amxmodx/plugins/include/cstrike.inc

// vim: set ts=4 sw=4 tw=99 noet:
//
// AMX Mod X, based on AMX Mod by Aleksander Naszko ("OLO").
// Copyright (C) The AMX Mod X Development Team.
//
// This software is licensed under the GNU General Public License, version 3 or higher.
// Additional exceptions apply. For full license details, see LICENSE.txt or visit:
//     https://alliedmods.net/amxmodx-license

//
// Counter-Strike Functions
//

#if defined _cstrike_included
	#endinput
#endif
#define _cstrike_included

#pragma reqlib cstrike
#if !defined AMXMODX_NOAUTOLOAD
	#pragma loadlib cstrike
#endif

/**
 * @section Team and team model constants, used by cs_[get|set]_user_team().
 */

/**
 * Internal Counter-Strike model id constants.
 *
 * @note Model ids starting with CZ_ are only valid in Condition Zero.
 */
enum CsInternalModel
{
	CS_DONTCHANGE = 0,
	CS_CT_URBAN = 1,
	CS_T_TERROR = 2,
	CS_T_LEET = 3,
	CS_T_ARCTIC = 4,
	CS_CT_GSG9 = 5,
	CS_CT_GIGN = 6,
	CS_CT_SAS = 7,
	CS_T_GUERILLA = 8,
	CS_CT_VIP = 9,
	CZ_T_MILITIA = 10,
	CZ_CT_SPETSNAZ = 11,
};

/**
 * Counter-Strike team id constants.
 */
enum CsTeams
{
	CS_TEAM_UNASSIGNED = 0,
	CS_TEAM_T = 1,
	CS_TEAM_CT = 2,
	CS_TEAM_SPECTATOR = 3,
};

/**
 * @endsection
 */

/**
 * Counter-Strike armor types for use with cs_[get|set]_user_armor().
 */
enum CsArmorType
{
	CS_ARMOR_NONE = 0,      // no armor
	CS_ARMOR_KEVLAR = 1,    // body vest only
	CS_ARMOR_VESTHELM = 2,  // vest and helmet
};

/**
 * Map zone flags returned by cs_get_user_mapzones().
 */
#define CS_MAPZONE_BUY              (1<<0) // Buyzone
#define CS_MAPZONE_BOMBTARGET       (1<<1) // Bomb target zone
#define CS_MAPZONE_HOSTAGE_RESCUE   (1<<2) // Hostage rescue zone
#define CS_MAPZONE_ESCAPE           (1<<3) // Terrorist escape zone
#define CS_MAPZONE_VIP_SAFETY       (1<<4) // VIP escape zone

/**
 * Constants used for cs_[get|set]_user_zoom().
 */
enum
{
	CS_RESET_ZOOM = 0,      // Reset any zoom blocking (mode has no effect)
	CS_SET_NO_ZOOM,         // Disable any sort of zoom
	CS_SET_FIRST_ZOOM,      // Set first zoom level (AWP style)
	CS_SET_SECOND_ZOOM,     // Set second zoom level (AWP style)
	CS_SET_AUGSG552_ZOOM,   // Set AUG/SG552 zoom style
};

