Grimrock

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-- 
-- Count how many of a single type of item the player has in their inventory.
--
function countInventoryItem(name)
	if name == nil then return 0 end
	local count = 0
	
	for idx=1,4 do
		local champion = party.party:getChampion(idx)
		
		for slot=1,ItemSlot.MaxSlots do
			local item = champion:getItem(slot)
			
			if (item and (item.go.name == name)) then 
				count = count + item:getStackSize()
			end
		end
	end

	return count
end


--
-- Remove "count" of object "name" from the player's inventory.
--
function removeInventoryItem(name, count)
	if name == nil then return false end
	if count == nil then count = 0 end
	
	local remaining = count

	if countInventoryItem(name) < count then
		return false
	end
	
	for idx=1,4 do
		local champion = party.party:getChampion(idx)
		
		for slot=1,ItemSlot.MaxSlots do
			local item = champion:getItem(slot)
			
			if (item and (item.go.name == name)) then 
				if item:getStackSize() <= remaining then
					remaining = remaining - item:getStackSize()		
					champion:removeItemFromSlot(slot);		
				else
					item:setStackSize(item:getStackSize() - remaining)
					remaining = 0
				end
			end
			
			if remaining <= 0 then
				return true
			end
		end
	end
	
	print("ERROR: Should never get here - items lost but function failed!")
	return false
end