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// Copyright 2017 The Chromium Authors. All rights reserved.
// 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/event_model_impl.h"
#include <map>
#include <memory>
#include <string>
#include <vector>
#include "base/bind.h"
#include "base/logging.h"
#include "base/memory/weak_ptr.h"
#include "base/sequenced_task_runner.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/feature_engagement/internal/event_model.h"
#include "components/feature_engagement/internal/event_storage_validator.h"
#include "components/feature_engagement/internal/event_store.h"
namespace feature_engagement {
EventModelImpl::EventModelImpl(
std::unique_ptr<EventStore> store,
std::unique_ptr<EventStorageValidator> storage_validator)
: store_(std::move(store)),
storage_validator_(std::move(storage_validator)),
ready_(false),
weak_factory_(this) {}
EventModelImpl::~EventModelImpl() = default;
void EventModelImpl::Initialize(const OnModelInitializationFinished& callback,
uint32_t current_day) {
store_->Load(base::Bind(&EventModelImpl::OnStoreLoaded,
weak_factory_.GetWeakPtr(), callback, current_day));
}
bool EventModelImpl::IsReady() const {
return ready_;
}
const Event* EventModelImpl::GetEvent(const std::string& event_name) const {
auto search = events_.find(event_name);
if (search == events_.end())
return nullptr;
return &search->second;
}
void EventModelImpl::IncrementEvent(const std::string& event_name,
uint32_t current_day) {
DCHECK(ready_);
if (!storage_validator_->ShouldStore(event_name)) {
DVLOG(2) << "Not incrementing event " << event_name << " @ " << current_day;
return;
}
DVLOG(2) << "Incrementing event " << event_name << " @ " << current_day;
Event& event = GetNonConstEvent(event_name);
for (int i = 0; i < event.events_size(); ++i) {
Event_Count* event_count = event.mutable_events(i);
DCHECK(event_count->has_day());
DCHECK(event_count->has_count());
if (event_count->day() == current_day) {
event_count->set_count(event_count->count() + 1);
store_->WriteEvent(event);
return;
}
}
// Day not found for event, adding new day with a count of 1.
Event_Count* event_count = event.add_events();
event_count->set_day(current_day);
event_count->set_count(1u);
store_->WriteEvent(event);
}
void EventModelImpl::OnStoreLoaded(
const OnModelInitializationFinished& callback,
uint32_t current_day,
bool success,
std::unique_ptr<std::vector<Event>> events) {
if (!success) {
callback.Run(false);
return;
}
for (auto& event : *events) {
DCHECK_NE("", event.name());
Event new_event;
for (const auto& event_count : event.events()) {
if (!storage_validator_->ShouldKeep(event.name(), event_count.day(),
current_day)) {
continue;
}
Event_Count* new_event_count = new_event.add_events();
new_event_count->set_day(event_count.day());
new_event_count->set_count(event_count.count());
}
// Only keep Event object that have days with activity.
if (new_event.events_size() > 0) {
new_event.set_name(event.name());
events_[event.name()] = new_event;
// If the number of events is not the same, overwrite DB entry.
if (new_event.events_size() != event.events_size())
store_->WriteEvent(new_event);
} else {
// If there are no more activity for an Event, delete the whole event.
store_->DeleteEvent(event.name());
}
}
ready_ = true;
callback.Run(true);
}
Event& EventModelImpl::GetNonConstEvent(const std::string& event_name) {
if (events_.find(event_name) == events_.end()) {
// Event does not exist yet, so create it.
events_[event_name].set_name(event_name);
store_->WriteEvent(events_[event_name]);
}
return events_[event_name];
}
} // namespace feature_engagement
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