OpenHarmony-v4.1-Release/s

/*
 * Copyright (c) 2022 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <thread>
#include <unordered_set>

#include "hitrace.h"
#include "distributed_object_impl.h"
#include "distributed_objectstore_impl.h"
#include "objectstore_errors.h"
#include "softbus_adapter.h"
#include "string_utils.h"
#include "asset_change_timer.h"

namespace OHOS::ObjectStore {
DistributedObjectStoreImpl::DistributedObjectStoreImpl(FlatObjectStore *flatObjectStore)
    : flatObjectStore_(flatObjectStore)
{
}

DistributedObjectStoreImpl::~DistributedObjectStoreImpl()
{
    delete flatObjectStore_;
}

DistributedObject *DistributedObjectStoreImpl::CacheObject(
    const std::string &sessionId, FlatObjectStore *flatObjectStore)
{
    DistributedObjectImpl *object = new (std::nothrow) DistributedObjectImpl(sessionId, flatObjectStore);
    if (object == nullptr) {
        return nullptr;
    }
    std::unique_lock<std::shared_mutex> cacheLock(dataMutex_);
    objects_.push_back(object);
    return object;
}

void DistributedObjectStoreImpl::RemoveCacheObject(const std::string &sessionId)
{
    std::unique_lock<std::shared_mutex> cacheLock(dataMutex_);
    auto iter = objects_.begin();
    while (iter != objects_.end()) {
        if ((*iter)->GetSessionId() == sessionId) {
            delete *iter;
            iter = objects_.erase(iter);
        } else {
            iter++;
        }
    }
    return;
}

DistributedObject *DistributedObjectStoreImpl::CreateObject(const std::string &sessionId)
{
    DataObjectHiTrace trace("DistributedObjectStoreImpl::CreateObject");
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject store not opened!");
        return nullptr;
    }

    if (sessionId.empty()) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject Invalid sessionId");
        return nullptr;
    }

    uint32_t status = flatObjectStore_->CreateObject(sessionId);
    if (status != SUCCESS) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject CreateTable err %{public}d", status);
        return nullptr;
    }
    return CacheObject(sessionId, flatObjectStore_);
}

DistributedObject *DistributedObjectStoreImpl::CreateObject(const std::string &sessionId, uint32_t &status)
{
    DataObjectHiTrace trace("DistributedObjectStoreImpl::CreateObject");
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject store not opened!");
        status = ERR_NULL_OBJECTSTORE;
        return nullptr;
    }

    if (sessionId.empty()) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject Invalid sessionId");
        status = ERR_INVALID_ARGS;
        return nullptr;
    }

    status = flatObjectStore_->CreateObject(sessionId);
    if (status != SUCCESS) {
        LOG_ERROR("DistributedObjectStoreImpl::CreateObject CreateTable err %{public}d", status);
        return nullptr;
    }
    return CacheObject(sessionId, flatObjectStore_);
}

uint32_t DistributedObjectStoreImpl::DeleteObject(const std::string &sessionId)
{
    DataObjectHiTrace trace("DistributedObjectStoreImpl::DeleteObject");
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECTSTORE;
    }
    uint32_t status = flatObjectStore_->Delete(sessionId);
    if (status != SUCCESS) {
        LOG_ERROR("DistributedObjectStoreImpl::DeleteObject store delete err %{public}d", status);
        return status;
    }
    RemoveCacheObject(sessionId);
    return SUCCESS;
}

uint32_t DistributedObjectStoreImpl::Get(const std::string &sessionId, DistributedObject **object)
{
    auto iter = objects_.begin();
    while (iter != objects_.end()) {
        if ((*iter)->GetSessionId() == sessionId) {
            *object = *iter;
            return SUCCESS;
        }
        iter++;
    }
    LOG_ERROR("DistributedObjectStoreImpl::Get object err, no object");
    return ERR_GET_OBJECT;
}

uint32_t DistributedObjectStoreImpl::Watch(DistributedObject *object, std::shared_ptr<ObjectWatcher> watcher)
{
    if (object == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECT;
    }
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECTSTORE;
    }
    std::lock_guard<std::mutex> lock(watchersLock_);
    if (watchers_.count(object) != 0) {
        LOG_ERROR("DistributedObjectStoreImpl::Watch already gets object");
        return ERR_EXIST;
    }
    std::shared_ptr<WatcherProxy> watcherProxy = std::make_shared<WatcherProxy>(watcher, object->GetSessionId());
    watcherProxy->SetAssetChangeCallBack(
        [=](const std::string &sessionId, const std::string &assetKey, std::shared_ptr<ObjectWatcher> objectWatcher) {
            AssetChangeTimer *assetChangeTimer = AssetChangeTimer::GetInstance(flatObjectStore_);
            assetChangeTimer->OnAssetChanged(sessionId, assetKey, objectWatcher);
        });
    uint32_t status = flatObjectStore_->Watch(object->GetSessionId(), watcherProxy);
    if (status != SUCCESS) {
        LOG_ERROR("DistributedObjectStoreImpl::Watch failed %{public}d", status);
        return status;
    }
    watchers_.insert_or_assign(object, watcherProxy);
    LOG_INFO("DistributedObjectStoreImpl:Watch object success.");
    return SUCCESS;
}

