#include "qgshandlebadlayers.h"

#include "qgisapp.h"

#include "qgsauthconfigselect.h"

#include "qgsdataprovider.h"

#include "qgsguiutils.h"

#include "qgsdatasourceuri.h"

#include "qgslogger.h"

#include "qgsrasterlayer.h"

#include "qgsproviderregistry.h"

#include "qgsmessagebar.h"

#include "qgssettings.h"

#include "qgslayertreeregistrybridge.h"

#include "qgsapplication.h"

#include <QDomDocument>

#include <QDomElement>

#include <QFileDialog>

#include <QPushButton>

#include <QToolButton>

#include <QMessageBox>

#include <QDialogButtonBox>

#include <QUrl>

void QgsHandleBadLayersHandler::handleBadLayers( const QList<QDomNode> &layers )

{

QApplication::setOverrideCursor( Qt::ArrowCursor );

QgsHandleBadLayers *dialog = new QgsHandleBadLayers( layers );

dialog->buttonBox->button( QDialogButtonBox::Ignore )->setToolTip( tr( "Import all unavailable layers unmodified (you can fix them later)." ) );

dialog->buttonBox->button( QDialogButtonBox::Ignore )->setText( tr( "Keep Unavailable Layers" ) );

dialog->buttonBox->button( QDialogButtonBox::Discard )->setToolTip( tr( "Remove all unavailable layers from the project" ) );

dialog->buttonBox->button( QDialogButtonBox::Discard )->setText( tr( "Remove Unavailable Layers" ) );

dialog->buttonBox->button( QDialogButtonBox::Discard )->setIcon( QgsApplication::getThemeIcon( QStringLiteral( "/mActionDeleteSelected.svg" ) ) );

if ( dialog->layerCount() < layers.size() )

QgisApp::instance()->messageBar()->pushMessage(

tr( "Handle unavailable layers" ),

tr( "%1 of %2 unavailable layers were not fixable." )

.arg( layers.size() - dialog->layerCount() )

.arg( layers.size() ),

Qgis::Warning, QgisApp::instance()->messageTimeout() );

if ( dialog->layerCount() > 0 )

{

if ( dialog->exec() == dialog->Accepted )

{

emit layersChanged();

}

}

delete dialog;

QApplication::restoreOverrideCursor();

}

QgsHandleBadLayers::QgsHandleBadLayers( const QList<QDomNode> &layers )

: QDialog( QgisApp::instance() )

, mLayers( layers )

{

setupUi( this );

mVectorFileFilter = QgsProviderRegistry::instance()->fileVectorFilters();

mRasterFileFilter = QgsProviderRegistry::instance()->fileRasterFilters();

mBrowseButton = new QPushButton( tr( "Browse" ) );

buttonBox->addButton( mBrowseButton, QDialogButtonBox::ActionRole );

mBrowseButton->setDisabled( true );

mApplyButton = new QPushButton( tr( "Apply Changes" ) );

mApplyButton->setToolTip( tr( "Apply fixes to unavailable layers (remaining unavailable layers will be removed from the project)." ) );

buttonBox->addButton( mApplyButton, QDialogButtonBox::ActionRole );

connect( mLayerList, &QTableWidget::itemSelectionChanged, this, &QgsHandleBadLayers::selectionChanged );

connect( mBrowseButton, &QAbstractButton::clicked, this, &QgsHandleBadLayers::browseClicked );

connect( mApplyButton, &QAbstractButton::clicked, this, &QgsHandleBadLayers::apply );

connect( buttonBox->button( QDialogButtonBox::Ignore ), &QPushButton::clicked, this, &QgsHandleBadLayers::reject );

connect( buttonBox->button( QDialogButtonBox::Discard ), &QPushButton::clicked, this, &QgsHandleBadLayers::accept );

mLayerList->clear();

mLayerList->setSortingEnabled( true );

mLayerList->setSelectionBehavior( QAbstractItemView::SelectRows );

mLayerList->setColumnCount( 5 );

mLayerList->setColumnWidth( 3, 75 );

mLayerList->setHorizontalHeaderLabels( QStringList()

<< tr( "Layer name" )

<< tr( "Type" )

<< tr( "Provider" )

<< tr( "Auth config" )

<< tr( "Datasource" )

);

int j = 0;

for ( int i = 0; i < mLayers.size(); i++ )

{

const QDomNode &node = mLayers[i];

QString name = node.namedItem( QStringLiteral( "layername" ) ).toElement().text();

QString type = node.toElement().attribute( QStringLiteral( "type" ) );

QString datasource = node.namedItem( QStringLiteral( "datasource" ) ).toElement().text();

QString provider = node.namedItem( QStringLiteral( "provider" ) ).toElement().text();

QString vectorProvider = type == QLatin1String( "vector" ) ? provider : tr( "none" );

bool providerFileBased = ( QgsProviderRegistry::instance()->providerCapabilities( provider ) & QgsDataProvider::File ) != 0;

QgsDebugMsg( QStringLiteral( "name=%1 type=%2 provider=%3 datasource='%4'" )

