/**************************************************************
 * 
 * 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_ucb.hxx"

#include "rtl/uri.hxx"
#include "osl/mutex.hxx"
#include "cppuhelper/compbase2.hxx"
#include "cppuhelper/factory.hxx"
#include "cppuhelper/implementationentry.hxx"
#include "ucbhelper/content.hxx"
#include "com/sun/star/uno/XComponentContext.hpp"
#include "com/sun/star/lang/DisposedException.hpp"
#include "com/sun/star/lang/XServiceInfo.hpp"
#include "com/sun/star/lang/XMultiServiceFactory.hpp"
#include "com/sun/star/registry/XRegistryKey.hpp"
#include "com/sun/star/util/XMacroExpander.hpp"
#include "com/sun/star/ucb/XContentProvider.hpp"

#define EXPAND_PROTOCOL "vnd.sun.star.expand"
#define OUSTR(x) ::rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(x) )
#define ARLEN(x) sizeof (x) / sizeof *(x)


using namespace ::com::sun::star;
using ::rtl::OUString;

namespace
{

struct MutexHolder
{
    mutable ::osl::Mutex m_mutex;
};

typedef ::cppu::WeakComponentImplHelper2<
    lang::XServiceInfo, ucb::XContentProvider > t_impl_helper;

//==============================================================================
class ExpandContentProviderImpl : protected MutexHolder, public t_impl_helper
{
    uno::Reference< util::XMacroExpander > m_xMacroExpander;
    OUString expandUri(
        uno::Reference< ucb::XContentIdentifier > const & xIdentifier ) const;
    
protected:
    inline void check() const;
    virtual void SAL_CALL disposing();
    
public:
    inline ExpandContentProviderImpl(
        uno::Reference< uno::XComponentContext > const & xComponentContext )
        : t_impl_helper( m_mutex ),
          m_xMacroExpander(
              xComponentContext->getValueByName(
                  OUSTR("/singletons/com.sun.star.util.theMacroExpander") ),
              uno::UNO_QUERY_THROW )
        {}
    virtual ~ExpandContentProviderImpl() throw ();
    
    // XServiceInfo
    virtual OUString SAL_CALL getImplementationName()
        throw (uno::RuntimeException);
    virtual sal_Bool SAL_CALL supportsService( OUString const & serviceName )
        throw (uno::RuntimeException);
    virtual uno::Sequence< OUString > SAL_CALL getSupportedServiceNames()
        throw (uno::RuntimeException);
    
    // XContentProvider
    virtual uno::Reference< ucb::XContent > SAL_CALL queryContent(
        uno::Reference< ucb::XContentIdentifier > const & xIdentifier )
        throw (ucb::IllegalIdentifierException, uno::RuntimeException);
    virtual sal_Int32 SAL_CALL compareContentIds(
        uno::Reference< ucb::XContentIdentifier > const & xId1,
        uno::Reference< ucb::XContentIdentifier > const & xId2 )
        throw (uno::RuntimeException);
};

//______________________________________________________________________________
inline void ExpandContentProviderImpl::check() const
{
    // xxx todo guard?
//     MutexGuard guard( m_mutex );
    if (rBHelper.bInDispose || rBHelper.bDisposed)
    {
        throw lang::DisposedException(
            OUSTR("expand content provider instance has "
                  "already been disposed!"),
            static_cast< OWeakObject * >(
                const_cast< ExpandContentProviderImpl * >(this) ) );
    }
}

//______________________________________________________________________________
ExpandContentProviderImpl::~ExpandContentProviderImpl() throw ()
{
}

//______________________________________________________________________________
void ExpandContentProviderImpl::disposing()
{
}

//==============================================================================
static uno::Reference< uno::XInterface > SAL_CALL create(
    uno::Reference< uno::XComponentContext > const & xComponentContext )
    SAL_THROW( (uno::Exception) )
{
    return static_cast< ::cppu::OWeakObject * >(
        new ExpandContentProviderImpl( xComponentContext ) );
}

//==============================================================================
static OUString SAL_CALL implName()
{
    return OUSTR("com.sun.star.comp.ucb.ExpandContentProvider");
}