uint32_t DistributedObjectStoreImpl::UnWatch(DistributedObject *object)
{
    if (object == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECT;
    }
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECTSTORE;
    }
    uint32_t status = flatObjectStore_->UnWatch(object->GetSessionId());
    if (status != SUCCESS) {
        LOG_ERROR("DistributedObjectStoreImpl::Watch failed %{public}d", status);
        return status;
    }
    std::lock_guard<std::mutex> lock(watchersLock_);
    watchers_.erase(object);
    LOG_INFO("DistributedObjectStoreImpl:UnWatch object success.");
    return SUCCESS;
}

uint32_t DistributedObjectStoreImpl::SetStatusNotifier(std::shared_ptr<StatusNotifier> notifier)
{
    if (flatObjectStore_ == nullptr) {
        LOG_ERROR("DistributedObjectStoreImpl::Sync object err ");
        return ERR_NULL_OBJECTSTORE;
    }
    std::shared_ptr<StatusNotifierProxy> watcherProxy = std::make_shared<StatusNotifierProxy>(notifier);
    return flatObjectStore_->SetStatusNotifier(watcherProxy);
}

void DistributedObjectStoreImpl::NotifyCachedStatus(const std::string &sessionId)
{
    flatObjectStore_->CheckRetrieveCache(sessionId);
}

WatcherProxy::WatcherProxy(const std::shared_ptr<ObjectWatcher> objectWatcher, const std::string &sessionId)
    : FlatObjectWatcher(sessionId), objectWatcher_(objectWatcher)
{
}

void WatcherProxy::OnChanged(
    const std::string &sessionId, const std::vector<std::string> &changedData, bool enableTransfer)
{
    std::unordered_set<std::string> transferKeys;
    std::vector<std::string> otherKeys;
    for (const auto &str : changedData) {
        if (!enableTransfer || str.find(ASSET_DOT) == std::string::npos) {
            if (str != DEVICEID_KEY) {
                otherKeys.push_back(str);
            }
        } else {
            std::string assetKey;
            if (FindChangedAssetKey(str, assetKey)) {
                transferKeys.insert(assetKey);
            }
        }
    }
    if (!otherKeys.empty()) {
        objectWatcher_->OnChanged(sessionId, otherKeys);
    }
    if (assetChangeCallback_ != nullptr && !transferKeys.empty()) {
        for (auto &assetKey : transferKeys) {
            assetChangeCallback_(sessionId, assetKey, objectWatcher_);
        }
    }
}

bool WatcherProxy::FindChangedAssetKey(const std::string &changedKey, std::string &assetKey)
{
    std::size_t dotPos = changedKey.find(ASSET_DOT);
    if ((changedKey.size() > MODIFY_TIME_SUFFIX.length() && changedKey.substr(dotPos) == MODIFY_TIME_SUFFIX) ||
            (changedKey.size() > SIZE_SUFFIX.length() && changedKey.substr(dotPos) == SIZE_SUFFIX)) {
        assetKey = changedKey.substr(0, dotPos);
        return true;
    }
    return false;
}

void WatcherProxy::SetAssetChangeCallBack(const AssetChangeCallback &assetChangeCallback)
{
    assetChangeCallback_ = assetChangeCallback;
}

DistributedObjectStore *DistributedObjectStore::GetInstance(const std::string &bundleName)
{
    static std::mutex instLock_;
    static DistributedObjectStore *instPtr = nullptr;
    if (instPtr == nullptr) {
        std::lock_guard<std::mutex> lock(instLock_);
        if (instPtr == nullptr && !bundleName.empty()) {
            LOG_INFO("new objectstore %{public}s", bundleName.c_str());
            FlatObjectStore *flatObjectStore = new (std::nothrow) FlatObjectStore(bundleName);
            if (flatObjectStore == nullptr) {
                LOG_ERROR("no memory for FlatObjectStore malloc!");
                return nullptr;
            }
            // Use instMemory to make sure this singleton not free before other object.
            // This operation needn't to malloc memory, we needn't to check nullptr.
            instPtr = new (std::nothrow) DistributedObjectStoreImpl(flatObjectStore);
            if (instPtr == nullptr) {
                delete flatObjectStore;
                LOG_ERROR("no memory for DistributedObjectStoreImpl malloc!");
                return nullptr;
            }
        }
    }
    return instPtr;
}

void StatusNotifierProxy::OnChanged(
    const std::string &sessionId, const std::string &networkId, const std::string &onlineStatus)
{
    if (notifier != nullptr) {
        notifier->OnChanged(sessionId, networkId, onlineStatus);
    }
}

StatusNotifierProxy::StatusNotifierProxy(const std::shared_ptr<StatusNotifier> &notifier) : notifier(notifier)
{
}

StatusNotifierProxy::~StatusNotifierProxy()
{
    LOG_ERROR("destroy");
    notifier = nullptr;
}
} // namespace OHOS::ObjectStore