/**

 * ===============================================================

 * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

 * ===============================================================

 *

 *  This file is part of the SourceMod/SourcePawn SDK.  This file may only be used 

 * or modified under the Terms and Conditions of its License Agreement, which is found 

 * in LICENSE.txt.  The Terms and Conditions for making SourceMod extensions/plugins 

 * may change at any time.  To view the latest information, see:

 *   http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

#ifndef _INCLUDE_SOURCEMOD_ADMINISTRATION_SYSTEM_H_

#define _INCLUDE_SOURCEMOD_ADMINISTRATION_SYSTEM_H_

#include <IShareSys.h>

#define SMINTERFACE_ADMINSYS_NAME		"IAdminSys"

#define SMINTERFACE_ADMINSYS_VERSION	1

/**

 * @file IAdminSystem.h

 * @brief Defines the interface to manage the Admin Users/Groups and Override caches.

 *

 *   The administration system is more of a volatile cache than a system.  It is designed to be 

 * temporary rather than permanent, in order to compensate for more storage methods.  For example,

 * a flat file might be read into the cache all at once.  But a MySQL-based system might only cache

 * admin permissions when that specific admin connects.  

 *

 *   The override cache is the simplest to explain.  Any time an override is added, any existing 

 * and all future commands will gain a new access level set by the override.  If unset, the default

 * access level is restored.  This cache is dynamically changeable.

 *

 *   The group cache contains, for each group:

 *	1] A set of inherent flags - fully readable/writable.

 *  2] An immunity table - insertion and retrieval only.

 *  3] An override table - insertion and retrieval only.

 *   Individual groups can be invalidated entirely.  It should be considered an expensive

 *  operation, since each admin needs to be patched up to not reference the group.

 */

namespace SourceMod

{

	/**

	 * @brief Access levels (flags) for admins.

	 */

	enum AdminFlag

	{

		Admin_None = 0,

		Admin_Reservation,		/**< Reserved slot */

		Admin_Kick,				/**< Kick another user */

		Admin_Ban,				/**< Ban another user */

		Admin_Unban,			/**< Unban another user */

		Admin_Slay,				/**< Slay/kill/damage another user */

		Admin_Changemap,		/**< Change the map */

		Admin_Convars,			/**< Change basic convars */

		Admin_Configs,			/**< Change configs */

		Admin_Chat,				/**< Special chat privileges */

		Admin_Vote,				/**< Special vote privileges */

		Admin_Password,			/**< Set a server password */

		Admin_RCON,				/**< Use RCON */

		Admin_Cheats,			/**< Change sv_cheats and use its commands */

		Admin_Root,				/**< All access by default */

		/* --- */

		AdminFlags_TOTAL,

	};

	/**

	 * @brief Specifies which type of command to override (command or command group).

	 */

	enum OverrideType

	{

		Override_Command = 1,	/**< Command */

		Override_CommandGroup,	/**< Command group */

	};

	/**

	 * @brief Specifies how a command is overridden for a user group.

	 */

	enum OverrideRule

	{

		Command_Deny = 0,		/**< Deny access */

		Command_Allow = 1,		/**< Allow access */

	};

	/**

	 * @brief Specifies a generic immunity type.

	 */

	enum ImmunityType

	{

		Immunity_Default = 1,	/**< Immune from everyone with no immunity */

		Immunity_Global,		/**< Immune from everyone (except root admins) */

	};

	/**

	 * @brief Represents an index to one group.

	 */

	typedef int		GroupId;

	#define ADMIN_CACHE_OVERRIDES	(1<<0)

	#define ADMIN_CACHE_ADMINS		(1<<1)

	#define ADMIN_CACHE_GROUPS		((1<<2)|ADMIN_CACHE_ADMINS)

	/**

	 * @brief Represents an invalid/nonexistant group or an erroneous operation.

	 */

	#define INVALID_GROUP_ID	-1

	/**

	 * @brief Provides callbacks for admin cache operations.

	 */

	class IAdminListener

	{

	public:

		/**

		 * Called when part of the admin cache needs to be rebuilt.  

		 * Groups should always be rebuilt before admins.

		 *

		 * @param cache_flags	Flags for which cache to dump.

		 */

		virtual void OnRebuildAdminCache(int cache_flags) =0;

	};

	/**

	 * @brief Provides functions for manipulating the admin options cache.

	 */

	class IAdminSystem : public SMInterface

	{

	public:

		const char *GetInterfaceName()

		{

			return SMINTERFACE_ADMINSYS_NAME;

		}

		unsigned int GetInterfaceVersion()

		{

			return SMINTERFACE_ADMINSYS_VERSION;

		}

	public:

		/**

		 * @brief Adds a global command flag override.  Any command registered with this name

		 * will assume the new flag.  This is applied retroactively as well.

		 *

		 * @param cmd			String containing command name (case sensitive).

		 * @param type			Override type (specific command or group).

		 * @param flag			New admin flag.

		 */

		virtual void AddCommandOverride(const char *cmd, OverrideType type, AdminFlag flag) =0;

		/**

		 * @brief Returns a command override.

		 *

		 * @param cmd			String containing command name (case sensitive).

		 * @param type			Override type (specific command or group).

		 * @param pFlag			Optional pointer to the set flag.

		 * @return				True if there is an override, false otherwise.

