【数据存储】行会变量快照：攻城前的存档备份与恢复脚本

local function snapshotGuild(gname)
    local keys = { "OWNER", "BUILD", "WARWIN" }
    local buf = ""
    for _, k in ipairs(keys) do
        buf = buf .. k .. "=" .. tostring(setsysvar and getsysvar(gname .. "_" .. k) or "") .. ";"
    end
    local tag = "SNAP_" .. os.date("%m%d") .. "_" .. gname
    setsysvarex(tag, buf, 1)
    return tag
end

local function restoreGuild(gname, tag)
    local buf = getsysvar(tag) or ""
    for pair in string.gmatch(buf, "[^;]+") do
        local k, v = string.match(pair, "(%w+)=(.*)")
        if k then setsysvarex(gname .. "_" .. k, v, 1) end
    end
    sendcentermsg("行会数据已按快照恢复：" .. gname)
end