/**
 * Constants used for the CS_OnBuy() and CS_OnBuyAttempt() forwards.
 *
 * @note While these mostly overlap with the CSW_* constants the CSI_* constants
 *       contain custom AMXX values that do not correspond to any real value in
 *       the game. The CSI_* constants should therefore be used for consistency.
 */
#define CSI_P228                CSW_P228
#define CSI_SCOUT               CSW_SCOUT
#define CSI_HEGRENADE           CSW_HEGRENADE
#define CSI_XM1014              CSW_XM1014
#define CSI_C4                  CSW_C4
#define CSI_MAC10               CSW_MAC10
#define CSI_AUG                 CSW_AUG
#define CSI_SMOKEGRENADE        CSW_SMOKEGRENADE
#define CSI_ELITE               CSW_ELITE
#define CSI_FIVESEVEN           CSW_FIVESEVEN
#define CSI_UMP45               CSW_UMP45
#define CSI_SG550               CSW_SG550
#define CSI_GALIL               CSW_GALIL
#define CSI_FAMAS               CSW_FAMAS
#define CSI_USP                 CSW_USP
#define CSI_GLOCK18             CSW_GLOCK18
#define CSI_AWP                 CSW_AWP
#define CSI_MP5NAVY             CSW_MP5NAVY
#define CSI_M249                CSW_M249
#define CSI_M3                  CSW_M3
#define CSI_M4A1                CSW_M4A1
#define CSI_TMP                 CSW_TMP
#define CSI_G3SG1               CSW_G3SG1
#define CSI_FLASHBANG           CSW_FLASHBANG
#define CSI_DEAGLE              CSW_DEAGLE
#define CSI_SG552               CSW_SG552
#define CSI_AK47                CSW_AK47
#define CSI_P90                 CSW_P90
#define CSI_SHIELDGUN           CSW_SHIELDGUN
#define CSI_VEST                CSW_VEST        // Custom
#define CSI_VESTHELM            CSW_VESTHELM    // Custom
#define CSI_DEFUSER             33              // Custom
#define CSI_NVGS                34              // Custom
#define CSI_PRIAMMO             36              // Custom
#define CSI_SECAMMO             37              // Custom

/**
 * Returns client's deaths.
 *
 * @param index     Client index
 *
 * @return          Client deaths
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_deaths(index);

/**
 * Sets client's deaths.
 *
 * @param index         Client index
 * @param newdeaths     New value to set
 *
 * @noreturn
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_deaths(index, newdeaths);

/**
 * Returns index of the entity that a hostage is following.
 *
 * @note Hostages can theoretically follow any entity in the game, so the
 *       returned entity index is not necessarily a client index.
 * @note This native does not work on Condition Zero, which has a different
 *       hostage AI than other versions of Counter-Strike.
 *
 * @param index     Hostage entity index
 *
 * @return          Entity index if hostage is following something, 0 otherwise
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native cs_get_hostage_foll(index);

/**
 * Sets hostage to follow an entity.
 *
 * @note Hostages can theoretically follow any entity in the game, so the
 *       followedindex does not have to be a client index.
 * @note This native does not work on Condition Zero, which has a different
 *       hostage AI than other versions of Counter-Strike.
 *
 * @param index             Hostage entity index
 * @param followedindex     New entity to follow
 *
 * @noreturn
 * @error                   If the provided entity index is not a hostage, an
 *                          error will be thrown.
 */
native cs_set_hostage_foll(index, followedindex = 0);

/**
 * Returns unique id of a hostage.
 *
 * @param index     Hostage entity index
 *
 * @return          Unique hostage id
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native cs_get_hostage_id(index);

/**
 * Returns amount of ammo in the client's backpack for a specific weapon.
 *
 * @note For a list of possible weapon ids see the CSW_* constants in
 *       amxconst.inc
 * @note Some weapons share ammo types and therefore ammo backpack pools. List
 *       of ammo types:
 *       ammo_338magnum  - awp
 *       ammo_762nato    - scout, ak47, g3sg1
 *       ammo_556natobox - m249
 *       ammo_556nato    - famas, m4a1, aug, sg550, galil, sg552
 *       ammo_buckshot   - m3, xm1014
 *       ammo_45acp      - usp, ump45, mac10
 *       ammo_57mm       - fiveseven, p90
 *       ammo_50ae       - deagle
 *       ammo_357sig     - p228
 *       ammo_9mm        - glock, mp5, tmp, elites
 *       /               - hegrenade
 *       /               - flashbang
 *       /               - smokegrenade
 *
 * @param index     Client index
 * @param weapon    Weapon id
 *
 * @return          Amount of ammo in backpack
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, the client is not connected, or an invalid
 *                  weapon id is provided, an error will be thrown.
 */
native cs_get_user_bpammo(index, weapon);

