files.cpp 27.9 KB
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/*
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 * Copyright (C) 2014-2017 CZ.NIC
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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 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * 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
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 *
 * In addition, as a special exception, the copyright holders give
 * permission to link the code of portions of this program with the
 * OpenSSL library under certain conditions as described in each
 * individual source file, and distribute linked combinations including
 * the two.
 */

#include <QDebug>
#include <QDesktopServices>
#include <QUrl>
#include <QMimeDatabase>
#include <QFileDialog>
#include <QMimeType>
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#include <QQmlEngine> /* qmlRegisterType */
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#include "src/common.h"
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#include "src/dialogues/dialogues.h"
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#include "src/files.h"
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#include "src/settings.h"
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#include "src/io/filesystem.h"
#include "ios/src/url_opener.h"
#include "src/models/accountmodel.h"
#include "src/sqlite/file_db_container.h"
#include "src/sqlite/message_db_container.h"
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#include "src/net/xml_layer.h"
#include "src/sqlite/dbs.h"

#ifndef Q_OS_WIN
#include "src/crypto/crypto.h"
#endif

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/*!
 * @brief Creates email header and message body.
 *
 * @param[in,out] message String to append data to.
 * @param[in] body Email body.
 * @param[in] subj Subject text.
 * @param[in] boundary Boundary to be used,
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 */
static
void createEmailMessage(QString &message, const QString &body,
    const QString &subj, const QString &boundary)
{
	message.clear();

	const QString newLine("\n"); /* "\r\n" ? */

	/* Rudimentary header. */
	message += "Subject: " + subj + newLine;
	message += "MIME-Version: 1.0" + newLine;
	message += "Content-Type: multipart/mixed;" + newLine +
	    " boundary=\"" + boundary + "\"" + newLine;

	/* Body. */
	message += newLine;
	message += "--" + boundary + newLine;
	message += "Content-Type: text/plain; charset=UTF-8" + newLine;
	message += "Content-Transfer-Encoding: 8bit" + newLine;

	message += newLine;
	message += "-- " + newLine; /* Must contain the space. */
	message += body + newLine;
}

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/*!
 * @brief Adds attachment into email.
 *
 * @param[in,out] message String to append data to.
 * @param[in] attachName Attachment name.
 * @param[in] base64 Base64-encoded attachment.
 * @param[in] boundary Boundary to be used.
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 */
static
void addAttachmentToEmailMessage(QString &message, const QString &attachName,
    const QByteArray &base64, const QString &boundary)
{
	const QString newLine("\n"); /* "\r\n" ? */

	QMimeDatabase mimeDb;

	QMimeType mimeType(
	    mimeDb.mimeTypeForData(QByteArray::fromBase64(base64)));

	message += newLine;
	message += "--" + boundary + newLine;
	message += "Content-Type: " + mimeType.name() + "; charset=UTF-8;"
	    + newLine + " name=\"" + attachName +  "\"" + newLine;
	message += "Content-Transfer-Encoding: base64" + newLine;
	message += "Content-Disposition: attachment;" + newLine +
	    " filename=\"" + attachName + "\"" + newLine;

	for (int i = 0; i < base64.size(); ++i) {
		if ((i % 60) == 0) {
			message += newLine;
		}
		message += base64.at(i);
	}
	message += newLine;
}

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/*!
 * @brief Adds last line into email.
 *
 * @param[in,out] message String to append data to.
 * @param[in] boundary Boundary to be used.
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 */
static
void finishEmailMessage(QString &message, const QString &boundary)
{
	const QString newLine("\n"); /* "\r\n" ? */
	message += newLine + "--" + boundary + "--" + newLine;
}

Files::Files(QObject *parent) : QObject(parent)
{
}

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/*!
 * @brief Set attachment model content.
 *
 * @param[in,out] model Model to be set.
 * @param[in] fileList Attachment list to be added into the model.
 */
static
void setZfoFilesToModel(FileListModel &model,
    const QList<Files::File> &fileList)
{
	model.clearAll();

	foreach (const Files::File &file, fileList) {
		model.appendFileEntry(FileListModel::Entry(-1, file.dmFileDescr,
		    file._dmFileSize, file._icon, file.dmEncodedContent));
	}
}

