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qgsofflineediting.cpp
1233 lines (1036 loc) · 39.1 KB
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qgsofflineediting.cpp
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/***************************************************************************
offline_editing.cpp
Offline Editing Plugin
a QGIS plugin
--------------------------------------
Date : 22-Jul-2010
Copyright : (C) 2010 by Sourcepole
Email : info at sourcepole.ch
***************************************************************************
* *
* 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 <qgsapplication.h>
#include <qgsdatasourceuri.h>
#include <qgsgeometry.h>
#include <qgsmaplayer.h>
#include <qgsmaplayerregistry.h>
#include <qgsofflineediting.h>
#include <qgsproject.h>
#include <qgsvectordataprovider.h>
#include <qgsvectorlayereditbuffer.h>
#include <QDir>
#include <QDomDocument>
#include <QDomNode>
#include <QFile>
#include <QMessageBox>
extern "C"
{
#include <sqlite3.h>
#include <spatialite.h>
}
// TODO: DEBUG
#include <QDebug>
// END
#define CUSTOM_PROPERTY_IS_OFFLINE_EDITABLE "isOfflineEditable"
#define CUSTOM_PROPERTY_REMOTE_SOURCE "remoteSource"
#define CUSTOM_PROPERTY_REMOTE_PROVIDER "remoteProvider"
#define PROJECT_ENTRY_SCOPE_OFFLINE "OfflineEditingPlugin"
#define PROJECT_ENTRY_KEY_OFFLINE_DB_PATH "/OfflineDbPath"
QgsOfflineEditing::QgsOfflineEditing()
{
connect( QgsMapLayerRegistry::instance(), SIGNAL( layerWasAdded( QgsMapLayer* ) ), this, SLOT( layerAdded( QgsMapLayer* ) ) );
}
QgsOfflineEditing::~QgsOfflineEditing()
{
}
/**
* convert current project to offline project
* returns offline project file path
*/
bool QgsOfflineEditing::convertToOfflineProject( const QString& offlineDataPath, const QString& offlineDbFile, const QStringList& layerIds )
{
if ( layerIds.isEmpty() )
{
return false;
}
QString dbPath = QDir( offlineDataPath ).absoluteFilePath( offlineDbFile );
if ( createSpatialiteDB( dbPath ) )
{
spatialite_init( 0 );
sqlite3* db;
int rc = sqlite3_open( dbPath.toStdString().c_str(), &db );
if ( rc != SQLITE_OK )
{
showWarning( tr( "Could not open the spatialite database" ) );
}
else
{
// create logging tables
createLoggingTables( db );
emit progressStarted();
// copy selected vector layers to SpatiaLite
for ( int i = 0; i < layerIds.count(); i++ )
{
emit layerProgressUpdated( i + 1, layerIds.count() );
QgsMapLayer* layer = QgsMapLayerRegistry::instance()->mapLayer( layerIds.at( i ) );
copyVectorLayer( qobject_cast<QgsVectorLayer*>( layer ), db, dbPath );
}
emit progressStopped();
sqlite3_close( db );
// save offline project
QString projectTitle = QgsProject::instance()->title();
if ( projectTitle.isEmpty() )
{
projectTitle = QFileInfo( QgsProject::instance()->fileName() ).fileName();
}
projectTitle += " (offline)";
QgsProject::instance()->title( projectTitle );
QgsProject::instance()->writeEntry( PROJECT_ENTRY_SCOPE_OFFLINE, PROJECT_ENTRY_KEY_OFFLINE_DB_PATH, dbPath );
return true;
}
}
return false;
// Workflow:
// copy layers to spatialite
// create spatialite db at offlineDataPath
// create table for each layer
// add new spatialite layer
// copy features
// save as offline project
// mark offline layers
// remove remote layers
// mark as offline project
}
bool QgsOfflineEditing::isOfflineProject()
{
return !QgsProject::instance()->readEntry( PROJECT_ENTRY_SCOPE_OFFLINE, PROJECT_ENTRY_KEY_OFFLINE_DB_PATH ).isEmpty();
}
void QgsOfflineEditing::synchronize()
{
// open logging db
sqlite3* db = openLoggingDb();
if ( db == NULL )
{
return;
}
emit progressStarted();
// restore and sync remote layers
QList<QgsMapLayer*> offlineLayers;
QMap<QString, QgsMapLayer*> mapLayers = QgsMapLayerRegistry::instance()->mapLayers();
for ( QMap<QString, QgsMapLayer*>::iterator layer_it = mapLayers.begin() ; layer_it != mapLayers.end(); ++layer_it )
{
QgsMapLayer* layer = layer_it.value();
if ( layer->customProperty( CUSTOM_PROPERTY_IS_OFFLINE_EDITABLE, false ).toBool() )
{
offlineLayers << layer;
}
}
for ( int l = 0; l < offlineLayers.count(); l++ )
{
QgsMapLayer* layer = offlineLayers[l];
emit layerProgressUpdated( l + 1, offlineLayers.count() );
QString remoteSource = layer->customProperty( CUSTOM_PROPERTY_REMOTE_SOURCE, "" ).toString();
QString remoteProvider = layer->customProperty( CUSTOM_PROPERTY_REMOTE_PROVIDER, "" ).toString();
QString remoteName = layer->name();
remoteName.remove( QRegExp( " \\(offline\\)$" ) );
QgsVectorLayer* remoteLayer = new QgsVectorLayer( remoteSource, remoteName, remoteProvider );
if ( remoteLayer->isValid() )
{
// TODO: only add remote layer if there are log entries?
