storage.cpp

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 * file distributed with this source distribution.
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 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
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#include "backends/cloud/storage.h"
#include "backends/cloud/downloadrequest.h"
#include "backends/cloud/folderdownloadrequest.h"
#include "backends/cloud/savessyncrequest.h"
#include "backends/networking/curl/connectionmanager.h"
#include "common/debug.h"
#include "common/file.h"
#include <common/translation.h>
#include "common/osd_message_queue.h"

namespace Cloud {

Storage::Storage():
    _runningRequestsCount(0), _savesSyncRequest(nullptr), _syncRestartRequestsed(false),
    _downloadFolderRequest(nullptr) {}

Storage::~Storage() {}

Networking::ErrorCallback Storage::getErrorPrintingCallback() {
    return new Common::Callback<Storage, Networking::ErrorResponse>(this, &Storage::printErrorResponse);
}

void Storage::printErrorResponse(Networking::ErrorResponse error) {
    debug(9, "Storage: error response (%s, %ld):", (error.failed ? "failed" : "interrupted"), error.httpResponseCode);
    debug(9, "%s", error.response.c_str());
}

Networking::Request *Storage::addRequest(Networking::Request *request) {
    _runningRequestsMutex.lock();
    ++_runningRequestsCount;
    if (_runningRequestsCount == 1)
        debug(9, "Storage is working now");
    _runningRequestsMutex.unlock();
    return ConnMan.addRequest(request, new Common::Callback<Storage, Networking::Request *>(this, &Storage::requestFinishedCallback));
}

void Storage::requestFinishedCallback(Networking::Request *invalidRequestPointer) {
    bool restartSync = false;

    _runningRequestsMutex.lock();
    if (invalidRequestPointer == _savesSyncRequest)
        _savesSyncRequest = nullptr;
    --_runningRequestsCount;
    if (_syncRestartRequestsed)
        restartSync = true;
    if (_runningRequestsCount == 0 && !restartSync)
        debug(9, "Storage is not working now");
    _runningRequestsMutex.unlock();

    if (restartSync)
        syncSaves(nullptr, nullptr);
}

Networking::Request *Storage::upload(Common::String remotePath, Common::String localPath, UploadCallback callback, Networking::ErrorCallback errorCallback) {
    if (!errorCallback) errorCallback = getErrorPrintingCallback();

    Common::File *f = new Common::File();
    if (!f->open(localPath)) {
        warning("Storage: unable to open file to upload from");
        if (errorCallback)
            (*errorCallback)(Networking::ErrorResponse(nullptr, false, true, "", -1));
        delete errorCallback;
        delete callback;
        delete f;
        return nullptr;
    }

    return upload(remotePath, f, callback, errorCallback);
}

bool Storage::uploadStreamSupported() {
    return true;
}

Networking::Request *Storage::streamFile(Common::String path, Networking::NetworkReadStreamCallback callback, Networking::ErrorCallback errorCallback) {
    //most Storages use paths instead of ids, so this should work
    return streamFileById(path, callback, errorCallback);
}

Networking::Request *Storage::download(Common::String remotePath, Common::String localPath, BoolCallback callback, Networking::ErrorCallback errorCallback) {
    //most Storages use paths instead of ids, so this should work
    return downloadById(remotePath, localPath, callback, errorCallback);
}

Networking::Request *Storage::downloadById(Common::String remoteId, Common::String localPath, BoolCallback callback, Networking::ErrorCallback errorCallback) {
    if (!errorCallback) errorCallback = getErrorPrintingCallback();

    Common::DumpFile *f = new Common::DumpFile();
    if (!f->open(localPath, true)) {
        warning("Storage: unable to open file to download into");
        if (errorCallback) (*errorCallback)(Networking::ErrorResponse(nullptr, false, true, "", -1));
        delete errorCallback;
        delete callback;
        delete f;
        return nullptr;
    }

    return addRequest(new DownloadRequest(this, callback, errorCallback, remoteId, f));
}

Networking::Request *Storage::downloadFolder(Common::String remotePath, Common::String localPath, FileArrayCallback callback, Networking::ErrorCallback errorCallback, bool recursive) {
    if (!errorCallback)
        errorCallback = getErrorPrintingCallback();
    return addRequest(new FolderDownloadRequest(this, callback, errorCallback, remotePath, localPath, recursive));
}

SavesSyncRequest *Storage::syncSaves(BoolCallback callback, Networking::ErrorCallback errorCallback) {
    _runningRequestsMutex.lock();
    if (_savesSyncRequest) {
        warning("Storage::syncSaves: there is a sync in progress already");
        _syncRestartRequestsed = true;
        _runningRequestsMutex.unlock();
        return _savesSyncRequest;
    }
    if (!callback)
        callback = new Common::Callback<Storage, BoolResponse>(this, &Storage::savesSyncDefaultCallback);
    if (!errorCallback)
        errorCallback = new Common::Callback<Storage, Networking::ErrorResponse>(this, &Storage::savesSyncDefaultErrorCallback);
    _savesSyncRequest = new SavesSyncRequest(this, callback, errorCallback);
    _syncRestartRequestsed = false;
    _runningRequestsMutex.unlock();
    return (SavesSyncRequest *)addRequest(_savesSyncRequest); //who knows what that ConnMan could return in the future
}

bool Storage::isWorking() {
    _runningRequestsMutex.lock();
    bool working = _runningRequestsCount > 0;
    _runningRequestsMutex.unlock();
    return working;
}


bool Storage::isSyncing() {
    _runningRequestsMutex.lock();
    bool syncing = _savesSyncRequest != nullptr;
    _runningRequestsMutex.unlock();
    return syncing;
}

double Storage::getSyncDownloadingProgress() {
    double result = 1;
    _runningRequestsMutex.lock();
    if (_savesSyncRequest)
        result = _savesSyncRequest->getDownloadingProgress();
    _runningRequestsMutex.unlock();
    return result;
}

double Storage::getSyncProgress() {
    double result = 1;
    _runningRequestsMutex.lock();
    if (_savesSyncRequest)
        result = _savesSyncRequest->getProgress();
    _runningRequestsMutex.unlock();
    return result;
}

