【框架设计】装备鉴定：未鉴定装备的 rolls 与稀有度

---鉴定：消耗鉴定符，生成词条
function Identify.run(actor, makeIndex)
    local item = Identify.locate(actor, makeIndex)
    if not item then
        sendmsg(actor, 1, "物品不存在")
        return false
    end
    if not checkitemw(actor, "鉴定符", 1) then
        sendmsg(actor, 1, "缺少鉴定符")
        return false
    end
    takeitem(actor, "鉴定符", 1, 0, "装备鉴定")
    local rolls = Identify.roll(item)
    setitemstate(item, 3, rolls.rarity)
    Identify.apply(item, rolls)
    sendmsg(actor, 1, "鉴定完成：" ..
        Identify.rarityName(rolls.rarity))
    return true
end

---词条掷骰：稀有度决定条数与数值档
function Identify.roll(item)
    local r = math.random(1, 10000)
    local rarity = (r <= 50 and 3) or (r <= 2500 and 2) or 1
    -- 稀有度：1 白 2 蓝 3 金，词条数 1/2/3
    local n = rarity
    local attrs = {}
    for i = 1, n do
        attrs[#attrs + 1] = Identify.pickWord(item, rarity)
    end
    return { rarity = rarity, attrs = attrs }
end

---连续未出蓝装的保底
function Identify.pityCheck(actor)
    local cnt = tonumber(getplayvar(actor, 2, "IdPity")) or 0
    if cnt >= 29 then
        setplayvar(actor, 2, "IdPity", 0, 1)
        return 2     -- 保底蓝装
    end
    setplayvar(actor, 2, "IdPity", cnt + 1, 1)
    return nil
end