/* -*- 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 <ucbhelper/contentidentifier.hxx>
#include "webdavprovider.hxx"
#include "webdavcontent.hxx"

#include <osl/mutex.hxx>
#include <rtl/ustrbuf.hxx>
#include <comphelper/processfactory.hxx>
#include <com/sun/star/beans/NamedValue.hpp>
#include <com/sun/star/container/XNameAccess.hpp>
#include <com/sun/star/ucb/IllegalIdentifierException.hpp>

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


// ContentProvider Implementation.


ContentProvider::ContentProvider(
                const uno::Reference< uno::XComponentContext >& rContext )
: ::ucbhelper::ContentProviderImplHelper( rContext ),
  m_xDAVSessionFactory( new DAVSessionFactory )
{
}


// virtual
ContentProvider::~ContentProvider()
{}


// XInterface methods.
void SAL_CALL ContentProvider::acquire()
    throw()
{
    OWeakObject::acquire();
}

void SAL_CALL ContentProvider::release()
    throw()
{
    OWeakObject::release();
}

css::uno::Any SAL_CALL ContentProvider::queryInterface( const css::uno::Type & rType )
{
    css::uno::Any aRet = cppu::queryInterface( rType,
    static_cast< lang::XTypeProvider* >(this),
    static_cast< lang::XServiceInfo* >(this),
    static_cast< ucb::XContentProvider* >(this)
                    );
    return aRet.hasValue() ? aRet : OWeakObject::queryInterface( rType );
}

// XTypeProvider methods.


XTYPEPROVIDER_IMPL_3( ContentProvider,
                      lang::XTypeProvider,
                      lang::XServiceInfo,
                      ucb::XContentProvider );


// XServiceInfo methods.

XSERVICEINFO_COMMOM_IMPL( ContentProvider,
                          OUString( "com.sun.star.comp.WebDAVContentProvider" ) )
/// @throws css::uno::Exception
static css::uno::Reference< css::uno::XInterface > SAL_CALL
ContentProvider_CreateInstance( const css::uno::Reference< css::lang::XMultiServiceFactory> & rSMgr )
{
    css::lang::XServiceInfo* pX =
                static_cast<css::lang::XServiceInfo*>(new ContentProvider( ucbhelper::getComponentContext(rSMgr) ));
    return css::uno::Reference< css::uno::XInterface >::query( pX );
}

css::uno::Sequence< OUString >
ContentProvider::getSupportedServiceNames_Static()
{
    css::uno::Sequence< OUString > aSNS { WEBDAV_CONTENT_PROVIDER_SERVICE_NAME };
    return aSNS;
}

// Service factory implementation.


ONE_INSTANCE_SERVICE_FACTORY_IMPL( ContentProvider );


// XContentProvider methods.


// virtual
uno::Reference< ucb::XContent > SAL_CALL
ContentProvider::queryContent(
            const uno::Reference<
                    ucb::XContentIdentifier >& Identifier )
{
    // Check URL scheme...

    const OUString aScheme
        = Identifier->getContentProviderScheme().toAsciiLowerCase();
    if ( aScheme != HTTP_URL_SCHEME && aScheme != HTTPS_URL_SCHEME &&
         aScheme != WEBDAV_URL_SCHEME && aScheme != WEBDAVS_URL_SCHEME &&
         aScheme != DAV_URL_SCHEME && aScheme != DAVS_URL_SCHEME )
        throw ucb::IllegalIdentifierException();

    // Normalize URL and create new Id, if nessacary.
    OUString aURL = Identifier->getContentIdentifier();

    // At least: <scheme> + "://"
    if ( aURL.getLength() < ( aScheme.getLength() + 3 ) )
        throw ucb::IllegalIdentifierException();

    if ( !aURL.match("://", aScheme.getLength()) )
        throw ucb::IllegalIdentifierException();

    uno::Reference< ucb::XContentIdentifier > xCanonicId;

    bool bNewId = false;
    if ( aScheme == WEBDAV_URL_SCHEME )
    {
        aURL = aURL.replaceAt( 0,
                               WEBDAV_URL_SCHEME_LENGTH,
                               HTTP_URL_SCHEME );
        bNewId = true;
    }
    else if ( aScheme == WEBDAVS_URL_SCHEME )
    {
        aURL = aURL.replaceAt( 0,
                               WEBDAVS_URL_SCHEME_LENGTH,
                               HTTPS_URL_SCHEME );
        bNewId = true;
    }
    else if ( aScheme == DAV_URL_SCHEME )
    {
        aURL = aURL.replaceAt( 0,
                               DAV_URL_SCHEME_LENGTH,
                               HTTP_URL_SCHEME );
        bNewId = true;
    }
    else if ( aScheme == DAVS_URL_SCHEME )
    {
        aURL = aURL.replaceAt( 0,
                               DAVS_URL_SCHEME_LENGTH,
                               HTTPS_URL_SCHEME );
        bNewId = true;
    }

    sal_Int32 nPos = aURL.lastIndexOf( '/' );
    if ( nPos != aURL.getLength() - 1 )
    {
        // Find second slash in URL.
        nPos = aURL.indexOf( '/', aURL.indexOf( '/' ) + 1 );
        if ( nPos == -1 )
            throw ucb::IllegalIdentifierException();

        nPos = aURL.indexOf( '/', nPos + 1 );
        if ( nPos == -1 )
        {
            aURL += "/";
            bNewId = true;
        }
    }

    if ( bNewId )
        xCanonicId = new ::ucbhelper::ContentIdentifier( aURL );
    else
        xCanonicId = Identifier;

    osl::MutexGuard aGuard( m_aMutex );

    // Check, if a content with given id already exists...
    uno::Reference< ucb::XContent > xContent
        = queryExistingContent( xCanonicId ).get();
    if ( xContent.is() )
        return xContent;

    // Create a new content.

    try
    {
        xContent = new ::http_dav_ucp::Content(
                        m_xContext, this, xCanonicId, m_xDAVSessionFactory );
        registerNewContent( xContent );
    }
    catch ( ucb::ContentCreationException const & )
    {
        throw ucb::IllegalIdentifierException();
    }

    if ( !xContent->getIdentifier().is() )
        throw ucb::IllegalIdentifierException();

    return xContent;
}

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