QgsVectorLayer* offlineLayer = qobject_cast<QgsVectorLayer*>( layer );
// copy style
copySymbology( offlineLayer, remoteLayer );
// register this layer with the central layers registry
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << remoteLayer, true );
// apply layer edit log
QString qgisLayerId = layer->id();
QString sql = QString( "SELECT \"id\" FROM 'log_layer_ids' WHERE \"qgis_id\" = '%1'" ).arg( qgisLayerId );
int layerId = sqlQueryInt( db, sql, -1 );
if ( layerId != -1 )
{
remoteLayer->startEditing();
// TODO: only get commitNos of this layer?
int commitNo = getCommitNo( db );
for ( int i = 0; i < commitNo; i++ )
{
// apply commits chronologically
applyAttributesAdded( remoteLayer, db, layerId, i );
applyAttributeValueChanges( offlineLayer, remoteLayer, db, layerId, i );
applyGeometryChanges( remoteLayer, db, layerId, i );
}
applyFeaturesAdded( offlineLayer, remoteLayer, db, layerId );
applyFeaturesRemoved( remoteLayer, db, layerId );
if ( remoteLayer->commitChanges() )
{
// update fid lookup
updateFidLookup( remoteLayer, db, layerId );
// clear edit log for this layer
sql = QString( "DELETE FROM 'log_added_attrs' WHERE \"layer_id\" = %1" ).arg( layerId );
sqlExec( db, sql );
sql = QString( "DELETE FROM 'log_added_features' WHERE \"layer_id\" = %1" ).arg( layerId );
sqlExec( db, sql );
sql = QString( "DELETE FROM 'log_removed_features' WHERE \"layer_id\" = %1" ).arg( layerId );
sqlExec( db, sql );
sql = QString( "DELETE FROM 'log_feature_updates' WHERE \"layer_id\" = %1" ).arg( layerId );
sqlExec( db, sql );
sql = QString( "DELETE FROM 'log_geometry_updates' WHERE \"layer_id\" = %1" ).arg( layerId );
sqlExec( db, sql );
// reset commitNo
QString sql = QString( "UPDATE 'log_indices' SET 'last_index' = 0 WHERE \"name\" = 'commit_no'" );
sqlExec( db, sql );
}
else
{
showWarning( remoteLayer->commitErrors().join( "\n" ) );
}
}
// remove offline layer
QgsMapLayerRegistry::instance()->removeMapLayers(
( QStringList() << qgisLayerId ) );
// disable offline project
QString projectTitle = QgsProject::instance()->title();
projectTitle.remove( QRegExp( " \\(offline\\)$" ) );
QgsProject::instance()->title( projectTitle );
QgsProject::instance()->removeEntry( PROJECT_ENTRY_SCOPE_OFFLINE, PROJECT_ENTRY_KEY_OFFLINE_DB_PATH );
remoteLayer->reload(); //update with other changes
}
}
emit progressStopped();
sqlite3_close( db );
}
void QgsOfflineEditing::initializeSpatialMetadata( sqlite3 *sqlite_handle )
{
// attempting to perform self-initialization for a newly created DB
int ret;
char sql[1024];
char *errMsg = NULL;
int count = 0;
int i;
char **results;
int rows;
int columns;
if ( sqlite_handle == NULL )
return;
// checking if this DB is really empty
strcpy( sql, "SELECT Count(*) from sqlite_master" );
ret = sqlite3_get_table( sqlite_handle, sql, &results, &rows, &columns, NULL );
if ( ret != SQLITE_OK )
return;
if ( rows < 1 )
;
else
{
for ( i = 1; i <= rows; i++ )
count = atoi( results[( i * columns ) + 0] );
}
sqlite3_free_table( results );
if ( count > 0 )
return;
// all right, it's empty: proceding to initialize
strcpy( sql, "SELECT InitSpatialMetadata()" );
ret = sqlite3_exec( sqlite_handle, sql, NULL, NULL, &errMsg );
if ( ret != SQLITE_OK )
{
QString errCause = tr( "Unable to initialize SpatialMetadata:\n" );
errCause += QString::fromUtf8( errMsg );
showWarning( errCause );
sqlite3_free( errMsg );
return;
}
spatial_ref_sys_init( sqlite_handle, 0 );
