/**************************************************************
 * 
 * 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"

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

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

#include "rtl/ustrbuf.hxx"
#include "osl/diagnose.h"

#include "hierarchyuri.hxx"

using namespace hierarchy_ucp;

//=========================================================================

#define DEFAULT_DATA_SOURCE_SERVICE \
                    "com.sun.star.ucb.DefaultHierarchyDataSource"

//=========================================================================
//=========================================================================
//
// HierarchyUri Implementation.
//
//=========================================================================
//=========================================================================

void HierarchyUri::init() const
{
    // Already inited?
    if ( m_aUri.getLength() && !m_aPath.getLength() )
    {
        // Note: Maybe it's a re-init, setUri only resets m_aPath!
        m_aService = m_aParentUri = m_aName = rtl::OUString();

        // URI must match at least: <sheme>:
        if ( ( m_aUri.getLength() < HIERARCHY_URL_SCHEME_LENGTH + 1 ) )
        {
            // error, but remember that we did a init().
            m_aPath = rtl::OUString::createFromAscii( "/" );
            return;
        }

        // Scheme is case insensitive.
        rtl::OUString aScheme
            = m_aUri.copy( 0, HIERARCHY_URL_SCHEME_LENGTH ).toAsciiLowerCase();
        if ( aScheme.equalsAsciiL(
                RTL_CONSTASCII_STRINGPARAM( HIERARCHY_URL_SCHEME ) ) )
        {
            m_aUri = m_aUri.replaceAt( 0, aScheme.getLength(), aScheme );

            sal_Int32 nPos = 0;

            // If the URI has no service specifier, insert default service.
            // This is for backward compatibility and for convenience.

            if ( m_aUri.getLength() == HIERARCHY_URL_SCHEME_LENGTH + 1 )
            {
                // root folder URI without path and service specifier.
                m_aUri += rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                "//" DEFAULT_DATA_SOURCE_SERVICE "/" ) );
                m_aService
                    = rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                            DEFAULT_DATA_SOURCE_SERVICE ) );

                nPos = m_aUri.getLength() - 1;
            }
            else if ( ( m_aUri.getLength() == HIERARCHY_URL_SCHEME_LENGTH + 2 )
                      &&
                      ( m_aUri.getStr()[ HIERARCHY_URL_SCHEME_LENGTH + 1 ]
                                                    == sal_Unicode( '/' ) ) )
            {
                // root folder URI without service specifier.
                m_aUri += rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                "/" DEFAULT_DATA_SOURCE_SERVICE "/" ) );
                m_aService
                    = rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                            DEFAULT_DATA_SOURCE_SERVICE ) );

                nPos = m_aUri.getLength() - 1;
            }
            else if ( ( m_aUri.getLength() > HIERARCHY_URL_SCHEME_LENGTH + 2 )
                      &&
                      ( m_aUri.getStr()[ HIERARCHY_URL_SCHEME_LENGTH + 2 ]
                                                    != sal_Unicode( '/' ) ) )
            {
                // other (no root folder) URI without service specifier.
                m_aUri = m_aUri.replaceAt(
                            HIERARCHY_URL_SCHEME_LENGTH + 2,
                            0,
                            rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                "/" DEFAULT_DATA_SOURCE_SERVICE "/" ) ) );
                m_aService
                    = rtl::OUString( RTL_CONSTASCII_USTRINGPARAM(
                                            DEFAULT_DATA_SOURCE_SERVICE ) );

                nPos 
                    = HIERARCHY_URL_SCHEME_LENGTH + 3 + m_aService.getLength();
            }
            else
            {
                // URI with service specifier.
                sal_Int32 nStart = HIERARCHY_URL_SCHEME_LENGTH + 3;

                // Here: - m_aUri has at least the form "<scheme>://"
                //       - nStart points to char after <scheme>://

                // Only <scheme>:// ?
                if ( nStart == m_aUri.getLength() )
                {
                    // error, but remember that we did a init().
                    m_aPath = rtl::OUString::createFromAscii( "/" );
                    return;
                }

                // Empty path segments?
                if ( m_aUri.indexOf(
                        rtl::OUString::createFromAscii( "//" ), 
                        nStart ) != -1 )
                {
                    // error, but remember that we did a init().
                    m_aPath = rtl::OUString::createFromAscii( "/" );
                    return;
                }

                sal_Int32 nEnd = m_aUri.indexOf( '/', nStart );

                // Only <scheme>:/// ?
                if ( nEnd == nStart )
                {
                    // error, but remember that we did a init().
                    m_aPath = rtl::OUString::createFromAscii( "/" );
                    return;
                }

                if ( nEnd == -1 )
                {
                    // Trailing slash missing.
                    nEnd = m_aUri.getLength();
                    m_aUri += rtl::OUString::createFromAscii( "/" );
                }

                m_aService = m_aUri.copy( nStart, nEnd - nStart );

                nPos = nEnd;
            }

            // Here: - m_aUri has at least the form "<scheme>://<service>/"
            //       - m_aService was set
            //       - m_aPath, m_aParentPath, m_aName not yet set
            //       - nPos points to slash after service specifier

            // Remove trailing slash, if not a root folder URI.
            sal_Int32 nEnd = m_aUri.lastIndexOf( '/' );
            if ( ( nEnd > nPos ) && ( nEnd == ( m_aUri.getLength() - 1 ) ) )
                m_aUri = m_aUri.copy( 0, nEnd );

            // Path (includes leading slash)
            m_aPath = m_aUri.copy( nPos );

            // parent URI + name
            sal_Int32 nLastSlash = m_aUri.lastIndexOf( '/' );
            if ( ( nLastSlash != -1 ) &&
                 ( nLastSlash != m_aUri.getLength() - 1 ) ) // root
            {
                m_aParentUri = m_aUri.copy( 0, nLastSlash );
                m_aName      = m_aUri.copy( nLastSlash + 1 );
            }

            // success
            m_bValid = true;
        }
        else
        {
            // error, but remember that we did a init().
            m_aPath = rtl::OUString::createFromAscii( "/" );
        }
    }
}