/*************************************************************************/
/*  regex.h                                                              */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
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/* distribute, sublicense, and/or sell copies of the Software, and to    */
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#ifndef REGEX_H
#define REGEX_H

#include "core/vector.h"
#include "core/ustring.h"
#include "core/dictionary.h"
#include "core/reference.h"
#include "core/resource.h"

class RegExNode;

class RegExMatch : public Reference {

	OBJ_TYPE(RegExMatch, Reference);

	struct Group {
		Variant name;
		int start;
		int length;
	};

	Vector<Group> captures;
	String string;

	friend class RegEx;
	friend class RegExSearch;
	friend class RegExNodeCapturing;
	friend class RegExNodeBackReference;

protected:

	static void _bind_methods();

public:

	String expand(const String& p_template) const;

	int get_group_count() const;
	Array get_group_array() const;

	Array get_names() const;
	Dictionary get_name_dict() const;

	String get_string(const Variant& p_name) const;
	int get_start(const Variant& p_name) const;
	int get_end(const Variant& p_name) const;

	RegExMatch();

};

class RegEx : public Resource {

	OBJ_TYPE(RegEx, Resource);

	RegExNode* root;
	Vector<Variant> group_names;
	String pattern;
	int lookahead_depth;

protected:

	static void _bind_methods();

public:

	void clear();
	Error compile(const String& p_pattern);

	Ref<RegExMatch> search(const String& p_text, int p_start = 0, int p_end = -1) const;
	String sub(const String& p_text, const String& p_replacement, bool p_all = false, int p_start = 0, int p_end = -1) const;

	bool is_valid() const;
	String get_pattern() const;
	int get_group_count() const;
	Array get_names() const;

	RegEx();
	RegEx(const String& p_pattern);
	~RegEx();

};

#endif // REGEX_H