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#include "scriptingsql.h"
#include "common/unused.h"
#include "db/db.h"
#include "db/sqlquery.h"
#include "services/dbmanager.h"
#include "common/utils_sql.h"
ScriptingSql::ScriptingSql()
{
}
ScriptingSql::~ScriptingSql()
{
}
QString ScriptingSql::getLanguage() const
{
return "SQL";
}
ScriptingPlugin::Context* ScriptingSql::createContext()
{
SqlContext* ctx = new SqlContext();
contexts << ctx;
return ctx;
}
void ScriptingSql::releaseContext(ScriptingPlugin::Context* context)
{
if (!contexts.contains(context))
return;
delete context;
contexts.removeOne(context);
}
void ScriptingSql::resetContext(ScriptingPlugin::Context* context)
{
dynamic_cast<SqlContext*>(context)->errorText.clear();
}
QVariant ScriptingSql::evaluate(ScriptingPlugin::Context* context, const QString& code, const FunctionInfo& funcInfo, const QList<QVariant>& args, Db* db, bool locking)
{
SqlContext* ctx = dynamic_cast<SqlContext*>(context);
ctx->errorText.clear();
Db* theDb = nullptr;
if (db && db->isValid())
theDb = db;
else if (memDb)
theDb = memDb;
else
return QVariant();
Db::Flags execFlags;
if (!locking)
execFlags |= Db::Flag::NO_LOCK;
QString sql = code;
if (ctx->variables.size() > 0)
{
QList<QString> keys = ctx->variables.keys();
std::sort(keys.begin(), keys.end(), std::greater<QString>());
for (const QString& key : keys)
{
QString value = "'" + ctx->variables[key].toString() + "'";
sql.replace(":" + key, value).replace("@" + key, value).replace("$" + key, value);
}
}
replaceNamedArgs(sql, funcInfo, args);
SqlQueryPtr result = theDb->exec(sql, args, execFlags);
if (result->isError())
{
dynamic_cast<SqlContext*>(context)->errorText = result->getErrorText();
return QVariant();
}
return result->getSingleCell();
}
QVariant ScriptingSql::evaluate(const QString& code, const FunctionInfo& funcInfo, const QList<QVariant>& args, Db* db, bool locking, QString* errorMessage)
{
Db* theDb = nullptr;
if (db && db->isValid())
theDb = db;
else if (memDb)
theDb = memDb;
else
return QVariant();
Db::Flags execFlags;
if (!locking)
execFlags |= Db::Flag::NO_LOCK;
QString sql = code;
replaceNamedArgs(sql, funcInfo, args);
SqlQueryPtr result = theDb->exec(sql, args, execFlags);
if (result->isError())
{
*errorMessage = result->getErrorText();
return QVariant();
}
return result->getSingleCell();
}
void ScriptingSql::setVariable(ScriptingPlugin::Context* context, const QString& name, const QVariant& value)
{
dynamic_cast<SqlContext*>(context)->variables[name] = value;
}
QVariant ScriptingSql::getVariable(ScriptingPlugin::Context* context, const QString& name)
{
if (dynamic_cast<SqlContext*>(context)->variables.contains(name))
return dynamic_cast<SqlContext*>(context)->variables[name];
return QVariant();
}
bool ScriptingSql::hasError(ScriptingPlugin::Context* context) const
{
return !getErrorMessage(context).isNull();
}
QString ScriptingSql::getErrorMessage(ScriptingPlugin::Context* context) const
{
return dynamic_cast<SqlContext*>(context)->errorText;
}
QString ScriptingSql::getIconPath() const
{
return ":/images/plugins/scriptingsql.png";
}
bool ScriptingSql::init()
{
memDb = DBLIST->createInMemDb();
return memDb != nullptr;
}
void ScriptingSql::deinit()
{
for (Context* context : contexts)
delete context;
contexts.clear();
safe_delete(memDb);
}
void ScriptingSql::replaceNamedArgs(QString& sql, const ScriptingPlugin::FunctionInfo& funcInfo, const QList<QVariant>& args)
{
// First build map of argName to its value in order in which arguments were passed to the function
int i = 0;
QStringList argNames = funcInfo.getArguments();
QHash<QString, QString> argMap;
for (const QString& argName : argNames)
{
if (i >= args.size())
break;
argMap[argName] = valueToSqlLiteral(args[i++]);
}
// Then sort arguments in alphabetically descending order, to prevent replacing shorter names first
// and proceed with argument substitutions
std::sort(argNames.begin(), argNames.end(), std::greater<QString>());
for (const QString& argName : argNames)
{
QString value = argMap[argName];
sql.replace(":" + argName, value)
.replace("@" + argName, value)
.replace("$" + argName, value);
}
}
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