/**
 * Sets amount of ammo in the client's backpack for a specific weapon.
 *
 * @note For a list of possible weapon ids see the CSW_* constants in
 *       amxconst.inc
 * @note Some weapons share ammo types and therefore ammo backpack pools. List
 *       of ammo types:
 *       ammo_338magnum  - awp
 *       ammo_762nato    - scout, ak47, g3sg1
 *       ammo_556natobox - m249
 *       ammo_556nato    - famas, m4a1, aug, sg550, galil, sg552
 *       ammo_buckshot   - m3, xm1014
 *       ammo_45acp      - usp, ump45, mac10
 *       ammo_57mm       - fiveseven, p90
 *       ammo_50ae       - deagle
 *       ammo_357sig     - p228
 *       ammo_9mm        - glock, mp5, tmp, elites
 *       /               - hegrenade
 *       /               - flashbang
 *       /               - smokegrenade
 *
 * @param index     Client index
 * @param weapon    Weapon id
 * @param amount    New backpack ammo amount to set
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, the client is not connected, or an invalid
 *                  weapon id is provided, an error will be thrown.
 */
native cs_set_user_bpammo(index, weapon, amount);

/**
 * Returns if the client has a defuse kit.
 *
 * @param index     Client index
 *
 * @return          1 if the client has a defuse kit, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, the client is not connected, or an invalid
 *                  weapon id is provided, an error will be thrown.
 */
native cs_get_user_defuse(index);

/**
 * Sets the client's defusekit status and allows to set a custom HUD icon and
 * color.
 *
 * @param index         Client index
 * @param defusekit     If nonzero the client will have a defusekit, otherwise
 *                      it will be removed
 * @param r             Red component of icon color
 * @param g             Green component of icon color
 * @param b             Blue component of icon color
 * @param icon          HUD sprite to use as icon
 * @param flash         If nonzero the icon will flash red
 *
 * @noreturn
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_defuse(index, defusekit = 1, r = 0, g = 160, b = 0, icon[] = "defuser", flash = 0);

/**
 * Returns if the client is inside a buyzone.
 *
 * @param index     Client index
 *
 * @return          1 if the client is inside a buyzone, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_buyzone(index);

/**
 * Returns if the client has a primary weapon or a shield in the inventory.
 *
 * @param index     Client index
 *
 * @return          1 if the client has a primary weapon or shield in the
 *                  inventory, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_hasprim(index);

/**
 * Retrieves the client's player model.
 *
 * @param index     Client index
 * @param model     Buffer to copy model to
 * @param len       Maximum buffer size
 *
 * @return          Number of cells written to buffer
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_model(index, model[], len);

/**
 * Sets the client's player model.
 *
 * @note This is not a one-time set. The CStrike module will remember the
 *       selected model and try to prevent attempts at changing the player
 *       model, or immediately re-apply it if necessary.
 *
 * @param index     Client index
 * @param model     Model name
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_set_user_model(index, const model[]);

/**
 * Resets the client's model.
 *
 * @note This lifts the model-lock set by a previous cs_set_user_model() call.
 *
 * @param index     Client index
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_reset_user_model(index);

/**
 * Returns the client's amount of money.
 *
 * @param index     Client index
 *
 * @return          Amount of money
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_money(index);

/**
 * Sets the client's amount of money.
 *
 * @param index     Client index
 * @param money     New amount to set
 * @param flash     If nonzero the HUD will flash the difference between new
 *                  and old amount in red or green
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_set_user_money(index, money, flash = 1);

/**
 * Returns if the client's has night vision goggles.
 *
 * @param index     Client index
 *
 * @return          1 if user has NVG, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_nvg(index);

/**
 * Sets the client's night vision goggles.
 *
 * @param index         Client index
 * @param nvgoogles     If nonzero the NVG will be added to the client's
 *                      inventory, otherwise they will be removed from it
 *
 * @noreturn
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_nvg(index, nvgoggles = 1);

/**
 * Returns if the client has the ability to plant the bomb.
 *
 * @note Only with this set can the client plant the bomb within the usual bomb
 *       target areas. If this is not set the user can not plant the bomb, even
 *       when he has one in the inventory.
 *
 * @param index     Client index
 *
 * @return          1 if the client is able to plant the bomb, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_plant(index);

