/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you 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 .
 */

#include <rtl/ustrbuf.hxx>
#include <unotools/configmgr.hxx>
#include <unotools/bootstrap.hxx>
#include <unotools/docinfohelper.hxx>
#include <rtl/bootstrap.hxx>
#include <officecfg/Office/Common.hxx>

using namespace ::com::sun::star;

namespace utl
{

OUString DocInfoHelper::GetGeneratorString()
{
    static const OUString sGenerator = []()
            {
            OUString aResultOverride = officecfg::Office::Common::Save::Document::GeneratorOverride::get();
            if( !aResultOverride.isEmpty())
                return aResultOverride;

            OUStringBuffer aResult(128);

            // First product: branded name + version
            // version is <product_versions>_<product_extension>$<platform>

            // plain product name
            OUString aValue( utl::ConfigManager::getProductName() );
            if ( !aValue.isEmpty() )
            {
                aResult.append( aValue.replace( ' ', '_' ) + "/" );

                aValue = utl::ConfigManager::getProductVersion();
                if ( !aValue.isEmpty() )
                {
                    aResult.append( aValue.replace( ' ', '_' ) );

                    aValue = utl::ConfigManager::getProductExtension();
                    if ( !aValue.isEmpty() )
                    {
                        aResult.append( aValue.replace( ' ', '_' ) );
                    }
                }

                OUString os( u"$_OS"_ustr );
                OUString arch( u"$_ARCH"_ustr );
                ::rtl::Bootstrap::expandMacros(os);
                ::rtl::Bootstrap::expandMacros(arch);
                aResult.append( "$" + os + "_" + arch + " " );
            }

            // second product: LibreOffice_project/<build_information>
            // build_information has '(' and '[' encoded as '$', ')' and ']' ignored
            // and ':' replaced by '-'
            {
                aResult.append( "LibreOffice_project/" );
                OUString aBuildId( Bootstrap::getBuildIdData( OUString() ) );
                for( sal_Int32 i=0; i < aBuildId.getLength(); i++ )
                {
                    sal_Unicode c = aBuildId[i];
                    switch( c )
                    {
                    case '(':
                    case '[':
                        aResult.append( '$' );
                        break;
                    case ')':
                    case ']':
                        break;
                    case ':':
                        aResult.append( '-' );
                        break;
                    default:
                        aResult.append( c );
                        break;
                    }
                }
            }

            return aResult.makeStringAndClear();
    }();
    return sGenerator;
}

} // end of namespace utl

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