【进阶实战】工厂模式：按类型创建副本实例

local creators = {}
local function registerCreator(typeId, fn)
    creators[typeId] = fn
end
local function newInstance(typeId, cfg)
    local creator = creators[typeId]
    if creator == nil then
        sendmsg(nil, 1, "未知副本类型：" .. tostring(typeId))
        return nil
    end
    local inst = {
        typeId = typeId,
        state = "open",
        createTime = os.time(),
        maxPlayers = 5,
    }
    creator(inst, cfg)
    return inst
end
registerCreator("solo", function(inst, cfg)
    inst.maxPlayers = 1
    inst.boss = "沃玛教主"
end
)
registerCreator("guild", function(inst, cfg)
    inst.maxPlayers = 30
    inst.guild = cfg.guild
    inst.boss = "祖玛教主"
end
)

registerCreator("mentor", function(inst, cfg)
    inst.maxPlayers = 6
    inst.master = cfg.master
end
)
local inst = newInstance("guild", { guild = "兄弟情深" })