/**
 * Sets the client's ability to plant the bomb and displays or hides the bomb
 * HUD icon.
 *
 * @note Only with this set can the client plant the bomb within the usual bomb
 *       target areas. If this is not set the user can not plant the bomb, even
 *       when he has one in the inventory. This is only correctly set when the
 *       client touches a bomb and picks it up "manually" (only possible for
 *       Terrorists), so this should be used if the bomb is added to the
 *       inventory through other means.
 *
 * @param index         Client index
 * @param plant         If nonzero the client will be able to plant the bomb,
 *                      otherwise he will be unable to
 * @param showbombicon  If nonzero the green C4 icon will be displayed on the
 *                      client's hud, otherwise it will be hidden
 *
 * @return              1 if the client is able to plant the bomb, 0 otherwise
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_plant(index, plant = 1, showbombicon = 1);

/**
 * Sets the client's team without killing the player, and sets the client model.
 *
 * @note For a list of valid team ids see the CsTeams enum, and for a list of
 *       valid internal model ids see the CsInternalModel enum.
 *
 * @param index     Client index
 * @param team      Team id
 * @param model     Internal model id, if CS_DONTCHANGE the game will choose the
 *                  model
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_set_user_team(index, any:team, any:model = CS_DONTCHANGE);

/**
 * Returns the client's team and optionally the model id.
 *
 * @note For a list of valid team ids see the CsTeams enum, and for a list of
 *       valid internal model ids see the CsInternalModel enum.
 *
 * @param index     Client index
 * @param model     Optional variable to store model id in
 *
 * @return          Team id
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native CsTeams:cs_get_user_team(index, &any:model = CS_DONTCHANGE);

/**
 * Returns if the client is a VIP.
 *
 * @param index     Client index
 *
 * @return          1 if the client is a VIP, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_vip(index);

/**
 * Sets the client's VIP status and displayed model and scoreboard flag.
 *
 * @note This is mostly useful for removing VIP status so the client can change
 *       teams and/or buy items properly. It does not alter gameplay, the player
 *       that is selected as VIP at the start of a round will retain the
 *       internal VIP status and remain the primary objective for the game mode.
 *
 * @param index         Client index
 * @param vip           If nonzero the client will be made a VIP, otherwise the
 *                      VIP status will be removed
 * @param model         If nonzero the client's model will be changed to the VIP
 *                      model, otherwise a random CT model will be selected
 * @param scoreboard    If nonzero the scoreboard will be updated to reflect the
 *                      new VIP status
 *
 * @noreturn
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_vip(index, vip = 1, model = 1, scoreboard = 1);

/**
 * Returns if the client has committed a team kill in the current round.
 *
 * @note If this is set to 1 the client will be punished at the start of the
 *       next round depending on the value of the mp_tkpunish cvar. The team
 *       kill status is then reset.
 *
 * @param index     Client index
 *
 * @return          1 if the client has committed a team kill, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_tked(index);

/**
 * Sets the client's team kill status, indicating whether the client has
 * committed a team kill in the current round.
 *
 * @note If this is set to 1 the client will be punished at the start of the
 *       next round depending on the value of the mp_tkpunish cvar. The team
 *       kill status is then reset.
 *
 * @param index     Client index
 * @param tk        Team kill status
 * @param subtract  Amount of frags to subtract, negative values add frags
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_set_user_tked(index, tk = 1, subtract = 1);

/**
 * Returns if the client is currently driving a vehicle and if so, indicates
 * the speed.
 *
 * @param index     Client index
 *
 * @return          0 if the client is not driving, 1 if driving a vehicle but
 *                  not moving, 2 to 4 if driving positive speeds, 5 if
 *                  driving at a negative speed (backing)
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_driving(index);

/**
 * Returns if the client has a shield in the inventory.
 *
 * @param index     Client index
 *
 * @return          1 if the client has a shield, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_shield(index);

/**
 * Returns if the client is using a stationary gun.
 *
 * @param index     Client index
 *
 * @return          1 if the client uses a stationary gun, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_stationary(index);

/**
 * Returns the client's armor value and retrieves the type of armor.
 *
 * @note For a list of possible armor types see the CsArmorType enum.
 *
 * @param index         Client index
 * @param armortype     Variable to store armor type in
 *
 * @return              Amount of armor, 0 if client has no armor
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_get_user_armor(index, &CsArmorType:armortype);