}
bool QgsOfflineEditing::createSpatialiteDB( const QString& offlineDbPath )
{
int ret;
sqlite3 *sqlite_handle;
char *errMsg = NULL;
QFile newDb( offlineDbPath );
if ( newDb.exists() )
{
QFile::remove( offlineDbPath );
}
// see also QgsNewSpatialiteLayerDialog::createDb()
QFileInfo fullPath = QFileInfo( offlineDbPath );
QDir path = fullPath.dir();
// Must be sure there is destination directory ~/.qgis
QDir().mkpath( path.absolutePath( ) );
// creating/opening the new database
QString dbPath = newDb.fileName();
spatialite_init( 0 );
ret = sqlite3_open_v2( dbPath.toUtf8().constData(), &sqlite_handle, SQLITE_OPEN_READWRITE | SQLITE_OPEN_CREATE, NULL );
if ( ret )
{
// an error occurred
QString errCause = tr( "Could not create a new database\n" );
errCause += QString::fromUtf8( sqlite3_errmsg( sqlite_handle ) );
sqlite3_close( sqlite_handle );
showWarning( errCause );
return false;
}
// activating Foreign Key constraints
ret = sqlite3_exec( sqlite_handle, "PRAGMA foreign_keys = 1", NULL, 0, &errMsg );
if ( ret != SQLITE_OK )
{
showWarning( tr( "Unable to activate FOREIGN_KEY constraints" ) );
sqlite3_free( errMsg );
sqlite3_close( sqlite_handle );
return false;
}
initializeSpatialMetadata( sqlite_handle );
// all done: closing the DB connection
sqlite3_close( sqlite_handle );
return true;
}
void QgsOfflineEditing::createLoggingTables( sqlite3* db )
{
// indices
QString sql = "CREATE TABLE 'log_indices' ('name' TEXT, 'last_index' INTEGER)";
sqlExec( db, sql );
sql = "INSERT INTO 'log_indices' VALUES ('commit_no', 0)";
sqlExec( db, sql );
sql = "INSERT INTO 'log_indices' VALUES ('layer_id', 0)";
sqlExec( db, sql );
// layername <-> layer id
sql = "CREATE TABLE 'log_layer_ids' ('id' INTEGER, 'qgis_id' TEXT)";
sqlExec( db, sql );
// offline fid <-> remote fid
sql = "CREATE TABLE 'log_fids' ('layer_id' INTEGER, 'offline_fid' INTEGER, 'remote_fid' INTEGER)";
sqlExec( db, sql );
// added attributes
sql = "CREATE TABLE 'log_added_attrs' ('layer_id' INTEGER, 'commit_no' INTEGER, ";
sql += "'name' TEXT, 'type' INTEGER, 'length' INTEGER, 'precision' INTEGER, 'comment' TEXT)";
sqlExec( db, sql );
// added features
sql = "CREATE TABLE 'log_added_features' ('layer_id' INTEGER, 'fid' INTEGER)";
sqlExec( db, sql );
// removed features
sql = "CREATE TABLE 'log_removed_features' ('layer_id' INTEGER, 'fid' INTEGER)";
sqlExec( db, sql );
// feature updates
sql = "CREATE TABLE 'log_feature_updates' ('layer_id' INTEGER, 'commit_no' INTEGER, 'fid' INTEGER, 'attr' INTEGER, 'value' TEXT)";
sqlExec( db, sql );
// geometry updates
sql = "CREATE TABLE 'log_geometry_updates' ('layer_id' INTEGER, 'commit_no' INTEGER, 'fid' INTEGER, 'geom_wkt' TEXT)";
sqlExec( db, sql );
/* TODO: other logging tables
- attr delete (not supported by SpatiaLite provider)
*/
}
void QgsOfflineEditing::copyVectorLayer( QgsVectorLayer* layer, sqlite3* db, const QString& offlineDbPath )
{
if ( layer == NULL )
{
return;
}
QString tableName = layer->name();
// create table
QString sql = QString( "CREATE TABLE '%1' (" ).arg( tableName );
QString delim = "";
const QgsFields& fields = layer->dataProvider()->fields();
for ( int idx = 0; idx < fields.count(); ++idx )
{
QString dataType = "";
QVariant::Type type = fields[idx].type();
if ( type == QVariant::Int )
{
dataType = "INTEGER";
}
else if ( type == QVariant::Double )
{
dataType = "REAL";
}
else if ( type == QVariant::String )
{