//==============================================================================
static uno::Sequence< OUString > SAL_CALL supportedServices()
{
    OUString names [] = {
        OUSTR("com.sun.star.ucb.ExpandContentProvider"),
        OUSTR("com.sun.star.ucb.ContentProvider")
    };
    return uno::Sequence< OUString >( names, ARLEN(names) );
}

// XServiceInfo
//______________________________________________________________________________
OUString ExpandContentProviderImpl::getImplementationName()
    throw (uno::RuntimeException)
{
    check();
    return implName();
}

//______________________________________________________________________________
uno::Sequence< OUString > ExpandContentProviderImpl::getSupportedServiceNames()
    throw (uno::RuntimeException)
{
    check();
    return supportedServices();
}

//______________________________________________________________________________
sal_Bool ExpandContentProviderImpl::supportsService(
    OUString const & serviceName )
    throw (uno::RuntimeException)
{
//     check();
    uno::Sequence< OUString > supported_services( getSupportedServiceNames() );
    OUString const * ar = supported_services.getConstArray();
    for ( sal_Int32 pos = supported_services.getLength(); pos--; )
    {
        if (ar[ pos ].equals( serviceName ))
            return true;
    }
    return false;
}

//______________________________________________________________________________
OUString ExpandContentProviderImpl::expandUri(
    uno::Reference< ucb::XContentIdentifier > const & xIdentifier ) const
{
    OUString uri( xIdentifier->getContentIdentifier() );
    if (uri.compareToAscii(
            RTL_CONSTASCII_STRINGPARAM(EXPAND_PROTOCOL ":") ) != 0)
    {
        throw ucb::IllegalIdentifierException(
            OUSTR("expected protocol " EXPAND_PROTOCOL "!"),
            static_cast< OWeakObject * >(
                const_cast< ExpandContentProviderImpl * >(this) ) );
    }
    // cut protocol
    OUString str( uri.copy( sizeof (EXPAND_PROTOCOL ":") -1 ) );
    // decode uric class chars
    str = ::rtl::Uri::decode(
        str, rtl_UriDecodeWithCharset, RTL_TEXTENCODING_UTF8 );
    // expand macro string
    return m_xMacroExpander->expandMacros( str );
}

// XContentProvider
//______________________________________________________________________________
uno::Reference< ucb::XContent > ExpandContentProviderImpl::queryContent(
    uno::Reference< ucb::XContentIdentifier > const & xIdentifier )
    throw (ucb::IllegalIdentifierException, uno::RuntimeException)
{
    check();
    OUString uri( expandUri( xIdentifier ) );
    
    ::ucbhelper::Content ucb_content;
    if (::ucbhelper::Content::create(
            uri, uno::Reference< ucb::XCommandEnvironment >(), ucb_content ))
    {
        return ucb_content.get();
    }
    else
    {
        return uno::Reference< ucb::XContent >();
    }
}

//______________________________________________________________________________
sal_Int32 ExpandContentProviderImpl::compareContentIds(
    uno::Reference< ucb::XContentIdentifier > const & xId1,
    uno::Reference< ucb::XContentIdentifier > const & xId2 )
    throw (uno::RuntimeException)
{
    check();
    try
    {
        OUString uri1( expandUri( xId1 ) );
        OUString uri2( expandUri( xId2 ) );
        return uri1.compareTo( uri2 );
    }
    catch (ucb::IllegalIdentifierException & exc)
    {
        (void) exc; // unused
        OSL_ENSURE(
            0, ::rtl::OUStringToOString(
                exc.Message, RTL_TEXTENCODING_UTF8 ).getStr() );
        return -1;
    }
}

static const ::cppu::ImplementationEntry s_entries [] =
{
	{
		create,
        implName,
		supportedServices,
        ::cppu::createSingleComponentFactory,
		0, 0
	},
	{ 0, 0, 0, 0, 0, 0 }
};

}

extern "C"
{

void SAL_CALL component_getImplementationEnvironment(
	const sal_Char ** ppEnvTypeName, uno_Environment ** )
{
	*ppEnvTypeName = CPPU_CURRENT_LANGUAGE_BINDING_NAME;
}

void * SAL_CALL component_getFactory(
	const sal_Char * pImplName,
    lang::XMultiServiceFactory * pServiceManager,
    registry::XRegistryKey * pRegistryKey )
{
	return ::cppu::component_getFactoryHelper(
        pImplName, pServiceManager, pRegistryKey, s_entries );
}

}