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void Files::deleteExpiredFilesFromDbs(int days)
{
	qDebug("%s()", __func__);

	QStringList msgIDList;
	QStringList userNameList = AccountListModel::globAccounts.keys();
	foreach (const QString &userName, userNameList) {
		FileDb *fDb = NULL;
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		fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
		    AccountListModel::globAccounts[userName].storeToDisk());
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		if (fDb == NULL) {
			qDebug() << "ERROR: File database cannot open!" << userName;
			return;
		}
		msgIDList = fDb->cleanFilesInDb(days);
		if (msgIDList.isEmpty()) {
			continue;
		}

		MessageDb *msgDb = NULL;
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		msgDb = globMessageDbsPtr->accessMessageDb(globSet.dbsLocation,
		    userName, AccountListModel::globAccounts[userName].storeToDisk());
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		if (msgDb == NULL) {
			qDebug() << "ERROR: Message database cannot open!";
			return;
		}
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		msgDb->beginTransaction();
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		foreach (const QString &msgId, msgIDList) {
			msgDb->setAttachmentDownloaded(msgId.toLongLong(),
			    false);
		}
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		msgDb->commitTransaction();
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	}
}

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/*!
 * @brief Obtain attachment from database.
 *
 * @param[out] file File data to be acquired.
 * @param[in] userName User name identifying the account.
 * @param[in] msgIdStr String with message id.
 * @param[in] fileId Attachment file identifier.
 */
static
void getAttchment(FileDb::FileData &file, const QString &userName,
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    qint64 msgId, int fileId)
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{
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	file.filename = QString();
	file.content = QString();
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	if (userName.isEmpty() || (msgId <= 0) || (fileId < 0)) {
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		return;
	}

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	FileDb *fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation,
	    userName, AccountListModel::globAccounts[userName].storeToDisk());
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	if (fDb == Q_NULLPTR) {
		qCritical() << "Cannot open file database!";
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		return;
	}

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	file = fDb->getFileContentFromDb(fileId);
}
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QByteArray Files::getAttachmentDb(const QString &userName,
    const QString &msgIdStr, int fileId)
{
	qDebug("%s()", __func__);

	/* Obtain message identifier. */
	bool ok = false;
	qint64 msgId = msgIdStr.toLongLong(&ok);
	if (!ok || (msgId < 0)) {
		return QByteArray();
	}

	FileDb::FileData file;
	getAttchment(file, userName, msgId, fileId);

	return QByteArray::fromBase64(file.content.toUtf8());
}

void Files::openAttachmentFromDb(const QString &userName,
    const QString &msgIdStr, int fileId)
{
	qDebug("%s()", __func__);

	/* Obtain message identifier. */
	bool ok = false;
	qint64 msgId = msgIdStr.toLongLong(&ok);
	if (!ok || (msgId < 0)) {
		return;
	}

	FileDb::FileData file;
	getAttchment(file, userName, msgId, fileId);

	Q_ASSERT(!file.filename.isEmpty());
	if (file.filename.isEmpty()) {
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		qDebug() << "ERROR: File name is empty!";
		return;
	}

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	openAttachment(file.filename, file.content.toUtf8());
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}

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void Files::openAttachment(const QString &fileName, const QByteArray &base64Data)
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{

	Q_ASSERT(!fileName.isEmpty());
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	Q_ASSERT(!base64Data.isEmpty());
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	if (fileName.isEmpty() || base64Data.isEmpty()) {
		qCritical() << "File name or its content is empty!";
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		return;
	}

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	if (isZfoFile(fileName)) {
		/* Don't open zfo files from here. */
		Q_ASSERT(0);
		qCritical() << "This should open ZFO files by itself.";
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		return;
	}

