【数据存储】属性快照表：每日战力与属性的存档

setontimerex(225, 300)
function ontimer225()
    local hm = os.date("%H%M")
    if hm ~= "2350" then return end
    local day = os.date("%Y%m%d")
    local snapshot = {}
    for _, actor in ipairs(getOnlinePlayers()) do
        local p = class(actor)
        local nm = p:GetName()
        snapshot[nm] = p.lv .. "," .. p.atk .. "," .. p.def .. "," .. p.hp
    end
    setsysvarex("SNAP_" .. day, serialize(snapshot), 1)
end

local function diffSnapshot(dayA, dayB)
    local snapA = deserialize(getsysvar("SNAP_" .. dayA) or "{}")
    local snapB = deserialize(getsysvar("SNAP_" .. dayB) or "{}")
    local diff = {}
    for nm, attrs in pairs(snapA) do
        if snapB[nm] and snapB[nm] ~= attrs then
            table.insert(diff, { name = nm, old = attrs, new = snapB[nm] })
        end
    end
    return diff
end