Common::Array<Common::String> Storage::getSyncingFiles() {
    Common::Array<Common::String> result;
    _runningRequestsMutex.lock();
    if (_savesSyncRequest)
        result = _savesSyncRequest->getFilesToDownload();
    _runningRequestsMutex.unlock();
    return result;
}

void Storage::cancelSync() {
    _runningRequestsMutex.lock();
    if (_savesSyncRequest)
        _savesSyncRequest->finish();
    _runningRequestsMutex.unlock();
}

void Storage::setSyncTarget(GUI::CommandReceiver *target) {
    _runningRequestsMutex.lock();
    if (_savesSyncRequest)
        _savesSyncRequest->setTarget(target);
    _runningRequestsMutex.unlock();
}

void Storage::savesSyncDefaultCallback(BoolResponse response) {
    _runningRequestsMutex.lock();
    _savesSyncRequest = nullptr;
    _runningRequestsMutex.unlock();

    if (!response.value)
        warning("SavesSyncRequest called success callback with `false` argument");
    Common::OSDMessageQueue::instance().addMessage(_("Saved games sync complete."));
}

void Storage::savesSyncDefaultErrorCallback(Networking::ErrorResponse error) {
    _runningRequestsMutex.lock();
    _savesSyncRequest = nullptr;
    _runningRequestsMutex.unlock();

    printErrorResponse(error);

    if (error.interrupted)
        Common::OSDMessageQueue::instance().addMessage(_("Saved games sync was cancelled."));
    else
        Common::OSDMessageQueue::instance().addMessage(_("Saved games sync failed.\nCheck your Internet connection."));
}


bool Storage::startDownload(Common::String remotePath, Common::String localPath) {
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest) {
        warning("Storage::startDownload: there is a download in progress already");
        _runningRequestsMutex.unlock();
        return false;
    }
    _downloadFolderRequest = (FolderDownloadRequest *)downloadFolder(
        remotePath, localPath,
        new Common::Callback<Storage, FileArrayResponse>(this, &Storage::directoryDownloadedCallback),
        new Common::Callback<Storage, Networking::ErrorResponse>(this, &Storage::directoryDownloadedErrorCallback),
        true
    );
    _runningRequestsMutex.unlock();
    return true;
}

void Storage::cancelDownload() {
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        _downloadFolderRequest->finish();
    _runningRequestsMutex.unlock();
}

void Storage::setDownloadTarget(GUI::CommandReceiver *target) {
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        _downloadFolderRequest->setTarget(target);
    _runningRequestsMutex.unlock();
}

bool Storage::isDownloading() {
    _runningRequestsMutex.lock();
    bool syncing = _downloadFolderRequest != nullptr;
    _runningRequestsMutex.unlock();
    return syncing;
}

double Storage::getDownloadingProgress() {
    double result = 1;
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getProgress();
    _runningRequestsMutex.unlock();
    return result;
}

uint64 Storage::getDownloadBytesNumber() {
    uint64 result = 0;
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getDownloadedBytes();
    _runningRequestsMutex.unlock();
    return result;
}

uint64 Storage::getDownloadTotalBytesNumber() {
    uint64 result = 0;
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getTotalBytesToDownload();
    _runningRequestsMutex.unlock();
    return result;
}

uint64 Storage::getDownloadSpeed() {
    uint64 result = 0;
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getDownloadSpeed();
    _runningRequestsMutex.unlock();
    return result;
}

Common::String Storage::getDownloadRemoteDirectory() {
    Common::String result = "";
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getRemotePath();
    _runningRequestsMutex.unlock();
    return result;
}

Common::String Storage::getDownloadLocalDirectory() {
    Common::String result = "";
    _runningRequestsMutex.lock();
    if (_downloadFolderRequest)
        result = _downloadFolderRequest->getLocalPath();
    _runningRequestsMutex.unlock();
    return result;
}

void Storage::directoryDownloadedCallback(FileArrayResponse response) {
    _runningRequestsMutex.lock();
    _downloadFolderRequest = nullptr;
    _runningRequestsMutex.unlock();

    Common::String message;
    if (response.value.size()) {
        message = Common::String::format(_("Download complete.\nFailed to download %u files."), response.value.size());
    } else {
        message = _("Download complete.");
    }
    Common::OSDMessageQueue::instance().addMessage(message.c_str());
}

void Storage::directoryDownloadedErrorCallback(Networking::ErrorResponse error) {
    _runningRequestsMutex.lock();
    _downloadFolderRequest = nullptr;
    _runningRequestsMutex.unlock();

    Common::OSDMessageQueue::instance().addMessage(_("Download failed."));
}

} // End of namespace Cloud