/* -*- 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 .
 */


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

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

#include "hierarchyuri.hxx"

using namespace hierarchy_ucp;

constexpr OUStringLiteral HIERARCHY_URL_SCHEME = u"vnd.sun.star.hier";
constexpr OUStringLiteral DEFAULT_DATA_SOURCE_SERVICE =
                    u"com.sun.star.ucb.DefaultHierarchyDataSource";


// HierarchyUri Implementation.


void HierarchyUri::init() const
{
    // Already inited?
    if ( m_aUri.isEmpty() || !m_aPath.isEmpty() )
        return;

    // Note: Maybe it's a re-init, setUri only resets m_aPath!
    m_aService.clear();
    m_aParentUri.clear();

    // URI must match at least: <scheme>:
    if ( m_aUri.getLength() < HIERARCHY_URL_SCHEME.getLength() + 1 )
    {
        // error, but remember that we did an init().
        m_aPath = "/";
        return;
    }

    // Scheme is case insensitive.
    OUString aScheme
        = m_aUri.copy( 0, HIERARCHY_URL_SCHEME.getLength() ).toAsciiLowerCase();
    if ( aScheme == 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.getLength() + 1 )
        {
            // root folder URI without path and service specifier.
            m_aUri += "//" + DEFAULT_DATA_SOURCE_SERVICE + "/";
            m_aService = DEFAULT_DATA_SOURCE_SERVICE ;

            nPos = m_aUri.getLength() - 1;
        }
        else if ( ( m_aUri.getLength() == HIERARCHY_URL_SCHEME.getLength() + 2 )
                  &&
                  ( m_aUri[ HIERARCHY_URL_SCHEME.getLength() + 1 ] == '/' ) )
        {
            // root folder URI without service specifier.
            m_aUri += "/" + DEFAULT_DATA_SOURCE_SERVICE + "/";
            m_aService = DEFAULT_DATA_SOURCE_SERVICE;

            nPos = m_aUri.getLength() - 1;
        }
        else if ( ( m_aUri.getLength() > HIERARCHY_URL_SCHEME.getLength() + 2 )
                  &&
                  ( m_aUri[ HIERARCHY_URL_SCHEME.getLength() + 2 ] != '/' ) )
        {
            // other (no root folder) URI without service specifier.
            m_aUri = m_aUri.replaceAt(
                        HIERARCHY_URL_SCHEME.getLength() + 2,
                        0,
                        rtl::Concat2View("/" + DEFAULT_DATA_SOURCE_SERVICE + "/") );
            m_aService = DEFAULT_DATA_SOURCE_SERVICE;

            nPos
                = HIERARCHY_URL_SCHEME.getLength() + 3 + m_aService.getLength();
        }
        else
        {
            // URI with service specifier.
            sal_Int32 nStart = HIERARCHY_URL_SCHEME.getLength() + 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 an init().
                m_aPath = "/";
                return;
            }

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

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

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

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

            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 );
        }

        // success
        m_bValid = true;
    }
    else
    {
        // error, but remember that we did an init().
        m_aPath = "/";
    }
}

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