/**************************************************************
 * 
 * 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
 * 
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 * 
 *************************************************************/



// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_pkg.hxx"

/**************************************************************************
								TODO
 **************************************************************************

 *************************************************************************/

#include <vector>
#include <osl/diagnose.h>
#include <com/sun/star/container/XEnumeration.hpp>
#include <com/sun/star/container/XNamed.hpp>
#include <ucbhelper/contentidentifier.hxx>
#include <ucbhelper/providerhelper.hxx>
#include "pkgdatasupplier.hxx"
#include "pkgcontent.hxx"
#include "pkgprovider.hxx"

#include "../inc/urihelper.hxx"

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

namespace package_ucp
{

//=========================================================================
//
// struct ResultListEntry.
//
//=========================================================================

struct ResultListEntry
{
    rtl::OUString                             aURL;
    uno::Reference< ucb::XContentIdentifier > xId;
    uno::Reference< ucb::XContent >           xContent;
    uno::Reference< sdbc::XRow >              xRow;

    ResultListEntry( const rtl::OUString& rURL ) : aURL( rURL ) {}
};

//=========================================================================
//
// ResultList.
//
//=========================================================================

typedef std::vector< ResultListEntry* > ResultList;

//=========================================================================
//
// struct DataSupplier_Impl.
//
//=========================================================================

struct DataSupplier_Impl
{
    osl::Mutex                                   m_aMutex;
    ResultList                                   m_aResults;
    rtl::Reference< Content >                    m_xContent;
    uno::Reference< lang::XMultiServiceFactory > m_xSMgr;
    uno::Reference< container::XEnumeration >    m_xFolderEnum;
    sal_Int32                                    m_nOpenMode;
    sal_Bool                                     m_bCountFinal;
    sal_Bool                                     m_bThrowException;

    DataSupplier_Impl(
            const uno::Reference< lang::XMultiServiceFactory >& rxSMgr,
            const rtl::Reference< Content >& rContent,
            sal_Int32 nOpenMode )
	: m_xContent( rContent ), m_xSMgr( rxSMgr ),
      m_xFolderEnum( rContent->getIterator() ), m_nOpenMode( nOpenMode ),
      m_bCountFinal( !m_xFolderEnum.is() ), m_bThrowException( m_bCountFinal )
    {}
	~DataSupplier_Impl();
};

//=========================================================================
DataSupplier_Impl::~DataSupplier_Impl()
{
	ResultList::const_iterator it  = m_aResults.begin();
	ResultList::const_iterator end = m_aResults.end();

	while ( it != end )
	{
		delete (*it);
		it++;
	}
}

}

//=========================================================================
//=========================================================================
//
// DataSupplier Implementation.
//
//=========================================================================
//=========================================================================

DataSupplier::DataSupplier(
                const uno::Reference< lang::XMultiServiceFactory >& rxSMgr,
                const rtl::Reference< Content >& rContent,
                sal_Int32 nOpenMode )
: m_pImpl( new DataSupplier_Impl( rxSMgr, rContent, nOpenMode ) )
{
}

//=========================================================================
// virtual
DataSupplier::~DataSupplier()
{
	delete m_pImpl;
}

//=========================================================================
// virtual
rtl::OUString DataSupplier::queryContentIdentifierString( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
        rtl::OUString aId = m_pImpl->m_aResults[ nIndex ]->aURL;
		if ( aId.getLength() )
		{
			// Already cached.
			return aId;
		}
	}

	if ( getResult( nIndex ) )
	{
		// Note: getResult fills m_pImpl->m_aResults[ nIndex ]->aURL.
		return m_pImpl->m_aResults[ nIndex ]->aURL;
	}
    return rtl::OUString();
}

