// Copyright 2005-2020 The Mumble Developers. All rights reserved.
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file at the root of the
// Mumble source tree or at <https://www.mumble.info/LICENSE>.

#ifndef MUMBLE_ACL_H_
#define MUMBLE_ACL_H_

#include <QtCore/QHash>
#include <QtCore/QObject>

class Channel;
class User;
class ServerUser;

class ChanACL : public QObject {
private:
	Q_OBJECT
	Q_DISABLE_COPY(ChanACL)
public:
	enum Perm {
		None            = 0x0,
		Write           = 0x1,
		Traverse        = 0x2,
		Enter           = 0x4,
		Speak           = 0x8,
		MuteDeafen      = 0x10,
		Move            = 0x20,
		MakeChannel     = 0x40,
		LinkChannel     = 0x80,
		Whisper         = 0x100,
		TextMessage     = 0x200,
		MakeTempChannel = 0x400,
		Listen          = 0x800,

		// Root channel only
		Kick             = 0x10000,
		Ban              = 0x20000,
		Register         = 0x40000,
		SelfRegister     = 0x80000,
		ResetUserContent = 0x100000,

		Cached = 0x8000000,
		All = Write + Traverse + Enter + Speak + MuteDeafen + Move + MakeChannel + LinkChannel + Whisper + TextMessage
			  + MakeTempChannel + Listen + Kick + Ban + Register + SelfRegister + ResetUserContent
	};

	Q_DECLARE_FLAGS(Permissions, Perm)

	typedef QHash< Channel *, Permissions > ChanCache;
	typedef QHash< User *, ChanCache * > ACLCache;

	Channel *c;
	bool bApplyHere;
	bool bApplySubs;

	bool bInherited;

	int iUserId;
	QString qsGroup;
	Permissions pAllow;
	Permissions pDeny;

	ChanACL(Channel *c);

	/// @returns Whether the given ChanACL represents a password.
	bool isPassword() const;

	/// @ereturns A string representation of this ChanACL summarizing what permissions are granted or denied.
	/// 	If this ACL neither grants nor denies any permissions, an empty String is returned.
	explicit operator QString() const;

#ifdef MURMUR
	static bool hasPermission(ServerUser *p, Channel *c, QFlags< Perm > perm, ACLCache *cache);
	static QFlags< Perm > effectivePermissions(ServerUser *p, Channel *c, ACLCache *cache);
#else
	static QString whatsThis(Perm p);
#endif
	static QString permName(QFlags< Perm > p);
	static QString permName(Perm p);
};

Q_DECLARE_OPERATORS_FOR_FLAGS(ChanACL::Permissions)

#endif