dataType = "TEXT";
}
else
{
showWarning( tr( "Unknown data type %1" ).arg( type ) );
}
sql += delim + QString( "'%1' %2" ).arg( fields[idx].name() ).arg( dataType );
delim = ",";
}
sql += ")";
// add geometry column
QString geomType = "";
switch ( layer->wkbType() )
{
case QGis::WKBPoint:
geomType = "POINT";
break;
case QGis::WKBMultiPoint:
geomType = "MULTIPOINT";
break;
case QGis::WKBLineString:
geomType = "LINESTRING";
break;
case QGis::WKBMultiLineString:
geomType = "MULTILINESTRING";
break;
case QGis::WKBPolygon:
geomType = "POLYGON";
break;
case QGis::WKBMultiPolygon:
geomType = "MULTIPOLYGON";
break;
default:
showWarning( tr( "QGIS wkbType %1 not supported" ).arg( layer->wkbType() ) );
break;
};
QString sqlAddGeom = QString( "SELECT AddGeometryColumn('%1', 'Geometry', %2, '%3', 2)" )
.arg( tableName )
.arg( layer->crs().authid().startsWith( "EPSG:", Qt::CaseInsensitive ) ? layer->crs().authid().mid( 5 ).toLong() : 0 )
.arg( geomType );
// create spatial index
QString sqlCreateIndex = QString( "SELECT CreateSpatialIndex('%1', 'Geometry')" ).arg( tableName );
int rc = sqlExec( db, sql );
if ( rc == SQLITE_OK )
{
rc = sqlExec( db, sqlAddGeom );
if ( rc == SQLITE_OK )
{
rc = sqlExec( db, sqlCreateIndex );
}
}
if ( rc == SQLITE_OK )
{
// add new layer
QgsVectorLayer* newLayer = new QgsVectorLayer( QString( "dbname='%1' table='%2'(Geometry) sql=" )
.arg( offlineDbPath ).arg( tableName ), tableName + " (offline)", "spatialite" );
if ( newLayer->isValid() )
{
// mark as offline layer
newLayer->setCustomProperty( CUSTOM_PROPERTY_IS_OFFLINE_EDITABLE, true );
// store original layer source
newLayer->setCustomProperty( CUSTOM_PROPERTY_REMOTE_SOURCE, layer->source() );
newLayer->setCustomProperty( CUSTOM_PROPERTY_REMOTE_PROVIDER, layer->providerType() );
// copy style
bool hasLabels = layer->hasLabelsEnabled();
if ( !hasLabels )
{
// NOTE: copy symbology before adding the layer so it is displayed correctly
copySymbology( layer, newLayer );
}
// register this layer with the central layers registry
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << newLayer );
if ( hasLabels )
{
// NOTE: copy symbology of layers with labels enabled after adding to project, as it will crash otherwise (WORKAROUND)
copySymbology( layer, newLayer );
}
// TODO: layer order
// copy features
newLayer->startEditing();
QgsFeature f;
// NOTE: force feature recount for PostGIS layer, else only visible features are counted, before iterating over all features (WORKAROUND)
layer->setSubsetString( "" );
QgsFeatureIterator fit = layer->getFeatures();
emit progressModeSet( QgsOfflineEditing::CopyFeatures, layer->featureCount() );
int featureCount = 1;
QList<QgsFeatureId> remoteFeatureIds;
while ( fit.nextFeature( f ) )
{
remoteFeatureIds << f.id();
// NOTE: Spatialite provider ignores position of geometry column
// fill gap in QgsAttributeMap if geometry column is not last (WORKAROUND)
int column = 0;
QgsAttributes attrs = f.attributes();
QgsAttributes newAttrs(attrs.count());
for ( int it = 0; it < attrs.count(); ++it )
{
newAttrs[column++] = attrs[it];
}
f.setAttributes( newAttrs );
newLayer->addFeature( f, false );
emit progressUpdated( featureCount++ );
}
if ( newLayer->commitChanges() )
{
emit progressModeSet( QgsOfflineEditing::ProcessFeatures, layer->featureCount() );
featureCount = 1;
// update feature id lookup
int layerId = getOrCreateLayerId( db, newLayer->id() );
