Implement "as though using ..." weapon type check

"Hollow Palm" introduces the "as though using a Quarterstaff" wording.
Current interpretation is that this is different from "count as using"
wording and only removes weapon type restrictions. This commit adds
support for that kind of behavior.

Note:
Because "WeaponData" mods are only processed in `Item.lua` and only for
actual items. This kind of mod will not work via `ModParser` when
modifying "Unarmed" weaponData

Author: majochem

src/Modules/CalcActiveSkill.lua

@@ -197,6 +197,24 @@ function calcs.copyActiveSkill(env, mode, skill)
 	return newSkill, newEnv
 end
 
+-- Check for "asThoughUsing..." weaponTypes match, which is mechanically different from "countAs..."
+---@param weaponData table
+---@param weaponTypes table
+---@return boolean @whether a match was found
+local function checkAsThoughWeaponTypes(weaponData, weaponTypes)
+	if (not weaponData.asThoughUsing) or (not weaponTypes) then
+		return false
+	else
+		-- check if any 'usingKey' for which 'usingValue = true' is also true in weaponTypes
+		for usingKey, usingValue in pairs(weaponData.asThoughUsing) do
+			for _, types in ipairs(weaponTypes) do
+				if usingValue and types[usingKey] then return true end
+			end
+		end
+	end
+	return false
+end
+
 -- Get weapon flags and info for given weapon
 local function getWeaponFlags(env, weaponData, weaponTypes)
 	local info = env.data.weaponTypeInfo[weaponData.type]
@@ -207,7 +225,7 @@ local function getWeaponFlags(env, weaponData, weaponTypes)
 		for _, types in ipairs(weaponTypes) do
 			if not types[weaponData.type] and
 			(not weaponData.countsAsAll1H or not (types["Claw"] or types["Dagger"] or types["One Handed Axe"] or types["One Handed Mace"] or types["One Handed Sword"]
-			or types["Spear"])) then
+			or types["Spear"])) and not (weaponData.asThoughUsing and checkAsThoughWeaponTypes(weaponData, weaponTypes)) then
 				return nil, info
 			end
 		end