【后端接口】离线结算书：挂机收益的离线结算接口设计

local RATE = 4000
local CAP_HOURS = 8
function offlineSettle(actor)
    local player = class(actor)
    local leaveTs = tonumber(getplayvar(actor, 2, "LOGOUT_TS") or "0")
    local hours = math.min(CAP_HOURS, math.floor((os.time() - leaveTs) / 3600))
    if hours <= 0 then return end
    local gain = hours * RATE
    setplayvar(actor, "HUMAN", "OFFLINE_GAIN", gain, 1)
    giveitem(actor, "离线结算书", 1)
    sendmsg(actor, 0, "离线" .. hours .. "小时，结算书已放入背包")
end

local function redeemBook(actor)
    local player = class(actor)
    local gain = tonumber(getplayvar(actor, 2, "OFFLINE_GAIN") or "0")
    if gain <= 0 then
        sendmsg(actor, 0, "没有待领取的离线收益")
        return
    end
    addbuff(actor, "EXP_GRANT", 5)
    setplayvar(actor, "HUMAN", "OFFLINE_GAIN", 0, 1)
    sendmsg(actor, 0, "离线收益" .. gain .. "经验已发放")
end