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#include "chainexecutor.h"
#include "sqlerrorcodes.h"
#include "db/sqlquery.h"
#include <QDebug>
#include <QDateTime>
ChainExecutor::ChainExecutor(QObject *parent) :
QObject(parent)
{
}
bool ChainExecutor::getTransaction() const
{
return transaction;
}
void ChainExecutor::setTransaction(bool value)
{
transaction = value;
}
QStringList ChainExecutor::getQueries() const
{
return sqls;
}
void ChainExecutor::setQueries(const QStringList& value)
{
sqls = value;
queryParams.clear();
}
void ChainExecutor::exec()
{
if (!db)
{
emit finished(SqlQueryPtr());
emit failure(SqlErrorCode::DB_NOT_DEFINED, tr("The database for executing queries was not defined.", "chain executor"));
return;
}
if (!db->isOpen())
{
emit finished(SqlQueryPtr());
emit failure(SqlErrorCode::DB_NOT_OPEN, tr("The database for executing queries was not open.", "chain executor"));
return;
}
if (disableForeignKeys)
{
SqlQueryPtr result = db->exec("PRAGMA foreign_keys = 0;");
if (result->isError())
{
emit finished(SqlQueryPtr());
emit failure(db->getErrorCode(), tr("Could not disable foreign keys in the database. Details: %1", "chain executor").arg(db->getErrorText()));
return;
}
}
if (transaction && !db->begin())
{
emit finished(SqlQueryPtr());
emit failure(db->getErrorCode(), tr("Could not start a database transaction. Details: %1", "chain executor").arg(db->getErrorText()));
return;
}
currentSqlIndex = 0;
if (async)
executeCurrentSql();
else
executeSync();
}
void ChainExecutor::interrupt()
{
interrupted = true;
db->interrupt();
}
void ChainExecutor::executeCurrentSql()
{
if (currentSqlIndex >= sqls.size())
{
executionSuccessful(lastExecutionResults);
return;
}
if (interrupted)
{
executionFailure(SqlErrorCode::INTERRUPTED, tr("Interrupted", "chain executor"));
return;
}
asyncId = db->asyncExec(sqls[currentSqlIndex], queryParams, getExecFlags());
}
QList<bool> ChainExecutor::getMandatoryQueries() const
{
return mandatoryQueries;
}
void ChainExecutor::setMandatoryQueries(const QList<bool>& value)
{
mandatoryQueries = value;
}
Db* ChainExecutor::getDb() const
{
return db;
}
void ChainExecutor::setDb(Db* value)
{
if (db)
disconnect(db, SIGNAL(asyncExecFinished(quint32,SqlQueryPtr)), this, SLOT(handleAsyncResults(quint32,SqlQueryPtr)));
db = value;
if (db)
connect(db, SIGNAL(asyncExecFinished(quint32,SqlQueryPtr)), this, SLOT(handleAsyncResults(quint32,SqlQueryPtr)));
}
void ChainExecutor::handleAsyncResults(quint32 asyncId, SqlQueryPtr results)
{
if (asyncId != this->asyncId)
return;
if (!handleResults(results))
return;
currentSqlIndex++;
executeCurrentSql();
}
void ChainExecutor::executionFailure(int errorCode, const QString& errorText)
{
if (transaction)
db->rollback();
restoreFk();
successfulExecution = false;
executionErrors << ExecutionError(errorCode, errorText);
emit finished(lastExecutionResults);
emit failure(errorCode, errorText);
}
void ChainExecutor::executionSuccessful(SqlQueryPtr results)
{
if (transaction && !db->commit())
{
executionFailure(db->getErrorCode(), tr("Could not commit a database transaction. Details: %1", "chain executor").arg(db->getErrorText()));
return;
}
restoreFk();
successfulExecution = true;
emit finished(results);
emit success(results);
}
void ChainExecutor::executeSync()
{
Db::Flags flags = getExecFlags();
SqlQueryPtr results;
for (const QString& sql : sqls)
{
results = db->exec(sql, queryParams, flags);
if (!handleResults(results))
return;
currentSqlIndex++;
}
executionSuccessful(results);
}
bool ChainExecutor::handleResults(SqlQueryPtr results)
{
lastExecutionResults = results;
if (results->isError())
{
if (interrupted || currentSqlIndex >= mandatoryQueries.size() || mandatoryQueries[currentSqlIndex])
{
executionFailure(results->getErrorCode(), results->getErrorText());
return false;
}
}
return true;
}
Db::Flags ChainExecutor::getExecFlags() const
{
Db::Flags flags;
if (disableObjectDropsDetection)
flags |= Db::Flag::SKIP_DROP_DETECTION;
return flags;
}
void ChainExecutor::restoreFk()
{
if (disableForeignKeys)
{
SqlQueryPtr result = db->exec("PRAGMA foreign_keys = 1;");
if (result->isError())
qCritical() << "Could not restore foreign keys in the database after chain execution. Details:" << db->getErrorText();
}
}
bool ChainExecutor::getDisableObjectDropsDetection() const
{
return disableObjectDropsDetection;
}
void ChainExecutor::setDisableObjectDropsDetection(bool value)
{
disableObjectDropsDetection = value;
}
bool ChainExecutor::getDisableForeignKeys() const
{
return disableForeignKeys;
}
void ChainExecutor::setDisableForeignKeys(bool value)
{
disableForeignKeys = value;
}
bool ChainExecutor::getSuccessfulExecution() const
{
return successfulExecution;
}
void ChainExecutor::setParam(const QString ¶mName, const QVariant &value)
{
queryParams[paramName] = value;
}
bool ChainExecutor::getAsync() const
{
return async;
}
void ChainExecutor::setAsync(bool value)
{
async = value;
}
QStringList ChainExecutor::getErrorsMessages() const
{
QStringList msgs;
for (const ExecutionError& e : executionErrors)
msgs << e.second;
return msgs;
}
const QList<ChainExecutor::ExecutionError>& ChainExecutor::getErrors() const
{
return executionErrors;
}
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