/******************************************************************************
 *
 * Project:  KML Driver
 * Purpose:  Implementation of OGRKMLDriver class.
 * Author:   Christopher Condit, condit@sdsc.edu;
 *           Jens Oberender, j.obi@troja.net
 *
 ******************************************************************************
 * Copyright (c) 2006, Christopher Condit
 *               2007, Jens Oberender
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 ****************************************************************************/

#include "cpl_port.h"
#include "ogr_kml.h"

#include <cstring>

#include "cpl_conv.h"
#include "cpl_error.h"
#include "gdal.h"
#include "gdal_priv.h"

CPL_CVSID("$Id: ogrkmldriver.cpp 1761acd90777d5bcc49eddbc13c193098f0ed40b 2020-10-01 12:12:00 +0200 Even Rouault $")

/************************************************************************/
/*                         OGRKMLDriverIdentify()                       */
/************************************************************************/

static int OGRKMLDriverIdentify( GDALOpenInfo* poOpenInfo )

{
    if( poOpenInfo->fpL == nullptr )
        return FALSE;

    return strstr(reinterpret_cast<char *>(poOpenInfo->pabyHeader),
                  "<kml") != nullptr ||
           strstr(reinterpret_cast<char *>(poOpenInfo->pabyHeader),
                  "<kml:kml") != nullptr;
}

/************************************************************************/
/*                                Open()                                */
/************************************************************************/

static GDALDataset *OGRKMLDriverOpen( GDALOpenInfo* poOpenInfo )

{
    if( poOpenInfo->eAccess == GA_Update )
        return nullptr;

    if( !OGRKMLDriverIdentify(poOpenInfo) )
        return nullptr;

#ifdef HAVE_EXPAT
    OGRKMLDataSource* poDS = new OGRKMLDataSource();

    if( poDS->Open( poOpenInfo->pszFilename, TRUE ) )
    {
#ifdef DEBUG_VERBOSE
        if( poDS->GetLayerCount() == 0 )
        {
            CPLError( CE_Failure, CPLE_OpenFailed,
                "No layers in KML file: %s.", poOpenInfo->pszFilename );

            delete poDS;
            poDS = nullptr;
        }
#endif
    }
    else
    {
        delete poDS;
        poDS = nullptr;
    }

    return poDS;
#else
    return nullptr;
#endif
}

/************************************************************************/
/*                               Create()                               */
/************************************************************************/

static GDALDataset *OGRKMLDriverCreate( const char * pszName,
                                        int /* nBands */,
                                        int /* nXSize */ ,
                                        int /* nYSize */,
                                        GDALDataType /* eDT */,
                                        char **papszOptions )
{
    CPLAssert( nullptr != pszName );
    CPLDebug( "KML", "Attempt to create: %s", pszName );

    OGRKMLDataSource *poDS = new OGRKMLDataSource();

    if( !poDS->Create( pszName, papszOptions ) )
    {
        delete poDS;
        poDS = nullptr;
    }

    return poDS;
}

/************************************************************************/
/*                           RegisterOGRKML()                           */
/************************************************************************/

void RegisterOGRKML()
{
    if( GDALGetDriverByName( "KML" ) != nullptr )
        return;

    GDALDriver *poDriver = new GDALDriver();

    poDriver->SetDescription( "KML" );
    poDriver->SetMetadataItem( GDAL_DCAP_VECTOR, "YES" );
    poDriver->SetMetadataItem( GDAL_DMD_LONGNAME,
                               "Keyhole Markup Language (KML)" );
    poDriver->SetMetadataItem( GDAL_DMD_EXTENSION, "kml" );
    poDriver->SetMetadataItem( GDAL_DMD_HELPTOPIC, "drivers/vector/kml.html" );

    poDriver->SetMetadataItem( GDAL_DMD_CREATIONOPTIONLIST,
"<CreationOptionList>"
"  <Option name='DOCUMENT_ID' type='string' description='Id of the root &lt;Document&gt; node' default='root_doc'/>"
"  <Option name='GPX_USE_EXTENSIONS' type='boolean' description='Whether to write non-GPX attributes in an &lt;extensions&gt; tag' default='NO'/>"
"  <Option name='NameField' type='string' description='Field to use to fill the KML &lt;name&gt; element' default='Name'/>"
"  <Option name='DescriptionField' type='string' description='Field to use to fill the KML &lt;description&gt; element' default='Description'/>"
"  <Option name='AltitudeMode' type='string-select' description='Value of the &lt;AltitudeMode&gt; element for 3D geometries'>"
"    <Value>clampToGround</Value>"
"    <Value>relativeToGround</Value>"
"    <Value>absolute</Value>"
"  </Option>"
"</CreationOptionList>");

    poDriver->SetMetadataItem( GDAL_DS_LAYER_CREATIONOPTIONLIST,
                               "<LayerCreationOptionList/>" );
    poDriver->SetMetadataItem( GDAL_DCAP_VIRTUALIO, "YES" );
    poDriver->SetMetadataItem( GDAL_DMD_CREATIONFIELDDATATYPES,
                               "Integer Real String" );
    poDriver->SetMetadataItem( GDAL_DCAP_FEATURE_STYLES, "YES" );

    poDriver->pfnOpen = OGRKMLDriverOpen;
    poDriver->pfnIdentify = OGRKMLDriverIdentify;
    poDriver->pfnCreate = OGRKMLDriverCreate;

    GetGDALDriverManager()->RegisterDriver( poDriver );
}