/**
 * Sets the client's armor value the type of armor.
 *
 * @note For a list of possible armor types see the CsArmorType enum.
 * @note Sends the appropriate message to update the client's HUD.
 *
 * @param index         Client index
 * @param armorvalue    Amount of armor to set
 * @param armortype     CS armor type
 *
 * @noreturn
 * @error               If the client index is not within the range of 1 to
 *                      MaxClients, or the client is not connected, an error
 *                      will be thrown.
 */
native cs_set_user_armor(index, armorvalue, CsArmorType:armortype);

/**
 * Returns if the weapon is in burst mode.
 *
 * @note Only the Glock and Famas can return 1 as they are the only guns in the
 *       game that have a burst fire mode.
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will return incorrect values for non-weapon entities.
 *
 * @param index     Weapon entity index
 *
 * @return          1 if the weapon is in burst mode, 0 otherwise
 * @error           If an invalid entity index or a client index is provided,
 *                  an error will be thrown.
 */
native cs_get_weapon_burst(index);

/**
 * Sets the weapon's burst mode.
 *
 * @note Only the Glock and Famas can be set to burst fire mode as they are the
 *       only guns in the game that provide such a mode.
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will result in undefined behavior if used on non-weapon
 *       entities.
 *
 * @param index         Weapon entity index
 * @param burstmode     If nonzero the weapon will be put into burstmode,
 *                      otherwise the burst mode will be removed
 *
 * @return              1 if burst mode set successfully, 0 if entity is not
 *                      an applicable weapon
 * @error               If an invalid entity index or a client index is
 *                      provided, an error will be thrown.
 */
native cs_set_weapon_burst(index, burstmode = 1);

/**
 * Returns if the weapon is in silenced mode.
 *
 * @note Only the USP and M4A1 can return 1 as they are the only guns in the
 *       game that have a silenced fire mode.
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will return incorrect values for non-weapon entities.
 *
 * @param index     Weapon entity index
 *
 * @return          1 if the weapon is in silenced mode, 0 otherwise
 * @error           If an invalid entity index or a client index is provided,
 *                  an error will be thrown.
 */
native cs_get_weapon_silen(index);

/**
 * Sets the weapon's silenced mode.
 *
 * @note Only the USP and M4A1 can be set to silenced fire mode as they are the
 *       only guns in the game that provide such a mode.
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will result in undefined behavior if used on non-weapon
 *       entities.
 *
 * @param index             Weapon entity index
 * @param silence           If nonzero the weapon will be put into silenced
 *                          mode, otherwise the silenced mode will be removed
 * @param draw_animation    If nonzero and the weapon is currently held by a
 *                          client, the appropriate weapon animation will be
 *                          played
 *
 * @return                  1 if silenced mode set successfully, 0 if entity is
 *                          not an applicable weapon
 * @error                   If an invalid entity index or a client index is
 *                          provided, an error will be thrown.
 */
native cs_set_weapon_silen(index, silence = 1, draw_animation = 1);

/**
 * Returns the amount of ammo in weapon's magazine.
 *
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will return incorrect values for non-weapon entities.
 *
 * @param index     Weapon entity index
 *
 * @return          Amount of ammo in magazine
 * @error           If an invalid entity index or a client index is provided,
 *                  an error will be thrown.
 */
native cs_get_weapon_ammo(index);

/**
 * Sets the amount of ammo in weapon's clip.
 *
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will result in undefined behavior if used on non-weapon
 *       entities.
 *
 * @param index     Weapon entity index
 * @param newammo   New ammo amount
 *
 * @noreturn
 * @error           If an invalid entity index or a client index is provided,
 *                  an error will be thrown.
 */
native cs_set_weapon_ammo(index, newammo);

/**
 * Returns the weapon id of an entity.
 *
 * @note For a list of possible weapon ids see the CSW_* constants in
 *       amxconst.inc
 * @note This native does not verify that the provided entity is a weapon
 *       entity. It will return incorrect values for non-weapon entities.
 *
 * @param index     Weapon entity index
 *
 * @return          Weapon id
 * @error           If an invalid entity index or a client index is provided,
 *                  an error will be thrown.
 */
native cs_get_weapon_id(index);