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	QByteArray rawData(QByteArray::fromBase64(base64Data));
	QString filePath(writeFileToTmpDir(fileName, TEMP_DIR_NAME, rawData));
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	if (!filePath.isEmpty()) {
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		qInfo() << "Creating temporary file" << filePath;
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#if defined Q_OS_IOS
		UrlOpener urlOpener;
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		urlOpener.openFile(filePath);
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		/*
		 * TODO - we may check exceptions form objective-C (openFile)
		 * and return as bool.
		 */
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#else /* !defined Q_OS_IOS */
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		if (!QDesktopServices::openUrl(QUrl::fromLocalFile(filePath))) {
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			Dialogues::errorMessage(Dialogues::CRITICAL,
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			    tr("Open attachment error"),
			    tr("There is no application to open this file format."),
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			    tr("File: '%1'").arg(filePath));
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		}
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#endif /* defined Q_OS_IOS */
	} else {
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		qCritical() << "Cannot create temporary file for" << fileName;
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		Dialogues::errorMessage(Dialogues::CRITICAL,
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		    tr("Open attachment error"),
		    tr("Cannot save selected file to disk for opening."),
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		    QString());
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	}
}

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void Files::sendAttachmentsWithEmailFromDb(const QString &userName,
    qint64 msgId)
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{
	qDebug("%s()", __func__);

	if (userName.isEmpty() || msgId <= 0) {
		return;
	}

	QString body;
	QString subject;
	QStringList fileList;

	QString emailMessage;
	const QString boundary("-----123456789asdfghj_" +
	QDateTime::currentDateTimeUtc().toString(
	    "dd.MM.yyyy-HH:mm:ss.zzz"));

	MessageDb *msgDb = NULL;
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	msgDb = globMessageDbsPtr->accessMessageDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());
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	if (msgDb == NULL) {
		qDebug() << "ERROR: Message database cannot open!";
		return;
	}
	if (!msgDb->getMessageDataForEmail(msgId, body, subject)) {
		qDebug() << "ERROR: Message data mssing!";
		return;
	}

	FileDb *fDb = NULL;
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	fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());
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	if (fDb == NULL) {
		qDebug() << "ERROR: File database cannot open!";
		return;
	}

	QList<FileDb::FileData> filelist;

	filelist = fDb->getFilesFromDb(msgId);
	if (filelist.isEmpty()) {
		qDebug() << "ERROR: File list is empty!";
		return;
	}

	createEmailMessage(emailMessage, body, subject,  boundary);

	deleteFilesFromDir(EMAIL_DIR_NAME);

	QString fileName;
	foreach (const FileDb::FileData &file, filelist) {
		fileName = file.filename;
		if (fileName.isEmpty()) {
			qDebug() << "ERROR: File name is empty!";
			return;
		}
		QByteArray data = QByteArray::fromBase64(file.content.toUtf8());
		fileName = writeFileToEmailDir(fileName, msgId, data);
		fileList.append(fileName);
		addAttachmentToEmailMessage(emailMessage, file.filename,
		    file.content.toUtf8(), boundary);
		qDebug() << fileName;
	}

	finishEmailMessage(emailMessage, boundary);

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	sendEmail(emailMessage, fileList, subject, body, msgId);
}
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void Files::deleteFileDb(const QString &userName)
{
	qDebug("%s()", __func__);

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	int msgResponse = Dialogues::message(Dialogues::QUESTION,
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	    tr("Delete files: %1").arg(userName),
	    tr("Do you want to clean up the file database of account '%1'?").arg(userName),
	    tr("Note: All attachment files of messages will be removed from the database."),
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	    Dialogues::NO | Dialogues::YES, Dialogues::NO);
	if (msgResponse == Dialogues::NO) {
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		return;
	}

	FileDb *fDb = NULL;
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	fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());
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	if (fDb == NULL) {
		qDebug() << "ERROR: File database open error!";
		return;
	}
	if (!globFileDbsPtr->deleteDb(fDb)) {
		qDebug() << "ERROR: File database could not delete!";
		return;
	}

	MessageDb *msgDb = NULL;
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	msgDb = globMessageDbsPtr->accessMessageDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());
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	if (msgDb == NULL) {
		qDebug() << "ERROR: Message database cannot open!";
		return;
	}
	if (!msgDb->setAttachmentsDownloaded(false)) {
		qDebug() << "ERROR: Message data mssing!";
		return;
	}
}
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void Files::vacuumFileDbs(void)
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{
	qDebug("%s()", __func__);

