挂机收益：离线挂机与在线挂机的差异

local OFFLINE_CAP = 8 * 3600
local RATE = 0.6
local function settleOffline(p)
    local last = tonumber(getplayvar(p, "lastSeen") or "0")
    if last <= 0 then return end
    local gap = os.time() - last
    if gap < 60 then return end
    if gap > OFFLINE_CAP then gap = OFFLINE_CAP end
    local mins = math.floor(gap / 60)
    local exp = mins * 18
    local gold = mins * 3
    setplayvar(p, "EXP", (getplayvar(p, "EXP") or 0) + exp)
    setplayvar(p, "GOLD", (getplayvar(p, "GOLD") or 0) + gold)
    sendmsg(p, 1, "离线收益补发：经验 " .. exp .. " 金币 " .. gold)
end

local function onlineTick(p)
    setplayvar(p, "EXP", (getplayvar(p, "EXP") or 0) + 30)
    setplayvar(p, "GOLD", (getplayvar(p, "GOLD") or 0) + 5)
end