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+// SPDX-License-Identifier: GPL-3.0-only
+// SPDX-FileCopyrightText: 2026 Project Tick
+// SPDX-FileContributor: Project Tick Team
+/*
+ * ProjT Launcher - Minecraft Launcher
+ * Copyright (C) 2026 Project Tick
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, write to the Free Software Foundation,
+ * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ */
+
+#pragma once
+
+#include <QDateTime>
+#include <QJsonObject>
+#include <QObject>
+#include <memory>
+
+#include "BaseEntity.hpp"
+#include "BaseVersion.h"
+#include "JsonFormat.hpp"
+#include "Version.h"
+#include "minecraft/VersionFile.h"
+
+namespace projt::meta
+{
+
+ /**
+ * @brief Single version entry in the metadata system.
+ */
+ class MetaVersion : public QObject, public BaseVersion, public MetaEntity
+ {
+ Q_OBJECT
+
+ public:
+ using Ptr = std::shared_ptr<MetaVersion>;
+
+ MetaVersion(const QString& componentUid, const QString& versionId);
+ ~MetaVersion() override = default;
+
+ // BaseVersion interface
+ QString descriptor() const override
+ {
+ return m_versionId;
+ }
+ QString name() const override;
+ QString typeString() const override
+ {
+ return m_releaseType;
+ }
+
+ // Identity
+ QString componentUid() const
+ {
+ return m_componentUid;
+ }
+ QString versionId() const
+ {
+ return m_versionId;
+ }
+
+ // Release info
+ QString releaseType() const
+ {
+ return m_releaseType;
+ }
+ QDateTime releaseTime() const;
+ qint64 releaseTimestamp() const
+ {
+ return m_timestamp;
+ }
+
+ // Flags
+ bool isStable() const
+ {
+ return m_stable;
+ }
+ bool isVolatile() const
+ {
+ return m_volatile;
+ }
+
+ // Dependencies
+ const DependencySet& dependencies() const
+ {
+ return m_dependencies;
+ }
+ const DependencySet& conflicts() const
+ {
+ return m_conflicts;
+ }
+ QString parentComponentVersion() const;
+
+ // Detailed data
+ bool hasDetailedData() const
+ {
+ return m_detailedData != nullptr;
+ }
+ const VersionFilePtr& detailedData() const
+ {
+ return m_detailedData;
+ }
+ bool isFullyLoaded() const
+ {
+ return hasDetailedData() && isReady();
+ }
+
+ // MetaEntity interface
+ QString cacheFilePath() const override;
+ void loadFromJson(const QJsonObject& json) override;
+
+ // Version comparison
+ ::Version asComparableVersion() const
+ {
+ return ::Version(m_versionId);
+ }
+
+ // Merge operations
+ void updateFrom(const MetaVersion::Ptr& source);
+ void updateMetadataFrom(const MetaVersion::Ptr& source);
+
+ public: // Setters for parsers
+ void setReleaseType(const QString& type);
+ void setReleaseTimestamp(qint64 ts);
+ void setDependencies(const DependencySet& deps, const DependencySet& conflicts);
+ void setStable(bool stable);
+ void setVolatile(bool vol);
+ void setDetailedData(const VersionFilePtr& data);
+ void markAsStableCandidate();
+
+ signals:
+ void releaseTypeChanged();
+ void timestampChanged();
+ void dependenciesChanged();
+
+ private:
+ QString m_componentUid;
+ QString m_versionId;
+ QString m_releaseType;
+ qint64 m_timestamp = 0;
+
+ bool m_stable = false;
+ bool m_volatile = false;
+ bool m_providesStability = false;
+
+ DependencySet m_dependencies;
+ DependencySet m_conflicts;
+
+ VersionFilePtr m_detailedData;
+ };
+
+} // namespace projt::meta
+
+Q_DECLARE_METATYPE(projt::meta::MetaVersion::Ptr)