/* -*- 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 <cppuhelper/implbase.hxx>

#include <cppuhelper/supportsservice.hxx>

#include <tools/urlobj.hxx>

#include <rtl/ustrbuf.hxx>

#include <com/sun/star/util/XURLTransformer.hpp>

#include <com/sun/star/util/URL.hpp>

#include <com/sun/star/lang/XServiceInfo.hpp>

#include <com/sun/star/uno/XComponentContext.hpp>

namespace {

class URLTransformer : public ::cppu::WeakImplHelper< css::util::XURLTransformer, css::lang::XServiceInfo>

{

public:

    URLTransformer() {}

    virtual OUString SAL_CALL getImplementationName() override

    {

        return u"com.sun.star.comp.framework.URLTransformer"_ustr;

    }

    virtual sal_Bool SAL_CALL supportsService(OUString const & ServiceName) override

    {

        return cppu::supportsService(this, ServiceName);

    }

    virtual css::uno::Sequence<OUString> SAL_CALL getSupportedServiceNames() override

    {

        return {u"com.sun.star.util.URLTransformer"_ustr};

    }

    virtual sal_Bool SAL_CALL parseStrict( css::util::URL& aURL ) override;

    virtual sal_Bool SAL_CALL parseSmart( css::util::URL& aURL, const OUString& sSmartProtocol ) override;

    virtual sal_Bool SAL_CALL assemble( css::util::URL& aURL ) override;

    virtual OUString SAL_CALL getPresentation( const css::util::URL& aURL, sal_Bool bWithPassword ) override;

};

void lcl_ParserHelper(INetURLObject& _rParser, css::util::URL& _rURL)

{

    // Get all information about this URL.

    _rURL.Protocol  = INetURLObject::GetScheme( _rParser.GetProtocol() );

    _rURL.User      = _rParser.GetUser  ( INetURLObject::DecodeMechanism::WithCharset );

    _rURL.Password  = _rParser.GetPass  ( INetURLObject::DecodeMechanism::WithCharset );

    _rURL.Server        = _rParser.GetHost  ( INetURLObject::DecodeMechanism::WithCharset );

    _rURL.Port      = static_cast<sal_Int16>(_rParser.GetPort());

    sal_Int32 nCount = _rParser.getSegmentCount( false );

    if ( nCount > 0 )

    {

        // Don't add last segment as it is the name!

        --nCount;

        OUStringBuffer aPath(128);

        for ( sal_Int32 nIndex = 0; nIndex < nCount; nIndex++ )

        {

            aPath.append( "/"

                + _rParser.getName( nIndex, false, INetURLObject::DecodeMechanism::NONE ));

        }

        if ( nCount > 0 )

            aPath.append( '/' ); // final slash!

        _rURL.Path = aPath.makeStringAndClear();

        _rURL.Name = _rParser.getName( INetURLObject::LAST_SEGMENT, false, INetURLObject::DecodeMechanism::NONE );

    }

    else

    {

        _rURL.Path       = _rParser.GetURLPath( INetURLObject::DecodeMechanism::NONE           );

        _rURL.Name = _rParser.GetLastName();

    }

    _rURL.Arguments  = _rParser.GetParam();

    _rURL.Mark      = _rParser.GetMark( INetURLObject::DecodeMechanism::WithCharset );

    // INetURLObject supports only an intelligent method of parsing URL's. So write

    // back Complete to have a valid encoded URL in all cases!

    _rURL.Complete  = _rParser.GetMainURL( INetURLObject::DecodeMechanism::NONE           );

    _rParser.SetMark( u"" );

    _rParser.SetParam( u"" );

    _rURL.Main       = _rParser.GetMainURL( INetURLObject::DecodeMechanism::NONE           );

}

//  XURLTransformer

sal_Bool SAL_CALL URLTransformer::parseStrict( css::util::URL& aURL )

{

    // Safe impossible cases.

    if ( aURL.Complete.isEmpty() )

    {

        return false;

    }

    // Try to extract the protocol

    sal_Int32 nURLIndex = aURL.Complete.indexOf( ':' );

    if ( nURLIndex <= 1 )

        return false;

    std::u16string_view aProtocol = aURL.Complete.subView( 0, nURLIndex+1 );

    // If INetURLObject knows this protocol let it parse

    if ( INetURLObject::CompareProtocolScheme( aProtocol ) != INetProtocol::NotValid )

    {

        // Initialize parser with given URL.

        INetURLObject aParser( aURL.Complete );

        // Get all information about this URL.

