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qgsofflineediting.cpp
1345 lines (1133 loc) · 43.7 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 "qgslayertreegroup.h"
#include "qgslayertreelayer.h"
#include "qgsmaplayer.h"
#include "qgsmaplayerregistry.h"
#include "qgsofflineediting.h"
#include "qgsproject.h"
#include "qgsvectordataprovider.h"
#include "qgsvectorlayereditbuffer.h"
#include "qgsvectorlayerjoinbuffer.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.toUtf8().constData(), &db );
if ( rc != SQLITE_OK )
{
showWarning( tr( "Could not open the spatialite database" ) );
}
else
{
// create logging tables
createLoggingTables( db );
emit progressStarted();
QMap<QString, QgsVectorJoinList > joinInfoBuffer;
QMap<QString, QgsVectorLayer*> layerIdMapping;
for ( int i = 0; i < layerIds.count(); i++ )
{
QgsMapLayer* layer = QgsMapLayerRegistry::instance()->mapLayer( layerIds.at( i ) );
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( layer );
QgsVectorJoinList joins = vl->vectorJoins();
// Layer names will be appended an _offline suffix
// Join fields are prefixed with the layer name and we do not want the
// field name to change so we stabilize the field name by defining a
// custom prefix with the layername without _offline suffix.
QgsVectorJoinList::iterator it = joins.begin();
while ( it != joins.end() )
{
if (( *it ).prefix.isNull() )
{
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( QgsMapLayerRegistry::instance()->mapLayer(( *it ).joinLayerId ) );
if ( vl )
( *it ).prefix = vl->name() + "_";
}
++it;
}
joinInfoBuffer.insert( vl->id(), joins );
}
// 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 ) );
QgsVectorLayer* vl = qobject_cast<QgsVectorLayer*>( layer );
QString origLayerId = vl->id();
QgsVectorLayer* newLayer = copyVectorLayer( vl, db, dbPath );
if ( newLayer )
{
layerIdMapping.insert( origLayerId, newLayer );
}
}
// restore join info on new spatialite layer
QMap<QString, QgsVectorJoinList >::ConstIterator it;
for ( it = joinInfoBuffer.constBegin(); it != joinInfoBuffer.constEnd(); ++it )
{
QgsVectorLayer* newLayer = layerIdMapping.value( it.key() );
if ( newLayer )
{
Q_FOREACH ( QgsVectorJoinInfo join, it.value() )
{
QgsVectorLayer* newJoinedLayer = layerIdMapping.value( join.joinLayerId );
if ( newJoinedLayer )
{
// If the layer has been offline'd, update join information
join.joinLayerId = newJoinedLayer->id();
}
newLayer->addJoin( join );
}
}
}
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 );
// register this layer with the central layers registry
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << remoteLayer, true );
// copy style
copySymbology( offlineLayer, remoteLayer );
// 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
if ( !sqlite_handle )
return;
// checking if this DB is really empty
char **results;
int rows, columns;
int ret = sqlite3_get_table( sqlite_handle, "select count(*) from sqlite_master", &results, &rows, &columns, NULL );
if ( ret != SQLITE_OK )
return;
int count = 0;
if ( rows >= 1 )
{
for ( int i = 1; i <= rows; i++ )
count = atoi( results[( i * columns ) + 0] );
}
sqlite3_free_table( results );
if ( count > 0 )
return;
bool above41 = false;
ret = sqlite3_get_table( sqlite_handle, "select spatialite_version()", &results, &rows, &columns, NULL );
if ( ret == SQLITE_OK && rows == 1 && columns == 1 )
{
QString version = QString::fromUtf8( results[1] );
QStringList parts = version.split( " ", QString::SkipEmptyParts );
if ( parts.size() >= 1 )
{
QStringList verparts = parts[0].split( ".", QString::SkipEmptyParts );
above41 = verparts.size() >= 2 && ( verparts[0].toInt() > 4 || ( verparts[0].toInt() == 4 && verparts[1].toInt() >= 1 ) );
}
}
sqlite3_free_table( results );
// all right, it's empty: proceding to initialize
char *errMsg = 0;
ret = sqlite3_exec( sqlite_handle, above41 ? "SELECT InitSpatialMetadata(1)" : "SELECT InitSpatialMetadata()", 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)
*/
}
QgsVectorLayer* QgsOfflineEditing::copyVectorLayer( QgsVectorLayer* layer, sqlite3* db, const QString& offlineDbPath )