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	emit statusBarTextChanged(tr("Vacuum databases"), true);
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	QStringList userNameList = AccountListModel::globAccounts.keys();
	foreach (const QString &userName, userNameList) {
		FileDb *fDb = NULL;
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		fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
		    AccountListModel::globAccounts[userName].storeToDisk());
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		if (fDb == NULL) {
			qDebug() << "ERROR: File database cannot open!" << userName;
			return;
		}
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		fDb->vacuumFileDb();
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	}

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	emit statusBarTextChanged(tr("Operation Vacuum has finished"), false);
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}
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bool Files::deleteAttachmentsFromDb(const QString &userName, qint64 msgId)
{
	qDebug("%s()", __func__);

	FileDb *fDb = NULL;
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	fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());
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	if (fDb == NULL) {
		qDebug() << "ERROR: File database cannot open!" << userName;
		return false;
	}

	if (fDb->deleteFilesFromDb(msgId)) {
		MessageDb *msgDb = NULL;
		msgDb = globMessageDbsPtr->accessMessageDb(globSet.dbsLocation,
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		    userName, AccountListModel::globAccounts[userName].storeToDisk());
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		if (msgDb == NULL) {
			qDebug() << "ERROR: Message database cannot open!";
			return false;
		}
		return msgDb->setAttachmentDownloaded(msgId, false);
	}

	return false;
}
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bool Files::fileReadable(const QString &filePath)
{
	if (filePath.isEmpty()) {
		Q_ASSERT(0);
		qCritical() << "Target ZFO path is empty!";
		return false;
	}

	{
		QFileInfo fileInfo(filePath);
		if (!fileInfo.isFile() || !fileInfo.isReadable()) {
			qCritical() << "Cannot open ZFO file from" << filePath;
			return false;
		}
	}

	return true;
}

bool Files::isZfoFile(const QString &fileName)
{
	return QFileInfo(fileName).suffix().toLower() == QStringLiteral("zfo");
}

QByteArray Files::rawFileContent(const QString &filePath)
{
	if (!fileReadable(filePath)) {
		return QByteArray();
	}

	QFile file(filePath);
	if (!file.open(QIODevice::ReadOnly)) {
		Q_ASSERT(0);
		qCritical() << "Cannot open file" << filePath;
		return QByteArray();
	}

	QByteArray rawData(file.readAll());
	file.close();
	return rawData;
}

QByteArray Files::base64ToRaw(const QByteArray &base64Data)
{
	return QByteArray::fromBase64(base64Data);
}

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MsgInfo *Files::zfoData(const QVariant &attachModelVariant,
    const QByteArray &rawZfoData)
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{
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	enum MsgInfo::ZfoType type = MsgInfo::TYPE_UNKNOWN;
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	QString idStr, annot, htmlDescr, emailBody;
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	bool ret = parseXmlData(&type, &idStr, &annot, &htmlDescr,
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	    FileListModel::fromVariant(attachModelVariant),
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	    &emailBody, getXmlFromCms(rawZfoData));
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	return ret ?
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	    new (std::nothrow) MsgInfo(type, idStr, annot, htmlDescr,
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	        emailBody) :
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	    new (std::nothrow) MsgInfo();
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}

bool Files::setAttachmentModel(FileListModel &attachModel,
    const QString &userName, qint64 msgId)
{
	qDebug("%s()", __func__);

	FileDb *fDb = Q_NULLPTR;
	fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
	    AccountListModel::globAccounts[userName].storeToDisk());

	if (fDb == Q_NULLPTR) {
		qCritical() << "Cannot open file database!";
		return false;
	}
	attachModel.clearAll();
	fDb->getFileListFromDb(attachModel, msgId);
	return true;
}

void Files::sendAttachmentEmailZfo(const QVariant &attachModelVariant,
    const QString &msgIdStr, QString subject, QString body)
{
	qDebug("%s()", __func__);

	/* Obtain pointer to attachment model. */
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	const FileListModel *attachModel =
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	    FileListModel::fromVariant(attachModelVariant);
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	if (attachModel == Q_NULLPTR) {
		Q_ASSERT(0);
		return;
	}

	/* Obtain message identifier. */
	bool ok = false;
	qint64 msgId = msgIdStr.toLongLong(&ok);
	if (!ok || (msgId < 0)) {
		return;
	}