//=========================================================================
// virtual
uno::Reference< ucb::XContentIdentifier >
DataSupplier::queryContentIdentifier( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
        uno::Reference< ucb::XContentIdentifier > xId
								= m_pImpl->m_aResults[ nIndex ]->xId;
		if ( xId.is() )
		{
			// Already cached.
			return xId;
		}
	}

    rtl::OUString aId = queryContentIdentifierString( nIndex );
	if ( aId.getLength() )
	{
        uno::Reference< ucb::XContentIdentifier > xId
            = new ::ucbhelper::ContentIdentifier( aId );
		m_pImpl->m_aResults[ nIndex ]->xId = xId;
		return xId;
	}
    return uno::Reference< ucb::XContentIdentifier >();
}

//=========================================================================
// virtual
uno::Reference< ucb::XContent > DataSupplier::queryContent(
                                                        sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
        uno::Reference< ucb::XContent > xContent
								= m_pImpl->m_aResults[ nIndex ]->xContent;
		if ( xContent.is() )
		{
			// Already cached.
			return xContent;
		}
	}

    uno::Reference< ucb::XContentIdentifier > xId
        = queryContentIdentifier( nIndex );
	if ( xId.is() )
	{
		try
		{
            uno::Reference< ucb::XContent > xContent
				= m_pImpl->m_xContent->getProvider()->queryContent( xId );
			m_pImpl->m_aResults[ nIndex ]->xContent = xContent;
			return xContent;

		}
        catch ( ucb::IllegalIdentifierException const & )
		{
		}
	}
    return uno::Reference< ucb::XContent >();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::getResult( sal_uInt32 nIndex )
{
	osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( m_pImpl->m_aResults.size() > nIndex )
	{
		// Result already present.
		return sal_True;
	}

	// Result not (yet) present.

	if ( m_pImpl->m_bCountFinal )
		return sal_False;

	// Try to obtain result...

	sal_uInt32 nOldCount = m_pImpl->m_aResults.size();
	sal_Bool bFound = sal_False;
	sal_uInt32 nPos = nOldCount;

	while ( m_pImpl->m_xFolderEnum->hasMoreElements() )
	{
		try
		{
            uno::Reference< container::XNamed > xNamed;
			m_pImpl->m_xFolderEnum->nextElement() >>= xNamed;

			if ( !xNamed.is() )
			{
                OSL_ENSURE( sal_False,
							"DataSupplier::getResult - Got no XNamed!" );
				break;
			}

            rtl::OUString aName = xNamed->getName();

			if ( !aName.getLength() )
			{
                OSL_ENSURE( sal_False,
							"DataSupplier::getResult - Empty name!" );
				break;
			}

			// Assemble URL for child.
			rtl::OUString aURL = assembleChildURL( aName );

			m_pImpl->m_aResults.push_back( new ResultListEntry( aURL ) );

			if ( nPos == nIndex )
			{
				// Result obtained.
				bFound = sal_True;
				break;
			}

			nPos++;
		}
        catch ( container::NoSuchElementException const & )
		{
            m_pImpl->m_bThrowException = sal_True;
			break;
		}
        catch ( lang::WrappedTargetException const & )
		{
            m_pImpl->m_bThrowException = sal_True;
			break;
		}
	}

	if ( !bFound )
		m_pImpl->m_bCountFinal = sal_True;

    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet().get();
    if ( xResultSet.is() )
	{
		// Callbacks follow!
		aGuard.clear();

		if ( nOldCount < m_pImpl->m_aResults.size() )
			xResultSet->rowCountChanged(
									nOldCount, m_pImpl->m_aResults.size() );

		if ( m_pImpl->m_bCountFinal )
			xResultSet->rowCountFinal();
	}

	return bFound;
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::totalCount()
{
	osl::ClearableGuard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( m_pImpl->m_bCountFinal )
		return m_pImpl->m_aResults.size();

	sal_uInt32 nOldCount = m_pImpl->m_aResults.size();

	while ( m_pImpl->m_xFolderEnum->hasMoreElements() )
	{
		try
		{
            uno::Reference< container::XNamed > xNamed;
			m_pImpl->m_xFolderEnum->nextElement() >>= xNamed;

			if ( !xNamed.is() )
			{
                OSL_ENSURE( sal_False,
							"DataSupplier::getResult - Got no XNamed!" );
				break;
			}

            rtl::OUString aName = xNamed->getName();

			if ( !aName.getLength() )
			{
                OSL_ENSURE( sal_False,
							"DataSupplier::getResult - Empty name!" );
				break;
			}

