【网络通信】回归召唤推送：离线补偿的增量下发与领取回执

function onLoginBack(actor)
    local player = class(actor)
    local leaveTs = tonumber(getplayvar(actor, 2, "LOGOUT_TS") or "0")
    local days = math.floor((os.time() - leaveTs) / 86400)
    if days < 7 then return end
    local summary = "回归礼包|战况简报|" .. days .. "天"
    sendluamsg(actor, 7901, days, 0, 0, summary)
    setplayvar(actor, "HUMAN", "BACK_DAYS", days, 1)
end

function claimBackReward(actor, itemIdx)
    local player = class(actor)
    local key = "BACK_GOT_" .. itemIdx
    if getplayvar(actor, 2, key) == 1 then
        sendmsg(actor, 0, "该奖励已领取")
        return
    end
    setplayvar(actor, "HUMAN", key, 1, 1)
    sendmail(actor, 0, "回归专属礼包", "欢迎回到玛法大陆", "回归礼包|1")
end