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Fix handling of empty stacks and item accumulation

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Fixes SmallJoker/bitchange#9
This commit is contained in:
Foz 2017-02-17 00:02:36 -05:00 committed by SmallJoker
parent 6f9cc0081a
commit 3814d994db
1 changed files with 38 additions and 11 deletions
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49
shop.lua
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@ -7,25 +7,52 @@ local exchange_shop = {}
-- Tool wear aware replacement for contains_item.
local function list_contains_item(inv, listname, stack)
local count = stack:get_count()
if count == 0 then
return true
end
local list = inv:get_list(listname)
for i, list_stack in pairs(list) do
if list_stack:get_name() == stack:get_name() and
list_stack:get_count() >= stack:get_count() and
list_stack:get_wear() <= stack:get_wear() then
return i
local name = stack:get_name()
local wear = stack:get_wear()
for _, list_stack in pairs(list) do
if list_stack:get_name() == name and
list_stack:get_wear() <= wear then
if list_stack:get_count() >= count then
return true
else
count = count - list_stack:get_count()
end
end
end
end
-- Tool wear aware replacement for remove_item.
local function list_remove_item(inv, listname, stack)
local index = list_contains_item(inv, listname, stack)
if index then
local list_stack = inv:get_stack(listname, index)
local removed_stack = list_stack:take_item(stack:get_count())
inv:set_stack(listname, index, list_stack)
return removed_stack
local count = stack:get_count()
if count == 0 then
return stack
end
local removed_stack = ItemStack(nil)
local list = inv:get_list(listname)
local name = stack:get_name()
local wear = stack:get_wear()
for index, list_stack in pairs(list) do
if list_stack:get_name() == name and
list_stack:get_wear() <= wear then
if list_stack:get_count() >= count then
removed_stack:add_item(list_stack:take_item(count))
inv:set_stack(listname, index, list_stack)
break
else
removed_stack:add_item(list_stack)
inv:set_stack(listname, index, ItemStack(nil))
count = count - list_stack:get_count()
end
end
end
return removed_stack
end
local function get_exchange_shop_formspec(number,pos,title)