【进阶实战】酒馆任务板：日常任务的自然刷新封装

local POOL = { "讨伐祖玛教主", "清剿沃玛战士", "护送矿石",
    "收集毒蛇胆", "猎杀白野猪", "巡视比奇边界" }
local DAY_MAX = 3
local function todayTasks()
    local seed = math.floor(os.time() / 86400)
    math.randomseed(seed)
    local tasks, used = {}, {}
    while #tasks < DAY_MAX do
        local idx = math.random(1, #POOL)
        if not used[idx] then
            used[idx] = true
            tasks[#tasks + 1] = POOL[idx]
        end
    end
    return tasks
end

local function accept(actor, taskName)
    local dayKey = "TaskDone_" .. math.floor(os.time() / 86400)
    local done = tostring(getplayvar(actor, 1, dayKey) or "")
    if string.find(done, taskName, 1, true) then
        sendmsg(actor, 1, taskName .. " 今日已完成。")
        return
    end
    setplayvar(actor, 1, dayKey, done .. taskName .. ";", 1)
    sendmsg(actor, 1, "接取成功：" .. taskName)
end