Accessory - Add conditional blocking of switchable attachments

addons/accessory/CfgFunctions.hpp

@@ -1,6 +1,7 @@
 class CfgFunctions {
     class CBA {
         class Inventory {
+            PATHTO_FNC(addAttachmentCondition);
             PATHTO_FNC(switchableAttachments);
         };
     };

addons/accessory/XEH_preInit.sqf

@@ -4,6 +4,8 @@ if (!hasInterface) exitWith {};
 
 #include "XEH_PREP.sqf"
 
+GVAR(usageHash) = createHashMap;
+
 [ELSTRING(common,WeaponsCategory), "MRT_SwitchItemNextClass_R", [LSTRING(railNext), LSTRING(railNext_tooltip)], {
     [1, "next"] call FUNC(switchAttachment) // return
 }, {}, [DIK_L, [false, true, false]]] call CBA_fnc_addKeybind;

addons/accessory/fnc_addAttachmentCondition.sqf

@@ -0,0 +1,29 @@
+#include "script_component.hpp"
+/* ----------------------------------------------------------------------------
+Function: CBA_fnc_addAttachmentCondition
+
+Description:
+    Adds condition to be able to switch to an attachment.
+
+Parameters:
+    0: _item - Attachment classname <STRING>
+    1: _condition - Code (return false if not allowed) <CODE>
+
+Returns:
+    None
+
+Examples:
+    (begin example)
+        ["ACE_acc_pointer_red", { false }] call CBA_fnc_addAttachmentCondition
+    (end)
+
+Author:
+    PabstMirror
+---------------------------------------------------------------------------- */
+
+params [["_item", "", [""]], ["_condition", {true}, [{}]]];
+
+if (!isClass (configfile >> "CfgWeapons" >> _item)) exitWith { ERROR_1("Item not found [%1]", _item); };
+
+private _usageArray = GVAR(usageHash) getOrDefault [_item, [], true];
+_usageArray pushBack _condition;

addons/accessory/fnc_switchAttachment.sqf

@@ -41,17 +41,28 @@ private _currWeaponType = call {
 };
 if (_currWeaponType < 0) exitWith {false};
 
-#define __cfgWeapons configfile >> "CfgWeapons"
-#define __currItem __cfgWeapons >> _currItem
+private _cfgWeapons = configfile >> "CfgWeapons";
 
-// Get the next/previous item from the attachement's config, but ignore inherited values
-private _configs = if (_switchTo == "next") then {
-    configProperties [__currItem, "configName _x == 'MRT_SwitchItemNextClass'", false];
-} else {
-    configProperties [__currItem, "configName _x == 'MRT_SwitchItemPrevClass'", false];
-};
-if (_configs isNotEqualTo []) then {
-    _switchItem = getText (_configs select 0);
+private _testItem = _currItem;
+while {_testItem != ""} do {
+    // Get the next/previous item from the attachment's config, but ignore inherited values
+    private _configs = if (_switchTo == "next") then {
+        configProperties [_cfgWeapons >> _testItem, "configName _x == 'MRT_SwitchItemNextClass'", false];
+    } else {
+        configProperties [_cfgWeapons >> _testItem, "configName _x == 'MRT_SwitchItemPrevClass'", false];
+    };
+
+    if (_configs isEqualTo []) then {
+        _testItem = "";
+    } else {
+        _testItem = getText (_configs select 0);
+        if (_testItem == "") exitWith {};
+        if (_testItem == _currItem) exitWith { _testItem = ""; }; // same as start (full loop)
+        private _usageArray = GVAR(usageHash) getOrDefault [_testItem, []];
+        if ((_usageArray findIf {([_testItem] call _x) isEqualTo false}) == -1) then { // none returned false
+            _switchItem = _testItem;
+        };
+    };
 };
 TRACE_3("",_currItem,_switchTo,_switchItem);
 
@@ -82,8 +93,9 @@ if (!isNil "_switchItem") then {
             }, [_unit, _currItem, _switchItem, _currWeaponType]] call CBA_fnc_execNextFrame;
         };
     };
-    private _switchItemHintText = getText (__cfgWeapons >> _switchItem >> "MRT_SwitchItemHintText");
-    private _switchItemHintImage = getText (__cfgWeapons >> _switchItem >> "picture");
+    private _configSwitchItem = _cfgWeapons >> _switchItem;
+    private _switchItemHintText = getText (_configSwitchItem >> "MRT_SwitchItemHintText");
+    private _switchItemHintImage = getText (_configSwitchItem >> "picture");
     if (_switchItemHintText isNotEqualTo "") then {
         [[_switchItemHintImage, 2.0], [_switchItemHintText], true] call CBA_fnc_notify;
     };

addons/accessory/fnc_switchableAttachments.sqf

@@ -39,4 +39,10 @@ while {
 } do {};
 
 _forward = _forward + _backward;
-_forward arrayIntersect _forward // return
+_forward = _forward arrayIntersect _forward;
+_forward select {
+    private _item = _x;
+    private _usageArray = GVAR(usageHash) getOrDefault [_x, []];
+    (_usageArray findIf {([_item] call _x) isEqualTo false}) == -1 // none returned false
+} // return
+