initialization_success_ && success;
// The `BarrierClosure` must be run regardless of the error type to ensure
// that it is run `kNumberOfEventModels` times before the
// `EventModelsInitializationCompleted` callback can be run.
initialization_complete_barrier_.Run();
}
void MultipleEventModelProvider::EventModelsInitializationCompleted() {
std::move(initialization_callback_).Run(initialization_success_);
}
} // namespace feature_engagement
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