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#ifndef FUNCTIONMANAGER_H
#define FUNCTIONMANAGER_H
#include "coreSQLiteStudio_global.h"
#include <QVariant>
#include <QList>
#include <QSharedPointer>
#include <QObject>
#include <QStringList>
#include <functional>
class Db;
class API_EXPORT FunctionManager : public QObject
{
Q_OBJECT
public:
struct API_EXPORT FunctionBase
{
enum Type
{
SCALAR = 0,
AGGREGATE = 1
};
FunctionBase();
virtual ~FunctionBase();
virtual QString toString() const;
static QString typeString(Type type);
static Type typeString(const QString& type);
QString name;
QStringList arguments;
Type type = SCALAR;
bool undefinedArgs = true;
bool deterministic = false;
};
struct API_EXPORT ScriptFunction : public FunctionBase
{
QString lang;
QString code;
QString initCode;
QString finalCode;
QStringList databases;
bool allDatabases = true;
};
struct API_EXPORT NativeFunction : public FunctionBase
{
typedef std::function<QVariant(const QList<QVariant>& args, Db* db, bool& ok)> ImplementationFunction;
ImplementationFunction functionPtr;
};
virtual void setScriptFunctions(const QList<ScriptFunction*>& newFunctions) = 0;
virtual QList<ScriptFunction*> getAllScriptFunctions() const = 0;
virtual QList<ScriptFunction*> getScriptFunctionsForDatabase(const QString& dbName) const = 0;
virtual QList<NativeFunction*> getAllNativeFunctions() const = 0;
virtual QVariant evaluateScalar(const QString& name, int argCount, const QList<QVariant>& args, Db* db, bool& ok) = 0;
virtual void evaluateAggregateInitial(const QString& name, int argCount, Db* db, QHash<QString, QVariant>& aggregateStorage) = 0;
virtual void evaluateAggregateStep(const QString& name, int argCount, const QList<QVariant>& args, Db* db,
QHash<QString, QVariant>& aggregateStorage) = 0;
virtual QVariant evaluateAggregateFinal(const QString& name, int argCount, Db* db, bool& ok, QHash<QString, QVariant>& aggregateStorage) = 0;
signals:
void functionListChanged();
};
#define FUNCTIONS SQLITESTUDIO->getFunctionManager()
#endif // FUNCTIONMANAGER_H
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