		 */

		virtual bool GetCommandOverride(const char *cmd, OverrideType type, AdminFlag *pFlag) =0;

		/**

		 * @brief Unsets a command override.

		 *

		 * @param cmd			String containing command name (case sensitive).

		 * @param type			Override type (specific command or group).

		 */

		virtual void UnsetCommandOverride(const char *cmd, OverrideType type) =0;

		/**

		 * @brief Adds a new group.  Name must be unique.

		 *

		 * @param group_name	String containing the group name.

		 * @return				A new group id, INVALID_GROUP_ID if it already exists.

		 */

		virtual GroupId AddGroup(const char *group_name) =0;

		/**

		 * @brief Finds a group by name.

		 *

		 * @param group_name	String containing the group name.

		 * @return				A group id, or INVALID_GROUP_ID if not found.

		 */

		virtual GroupId FindGroupByName(const char *group_name) =0;

		/**

		 * @brief Adds or removes a flag from a group's flag set.

		 * Note: These are called "add flags" because they add to a user's flags.

		 *

		 * @param id			Group id.

		 * @param flag			Admin flag to toggle.

		 * @param enabled		True to set the flag, false to unset/disable.

		 */

		virtual void SetGroupAddFlag(GroupId id, AdminFlag flag, bool enabled) =0;

		/**

		 * @brief Gets the set value of an add flag on a group's flag set.

		 *

		 * @param id			Group id.

		 * @param flag			Admin flag to retrieve.

		 * @return				True if enabled, false otherwise,

		 */

		virtual bool GetGroupAddFlag(GroupId id, AdminFlag flag) =0;

		/**

		 * @brief Returns an array of flag bits that are added to a user from their group.

		 * Note: These are called "add flags" because they add to a user's flags.

		 *

		 * @param id			GroupId of the group.

		 * @param flags			Array to store flags bits in.

		 * @param total			Total number of flags that can be stored in the array.

		 * @return				Number of flags that were written to the array.

		 */

		virtual unsigned int GetGroupAddFlagBits(GroupId id, bool flags[], unsigned int total) =0;

		/**

		 * @brief Toggles a generic immunity type.

		 *

		 * @param id			Group id.

		 * @param type			Generic immunity type.

		 * @param enabled		True to enable, false otherwise.

		 */

		virtual void SetGroupGenericImmunity(GroupId id, ImmunityType type, bool enabled) =0;

		/**

		 * @brief Returns whether or not a group has global immunity.

		 *

		 * @param id			Group id.

		 * @param type			Generic immunity type.

		 * @return				True if the group has this immunity, false otherwise.

		 */

		virtual bool GetGroupGenericImmunity(GroupId id, ImmunityType type) =0;

		/**

		 * @brief Adds immunity to a specific group.

		 *

		 * @param id			Group id.

		 * @param other_id		Group id to receive immunity to.

		 */

		virtual void AddGroupImmunity(GroupId id, GroupId other_id) =0;

		/**

		 * @brief Returns the number of specific group immunities.

		 *

		 * @param id			Group id.

		 * @return				Number of group immunities.

		 */

		virtual unsigned int GetGroupImmunityCount(GroupId id) =0;

		/**

		 * @brief Returns a group that this group is immune to given an index.

		 *

		 * @param id			Group id.

		 * @param number		Index from 0 to N-1, from GetGroupImmunities().

		 * @return				GroupId that this group is immune to.

		 */

		virtual GroupId GetGroupImmunity(GroupId id, unsigned int number) =0;

		/**

		 * @brief Adds a group-specific override type.

		 *

		 * @param id			Group id.

		 * @param name			String containing command name (case sensitive).

		 * @param type			Override type (specific command or group).

		 * @param rule			Override allow/deny setting.

		 */

		virtual void AddGroupCommandOverride(GroupId id,

											 const char *name,

											 OverrideType type,

											 OverrideRule rule) =0;

		/**

		 * @brief Retrieves a group-specific command override.

		 *

		 * @param id			Group id.

		 * @param name			String containing command name (case sensitive).

		 * @param type			Override type (specific command or group).

		 * @param pRule			Optional pointer to store allow/deny setting.

		 * @return				True if an override exists, false otherwise.

		 */

		virtual bool GetGroupCommandOverride(GroupId id,

											 const char *name,

											 OverrideType type,

											 OverrideRule *pRule) =0;

		/**

		 * @brief Invalidates and removes a group from the group cache.

		 *

		 * @param id			Group id.

		 */

		virtual void InvalidateGroup(GroupId id) =0;

		/**

		 * @brief Tells the admin system to dump a portion of the cache.  

		 * This calls into plugin forwards to rebuild the cache.

		 *

		 * @param cache_flags	Flags for which cache to dump.  Specifying groups also dumps admins.

		 * @param rebuild		If true, the rebuild forwards/events will fire.

		 */

		virtual void DumpAdminCache(int cache_flags, bool rebuild) =0;

		/**

		 * @brief Adds an admin interface listener.

		 *

		 * @param pListener		Pointer to an IAdminListener to add.

		 */

		virtual void AddAdminListener(IAdminListener *pListener) =0;

		/**

		 * @brief Removes an admin interface listener.

		 *

		 * @param pListener		Pointer to an IAdminListener to remove.

		 */

		virtual void RemoveAdminListener(IAdminListener *pListener) =0;

	};

};

#endif //_INCLUDE_SOURCEMOD_ADMINISTRATION_SYSTEM_H_