	QStringList fileList;
	QString emailMessage;
	QString boundary("-----123456789asdfghj_" +
	QDateTime::currentDateTimeUtc().toString(
	    "dd.MM.yyyy-HH:mm:ss.zzz"));

	createEmailMessage(emailMessage, body, subject,  boundary);
	deleteFilesFromDir(EMAIL_DIR_NAME);

	QString filePath;
	QByteArray data;

	for (int row = 0; row < attachModel->rowCount(); ++row) {
		QModelIndex idx(attachModel->index(row));
		/*
		 * On Android the attachment must be saved and the explicitly
		 * add into the email message.
		 */
		QByteArray base64Data(attachModel->data(idx,
		    FileListModel::ROLE_FILE_DATA).toByteArray());
		QByteArray rawData(QByteArray::fromBase64(base64Data));
		QString attachName(attachModel->data(idx,
		    FileListModel::ROLE_FILE_NAME).toString());
		QString filePath(
		    writeFileToEmailDir(attachName, msgId, rawData));
		fileList.append(filePath);
		addAttachmentToEmailMessage(emailMessage, attachName,
		    base64Data, boundary);
	}

	finishEmailMessage(emailMessage, boundary);

	sendEmail(emailMessage, fileList, subject, body, msgId);
}

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/*!
 * @brief Obtain path for storing attachments.
 *
 * @return Path to location where attachment can be stored.
 */
static
QString obtainStoragePath(void)
{
	QString path(getBasePathBasedOnPlatform());

#if defined Q_OS_IOS
	/* There is only one location where files or data can store
	 * permanently and share with Desktop.
	 * See: https://developer.apple.com/library/content/documentation/FileManagement/Conceptual/FileSystemProgrammingGuide/FileSystemOverview/FileSystemOverview.html
	 */

	path = QStandardPaths::writableLocation(QStandardPaths::DocumentsLocation);
#else
	/* Another platform can select destination for attachment saving. */
	path = QFileDialog::getExistingDirectory(Q_NULLPTR,
	    QObject::tr("Select directory"), path,
	    QFileDialog::ShowDirsOnly | QFileDialog::DontResolveSymlinks);
#endif

	return path;
}

/*!
 * @brief Generates a notification dialogue about the result of attachment
 *     saving.
 *
 * @param[in] destPath Path to which the attachment was saved.
 */
static
void attachmentSavingNotification(const QString &destPath)
{
	QFileInfo fi(destPath);

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	Dialogues::errorMessage(
	    !destPath.isEmpty() ? Dialogues::INFORMATION : Dialogues::CRITICAL,
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	    QObject::tr("Attachment saving"),
	    !destPath.isEmpty() ? QObject::tr("Attachments have been saved.") :
	        QObject::tr("Attachments have not been saved!"),
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	    QObject::tr("Path: '%1'").arg(fi.absolutePath()));
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}

void Files::saveAttachmentsToDiskDb(const QString &userName,
    const QString &msgIdStr)
{
	qDebug("%s()", __func__);

	/* User name must be supplied. */
	if (userName.isEmpty()) {
		Q_ASSERT(0);
		return;
	}

	/* Obtain message identifier. */
	bool ok = false;
	qint64 msgId = msgIdStr.toLongLong(&ok);
	if (!ok || (msgId < 0)) {
		return;
	}

	QList<FileDb::FileData> filelist;
	{
		FileDb *fDb = Q_NULLPTR;
		fDb = globFileDbsPtr->accessFileDb(globSet.dbsLocation, userName,
		    AccountListModel::globAccounts[userName].storeToDisk());

		if (fDb == Q_NULLPTR) {
			qCritical() << "Cannot open file database!";
			return;
		}

		filelist = fDb->getFilesFromDb(msgId);
		if (filelist.isEmpty()) {
			qCritical() << "File list is empty!";
			return;
		}

	}

	QString path(obtainStoragePath());

	QString destPath;
	foreach (const FileDb::FileData &file, filelist) {
		QByteArray data = QByteArray::fromBase64(file.content.toUtf8());
		destPath = writeFileToDir(path, file.filename, msgId, data);
	}

	attachmentSavingNotification(destPath);
}

void Files::saveAttachmentsToDiskZfo(const QVariant &attachModelVariant,
    const QString &msgIdStr)
{
	qDebug("%s()", __func__);

