【数据存储】道具流水：装备强化全程的流水追踪

function logFlow(actor, item, lv, cost, ok)
    local day = os.date("%Y%m%d")
    local line = os.time() .. "|" .. item .. "|" .. lv .. "|" .. cost .. "|" .. (ok and 1 or 0)
    local old = getplayvar(actor, "HUMAN", "FLOW_" .. day) or ""
    if old ~= "" then
        line = old .. ";" .. line
    end
    setplayvar(actor, "HUMAN", "FLOW_" .. day, line, 1)
end

function dayStat(actor, day)
    local raw = (getplayvar(actor, "HUMAN", "FLOW_" .. day) or "") .. ";"
    local cnt, cost = 0, 0
    for row in string.gmatch(raw, "([^;]*);") do
        local t, it, l, c, ok = row:match("(%d+)|([^|]*)|(%d+)|(%d+)|(%d+)")
        if t ~= nil then
            cnt = cnt + 1
            cost = cost + tonumber(c)
        end
    end
    return cnt, cost
end