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#include "importworker.h"
#include "schemaresolver.h"
#include "services/notifymanager.h"
#include "db/db.h"
#include "plugins/importplugin.h"
#include "common/utils.h"
ImportWorker::ImportWorker(ImportPlugin* plugin, ImportManager::StandardImportConfig* config, Db* db, const QString& table, QObject *parent) :
QObject(parent), plugin(plugin), config(config), db(db), table(table)
{
}
void ImportWorker::run()
{
if (!plugin->beforeImport(*config))
{
emit finished(false, 0);
return;
}
readPluginColumns();
if (columnsFromPlugin.size() == 0)
{
error(tr("No columns provided by the import plugin."));
return;
}
shouldSkipTransaction = config->skipTransaction || db->isTransactionActive();
if (!shouldSkipTransaction && !db->begin(config->noDbLock))
{
error(tr("Could not start transaction in order to import a data: %1").arg(db->getErrorText()));
return;
}
if (!prepareTable())
{
if (!shouldSkipTransaction)
db->rollback(config->noDbLock);
return;
}
int rowCount = 0;
if (!importData(rowCount))
{
if (!shouldSkipTransaction)
db->rollback(config->noDbLock);
return;
}
if (!shouldSkipTransaction && !db->commit(config->noDbLock))
{
error(tr("Could not commit transaction for imported data: %1").arg(db->getErrorText()));
if (!shouldSkipTransaction)
db->rollback(config->noDbLock);
return;
}
if (tableCreated)
emit createdTable(db, table);
plugin->afterImport();
emit finished(true, rowCount);
}
void ImportWorker::interrupt()
{
QMutexLocker locker(&interruptMutex);
interrupted = true;
}
void ImportWorker::readPluginColumns()
{
QList<ImportPlugin::ColumnDefinition> pluginColumnDefinitions = plugin->getColumns();
for (const ImportPlugin::ColumnDefinition& colDef : pluginColumnDefinitions)
{
columnsFromPlugin << colDef.first;
columnTypesFromPlugin << colDef.second;
}
}
void ImportWorker::error(const QString& err)
{
notifyError(err);
plugin->afterImport();
emit finished(false, 0);
}
bool ImportWorker::prepareTable()
{
QStringList finalColumns;
SchemaResolver resolver(db);
tableColumns = resolver.getTableColumns(table);
if (tableColumns.size() > 0)
{
if (tableColumns.size() < columnsFromPlugin.size())
{
notifyWarn(tr("Table '%1' has less columns than there are columns in the data to be imported. Excessive data columns will be ignored.").arg(table));
finalColumns = tableColumns;
}
else if (tableColumns.size() > columnsFromPlugin.size())
{
notifyInfo(tr("Table '%1' has more columns than there are columns in the data to be imported. Some columns in the table will be left empty.").arg(table));
finalColumns = tableColumns.mid(0, columnsFromPlugin.size());
}
else
{
finalColumns = tableColumns;
}
}
else
{
QStringList colDefs;
for (int i = 0; i < columnsFromPlugin.size(); i++)
colDefs << (wrapObjIfNeeded(columnsFromPlugin[i]) + " " + columnTypesFromPlugin[i]).trimmed();
static const QString ddl = QStringLiteral("CREATE TABLE %1 (%2)");
Db::Flags flags = config->noDbLock ? Db::Flag::NO_LOCK : Db::Flag::NONE;
SqlQueryPtr result = db->exec(ddl.arg(wrapObjIfNeeded(table), colDefs.join(", ")), flags);
if (result->isError())
{
error(tr("Could not create table to import to: %1").arg(result->getErrorText()));
return false;
}
finalColumns = columnsFromPlugin;
tableCreated = true;
}
if (isInterrupted())
{
error(tr("Error while importing data: %1").arg(tr("Interrupted.", "import process status update")));
return false;
}
targetColumns = wrapObjNamesIfNeeded(finalColumns);
return true;
}
bool ImportWorker::importData(int& rowCount)
{
static const QString insertTemplate = QStringLiteral("INSERT INTO %1 (%2) VALUES (%3)");
int colCount = targetColumns.size();
QStringList valList;
for (int i = 0; i < colCount; i++)
valList << "?";
QString theInsert = insertTemplate.arg(wrapObjIfNeeded(table),
targetColumns.join(", "),
valList.join(", "));
SqlQueryPtr query = db->prepare(theInsert);
query->setFlags(Db::Flag::SKIP_DROP_DETECTION|Db::Flag::SKIP_PARAM_COUNTING|Db::Flag::NO_LOCK);
rowCount = 0;
QList<QVariant> row;
while ((row = plugin->next()).size() > 0)
{
// Fill up missing values in the line
for (int i = row.size(); i < colCount; i++)
row << QVariant(QVariant::String);
// Assign argument values
query->setArgs(row.mid(0, colCount));
if (!query->execute())
{
if (config->ignoreErrors)
{
qDebug() << "Could not import data row number" << (rowCount+1) << ". The row was ignored. Problem details:"
<< query->getErrorText();
notifyWarn(tr("Could not import data row number %1. The row was ignored. Problem details: %2")
.arg(QString::number(rowCount + 1), query->getErrorText()));
}
else
{
error(tr("Error while importing data: %1").arg(query->getErrorText()));
return false;
}
}
if ((rowCount % 100) == 0 && isInterrupted())
{
error(tr("Error while importing data: %1").arg(tr("Interrupted.", "import process status update")));
return false;
}
rowCount++;
}
return true;
}
bool ImportWorker::isInterrupted()
{
QMutexLocker locker(&interruptMutex);
return interrupted;
}
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