帮会书童：伴读研读的双倍加速

local HIRE_FEE = 300
local function hireBoy(actor)
    if (getplayvar(actor, "GOLD") or 0) < HIRE_FEE then
        sendmsg(actor, 1, "雇佣需 " .. HIRE_FEE .. " 金币")
        return
    end
    setplayvar(actor, "GOLD",
        (getplayvar(actor, "GOLD") or 0) - HIRE_FEE)
    setplayvar(actor, "boyEnd", os.time() + 3 * 86400)
    sendmsg(actor, 1, "书童已雇，研读双倍 3 天")
end

local function studyWithBoy(actor, bookId, mins)
    local boy = (getplayvar(actor, "boyEnd") or 0)
        > os.time()
    local gain = boy and mins * 2 or mins
    setplayvar(actor, "read_" .. bookId,
        (getplayvar(actor, "read_" .. bookId) or 0) + gain)
    sendmsg(actor, 1, "研读 +" .. gain .. " 分钟")
end