QList<QgsFeatureId> offlineFeatureIds;
QgsFeatureIterator fit = newLayer->getFeatures( QgsFeatureRequest().setFlags( QgsFeatureRequest::NoGeometry ).setSubsetOfAttributes( QgsAttributeList() ) );
while ( fit.nextFeature( f ) )
{
offlineFeatureIds << f.id();
}
// NOTE: insert fids in this loop, as the db is locked during newLayer->nextFeature()
sqlExec( db, "BEGIN" );
int remoteCount = remoteFeatureIds.size();
for ( int i = 0; i < remoteCount; i++ )
{
addFidLookup( db, layerId, offlineFeatureIds.at( i ), remoteFeatureIds.at( remoteCount - (i+1) ) );
emit progressUpdated( featureCount++ );
}
sqlExec( db, "COMMIT" );
}
else
{
showWarning( newLayer->commitErrors().join( "\n" ) );
}
// remove remote layer
QgsMapLayerRegistry::instance()->removeMapLayers(
QStringList() << layer->id() );
}
}
}
void QgsOfflineEditing::applyAttributesAdded( QgsVectorLayer* remoteLayer, sqlite3* db, int layerId, int commitNo )
{
QString sql = QString( "SELECT \"name\", \"type\", \"length\", \"precision\", \"comment\" FROM 'log_added_attrs' WHERE \"layer_id\" = %1 AND \"commit_no\" = %2" ).arg( layerId ).arg( commitNo );
QList<QgsField> fields = sqlQueryAttributesAdded( db, sql );
const QgsVectorDataProvider* provider = remoteLayer->dataProvider();
QList<QgsVectorDataProvider::NativeType> nativeTypes = provider->nativeTypes();
// NOTE: uses last matching QVariant::Type of nativeTypes
QMap < QVariant::Type, QString /*typeName*/ > typeNameLookup;
for ( int i = 0; i < nativeTypes.size(); i++ )
{
QgsVectorDataProvider::NativeType nativeType = nativeTypes.at( i );
typeNameLookup[ nativeType.mType ] = nativeType.mTypeName;
}
emit progressModeSet( QgsOfflineEditing::AddFields, fields.size() );
for ( int i = 0; i < fields.size(); i++ )
{
// lookup typename from layer provider
QgsField field = fields[i];
if ( typeNameLookup.contains( field.type() ) )
{
QString typeName = typeNameLookup[ field.type()];
field.setTypeName( typeName );
remoteLayer->addAttribute( field );
}
else
{
showWarning( QString( "Could not add attribute '%1' of type %2" ).arg( field.name() ).arg( field.type() ) );
}
emit progressUpdated( i + 1 );
}
}
void QgsOfflineEditing::applyFeaturesAdded( QgsVectorLayer* offlineLayer, QgsVectorLayer* remoteLayer, sqlite3* db, int layerId )
{
QString sql = QString( "SELECT \"fid\" FROM 'log_added_features' WHERE \"layer_id\" = %1" ).arg( layerId );
QList<int> newFeatureIds = sqlQueryInts( db, sql );
// get new features from offline layer
QgsFeatureList features;
for ( int i = 0; i < newFeatureIds.size(); i++ )
{
QgsFeature feature;
if ( offlineLayer->getFeatures( QgsFeatureRequest().setFilterFid( newFeatureIds.at( i ) ) ).nextFeature( feature ) )
{
features << feature;
}
}
// copy features to remote layer
emit progressModeSet( QgsOfflineEditing::AddFeatures, features.size() );
int i = 1;
int newAttrsCount = remoteLayer->pendingFields().count();
for ( QgsFeatureList::iterator it = features.begin(); it != features.end(); ++it )
{
QgsFeature f = *it;
// NOTE: Spatialite provider ignores position of geometry column
// restore gap in QgsAttributeMap if geometry column is not last (WORKAROUND)
QMap<int, int> attrLookup = attributeLookup( offlineLayer, remoteLayer );
QgsAttributes newAttrs( newAttrsCount );
QgsAttributes attrs = f.attributes();
for ( int it = 0; it < attrs.count(); ++it )
{
newAttrs[ attrLookup[ it ] ] = attrs[ it ];
}
f.setAttributes( newAttrs );