	/* Obtain pointer to attachment model. */
	const FileListModel *attachModel =
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	    FileListModel::fromVariant(attachModelVariant);
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	if (attachModel == Q_NULLPTR) {
		Q_ASSERT(0);
		return;
	}

	/* Obtain message identifier. */
	bool ok = false;
	qint64 msgId = msgIdStr.toLongLong(&ok);
	if (!ok || (msgId < 0)) {
		return;
	}

	QString path(obtainStoragePath());

	QString destPath;
	for (int row = 0; row < attachModel->rowCount(); ++row) {
		QModelIndex idx(attachModel->index(row));
		QByteArray data(QByteArray::fromBase64(attachModel->data(
		    idx, FileListModel::ROLE_FILE_DATA).toByteArray()));
		destPath = writeFileToDir(path,
		    attachModel->data(idx,
		        FileListModel::ROLE_FILE_NAME).toString(),
		    msgId, data);
	}

	attachmentSavingNotification(destPath);
}

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void Files::deleteTmpFileFromStorage(const QString &filePath)
{
#if defined Q_OS_IOS
	QFile file(filePath);
	file.remove();
#else
	Q_UNUSED(filePath);
#endif /* defined Q_OS_IOS */
}

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void Files::sendEmail(const QString &emailMessage, const QStringList &fileList,
    const QString &subject, const QString &body, qint64 msgId)
{
	Q_UNUSED(subject);
	Q_UNUSED(body);
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	Q_UNUSED(emailMessage);
	Q_UNUSED(msgId);
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	if (!fileList.isEmpty()) {

#if defined Q_OS_IOS
		UrlOpener urlOpener;
		urlOpener.createEmail(body, subject, fileList);
#elif defined Q_OS_ANDROID
		QDesktopServices::openUrl(QUrl("mailto:?subject=" +
		    subject + "&body=" + body));
#elif defined Q_OS_WINRT
		QDesktopServices::openUrl(QUrl("mailto:?subject=" +
		    subject + "&body=" + body));
#else
		QString tmpEmailFile = writeFileToEmailDir(QString::number(msgId)
		    + "_mail.eml", msgId, emailMessage.toUtf8());
		QDesktopServices::openUrl(QUrl::fromLocalFile(tmpEmailFile));
#endif
		/* TODO -- Handle openUrl() return value. */

	} else {
		qDebug() << "Tmp file save error";
	}
}

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QByteArray Files::getXmlFromCms(const QByteArray &rawData)
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{
	qDebug("%s()", __func__);

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	if (rawData.isEmpty()) {
		Q_ASSERT(0);
		qCritical() << "File content is empty!";
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		return QByteArray();
	}

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	/* Decode CMS and obtain message XML data - uses OpenSSL. */
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	void *xmlContent = NULL;
	size_t xmlContentLen = 0;
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	if (extract_cms_data(rawData.data(), rawData.length(), &xmlContent,
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	        &xmlContentLen) != 0) {
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		return QByteArray();
	}
	if (xmlContentLen == 0) {
		free(xmlContent); xmlContent = NULL;
		return QByteArray();
	}

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	QByteArray soap((char *)xmlContent, xmlContentLen);
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	free(xmlContent); xmlContent = NULL;

	return soap;
}

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QByteArray Files::decodeZfoFile(const QByteArray &base64ZfoData)
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{
	qDebug("%s()", __func__);

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	if (base64ZfoData.isEmpty()) {
		Q_ASSERT(0);
		qCritical() << "File content is empty.";
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		return QByteArray();
	}

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	/* decode signature from base64 and obtain something CMS message */
	return getXmlFromCms(QByteArray::fromBase64(base64ZfoData));
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}

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bool Files::parseXmlData(enum MsgInfo::ZfoType *type, QString *idStr,
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    QString *annotation, QString *msgDescrHtml, FileListModel *attachModel,
    QString *emailBody, QByteArray xmlData)
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{
	qDebug("%s()", __func__);

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	if (xmlData.isEmpty()) {
		qCritical() << "XML content is empty!";
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		return false;
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	}

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	//qDebug() << xmlData;