			// Assemble URL for child.
			rtl::OUString aURL = assembleChildURL( aName );

			m_pImpl->m_aResults.push_back( new ResultListEntry( aURL ) );
		}
        catch ( container::NoSuchElementException const & )
		{
            m_pImpl->m_bThrowException = sal_True;
			break;
		}
        catch ( lang::WrappedTargetException const & )
		{
            m_pImpl->m_bThrowException = sal_True;
			break;
		}
	}

	m_pImpl->m_bCountFinal = sal_True;

    rtl::Reference< ::ucbhelper::ResultSet > xResultSet = getResultSet().get();
    if ( xResultSet.is() )
	{
		// Callbacks follow!
		aGuard.clear();

		if ( nOldCount < m_pImpl->m_aResults.size() )
			xResultSet->rowCountChanged(
									nOldCount, m_pImpl->m_aResults.size() );

		xResultSet->rowCountFinal();
	}

	return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_uInt32 DataSupplier::currentCount()
{
	return m_pImpl->m_aResults.size();
}

//=========================================================================
// virtual
sal_Bool DataSupplier::isCountFinal()
{
	return m_pImpl->m_bCountFinal;
}

//=========================================================================
// virtual
uno::Reference< sdbc::XRow > DataSupplier::queryPropertyValues(
                                                        sal_uInt32 nIndex  )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
	{
        uno::Reference< sdbc::XRow > xRow = m_pImpl->m_aResults[ nIndex ]->xRow;
		if ( xRow.is() )
		{
			// Already cached.
			return xRow;
		}
	}

	if ( getResult( nIndex ) )
	{
        uno::Reference< sdbc::XRow > xRow = Content::getPropertyValues(
						m_pImpl->m_xSMgr,
						getResultSet()->getProperties(),
						static_cast< ContentProvider * >(
							m_pImpl->m_xContent->getProvider().get() ),
						queryContentIdentifierString( nIndex ) );
		m_pImpl->m_aResults[ nIndex ]->xRow = xRow;
		return xRow;
	}

    return uno::Reference< sdbc::XRow >();
}

//=========================================================================
// virtual
void DataSupplier::releasePropertyValues( sal_uInt32 nIndex )
{
	osl::Guard< osl::Mutex > aGuard( m_pImpl->m_aMutex );

	if ( nIndex < m_pImpl->m_aResults.size() )
        m_pImpl->m_aResults[ nIndex ]->xRow = uno::Reference< sdbc::XRow >();
}

//=========================================================================
// virtual
void DataSupplier::close()
{
}

//=========================================================================
// virtual
void DataSupplier::validate()
    throw( ucb::ResultSetException )
{
    if ( m_pImpl->m_bThrowException )
        throw ucb::ResultSetException();
}

//=========================================================================
::rtl::OUString DataSupplier::assembleChildURL( const ::rtl::OUString& aName )
{
	rtl::OUString aURL;
	rtl::OUString aContURL 
        = m_pImpl->m_xContent->getIdentifier()->getContentIdentifier();
	sal_Int32 nParam = aContURL.indexOf( '?' );
	if ( nParam >= 0 )
	{
		aURL = aContURL.copy( 0, nParam );

		sal_Int32 nPackageUrlEnd = aURL.lastIndexOf( '/' );
		if ( nPackageUrlEnd != aURL.getLength() - 1 )
			aURL += rtl::OUString::createFromAscii( "/" );

		aURL += ::ucb_impl::urihelper::encodeSegment( aName );
		aURL += aContURL.copy( nParam );
	}
	else
	{
		aURL = aContURL;

		sal_Int32 nPackageUrlEnd = aURL.lastIndexOf( '/' );
		if ( nPackageUrlEnd != aURL.getLength() - 1 )
			aURL += rtl::OUString::createFromAscii( "/" );

		aURL += ::ucb_impl::urihelper::encodeSegment( aName );
	}	
	return aURL;
}