.arg( name,

type,

vectorProvider,

datasource ) );

mLayerList->setRowCount( j + 1 );

QTableWidgetItem *item = nullptr;

item = new QTableWidgetItem( name );

item->setData( Qt::UserRole + 0, i );

item->setFlags( item->flags() & ~Qt::ItemIsEditable );

mLayerList->setItem( j, 0, item );

item = new QTableWidgetItem( type );

item->setData( Qt::UserRole + 0, providerFileBased );

item->setFlags( item->flags() & ~Qt::ItemIsEditable );

mLayerList->setItem( j, 1, item );

item = new QTableWidgetItem( vectorProvider );

item->setFlags( item->flags() & ~Qt::ItemIsEditable );

mLayerList->setItem( j, 2, item );

if ( QgsAuthConfigUriEdit::hasConfigId( datasource ) )

{

QToolButton *btn = new QToolButton( this );

btn->setMaximumWidth( 75 );

btn->setMinimumHeight( 24 );

btn->setText( tr( "Edit" ) );

btn->setProperty( "row", j );

connect( btn, &QAbstractButton::clicked, this, &QgsHandleBadLayers::editAuthCfg );

mLayerList->setCellWidget( j, 3, btn );

}

else

{

item = new QTableWidgetItem( QString() );

mLayerList->setItem( j, 3, item );

}

item = new QTableWidgetItem( datasource );

mLayerList->setItem( j, 4, item );

j++;

}

// mLayerList->resizeColumnsToContents();

}

void QgsHandleBadLayers::selectionChanged()

{

mRows.clear();

Q_FOREACH ( QTableWidgetItem *item, mLayerList->selectedItems() )

{

if ( item->column() != 0 )

continue;

bool providerFileBased = mLayerList->item( item->row(), 1 )->data( Qt::UserRole + 0 ).toBool();

if ( !providerFileBased )

continue;

mRows << item->row();

}

mBrowseButton->setEnabled( !mRows.isEmpty() );

}

QString QgsHandleBadLayers::filename( int row )

{

QString type = mLayerList->item( row, 1 )->text();

QString provider = mLayerList->item( row, 2 )->text();

QString datasource = mLayerList->item( row, 4 )->text();

if ( type == QLatin1String( "vector" ) )

{

const QVariantMap parts = QgsProviderRegistry::instance()->decodeUri( provider, datasource );

// if parts is empty then provider doesn't handle this method!

return parts.empty() ? datasource : parts.value( QStringLiteral( "path" ) ).toString();

}

else

{

return datasource;

}

}

void QgsHandleBadLayers::setFilename( int row, const QString &filename )

{

if ( !QFileInfo::exists( filename ) )

return;

QString type = mLayerList->item( row, 1 )->text();

QString provider = mLayerList->item( row, 2 )->text();

QTableWidgetItem *item = mLayerList->item( row, 4 );

QString datasource = item->text();

if ( type == QLatin1String( "vector" ) )

{

if ( provider == QLatin1String( "spatialite" ) )

{

QgsDataSourceUri uri( datasource );

uri.setDatabase( filename );

datasource = uri.uri();

}

else if ( provider == QLatin1String( "ogr" ) )

{

QStringList theURIParts = datasource.split( '|' );

theURIParts[0] = filename;

datasource = theURIParts.join( QStringLiteral( "|" ) );

}

else if ( provider == QLatin1String( "delimitedtext" ) )

{

QUrl uriSource = QUrl::fromEncoded( datasource.toLatin1() );

QUrl uriDest = QUrl::fromLocalFile( filename );

uriDest.setQueryItems( uriSource.queryItems() );

datasource = QString::fromLatin1( uriDest.toEncoded() );

}

}

else

{

datasource = filename;

}

item->setText( datasource );

}

void QgsHandleBadLayers::browseClicked()

{

if ( mRows.size() == 1 )

{

int row = mRows.at( 0 );

QString type = mLayerList->item( row, 1 )->text();

QString memoryQualifier, fileFilter;

if ( type == QLatin1String( "vector" ) )

{

memoryQualifier = QStringLiteral( "lastVectorFileFilter" );

fileFilter = mVectorFileFilter;

}

else

{

memoryQualifier = QStringLiteral( "lastRasterFileFilter" );

fileFilter = mRasterFileFilter;

}

QString fn = filename( row );

if ( fn.isNull() )

return;

QStringList selectedFiles;

QString enc;

QString title = tr( "Select File to Replace '%1'" ).arg( fn );

QgsGuiUtils::openFilesRememberingFilter( memoryQualifier, fileFilter, selectedFiles, enc, title );

if ( selectedFiles.size() != 1 )

{

QMessageBox::information( this, title, tr( "Please select exactly one file." ) );

return;

}

setFilename( row, selectedFiles[0] );

}

else if ( mRows.size() > 1 )

{

QString title = tr( "Select New Directory of Selected Files" );

QgsSettings settings;

QString lastDir = settings.value( QStringLiteral( "UI/missingDirectory" ), QDir::homePath() ).toString();