/**
 * Returns if "no knives" mode is enabled.
 *
 * @note "No knives" mode means that the CStrike module will prevent the game
 *       from creating (and thus attaching) "weapon_knife" entities. This means
 *       that clients will spawn without knives, but knives can still be put
 *       into the client inventories directly.
 *
 * @return  1 if "no knives" mode is enabled, 0 otherwise
 */
native cs_get_no_knives();

/**
 * Enables or disables the "no knives" mode.
 *
 * @note "No knives" mode means that the CStrike module will prevent the game
 *       from creating (and thus attaching) "weapon_knife" entities. This means
 *       that clients will spawn without knives, but knives can still be put
 *       into the client inventories directly.
 *
 * @param noknives  If nonzero enable "no knives" mode, disable otherwise
 *
 * @noreturn
 */
native cs_set_no_knives(noknives = 0);

/**
 * Sets a dead client up for spawning.
 *
 * @note This sets the client deadflag and triggers a client think, effectively
 *       making the game respawn the client. Should only be used on dead
 *       clients.
 *
 * @param player    Client index
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_user_spawn(player);

/**
 * Returns the armoury entity's weapon id.
 *
 * @note Not all weapon ids are supported by Counter-Strike, an armoury entity
 *       can not be a pistol, a knife or a bomb for exmaple. The full list is:
 *          CSW_SCOUT, CSW_HEGRENADE, CSW_XM1014, CSW_MAC10, CSW_AUG,
 *          CSW_SMOKEGRENADE, CSW_AWP, CSW_MP5NAVY, CSW_M249, CSW_M3, CSW_M4A1,
 *          CSW_TMP, CSW_G3SG1, CSW_VEST, CSW_VESTHELM, CSW_FLASHBANG,
 *          CSW_SG552, CSW_AK47, CSW_P90
 *
 * @param index     Armoury entity index
 *
 * @return          Weapon id
 * @error           If a non-armoury entity is provided, an error will be
 *                  thrown.
 */
native cs_get_armoury_type(index);

/**
 * Sets the amoury entity type.
 *
 * @note Not all weapon ids are supported by Counter-Strike, an armoury entity
 *       can not be a pistol, a knife or a bomb for exmaple. The full list is:
 *          CSW_SCOUT, CSW_HEGRENADE, CSW_XM1014, CSW_MAC10, CSW_AUG,
 *          CSW_SMOKEGRENADE, CSW_AWP, CSW_MP5NAVY, CSW_M249, CSW_M3, CSW_M4A1,
 *          CSW_TMP, CSW_G3SG1, CSW_VEST, CSW_VESTHELM, CSW_FLASHBANG,
 *          CSW_SG552, CSW_AK47, CSW_P90
 * @note This does not update the entity model.
 *
 * @param index     Armoury entity index
 * @param type      Weapon id
 *
 * @noreturn
 * @error           If a non-armoury entity is provided, an error will be
 *                  thrown.
 */
native cs_set_armoury_type(index, type);

/**
 * Returns the map zones the client is inside of as a bitflag value.
 *
 * @note If the user does not have the ability to plant (cs_get_user_plant()
 *       returns 0) then the bitflag will not contain CS_MAPZONE_BOMBTARGET.
 * @nore For a list of possible zone flags see the CS_MAPZONE_* constants.
 *
 * @param index     Client index
 *
 * @return          Bitflag value of map zones
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_mapzones(index);

/**
 * Sets a zoom type on the client.
 *
 * @note Zoom types are not tied to their intended weapons, so any zoom type can
 *       be combined with any weapon.
 * @note For a list of possible zoom types see the zoom type enum above
 *       (CS_*_ZOOM constants).
 *
 * @param index     Client index
 * @param type      Zoom type
 * @param mode      If zero (blocking) the client will be forced to use the zoom
 *                  type set and won't be able to change it until it is reset
 *                  with CS_RESET_ZOOM, otherwise the user can restore back to
 *                  normal as usual
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, the client is not connected, or an invalid zoom
 *                  type is provided, an error will be thrown.
 */
native cs_set_user_zoom(index, type, mode);