remoteLayer->addFeature( f, false );
emit progressUpdated( i++ );
}
}
void QgsOfflineEditing::applyFeaturesRemoved( QgsVectorLayer* remoteLayer, sqlite3* db, int layerId )
{
QString sql = QString( "SELECT \"fid\" FROM 'log_removed_features' WHERE \"layer_id\" = %1" ).arg( layerId );
QgsFeatureIds values = sqlQueryFeaturesRemoved( db, sql );
emit progressModeSet( QgsOfflineEditing::RemoveFeatures, values.size() );
int i = 1;
for ( QgsFeatureIds::const_iterator it = values.begin(); it != values.end(); ++it )
{
QgsFeatureId fid = remoteFid( db, layerId, *it );
remoteLayer->deleteFeature( fid );
emit progressUpdated( i++ );
}
}
void QgsOfflineEditing::applyAttributeValueChanges( QgsVectorLayer* offlineLayer, QgsVectorLayer* remoteLayer, sqlite3* db, int layerId, int commitNo )
{
QString sql = QString( "SELECT \"fid\", \"attr\", \"value\" FROM 'log_feature_updates' WHERE \"layer_id\" = %1 AND \"commit_no\" = %2 " ).arg( layerId ).arg( commitNo );
AttributeValueChanges values = sqlQueryAttributeValueChanges( db, sql );
emit progressModeSet( QgsOfflineEditing::UpdateFeatures, values.size() );
QMap<int, int> attrLookup = attributeLookup( offlineLayer, remoteLayer );
for ( int i = 0; i < values.size(); i++ )
{
QgsFeatureId fid = remoteFid( db, layerId, values.at( i ).fid );
remoteLayer->changeAttributeValue( fid, attrLookup[ values.at( i ).attr ], values.at( i ).value, false );
emit progressUpdated( i + 1 );
}
}
void QgsOfflineEditing::applyGeometryChanges( QgsVectorLayer* remoteLayer, sqlite3* db, int layerId, int commitNo )
{
QString sql = QString( "SELECT \"fid\", \"geom_wkt\" FROM 'log_geometry_updates' WHERE \"layer_id\" = %1 AND \"commit_no\" = %2" ).arg( layerId ).arg( commitNo );
GeometryChanges values = sqlQueryGeometryChanges( db, sql );
emit progressModeSet( QgsOfflineEditing::UpdateGeometries, values.size() );
for ( int i = 0; i < values.size(); i++ )
{
QgsFeatureId fid = remoteFid( db, layerId, values.at( i ).fid );
remoteLayer->changeGeometry( fid, QgsGeometry::fromWkt( values.at( i ).geom_wkt ) );
emit progressUpdated( i + 1 );
}
}
void QgsOfflineEditing::updateFidLookup( QgsVectorLayer* remoteLayer, sqlite3* db, int layerId )
{
// update fid lookup for added features
// get remote added fids
// NOTE: use QMap for sorted fids
QMap < QgsFeatureId, bool /*dummy*/ > newRemoteFids;
QgsFeature f;
QgsFeatureIterator fit = remoteLayer->getFeatures( QgsFeatureRequest().setFlags( QgsFeatureRequest::NoGeometry ).setSubsetOfAttributes( QgsAttributeList() ) );
emit progressModeSet( QgsOfflineEditing::ProcessFeatures, remoteLayer->featureCount() );
int i = 1;
while ( fit.nextFeature( f ) )
{
if ( offlineFid( db, layerId, f.id() ) == -1 )
{
newRemoteFids[ f.id()] = true;
}
emit progressUpdated( i++ );
}
// get local added fids
// NOTE: fids are sorted
QString sql = QString( "SELECT \"fid\" FROM 'log_added_features' WHERE \"layer_id\" = %1" ).arg( layerId );
QList<int> newOfflineFids = sqlQueryInts( db, sql );
if ( newRemoteFids.size() != newOfflineFids.size() )
{
//showWarning( QString( "Different number of new features on offline layer (%1) and remote layer (%2)" ).arg(newOfflineFids.size()).arg(newRemoteFids.size()) );
}
else
{
// add new fid lookups
i = 0;
sqlExec( db, "BEGIN" );
for ( QMap<QgsFeatureId, bool>::const_iterator it = newRemoteFids.begin(); it != newRemoteFids.end(); ++it )
{
addFidLookup( db, layerId, newOfflineFids.at( i++ ), it.key() );
}
