qgsalgorithmrepairshapefile.cpp

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/***************************************************************************
                         qgsalgorithmrepairshapefile.cpp
                         ---------------------
    begin                : December 2019
    copyright            : (C) 2019 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#include "qgsalgorithmrepairshapefile.h"
#include "qgsvectorlayer.h"
#include "qgsvectordataprovider.h"
#include "cpl_conv.h"
 
 
QString QgsRepairShapefileAlgorithm::name() const
{
  return QStringLiteral( "repairshapefile" );
}
 
QString QgsRepairShapefileAlgorithm::displayName() const
{
  return QObject::tr( "Repair Shapefile" );
}
 
QStringList QgsRepairShapefileAlgorithm::tags() const
{
  return QObject::tr( "fix,shp,shx,broken,missing" ).split( ',' );
}
 
QString QgsRepairShapefileAlgorithm::group() const
{
  return QObject::tr( "Vector general" );
}
 
QString QgsRepairShapefileAlgorithm::groupId() const
{
  return QStringLiteral( "vectorgeneral" );
}
 
QString QgsRepairShapefileAlgorithm::shortHelpString() const
{
  return QObject::tr( "Repairs a broken Shapefile by recreating missing or broken SHX files." );
}
 
QString QgsRepairShapefileAlgorithm::shortDescription() const
{
  return QObject::tr( "Repairs broken Shapefiles by recreating SHX files." );
}
 
QgsRepairShapefileAlgorithm *QgsRepairShapefileAlgorithm::createInstance() const
{
  return new QgsRepairShapefileAlgorithm();
}
 
void QgsRepairShapefileAlgorithm::initAlgorithm( const QVariantMap & )
{
  addParameter( new QgsProcessingParameterFile( QStringLiteral( "INPUT" ), QObject::tr( "Input Shapefile" ), QgsProcessingParameterFile::File,
                QStringLiteral( "shp" ), QVariant(), false, QObject::tr( "ESRI Shapefile" ) +
                QStringLiteral( " (*.shp *.SHP)" ) ) );
 
  addOutput( new QgsProcessingOutputVectorLayer( QStringLiteral( "OUTPUT" ), QObject::tr( "Repaired layer" ) ) );
}
 
QVariantMap QgsRepairShapefileAlgorithm::processAlgorithm( const QVariantMap &parameters, QgsProcessingContext &context, QgsProcessingFeedback *feedback )
{
  const QString path = parameterAsFile( parameters, QStringLiteral( "INPUT" ), context );
 
  if ( !QFile::exists( path ) )
    throw QgsProcessingException( QObject::tr( "Could not load source layer for %1." ).arg( QLatin1String( "INPUT" ) ) );
 
  CPLSetConfigOption( "SHAPE_RESTORE_SHX", "YES" );
 
  std::unique_ptr< QgsVectorLayer > layer = std::make_unique< QgsVectorLayer >( path );
  if ( !layer->isValid() )
  {
    CPLSetConfigOption( "SHAPE_RESTORE_SHX", nullptr );
    throw QgsProcessingException( QObject::tr( "Could not repair %1." ).arg( path ) );
  }
 
  CPLSetConfigOption( "SHAPE_RESTORE_SHX", nullptr );
 
  feedback->pushInfo( QObject::tr( "Successfully repaired, found %n feature(s)", nullptr, layer->featureCount() ) );
 
  QVariantMap outputs;
  outputs.insert( QStringLiteral( "OUTPUT" ), path );
  return outputs;
}