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#include "scriptingqt.h"
#include "common/global.h"
#include "scriptingqtdbproxy.h"
#include "services/notifymanager.h"
#include <QJSEngine>
#include <QMutex>
#include <QMutexLocker>
#include <QDebug>
ScriptingQt::ScriptingQt()
{
managedMainContextsMutex = new QMutex();
}
ScriptingQt::~ScriptingQt()
{
safe_delete(managedMainContextsMutex);
}
QJSValueList ScriptingQt::toValueList(QJSEngine* engine, const QList<QVariant>& values)
{
QJSValueList result;
for (const QVariant& value : values)
result << engine->toScriptValue(value);
return result;
}
QString ScriptingQt::getLanguage() const
{
return QStringLiteral("JavaScript");
}
ScriptingPlugin::Context* ScriptingQt::createContext()
{
ContextQt* ctx = new ContextQt;
contexts << ctx;
return ctx;
}
void ScriptingQt::releaseContext(ScriptingPlugin::Context* context)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
contexts.removeOne(ctx);
delete ctx;
}
void ScriptingQt::resetContext(ScriptingPlugin::Context* context)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
}
QVariant ScriptingQt::evaluate(const QString& code, const FunctionInfo& funcInfo, const QList<QVariant>& args, Db* db, bool locking, QString* errorMessage)
{
// Call the function
ContextQt* context = getMainContext();
QVariant result = evaluate(context, code, funcInfo, args, db, locking);
// Handle errors
if (!context->error.isEmpty())
*errorMessage = context->error;
return result;
}
QVariant ScriptingQt::evaluate(ScriptingPlugin::Context* context, const QString& code, const FunctionInfo& funcInfo, const QList<QVariant>& args, Db* db, bool locking)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QVariant();
return evaluate(ctx, code, funcInfo, args, db, locking);
}
QVariant ScriptingQt::evaluate(ContextQt* ctx, const QString& code, const FunctionInfo& funcInfo, const QList<QVariant>& args, Db* db, bool locking)
{
// Define function to call
QJSValue functionValue = getFunctionValue(ctx, code, funcInfo);
// Db for this evaluation
ctx->dbProxy->setDb(db);
ctx->dbProxy->setUseDbLocking(locking);
// Call the function
QJSValue result;
if (args.size() > 0)
result = functionValue.call(toValueList(ctx->engine, args));
else
result = functionValue.call();
// Handle errors
ctx->error.clear();
if (result.isError())
{
ctx->error = QString("Uncaught exception at line %1: %2").arg(
result.property("lineNumber").toString(),
result.toString());
}
ctx->dbProxy->setDb(nullptr);
ctx->dbProxy->setUseDbLocking(false);
return convertVariant(result.toVariant());
}
ScriptingQt::ContextQt* ScriptingQt::getMainContext()
{
if (mainContext.hasLocalData())
return mainContext.localData();
ContextQt* context = new ContextQt();
mainContext.setLocalData(context);
QMutexLocker locker(managedMainContextsMutex);
managedMainContexts << context;
return context;
}
QVariant ScriptingQt::convertVariant(const QVariant& value, bool wrapStrings)
{
switch (value.type())
{
case QVariant::Hash:
{
QHash<QString, QVariant> hash = value.toHash();
QHashIterator<QString, QVariant> it(hash);
QStringList list;
while (it.hasNext())
{
it.next();
list << it.key() + ": " + convertVariant(it.value(), true).toString();
}
return "{" + list.join(", ") + "}";
}
case QVariant::Map:
{
QMap<QString, QVariant> map = value.toMap();
QMapIterator<QString, QVariant> it(map);
QStringList list;
while (it.hasNext())
{
it.next();
list << it.key() + ": " + convertVariant(it.value(), true).toString();
}
return "{" + list.join(", ") + "}";
}
case QVariant::List:
{
QStringList list;
for (QVariant& var : value.toList())
list << convertVariant(var, true).toString();
return "[" + list.join(", ") + "]";
}
case QVariant::StringList:
{
return "[\"" + value.toStringList().join("\", \"") + "\"]";
}
case QVariant::String:
{
if (wrapStrings)
return "\"" + value.toString() + "\"";
break;
}
default:
break;
}
return value;
}
void ScriptingQt::setVariable(ScriptingPlugin::Context* context, const QString& name, const QVariant& value)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return;
ctx->engine->globalObject().setProperty(name, ctx->engine->toScriptValue(value));
}
QVariant ScriptingQt::getVariable(ScriptingPlugin::Context* context, const QString& name)
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QVariant();
QJSValue value = ctx->engine->globalObject().property(name);
return convertVariant(value.toVariant());
}
bool ScriptingQt::hasError(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = getContext(context);
if (!ctx)
return false;
return !ctx->error.isEmpty();
}
QString ScriptingQt::getErrorMessage(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = getContext(context);
if (!ctx)
return QString();
return ctx->error;
}
QString ScriptingQt::getIconPath() const
{
return ":/images/plugins/scriptingqt.png";
}
bool ScriptingQt::init()
{
return true;
}
void ScriptingQt::deinit()
{
for (Context*& ctx : contexts)
delete ctx;
contexts.clear();
QMutexLocker locker(managedMainContextsMutex);
for (ContextQt*& ctx : managedMainContexts)
{
#if QT_VERSION >= QT_VERSION_CHECK(5, 14, 0)
ctx->engine->setInterrupted(true);
#else
// FIXME No way to cleanly interrupt QJSEngine before Qt 5.14
#endif
delete ctx;
}
managedMainContexts.clear();
}
ScriptingQt::ContextQt* ScriptingQt::getContext(ScriptingPlugin::Context* context) const
{
ContextQt* ctx = dynamic_cast<ContextQt*>(context);
if (!ctx)
qDebug() << "Invalid context passed to ScriptingQt:" << context;
return ctx;
}
QJSValue ScriptingQt::getFunctionValue(ContextQt* ctx, const QString& code, const FunctionInfo& funcInfo)
{
static const QString fnDef = QStringLiteral("(function (%1) {%2\n})");
QString fullCode = fnDef.arg(funcInfo.getArguments().join(", "), code);
QJSValue* func = ctx->scriptCache[fullCode];
if (func)
return *func;
func = new QJSValue(ctx->engine->evaluate(fullCode));
ctx->scriptCache.insert(fullCode, func);
return *func;
}
ScriptingQt::ContextQt::ContextQt()
{
engine = new QJSEngine();
engine->installExtensions(QJSEngine::ConsoleExtension);
dbProxy = new ScriptingQtDbProxy(engine);
dbProxyScriptValue = engine->newQObject(dbProxy);
console = new ScriptingQtConsole(engine);
engine->globalObject().setProperty("console", engine->newQObject(console));
engine->globalObject().setProperty("db", dbProxyScriptValue);
scriptCache.setMaxCost(cacheSize);
}
ScriptingQt::ContextQt::~ContextQt()
{
safe_delete(console);
safe_delete(dbProxy);
safe_delete(engine);
}
ScriptingQtConsole::ScriptingQtConsole(QJSEngine* engine) :
QObject(), engine(engine)
{
}
QJSValue ScriptingQtConsole::log(const QJSValue& value)
{
static_qstring(tpl, "[JS] %1");
NOTIFY_MANAGER->info(tpl.arg(ScriptingQt::convertVariant(value.toVariant()).toString()));
return QJSValue();
}
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