1 files changed, 162 insertions, 0 deletions
diff --git a/src/content/mods.h b/src/content/mods.h
new file mode 100644
index 000000000..a7cad07cf
--- /dev/null
+++ b/src/content/mods.h
@@ -0,0 +1,162 @@
+/*
+Minetest
+Copyright (C) 2013 celeron55, Perttu Ahola <celeron55@gmail.com>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser 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 "irrlichttypes.h"
+#include <list>
+#include <set>
+#include <vector>
+#include <string>
+#include <map>
+#include <json/json.h>
+#include <unordered_set>
+#include "util/basic_macros.h"
+#include "config.h"
+#include "metadata.h"
+
+#define MODNAME_ALLOWED_CHARS "abcdefghijklmnopqrstuvwxyz0123456789_"
+
+struct ModSpec
+{
+	std::string name;
+	std::string author;
+	std::string path;
+	std::string desc;
+
+	// if normal mod:
+	std::unordered_set<std::string> depends;
+	std::unordered_set<std::string> optdepends;
+	std::unordered_set<std::string> unsatisfied_depends;
+
+	bool part_of_modpack = false;
+	bool is_modpack = false;
+
+	// if modpack:
+	std::map<std::string, ModSpec> modpack_content;
+	ModSpec(const std::string &name = "", const std::string &path = "") :
+			name(name), path(path)
+	{
+	}
+	ModSpec(const std::string &name, const std::string &path, bool part_of_modpack) :
+			name(name), path(path), part_of_modpack(part_of_modpack)
+	{
+	}
+};
+
+// Retrieves depends, optdepends, is_modpack and modpack_content
+void parseModContents(ModSpec &mod);
+
+std::map<std::string, ModSpec> getModsInPath(
+		const std::string &path, bool part_of_modpack = false);
+
+// replaces modpack Modspecs with their content
+std::vector<ModSpec> flattenMods(std::map<std::string, ModSpec> mods);
+
+// a ModConfiguration is a subset of installed mods, expected to have
+// all dependencies fullfilled, so it can be used as a list of mods to
+// load when the game starts.
+class ModConfiguration
+{
+public:
+	// checks if all dependencies are fullfilled.
+	bool isConsistent() const { return m_unsatisfied_mods.empty(); }
+
+	const std::vector<ModSpec> &getMods() const { return m_sorted_mods; }
+
+	const std::vector<ModSpec> &getUnsatisfiedMods() const
+	{
+		return m_unsatisfied_mods;
+	}
+
+	void printUnsatisfiedModsError() const;
+
+protected:
+	ModConfiguration(const std::string &worldpath);
+	// adds all mods in the given path. used for games, modpacks
+	// and world-specific mods (worldmods-folders)
+	void addModsInPath(const std::string &path);
+
+	// adds all mods in the set.
+	void addMods(const std::vector<ModSpec> &new_mods);
+
+	void addModsFromConfig(const std::string &settings_path,
+			const std::set<std::string> &mods);
+
+	void checkConflictsAndDeps();
+
+protected:
+	// list of mods sorted such that they can be loaded in the
+	// given order with all dependencies being fullfilled. I.e.,
+	// every mod in this list has only dependencies on mods which
+	// appear earlier in the vector.
+	std::vector<ModSpec> m_sorted_mods;
+
+private:
+	// move mods from m_unsatisfied_mods to m_sorted_mods
+	// in an order that satisfies dependencies
+	void resolveDependencies();
+
+	// mods with unmet dependencies. Before dependencies are resolved,
+	// this is where all mods are stored. Afterwards this contains
+	// only the ones with really unsatisfied dependencies.
+	std::vector<ModSpec> m_unsatisfied_mods;
+
+	// set of mod names for which an unresolved name conflict
+	// exists. A name conflict happens when two or more mods
+	// at the same level have the same name but different paths.
+	// Levels (mods in higher levels override mods in lower levels):
+	// 1. game mod in modpack; 2. game mod;
+	// 3. world mod in modpack; 4. world mod;
+	// 5. addon mod in modpack; 6. addon mod.
+	std::unordered_set<std::string> m_name_conflicts;
+
+	// Deleted default constructor
+	ModConfiguration() = default;
+};
+
+#ifndef SERVER
+class ClientModConfiguration : public ModConfiguration
+{
+public:
+	ClientModConfiguration(const std::string &path);
+};
+#endif
+
+class ModMetadata : public Metadata
+{
+public:
+	ModMetadata() = delete;
+	ModMetadata(const std::string &mod_name);
+	~ModMetadata() = default;
+
+	virtual void clear();
+
+	bool save(const std::string &root_path);
+	bool load(const std::string &root_path);
+
+	bool isModified() const { return m_modified; }
+	const std::string &getModName() const { return m_mod_name; }
+
+	virtual bool setString(const std::string &name, const std::string &var);
+
+private:
+	std::string m_mod_name;
+	bool m_modified = false;
+};