sqlExec( db, "COMMIT" );
}
}
void QgsOfflineEditing::copySymbology( const QgsVectorLayer* sourceLayer, QgsVectorLayer* targetLayer )
{
QString error;
QDomDocument doc;
QDomElement node = doc.createElement( "symbology" );
doc.appendChild( node );
sourceLayer->writeSymbology( node, doc, error );
if ( error.isEmpty() )
{
targetLayer->readSymbology( node, error );
}
if ( !error.isEmpty() )
{
showWarning( error );
}
}
// NOTE: use this to map column indices in case the remote geometry column is not last
QMap<int, int> QgsOfflineEditing::attributeLookup( QgsVectorLayer* offlineLayer, QgsVectorLayer* remoteLayer )
{
const QgsAttributeList& offlineAttrs = offlineLayer->pendingAllAttributesList();
const QgsAttributeList& remoteAttrs = remoteLayer->pendingAllAttributesList();
QMap < int /*offline attr*/, int /*remote attr*/ > attrLookup;
// NOTE: use size of remoteAttrs, as offlineAttrs can have new attributes not yet synced
for ( int i = 0; i < remoteAttrs.size(); i++ )
{
attrLookup.insert( offlineAttrs.at( i ), remoteAttrs.at( i ) );
}
return attrLookup;
}
void QgsOfflineEditing::showWarning( const QString& message )
{
QMessageBox::warning( NULL, tr( "Offline Editing Plugin" ), message );
}
sqlite3* QgsOfflineEditing::openLoggingDb()
{
sqlite3* db = NULL;
QString dbPath = QgsProject::instance()->readEntry( PROJECT_ENTRY_SCOPE_OFFLINE, PROJECT_ENTRY_KEY_OFFLINE_DB_PATH );
if ( !dbPath.isEmpty() )
{
int rc = sqlite3_open( dbPath.toStdString().c_str(), &db );
if ( rc != SQLITE_OK )
{
showWarning( tr( "Could not open the spatialite logging database" ) );
sqlite3_close( db );
db = NULL;
}
}
return db;
}
int QgsOfflineEditing::getOrCreateLayerId( sqlite3* db, const QString& qgisLayerId )
{
QString sql = QString( "SELECT \"id\" FROM 'log_layer_ids' WHERE \"qgis_id\" = '%1'" ).arg( qgisLayerId );
int layerId = sqlQueryInt( db, sql, -1 );
if ( layerId == -1 )
{
// next layer id
sql = "SELECT \"last_index\" FROM 'log_indices' WHERE \"name\" = 'layer_id'";
int newLayerId = sqlQueryInt( db, sql, -1 );
// insert layer
sql = QString( "INSERT INTO 'log_layer_ids' VALUES (%1, '%2')" ).arg( newLayerId ).arg( qgisLayerId );
sqlExec( db, sql );
// increase layer_id
// TODO: use trigger for auto increment?
sql = QString( "UPDATE 'log_indices' SET 'last_index' = %1 WHERE \"name\" = 'layer_id'" ).arg( newLayerId + 1 );
sqlExec( db, sql );
layerId = newLayerId;
}
return layerId;
}
int QgsOfflineEditing::getCommitNo( sqlite3* db )
{
QString sql = "SELECT \"last_index\" FROM 'log_indices' WHERE \"name\" = 'commit_no'";
return sqlQueryInt( db, sql, -1 );
}
void QgsOfflineEditing::increaseCommitNo( sqlite3* db )
{
QString sql = QString( "UPDATE 'log_indices' SET 'last_index' = %1 WHERE \"name\" = 'commit_no'" ).arg( getCommitNo( db ) + 1 );
sqlExec( db, sql );
}
void QgsOfflineEditing::addFidLookup( sqlite3* db, int layerId, QgsFeatureId offlineFid, QgsFeatureId remoteFid )
{
QString sql = QString( "INSERT INTO 'log_fids' VALUES ( %1, %2, %3 )" ).arg( layerId ).arg( offlineFid ).arg( remoteFid );
sqlExec( db, sql );
}
QgsFeatureId QgsOfflineEditing::remoteFid( sqlite3* db, int layerId, QgsFeatureId offlineFid )
{
QString sql = QString( "SELECT \"remote_fid\" FROM 'log_fids' WHERE \"layer_id\" = %1 AND \"offline_fid\" = %2" ).arg( layerId ).arg( offlineFid );
return sqlQueryInt( db, sql, -1 );
}
QgsFeatureId QgsOfflineEditing::offlineFid( sqlite3* db, int layerId, QgsFeatureId remoteFid )