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	xmlData.prepend("<?xml version='1.0' encoding='utf-8'?>"
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	      "<SOAP-ENV:Envelope "
	      "xmlns:SOAP-ENV=\"http://schemas.xmlsoap.org/soap/envelope/\" "
	      "xmlns:xsd=\"http://www.w3.org/2001/XMLSchema\">"
	      "<SOAP-ENV:Body>");
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	xmlData.append("</SOAP-ENV:Body></SOAP-ENV:Envelope>");
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	/* Test if zfo is message, delivery info or unknown format */
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	if (xmlData.contains(QByteArray("MessageDownloadResponse"))) {
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		if (type != Q_NULLPTR) {
			*type = MsgInfo::TYPE_MESSAGE;
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		}
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		return parseAndShowXmlData(MsgInfo::TYPE_MESSAGE, idStr,
		    annotation, msgDescrHtml, attachModel, emailBody, xmlData);
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	} else if (xmlData.contains(QByteArray("GetDeliveryInfoResponse"))) {
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		if (type != Q_NULLPTR) {
			*type = MsgInfo::TYPE_DELIVERY_INFO;
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		}
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		return parseAndShowXmlData(MsgInfo::TYPE_DELIVERY_INFO, idStr,
		    annotation, msgDescrHtml, attachModel, emailBody, xmlData);
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	} else {
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		if (type != Q_NULLPTR) {
			*type = MsgInfo::TYPE_UNKNOWN;
		}
		qCritical() << "Unknown ZFO format";
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	}

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	return false;
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}

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bool Files::parseAndShowXmlData(enum MsgInfo::ZfoType type, QString *idStr,
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    QString *annotation, QString *msgDescrHtml, FileListModel *attachModel,
    QString *emailBody, QByteArray &xmlData)
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{
	qDebug("%s()", __func__);

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	QXmlStreamReader xml;
	XmlLayer xmlLayer;
	Messages::Message msg;
	QList<Files::File> fileList;
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	QList<Messages::Event> eventList;
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	if (type == MsgInfo::TYPE_UNKNOWN) {
		Q_ASSERT(0);
		return false;
	}

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	/* parse message envelope and files */
	xml.addData(xmlData);
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	while(!xml.atEnd() && !xml.hasError()) {
		QXmlStreamReader::TokenType token = xml.readNext();
		if (xml.error() != QXmlStreamReader::NoError) {
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			return false;
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		}
		if (token == QXmlStreamReader::StartDocument) {
			continue;
		}
		if (token == QXmlStreamReader::StartElement) {
			if (xml.name() == "dmDm") {
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				xmlLayer.completeMessageParse(xml, msg, fileList);
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			}
		}
	}

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	if (type == MsgInfo::TYPE_DELIVERY_INFO) {
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		/* parse delivery info */
		xml.clear();
		xml.addData(xmlData);
		while(!xml.atEnd() && !xml.hasError()){
			QXmlStreamReader::TokenType token = xml.readNext();
			if (token == QXmlStreamReader::StartDocument) {
				continue;
			}
			if (token == QXmlStreamReader::StartElement) {
				if (xml.name() == "dmEvent") {
					eventList.append(xmlLayer.parseEvent(xml));
				}
			}
		}
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	}

	QString html = divStart;

	html += "<h3>" + QObject::tr("General") + "</h3>";
	html += strongInfoLine(QObject::tr("Subject"), msg.dmAnnotation);
	QString size = QString::number(msg.dmAttachmentSize);
	html += strongInfoLine(QObject::tr("Attachment size"),
	    (size == "0") ? "&lt;1 KB" : "~" + size + " KB");
	html += strongInfoLine(QObject::tr("Personal delivery"),
	    (msg.dmPersonalDelivery) ? QObject::tr("Yes") : QObject::tr("No"));
	html += strongInfoLine(QObject::tr("Delivery by fiction"),
	    (msg.dmAllowSubstDelivery) ? QObject::tr("Yes") : QObject::tr("No"));

	html += "<h3>" + QObject::tr("Sender") + "</h3>";
	html += strongInfoLine(QObject::tr("Databox ID"), msg.dbIDSender);
	html += strongInfoLine(QObject::tr("Name"), msg.dmSender);
	html += strongInfoLine(QObject::tr("Address"),msg.dmSenderAddress);