/**
 * Returns if the client is zooming.
 *
 * @note For a list of possible zoom types see the zoom type enum above
 *       (CS_*_ZOOM constants).
 *
 * @param index     Client index
 *
 * @return          Zoom type if the user is zoomed in, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_zoom(index);

/**
 * Returns if a submodel is set on the client.
 *
 * @note In Counter-Strike the submodel setting determines whether the user has
 *       a bomb backpack (if a Terrorist) or a defuse kit (if a CT) on their
 *       model.
 *
 * @param index     Client index
 *
 * @return          1 if submodel is set, 0 otherwise
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 *                  thrown.
 */
native cs_get_user_submodel(index);

/**
 * Sets the submodel on a client.
 *
 * @note In Counter-Strike the submodel setting determines whether the user has
 *       a bomb backpack (if a Terrorist) or a defuse kit (if a CT) on their
 *       model.
 *
 * @param index     Client index
 * @param value     If nonzero the submodel is set, otherwise it is removed
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 */
native cs_set_user_submodel(index, value);

/**
 * Returns the client's last activity time.
 *
 * @note This is the time that the internal Counter-Strike afk kicker uses to
 *       see who has been inactive too long.
 *
 * @param index     Client index
 *
 * @return          Last activity time
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 */
native Float:cs_get_user_lastactivity(index);

/**
 * Sets the client's last activity time.
 *
 * @note This is the time that the internal Counter-Strike afk kicker uses to
 *       see who has been inactive too long.
 *
 * @param index     Client index
 * @param value     New last activity time
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 */
native cs_set_user_lastactivity(index, Float:value);

/**
 * Returns the amount of hostages that the client has killed.
 *
 * @note This is the value that the internal Counter-Strike hostage punisher
 *       uses to determine if a client should be kicked, depending on the
 *       value of the mp_hostagepenalty value.
 *
 * @param index     Client index
 *
 * @return          Amount of hostages killed
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 */
native cs_get_user_hostagekills(index);

/**
 * Sets the amount of hostages that the client has killed.
 *
 * @note This is the value that the internal Counter-Strike hostage punisher
 *       uses to determine if a client should be kicked, depending on the
 *       value of the mp_hostagepenalty value. The punisher only checks this
 *       value when a hostage is killed, so setting this will not cause the
 *       client to be kicked until they actually kill a hostage.
 *
 * @param index     Client index
 * @param value     New amount of hostages killed
 *
 * @noreturn
 * @error           If the client index is not within the range of 1 to
 *                  MaxClients, or the client is not connected, an error will be
 */
native cs_set_user_hostagekills(index, value);

/**
 * Returns the last time a hostage was used.
 *
 * @param index     Hostage entity
 *
 * @return          Last use time
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native Float:cs_get_hostage_lastuse(index);

/**
 * Sets the last time a hostage was used.
 *
 * @param index     Hostage entity
 * @param value     New last use time
 *
 * @noreturn
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native cs_set_hostage_lastuse(index, Float:value);

/**
 * Returns the next time a hostage can be used.
 *
 * @param index     Hostage entity
 *
 * @return          Next use time
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native Float:cs_get_hostage_nextuse(index);

/**
 * Sets the next time a hostage can be used.
 *
 * @param index     Hostage entity
 * @param value     New next use time
 *
 * @noreturn
 * @error           If the provided entity index is not a hostage, an error will
 *                  be thrown.
 */
native cs_set_hostage_nextuse(index, Float:value);

/**
 * Returns the time the bomb will explode.
 *
 * @param index     C4 entity
 *
 * @return          Explosion time
 * @error           If the provided entity index is not a bomb, an error will be
 *                  thrown.
 */
native Float:cs_get_c4_explode_time(index);

/**
 * Sets the time the bomb will explode.
 *
 * @param index     C4 entity
 * @param value     New explosion time
 *
 * @noreturn
 * @error           If the provided entity index is not a bomb, an error will be
 *                  thrown.
 */
native cs_set_c4_explode_time(index, Float:value);