QString selectedFolder = QFileDialog::getExistingDirectory( this, title, lastDir );

if ( selectedFolder.isEmpty() )

{

return;

}

QDir dir( selectedFolder );

if ( !dir.exists() )

{

return;

}

Q_FOREACH ( int row, mRows )

{

bool providerFileBased = mLayerList->item( row, 1 )->data( Qt::UserRole + 0 ).toBool();

if ( !providerFileBased )

continue;

QString fn = filename( row );

if ( fn.isEmpty() )

continue;

QFileInfo fi( fn );

fi.setFile( dir, fi.fileName() );

if ( !fi.exists() )

continue;

setFilename( row, fi.absoluteFilePath() );

}

}

}

void QgsHandleBadLayers::editAuthCfg()

{

QToolButton *btn = qobject_cast<QToolButton *>( sender() );

int row = -1;

for ( int i = 0; i < mLayerList->rowCount(); i++ )

{

if ( mLayerList->cellWidget( i, 3 ) == btn )

{

row = i;

break;

}

}

if ( row == -1 )

return;

QString provider = mLayerList->item( row, 2 )->text();

if ( provider == QLatin1String( "none" ) )

provider.clear();

QString prevuri = mLayerList->item( row, 4 )->text();

QgsAuthConfigUriEdit *dlg = new QgsAuthConfigUriEdit( this, prevuri, provider );

dlg->setWindowModality( Qt::WindowModal );

dlg->resize( 500, 500 );

if ( dlg->exec() )

{

QString newuri( dlg->dataSourceUri() );

if ( newuri != prevuri )

{

mLayerList->item( row, 4 )->setText( newuri );

}

}

dlg->deleteLater();

}

void QgsHandleBadLayers::apply()

{

QgsProject::instance()->layerTreeRegistryBridge()->setEnabled( true );

buttonBox->button( QDialogButtonBox::Ignore )->setEnabled( false );

for ( int i = 0; i < mLayerList->rowCount(); i++ )

{

int idx = mLayerList->item( i, 0 )->data( Qt::UserRole ).toInt();

QDomNode &node = const_cast<QDomNode &>( mLayers[ idx ] );

QTableWidgetItem *item = mLayerList->item( i, 4 );

QString datasource = item->text();

bool dataSourceChanged { false };

const QString layerId { node.namedItem( QStringLiteral( "id" ) ).toElement().text() };

const QString provider { node.namedItem( QStringLiteral( "provider" ) ).toElement().text() };

const QString name { mLayerList->item( i, 0 )->text() };

// Try first to change the datasource of the existing layers, this will

// maintain the current status (checked/unchecked) and group

if ( QgsProject::instance()->mapLayer( layerId ) )

{

QgsDataProvider::ProviderOptions options;

QgsMapLayer *mapLayer = QgsProject::instance()->mapLayer( layerId );

if ( mapLayer )

{

mapLayer->setDataSource( datasource, name, provider, options );

dataSourceChanged = mapLayer->isValid();

}

}

// If the data source was changed successfully, remove the bad layer from the dialog

// otherwise, try to set the new datasource in the XML node and reload the layer,

// finally marks with red all remaining bad layers.

if ( dataSourceChanged )

{

mLayerList->removeRow( i-- );

}

else

{

node.namedItem( QStringLiteral( "datasource" ) ).toElement().firstChild().toText().setData( datasource );

if ( QgsProject::instance()->readLayer( node ) )

{

mLayerList->removeRow( i-- );

}

else

{

item->setForeground( QBrush( Qt::red ) );

}

}

}

// Final cleanup: remove any bad layer (it should not be any btw)

if ( mLayerList->rowCount() == 0 )

{

QList<QgsMapLayer *> toRemove;

const auto mapLayers = QgsProject::instance()->mapLayers();

for ( const auto &l : mapLayers )

{

if ( ! l->isValid() )

toRemove << l;

}

QgsProject::instance()->removeMapLayers( toRemove );

accept();

}

QgsProject::instance()->layerTreeRegistryBridge()->setEnabled( false );

}

void QgsHandleBadLayers::accept()

{

if ( mLayerList->rowCount() > 0 &&

QMessageBox::warning( this,

tr( "Unhandled layer will be lost." ),

tr( "There are still %n unhandled layer(s). If they are not fixed, they will be disabled/deactivated until the project is opened again.",

"unhandled layers",

mLayerList->rowCount() ),

QMessageBox::Ok | QMessageBox::Cancel,

QMessageBox::Cancel ) == QMessageBox::Cancel )

{

return;

}

QList<QgsMapLayer *> toRemove;

for ( const auto &l : QgsProject::instance()->mapLayers( ) )

{

if ( ! l->isValid() )

toRemove << l;

}

QgsProject::instance()->layerTreeRegistryBridge()->setEnabled( true );

QgsProject::instance()->removeMapLayers( toRemove );

QgsProject::instance()->layerTreeRegistryBridge()->setEnabled( false );

mLayerList->clear();

QDialog::accept();

}

int QgsHandleBadLayers::layerCount()

{

return mLayerList->rowCount();

}