【数据存储】变量水位：角色变量体积的监控与治理

-- 变量水位：系统占比统计
local player = class(actor)
local PREFIXES = {"Mail", "Vault", "Gear", "Title", "HB_"}
local function waterReport(player)
    local blob = getplayvar(player, "HUMAN", "__ALL__") or ""
    local report = {}
    for _, p in ipairs(PREFIXES) do
        local cnt = 0
        for k in string.gmatch(blob, p .. "%w*") do
            cnt = cnt + #k
        end
        report[#report + 1] = p .. "=" .. cnt
    end
    sendmsg(player, 1, 0, "变量水位：" .. table.concat(report, " "))
end

-- 水位治理：环形化示例
local player = class(actor)
local function ringify(player, key, keepN)
    local blob = getplayvar(player, "HUMAN", key) or ""
    local parts = {}
    for item in string.gmatch(blob, "[^&]+") do
        parts[#parts + 1] = item
    end
    while #parts > keepN do
        table.remove(parts, 1)
    end
    setplayvar(player, "HUMAN", key, table.concat(parts, "&"), true)
    sendmsg(player, 1, 0, key .. " 已环形化，保留最近 " .. keepN .. " 条。")
end