/**
 * Returns if the bomb is being defused.
 *
 * @param c4index   C4 entity
 *
 * @return          1 if the bomb is being defused, 0 otherwise
 * @error           If the provided entity index is not a bomb, an error will be
 *                  thrown.
 */
native bool:cs_get_c4_defusing(c4index);

/**
 * Sets if the bomb is being defused.
 *
 * @param c4index   C4 entity
 * @param defusing  True if the bomb should be defused, false otherwise
 *
 * @noreturn
 * @error           If the provided entity index is not a bomb, an error will be
 *                  thrown.
 */
native cs_set_c4_defusing(c4index, bool:defusing);

/**
 * Creates an entity using Counter-Strike's custom CreateNamedEntity wrapper.
 *
 * @note Unlike other mods CS keeps track of entities using a custom hashtable.
 *       This function adds entities to this hashtable, providing benefits over
 *       the default CreateNamedEntity (used by create_entity() for example):
 *       - Storing entities in a hashtable allows CS to improve classname lookup
 *         performance compared to functions like FindEntityByString (used by
 *         find_ent_by_class() for example) that usually have to loop
 *         through all entities incrementally.
 *       - As CS exclusively uses the hashtable for classname lookup, entities
 *         created using the default engine functions will not be found by the
 *         game. For example "weaponbox" entities are supposed to be
 *         automatically cleaned up on round restart but are not considered if
 *         they have not been added to the hashtable.
 * @note The faster hashtable lookup can be utilized with cs_find_ent_by_class()
 * @note When creating an entity the classname has to be valid in the mod, as
 *       the engine needs to link the entity to an existing class internally.
 *       The classname string that is stored in the entvar struct
 *       (EV_SZ_classname) is separate from this association and can later be
 *       freely changed to serve other purposes.
 *
 * @param classname     Entity class name
 *
 * @return              Index of the created entity (> 0), 0 otherwise
 */
native cs_create_entity(const classname[]);

/**
 * Finds an entity in the world using Counter-Strike's custom FindEntityByString
 * wrapper.
 *
 * @note Unlike other mods CS keeps track of entities using a custom hashtable.
 *       This function utilizes the hasthable and allows for considerably faster
 *       classname lookup compared to the default FindEntityByString (used by
 *       find_ent_by_class() for example).
 * @note This exclusively considers entities in the hashtable, created by the
 *       game itself or using cs_create_entity().
 *
 * @param start_index   Entity index to start searching from. -1 to start from
 *                      the first entity
 * @param classname     Classname to search for
 *
 * @return              Entity index > 0 if found, 0 otherwise
 */
native cs_find_ent_by_class(start_index, const classname[]);

/**
 * Called when CS internally fires a command to a player.
 *
 * @note This is most notably used by the rebuy/autobuy functionality,
 *       Condition Zero also uses this to pass commands to bots internally.
 *
 * @param id    Client index
 * @param cmd   Command string
 *
 * @return      PLUGIN_CONTINUE to let the command continue
 *              PLUGIN_HANDLED to block the command
 */
forward CS_InternalCommand(id, const cmd[]);

/**
 * Called when a client attempts to purchase an item.
 *
 * @note This is called immediately when the client issues a buy command. The
 *       game has not yet checked if the client can actually buy the weapon.
 * @note For a list of possible item ids see the CSI_* constants.
 *
 * @param index     Client index
 * @param item      Item id
 *
 * @return          PLUGIN_CONTINUE to let the buy attempt continue
 *                  PLUGIN_HANDLED to block the buy attempt
 */
forward CS_OnBuyAttempt(index, item);

/**
 * Called when a client purchases an item.
 *
 * @note This is called right before the user receives the item and before the
 *       money is deducted from their cash reserves.
 * @note For a list of possible item ids see the CSI_* constants.
 *
 * @param index     Client index
 * @param item      Item id
 *
 * @return          PLUGIN_CONTINUE to let the buy continue
 *                  PLUGIN_HANDLED to block the buy
 */
forward CS_OnBuy(index, item);