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// Copyright 2016 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/offline_pages/core/background/request_queue_in_memory_store.h"
#include <unordered_set>
#include <utility>
#include "base/bind.h"
#include "base/location.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/offline_pages/core/background/save_page_request.h"
namespace offline_pages {
RequestQueueInMemoryStore::RequestQueueInMemoryStore()
: state_(StoreState::NOT_LOADED), scenario_(TestScenario::SUCCESSFUL) {}
RequestQueueInMemoryStore::RequestQueueInMemoryStore(TestScenario scenario)
: state_(StoreState::NOT_LOADED), scenario_(scenario) {}
RequestQueueInMemoryStore::~RequestQueueInMemoryStore() {}
void RequestQueueInMemoryStore::Initialize(const InitializeCallback& callback) {
if (scenario_ == TestScenario::SUCCESSFUL)
state_ = StoreState::LOADED;
else
state_ = StoreState::FAILED_LOADING;
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(callback, state_ == StoreState::LOADED));
}
void RequestQueueInMemoryStore::GetRequests(
const GetRequestsCallback& callback) {
DCHECK_NE(state_, StoreState::NOT_LOADED);
std::vector<std::unique_ptr<SavePageRequest>> result_requests;
for (const auto& id_request_pair : requests_) {
std::unique_ptr<SavePageRequest> request(
new SavePageRequest(id_request_pair.second));
result_requests.push_back(std::move(request));
}
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, true, std::move(result_requests)));
}
void RequestQueueInMemoryStore::GetRequestsByIds(
const std::vector<int64_t>& request_ids,
const UpdateCallback& callback) {
DCHECK_NE(state_, StoreState::NOT_LOADED);
std::unique_ptr<UpdateRequestsResult> result(
new UpdateRequestsResult(state()));
ItemActionStatus status;
// Make sure not to include the same request multiple times, while preserving
// the order of non-duplicated IDs in the result.
std::unordered_set<int64_t> processed_ids;
for (const auto& request_id : request_ids) {
if (!processed_ids.insert(request_id).second)
continue;
RequestsMap::iterator iter = requests_.find(request_id);
if (iter != requests_.end()) {
status = ItemActionStatus::SUCCESS;
result->updated_items.push_back(iter->second);
} else {
status = ItemActionStatus::NOT_FOUND;
}
result->item_statuses.push_back(std::make_pair(request_id, status));
}
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, std::move(result)));
}
void RequestQueueInMemoryStore::AddRequest(const SavePageRequest& request,
const AddCallback& callback) {
DCHECK_NE(state_, StoreState::NOT_LOADED);
RequestsMap::iterator iter = requests_.find(request.request_id());
ItemActionStatus status;
if (iter == requests_.end()) {
requests_.insert(iter, std::make_pair(request.request_id(), request));
status = ItemActionStatus::SUCCESS;
} else {
status = ItemActionStatus::ALREADY_EXISTS;
}
base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
base::Bind(callback, status));
}
void RequestQueueInMemoryStore::UpdateRequests(
const std::vector<SavePageRequest>& requests,
const RequestQueue::UpdateCallback& callback) {
DCHECK_NE(state_, StoreState::NOT_LOADED);
std::unique_ptr<UpdateRequestsResult> result(
new UpdateRequestsResult(state()));
ItemActionStatus status;
for (const auto& request : requests) {
RequestsMap::iterator iter = requests_.find(request.request_id());
if (iter != requests_.end()) {
status = ItemActionStatus::SUCCESS;
iter->second = request;
result->updated_items.push_back(request);
} else {
status = ItemActionStatus::NOT_FOUND;
}
result->item_statuses.push_back(
std::make_pair(request.request_id(), status));
}
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, std::move(result)));
}
void RequestQueueInMemoryStore::RemoveRequests(
const std::vector<int64_t>& request_ids,
const UpdateCallback& callback) {
DCHECK_NE(state_, StoreState::NOT_LOADED);
std::unique_ptr<UpdateRequestsResult> result(
new UpdateRequestsResult(StoreState::LOADED));
ItemActionStatus status;
// If we find a request, mark it as succeeded, and put it in the request list.
// Otherwise mark it as failed.
for (auto request_id : request_ids) {
RequestsMap::iterator iter = requests_.find(request_id);
if (iter != requests_.end()) {
status = ItemActionStatus::SUCCESS;
result->updated_items.push_back(iter->second);
requests_.erase(iter);
} else {
status = ItemActionStatus::NOT_FOUND;
}
result->item_statuses.push_back(std::make_pair(request_id, status));
}
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::BindOnce(callback, std::move(result)));
}
void RequestQueueInMemoryStore::Reset(const ResetCallback& callback) {
if (scenario_ != TestScenario::LOAD_FAILED_RESET_FAILED) {
requests_.clear();
state_ = StoreState::NOT_LOADED;
scenario_ = TestScenario::SUCCESSFUL;
} else {
state_ = StoreState::FAILED_RESET;
}
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, base::Bind(callback, state_ == StoreState::NOT_LOADED));
}
StoreState RequestQueueInMemoryStore::state() const {
return state_;
}
} // namespace offline_pages
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