	html += "<h3>" + QObject::tr("Recipient") + "</h3>";
	html += strongInfoLine(QObject::tr("Databox ID"), msg.dbIDRecipient);
	html += strongInfoLine(QObject::tr("Name"), msg.dmRecipient);
	html += strongInfoLine(QObject::tr("Address"),msg.dmRecipientAddress);
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	if (!msg.dmToHands.isEmpty()) {
		html += strongInfoLine(QObject::tr("To hands"),
		    msg.dmToHands);
	}
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	QString tmpHtml;
	if (!msg.dmSenderIdent.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Our file mark"),
		    msg.dmSenderIdent);
	}
	if (!msg.dmSenderRefNumber.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Our reference number"),
		    msg.dmSenderRefNumber);
	}
	if (!msg.dmRecipientIdent.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Your file mark"),
		    msg.dmRecipientIdent);
	}
	if (!msg.dmRecipientRefNumber.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Your reference number"),
		    msg.dmRecipientRefNumber);
	}
	if (!msg.dmLegalTitleLaw.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Law"),
		    msg.dmLegalTitleLaw);
	}
	if (!msg.dmLegalTitleYear.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Year"),
		    msg.dmLegalTitleYear);
	}
	if (!msg.dmLegalTitleSect.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Section"),
		    msg.dmLegalTitleSect);
	}
	if (!msg.dmLegalTitlePar.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Paragraph"),
		    msg.dmLegalTitlePar);
	}
	if (!msg.dmLegalTitlePoint.isEmpty()) {
		tmpHtml += strongInfoLine(QObject::tr("Letter"),
		    msg.dmLegalTitlePoint);
	}
	if (!tmpHtml.isEmpty()) {
		html += "<h3>" + QObject::tr("Additional info") + "</h3>";
		html += tmpHtml;
	}
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	html += "<h3>" + QObject::tr("Message state") + "</h3>";
	html += strongInfoLine(QObject::tr("Delivery time"),
	    dateTimeStrFromDbFormat(
	        dateTimeStrToUTCDbFormat(msg.dmDeliveryTime),
	        DATETIME_QML_FORMAT));
	html += strongInfoLine(QObject::tr("Accetance time"),
	    dateTimeStrFromDbFormat(
	        dateTimeStrToUTCDbFormat(msg.dmAcceptanceTime),
	        DATETIME_QML_FORMAT));
	html += strongInfoLine(QObject::tr("Status"),
	    QString::number(msg.dmMessageStatus));

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	if (type == MsgInfo::TYPE_DELIVERY_INFO) {
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		html += "<h3>" + QObject::tr("Events") + "</h3>";
		foreach (const Messages::Event &event, eventList) {
			html += divStart +
			    strongInfoLine(dateTimeStrFromDbFormat(
			        dateTimeStrToUTCDbFormat(event.dmEventTime),
			        DATETIME_QML_FORMAT), event.dmEventDescr)
			    + divEnd;
		}
	}

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	html += divEnd;

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	// Create body for email
	QString body = QObject::tr("ID") + ": ";
		body += QString::number(msg.dmID) + "\n";
		body += QObject::tr("FROM") + ": ";
		body += msg.dmSender + "\n";
		body += QObject::tr("TO") + ": ";
		body += msg.dmRecipient  + "\n";
		body += QObject::tr("DELIVERED") + ": ";
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		body += dateTimeStrFromDbFormat(
		    dateTimeStrToUTCDbFormat(msg.dmAcceptanceTime),
		    DATETIME_QML_FORMAT)
		    + "\n\n---\n";
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		body += QObject::tr("This email has been generated with Datovka "
		    "application based on a data message (%1) delivered "
		    "to databox.").arg(msg.dmID);
		body += "\n";

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	if (idStr != Q_NULLPTR) {
		*idStr = QString::number(msg.dmID);
	}
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	if (annotation != Q_NULLPTR) {
		*annotation = msg.dmAnnotation;
	}
	if (msgDescrHtml != Q_NULLPTR) {
		*msgDescrHtml = html;
	}
	if (attachModel != Q_NULLPTR) {
		setZfoFilesToModel(*attachModel, fileList);
	}
	if (emailBody != Q_NULLPTR) {
		*emailBody = body;
	}
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	return true;
}