{
if ( layer == 0 )
{
return 0;
}
QString tableName = layer->id();
// 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 || type == QVariant::LongLong )
{
dataType = "INTEGER";
}
else if ( type == QVariant::Double )
{
dataType = "REAL";
}
else if ( type == QVariant::String )
{
dataType = "TEXT";
}
else
{
showWarning( tr( "%1: Unknown data type %2. Not using type affinity for the field." ).arg( fields[idx].name() ).arg( QVariant::typeToName( type ) ) );
}
sql += delim + QString( "'%1' %2" ).arg( fields[idx].name() ).arg( dataType );
delim = ",";
}
sql += ")";
int rc = sqlExec( db, sql );
// add geometry column
if ( layer->hasGeometryType() )
{
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 );
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'%3 sql=" )
.arg( offlineDbPath )
.arg( tableName ).arg( layer->hasGeometryType() ? "(Geometry)" : "" ),
layer->name() + " (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() );
// register this layer with the central layers registry
QgsMapLayerRegistry::instance()->addMapLayers(
QList<QgsMapLayer *>() << newLayer );
// copy style
bool hasLabels = layer->hasLabelsEnabled();
if ( !hasLabels )
{
// NOTE: copy symbology before adding the layer so it is displayed correctly
copySymbology( layer, newLayer );
}
QgsLayerTreeGroup* layerTreeRoot = QgsProject::instance()->layerTreeRoot();
// Find the parent group of the original layer
QgsLayerTreeLayer* layerTreeLayer = layerTreeRoot->findLayer( layer->id() );
if ( layerTreeLayer )
{
QgsLayerTreeGroup* parentTreeGroup = qobject_cast<QgsLayerTreeGroup*>( layerTreeLayer->parent() );
if ( parentTreeGroup )
{
int index = parentTreeGroup->children().indexOf( layerTreeLayer );
// Move the new layer from the root group to the new group
QgsLayerTreeLayer* newLayerTreeLayer = layerTreeRoot->findLayer( newLayer->id() );
if ( newLayerTreeLayer )
{
QgsLayerTreeNode* newLayerTreeLayerClone = newLayerTreeLayer->clone();
QgsLayerTreeGroup* grp = qobject_cast<QgsLayerTreeGroup*>( newLayerTreeLayer->parent() );
parentTreeGroup->insertChildNode( index, newLayerTreeLayerClone );
if ( grp )
grp->removeChildNode( newLayerTreeLayer );
}
}
}
if ( hasLabels )
{
// NOTE: copy symbology of layers with labels enabled after adding to project, as it will crash otherwise (WORKAROUND)
copySymbology( layer, newLayer );
}
// 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( layer->subsetString() );
QgsFeatureIterator fit = layer->dataProvider()->getFeatures();
emit progressModeSet( QgsOfflineEditing::CopyFeatures, layer->dataProvider()->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->dataProvider()->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() );
}
return newLayer;
}
return 0;
}
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 default value for each field
const QgsFields& remoteFlds = remoteLayer->pendingFields();
QVector<QVariant> defaultValues( remoteFlds.count() );
for ( int i = 0; i < remoteFlds.count(); ++i )
{
if ( remoteFlds.fieldOrigin( i ) == QgsFields::OriginProvider )
defaultValues[i] = remoteLayer->dataProvider()->defaultValue( remoteFlds.fieldOriginIndex( i ) );
}
// 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 ];
}
// try to use default value from the provider
// (important especially e.g. for postgis primary key generated from a sequence)
for ( int k = 0; k < newAttrs.count(); ++k )
{
if ( newAttrs[k].isNull() && !defaultValues[k].isNull() )
newAttrs[k] = defaultValues[k];
}
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 );
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( QgsVectorLayer* sourceLayer, QgsVectorLayer* targetLayer )
{
QString error;
QDomDocument doc;
sourceLayer->exportNamedStyle( doc, error );
if ( error.isEmpty() )
{
targetLayer->importNamedStyle( doc, 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 )
{
emit warning( 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.toUtf8().constData(), &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;
}