【进阶实战】驻地排期：行会建筑升级的排期冲突检测

local function scheduleUpgrade(actor, buildingName, hours)
    actor = getplayerbyname(actor)
    local state = getplayvar(actor, "HUMAN", "BuildState")
    if state == "busy" then
        local untilAt = tonumber(getplayvar(actor, "HUMAN", "BuildUntil")) or 0
        sendmsg(actor, 1, "驻地施工中：" ..
            (getplayvar(actor, "HUMAN", "BuildName") or "") ..
            "，预计 " .. math.max(0, math.ceil((untilAt - os.time()) / 3600)) .. " 小时后完工。")
        return
    end
    setplayvar(actor, "HUMAN", "BuildState", "busy", 1)
    setplayvar(actor, "HUMAN", "BuildName", buildingName, 1)
    setplayvar(actor, "HUMAN", "BuildUntil", os.time() + hours * 3600, 1)
    sendmsg(actor, 1, buildingName .. " 已开工，工期 " .. hours .. " 小时。")
end

local function claimBuild(actor)
    actor = getplayerbyname(actor)
    if getplayvar(actor, "HUMAN", "BuildState") ~= "busy" then
        sendmsg(actor, 1, "当前没有施工中的建筑。")
        return
    end
    local untilAt = tonumber(getplayvar(actor, "HUMAN", "BuildUntil")) or 0
    if os.time() < untilAt then
        sendmsg(actor, 1, "尚未完工，剩余 " ..
            math.ceil((untilAt - os.time()) / 60) .. " 分钟。")
        return
    end
    setplayvar(actor, "HUMAN", "BuildState", "idle", 1)
    giveitem(actor, "行会建设券", 1, 1)
    sendmsg(actor, 1, "完工！建设券与建筑加成已生效。")
end