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#include "simplemovefileoperation.h"

#include <QtCore/QFileInfo>

namespace QInstaller {

SimpleMoveFileOperation::SimpleMoveFileOperation()
{
    setName(QLatin1String("SimpleMoveFile"));
}

void SimpleMoveFileOperation::backup()
{
}

bool SimpleMoveFileOperation::performOperation()
{
    const QStringList args = arguments();
    if (args.count() != 2) {
        setError(InvalidArguments);
        setErrorString(QString("Invalid arguments in %0: %1 arguments given, %2 expected%3.")
            .arg(name()).arg(arguments().count()).arg(tr("exactly 2"), QLatin1String("")));
        return false;
    }

    const QString source = args.at(0);
    const QString target = args.at(1);

    if (source.isEmpty() || target.isEmpty()) {
        setError(UserDefinedError);
        setErrorString(tr("None of the arguments can be empty: source '%1', target '%2'.")
            .arg(source, target));
        return false;
    }

    // If destination file exists, then we cannot use QFile::copy() because it does not overwrite an existing
    // file. So we remove the destination file.
    QFile file(target);
    if (file.exists()) {
        if (!file.remove()) {
            setError(UserDefinedError);
            setErrorString(tr("Cannot move source '%1' to target '%2', because target exists and is "
                "not removable.").arg(source, target));
            return false;
        }
    }

    file.setFileName(source);
    if (!file.rename(target)) {
        setError(UserDefinedError);
        setErrorString(tr("Cannot move source '%1' to target '%2': %3").arg(source, target,
            file.errorString()));
        return false;
    }

    emit outputTextChanged(tr("Move '%1' to '%2'.").arg(source, target));
    return true;
}

bool SimpleMoveFileOperation::undoOperation()
{
    const QString source = arguments().at(0);
    const QString target = arguments().at(1);

    QFile(target).rename(source);
    emit outputTextChanged(tr("Move '%1' to '%2'.").arg(target, source));

    return true;
}

bool SimpleMoveFileOperation::testOperation()
{
    return true;
}

Operation *SimpleMoveFileOperation::clone() const
{
    return new SimpleMoveFileOperation();
}

}   // namespace QInstaller