        INetProtocol eINetProt = aParser.GetProtocol();

        if ( eINetProt == INetProtocol::NotValid )

        {

            return false;

        }

        else if ( !aParser.HasError() )

        {

            lcl_ParserHelper(aParser,aURL);

            // Return "URL is parsed".

            return true;

        }

    }

    else

    {

        // Minimal support for unknown protocols. This is mandatory to support the "Protocol Handlers" implemented

        // in framework!

        aURL.Protocol   = aProtocol;

        aURL.Main       = aURL.Complete;

        aURL.Path       = aURL.Complete.copy( nURLIndex+1 );

        // Return "URL is parsed".

        return true;

    }

    return false;

}

//  XURLTransformer

sal_Bool SAL_CALL URLTransformer::parseSmart( css::util::URL& aURL,

                                                const   OUString&    sSmartProtocol  )

{

    // Safe impossible cases.

    if ( aURL.Complete.isEmpty() )

    {

        return false;

    }

    // Initialize parser with given URL.

    INetURLObject aParser;

    aParser.SetSmartProtocol( INetURLObject::CompareProtocolScheme( sSmartProtocol ));

    bool bOk = aParser.SetSmartURL( aURL.Complete );

    if ( bOk )

    {

        lcl_ParserHelper(aParser,aURL);

        // Return "URL is parsed".

        return true;

    }

    else

    {

        // Minimal support for unknown protocols. This is mandatory to support the "Protocol Handlers" implemented

        // in framework!

        if ( INetURLObject::CompareProtocolScheme( sSmartProtocol ) == INetProtocol::NotValid )

        {

            // Try to extract the protocol

            sal_Int32 nIndex = aURL.Complete.indexOf( ':' );

            if ( nIndex > 1 )

            {

                OUString aProtocol = aURL.Complete.copy( 0, nIndex+1 );

                // If INetURLObject knows this protocol something is wrong as detected before =>

                // give up and return false!

                if ( INetURLObject::CompareProtocolScheme( aProtocol ) != INetProtocol::NotValid )

                    return false;

                else

                    aURL.Protocol = aProtocol;

            }

            else

                return false;

            aURL.Main = aURL.Complete;

            aURL.Path = aURL.Complete.copy( nIndex+1 );

            return true;

        }

        else

            return false;

    }

}

//  XURLTransformer

sal_Bool SAL_CALL URLTransformer::assemble( css::util::URL& aURL )

{

    // Initialize parser.

    INetURLObject aParser;

    if ( INetURLObject::CompareProtocolScheme( aURL.Protocol ) != INetProtocol::NotValid )

    {

        OUStringBuffer aCompletePath( aURL.Path );

        // Concat the name if it is provided, just support a final slash

        if ( !aURL.Name.isEmpty() )

        {

            sal_Int32 nIndex = aURL.Path.lastIndexOf( '/' );

            if ( nIndex == ( aURL.Path.getLength() -1 ))

                aCompletePath.append( aURL.Name );

            else

            {

                aCompletePath.append( "/" + aURL.Name );

            }

        }

        bool bResult = aParser.ConcatData(

                            INetURLObject::CompareProtocolScheme( aURL.Protocol )   ,

                             aURL.User                                              ,

                            aURL.Password                                           ,

                            aURL.Server                                             ,

                             aURL.Port                                              ,

                            aCompletePath);

        if ( !bResult )

            return false;

        // First parse URL WITHOUT ...

        aURL.Main = aParser.GetMainURL( INetURLObject::DecodeMechanism::NONE );

        // ...and then WITH parameter and mark.

        aParser.SetParam( aURL.Arguments);

        aParser.SetMark ( aURL.Mark, INetURLObject::EncodeMechanism::All );

        aURL.Complete = aParser.GetMainURL( INetURLObject::DecodeMechanism::NONE );

        // Return "URL is assembled".

        return true;

    }

    else if ( !aURL.Protocol.isEmpty() )

    {

        // Minimal support for unknown protocols

        aURL.Complete   = aURL.Protocol + aURL.Path;

        aURL.Main       = aURL.Complete;

        return true;

    }

    return false;

}

//  XURLTransformer

OUString SAL_CALL URLTransformer::getPresentation( const css::util::URL& aURL,

                                                            sal_Bool    bWithPassword   )

{

    // Safe impossible cases.

    if  ( aURL.Complete.isEmpty() )

    {

        return OUString();

    }

    // Check given URL

    css::util::URL aTestURL = aURL;

    bool bParseResult = parseSmart( aTestURL, aTestURL.Protocol );

    if ( bParseResult )

    {

        if ( !bWithPassword && !aTestURL.Password.isEmpty() )

        {

            // Exchange password text with other placeholder string

            aTestURL.Password = "<******>";

            assemble( aTestURL );

        }

        // Convert internal URLs to "praesentation"-URLs!

        OUString sPraesentationURL;

        INetURLObject::translateToExternal( aTestURL.Complete, sPraesentationURL, INetURLObject::DecodeMechanism::Unambiguous );

        return sPraesentationURL;

    }

    else

        return OUString();

}

}

extern "C" SAL_DLLPUBLIC_EXPORT css::uno::XInterface *

com_sun_star_comp_framework_URLTransformer_get_implementation(

    css::uno::XComponentContext *,

    css::uno::Sequence<css::uno::Any> const &)

{

    return cppu::acquire(new URLTransformer());

}

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