帮会医馆：帮贡诊金的折扣药品

local DISCOUNT = {1.0, 0.9, 0.8, 0.7}
local function buyMedicine(actor, guild)
    local lv = getsysvar("gLevel_" .. guild) or 1
    local price = math.floor(200 * DISCOUNT[lv])
    if (getplayvar(actor, "contribute") or 0) < price then
        sendmsg(actor, 1, "帮贡不足，诊金 " .. price)
        return
    end
    local n = getplayvar(actor, "mediN") or 0
    if n >= 5 then
        sendmsg(actor, 1, "今日限购 5 瓶")
        return
    end
    setplayvar(actor, "contribute",
        (getplayvar(actor, "contribute") or 0) - price)
    setplayvar(actor, "mediN", n + 1)
    giveitem(actor, 8801, 1)
end

local function queryMedi(actor)
    sendmsg(actor, 1, "今日已购 "
        .. (getplayvar(actor, "mediN") or 0) .. "/5 瓶")
end