Add 'meshmc/' from commit 'fad6a1066616b69d7f5fef01178efdf014c59537'

git-subtree-dir: meshmc
git-subtree-mainline: 934382c8a1ce738589dee9ee0f14e1cec812770e
git-subtree-split: fad6a1066616b69d7f5fef01178efdf014c59537

1 files changed, 117 insertions, 0 deletions

diff --git a/meshmc/launcher/minecraft/Rule.h b/meshmc/launcher/minecraft/Rule.h
new file mode 100644
index 0000000000..fa36b73b94
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+++ b/meshmc/launcher/minecraft/Rule.h
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+/* SPDX-FileCopyrightText: 2026 Project Tick
+ * SPDX-FileContributor: Project Tick
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ *
+ *   MeshMC - A Custom Launcher for Minecraft
+ *   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, either version 3 of the License, or
+ *   (at your option) any later version.
+ *
+ *   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, see <https://www.gnu.org/licenses/>.
+ *
+ *  This file incorporates work covered by the following copyright and
+ *  permission notice:
+ *
+ * Copyright 2013-2021 MultiMC Contributors
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#pragma once
+
+#include <QString>
+#include <QList>
+#include <QJsonObject>
+#include <memory>
+#include "OpSys.h"
+
+class Library;
+class Rule;
+
+enum RuleAction { Allow, Disallow, Defer };
+
+QList<std::shared_ptr<Rule>>
+rulesFromJsonV4(const QJsonObject& objectWithRules);
+
+class Rule
+{
+  protected:
+	RuleAction m_result;
+	virtual bool applies(const Library* parent) = 0;
+
+  public:
+	Rule(RuleAction result) : m_result(result) {}
+	virtual ~Rule() {};
+	virtual QJsonObject toJson() = 0;
+	RuleAction apply(const Library* parent)
+	{
+		if (applies(parent))
+			return m_result;
+		else
+			return Defer;
+	}
+};
+
+class OsRule : public Rule
+{
+  private:
+	// the OS
+	OpSys m_system;
+	// the OS version regexp
+	QString m_version_regexp;
+
+  protected:
+	virtual bool applies(const Library*)
+	{
+		return (m_system == currentSystem);
+	}
+	OsRule(RuleAction result, OpSys system, QString version_regexp)
+		: Rule(result), m_system(system), m_version_regexp(version_regexp)
+	{
+	}
+
+  public:
+	virtual QJsonObject toJson();
+	static std::shared_ptr<OsRule> create(RuleAction result, OpSys system,
+										  QString version_regexp)
+	{
+		return std::shared_ptr<OsRule>(
+			new OsRule(result, system, version_regexp));
+	}
+};
+
+class ImplicitRule : public Rule
+{
+  protected:
+	virtual bool applies(const Library*)
+	{
+		return true;
+	}
+	ImplicitRule(RuleAction result) : Rule(result) {}
+
+  public:
+	virtual QJsonObject toJson();
+	static std::shared_ptr<ImplicitRule> create(RuleAction result)
+	{
+		return std::shared_ptr<ImplicitRule>(new ImplicitRule(result));
+	}
+};