ScriptedAlgorithmLoader.h

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// SPDX-FileCopyrightText: 2026 fuddlesworth
// SPDX-License-Identifier: LGPL-2.1-or-later
 
#pragma once
 
#include <phosphortiles_export.h>
#include <PhosphorFsLoader/WatchedDirectorySet.h>
#include <QByteArray>
#include <QHash>
#include <QObject>
#include <QString>
 
#include <memory>
 
namespace PhosphorTiles {
 
class ITileAlgorithmRegistry;
class ScriptedAlgorithmWatchdog;
 
class PHOSPHORTILES_EXPORT ScriptedAlgorithmLoader : public QObject
{
    Q_OBJECT
 
public:
    explicit ScriptedAlgorithmLoader(const QString& subdirectory, ITileAlgorithmRegistry* registry,
                                     QObject* parent = nullptr);
    ~ScriptedAlgorithmLoader() override;
 
    void scanAndRegister(PhosphorFsLoader::LiveReload liveReload = PhosphorFsLoader::LiveReload::On);
 
    void ensureUserDirectoryExists();
 
    QString userAlgorithmDir() const;
 
Q_SIGNALS:
    void algorithmsChanged();
 
private:
    class JsScanStrategy;
    QStringList performScan(const QStringList& directoriesInScanOrder);
 
    void loadFromDirectory(const QString& dir, bool isUserDir, const QString& canonicalUserDir);
    QStringList algorithmDirectories() const;
    QStringList validatedJsFiles(const QString& dirPath, int maxFiles) const;
 
    QString m_subdirectory; 
    ITileAlgorithmRegistry* m_registry = nullptr; 
    std::shared_ptr<ScriptedAlgorithmWatchdog> m_watchdog;
    std::unique_ptr<JsScanStrategy> m_strategy;
    std::unique_ptr<PhosphorFsLoader::WatchedDirectorySet> m_watcher;
    QHash<QString, QString> m_scriptIdToPath; 
    QByteArray m_lastScriptSignature;
};
 
} // namespace PhosphorTiles