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Jul 17th, 2021

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local cache = {}
local chest = peripheral.find(...)
-- Update the cache
local function UpdateCache(chest)
local funcs = {}
local list = chest.list()
-- Populate functions list
for i = 1, chest.size() do
if not list[i] then break end
funcs[i] = function() -- for each slot, store nbtHash and label to cache
cache[i] = {
nbtHash = list[i].nbtHash,
label = chest.getItemMeta(i).media.label -- note that this will throw an error if you insert a non-cassete to chest
}
end
end
cache = {} -- clear the cache then update it
parallel.waitForAll(table.unpack(funcs))
end
-- Check if the contents of chest are different than cached
local function CheckDiff(chest)
local list = chest.list()
for i = 1, chest.size() do -- if slot[i] is not equal to cache[i] then
if list[i] and not cache[i] or cache[i] and not list[i] then return true end
if cache[i].nbtHash ~= list[i].nbtHash then
return true
end
end
return false
end
-- main loop, check for differences, update if so.
while true do
if CheckDiff(chest) then
UpdateCache()
end
os.sleep(1)
end

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