{
QString sql = QString( "SELECT \"offline_fid\" FROM 'log_fids' WHERE \"layer_id\" = %1 AND \"remote_fid\" = %2" ).arg( layerId ).arg( remoteFid );
return sqlQueryInt( db, sql, -1 );
}
bool QgsOfflineEditing::isAddedFeature( sqlite3* db, int layerId, QgsFeatureId fid )
{
QString sql = QString( "SELECT COUNT(\"fid\") FROM 'log_added_features' WHERE \"layer_id\" = %1 AND \"fid\" = %2" ).arg( layerId ).arg( fid );
return ( sqlQueryInt( db, sql, 0 ) > 0 );
}
int QgsOfflineEditing::sqlExec( sqlite3* db, const QString& sql )
{
char * errmsg;
int rc = sqlite3_exec( db, sql.toUtf8(), NULL, NULL, &errmsg );
if ( rc != SQLITE_OK )
{
showWarning( errmsg );
}
return rc;
}
int QgsOfflineEditing::sqlQueryInt( sqlite3* db, const QString& sql, int defaultValue )
{
sqlite3_stmt* stmt = NULL;
if ( sqlite3_prepare_v2( db, sql.toUtf8().constData(), -1, &stmt, NULL ) != SQLITE_OK )
{
showWarning( sqlite3_errmsg( db ) );
return defaultValue;
}
int value = defaultValue;
int ret = sqlite3_step( stmt );
if ( ret == SQLITE_ROW )
{
value = sqlite3_column_int( stmt, 0 );
}
sqlite3_finalize( stmt );
return value;
}
QList<int> QgsOfflineEditing::sqlQueryInts( sqlite3* db, const QString& sql )
{
QList<int> values;
sqlite3_stmt* stmt = NULL;
if ( sqlite3_prepare_v2( db, sql.toUtf8().constData(), -1, &stmt, NULL ) != SQLITE_OK )
{
showWarning( sqlite3_errmsg( db ) );
return values;
}
int ret = sqlite3_step( stmt );
while ( ret == SQLITE_ROW )
{
values << sqlite3_column_int( stmt, 0 );
ret = sqlite3_step( stmt );
}
sqlite3_finalize( stmt );
return values;
}
QList<QgsField> QgsOfflineEditing::sqlQueryAttributesAdded( sqlite3* db, const QString& sql )
{
QList<QgsField> values;
sqlite3_stmt* stmt = NULL;
if ( sqlite3_prepare_v2( db, sql.toUtf8().constData(), -1, &stmt, NULL ) != SQLITE_OK )
{
showWarning( sqlite3_errmsg( db ) );
return values;
}
int ret = sqlite3_step( stmt );
while ( ret == SQLITE_ROW )
{
QgsField field( QString(( const char* )sqlite3_column_text( stmt, 0 ) ),
( QVariant::Type )sqlite3_column_int( stmt, 1 ),
"", // typeName
sqlite3_column_int( stmt, 2 ),
sqlite3_column_int( stmt, 3 ),
QString(( const char* )sqlite3_column_text( stmt, 4 ) ) );
values << field;
ret = sqlite3_step( stmt );
}
sqlite3_finalize( stmt );
return values;
}
QgsFeatureIds QgsOfflineEditing::sqlQueryFeaturesRemoved( sqlite3* db, const QString& sql )
{
QgsFeatureIds values;
sqlite3_stmt* stmt = NULL;
if ( sqlite3_prepare_v2( db, sql.toUtf8().constData(), -1, &stmt, NULL ) != SQLITE_OK )
{
showWarning( sqlite3_errmsg( db ) );
return values;
}
int ret = sqlite3_step( stmt );
while ( ret == SQLITE_ROW )
{
values << sqlite3_column_int( stmt, 0 );
ret = sqlite3_step( stmt );
}
sqlite3_finalize( stmt );
return values;
}
QgsOfflineEditing::AttributeValueChanges QgsOfflineEditing::sqlQueryAttributeValueChanges( sqlite3* db, const QString& sql )
{
AttributeValueChanges values;
sqlite3_stmt* stmt = NULL;
if ( sqlite3_prepare_v2( db, sql.toUtf8().constData(), -1, &stmt, NULL ) != SQLITE_OK )
{
showWarning( sqlite3_errmsg( db ) );
return values;
}
int ret = sqlite3_step( stmt );
while ( ret == SQLITE_ROW )
{
AttributeValueChange change;
change.fid = sqlite3_column_int( stmt, 0 );
change.attr = sqlite3_column_int( stmt, 1 );
change.value = QString(( const char* )sqlite3_column_text( stmt, 2 ) );
values << change;
ret = sqlite3_step( stmt );
}
sqlite3_finalize( stmt );
return values;
}