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-- wipe_daemon.lua
local keepFile = "wipe_daemon.lua"   -- The file that survives
local intervalDays = 10              -- Days between wipes
local timeFile = ".last_wipe_time"   -- Hidden file to track last wipe
local checkIntervalMinutes = 30      -- How often to check (in minutes)

-- Current UTC time in ms
local function currentTime()
    return os.epoch("utc")
end

-- Should we wipe?
local function shouldWipe()
    if not fs.exists(timeFile) then
        return true
    end
    local file = fs.open(timeFile, "r")
    local lastTime = tonumber(file.readAll())
    file.close()
    local elapsed = (currentTime() - lastTime) / (1000 * 60 * 60 * 24)
    return elapsed >= intervalDays
end

-- Record last wipe time
local function recordWipeTime()
    local file = fs.open(timeFile, "w")
    file.write(tostring(currentTime()))
    file.close()
end

-- Wipe all files except the keeper and the time file
local function wipeFiles()
    for _, name in ipairs(fs.list("/")) do
        if name ~= keepFile and name ~= timeFile then
            fs.delete(name)
        end
    end
    recordWipeTime()
end

-- Main loop
while true do
    if shouldWipe() then
        wipeFiles()
    end
    sleep(checkIntervalMinutes * 60) -- Wait before checking again
end