1. Refine my code 小结我的任务逻辑代码 by Phay Tsukiming Twitter:@phaytsukiming Gtalk/email:moonsolo@gmail.com

2. 从需求说起 我们假设一个场景，有3个npc，king，princess, dragon, 玩家刚进场 1.骑士初来乍到，看谁都新鲜，和三个npc逐一对话， 公主：“龙要吃我” 恶龙：“我要吃她” 国王：“啊，你要救我的女儿吗？ 1.愿意效劳 2.我还怕龙吃我呢

3. 选择1 这时候，再和npc对话， 公主：“你是来救我的吗，英雄~~” 国王：“我的女儿，命好苦哇~~” 恶龙：“我晕，这国王都2到啥程度了，派你来救公主，这不小看哥么”–切入战斗

4. 第一幕结束 任务，游戏里的一种状态，不同任务下相同实体会有不同的行为，对话自然也算—“多态” 我们就从公主开始说，

5. class Prince: def chat(self, player): self.say(player, "ah~help me") class Prince: def chat(self, player): if player.get_task()=="first_meet": self.say(player, "oh~are your here to save my soul") elif player.get_task()=="second_meet": self.say(player, "oh~you need a sword, my hero") elif player.get_task()=="beated_boss": self.say(player, "will u marry me, my hero") #...... 但是，好像这样写，似乎有点丑。。。。

6. Data/table-driven class Prince: TaskChat = { "first_meet":"oh~are your here to save my soul", "second_meet":"oh~you need a sword, my hero", "beated_boss":"will u marry me, my hero", } def chat(self, player): self.say(player, self.TaskChat[player.get_task()]) Well, 静态对话满足了，如果动态数据，额。。。用lambda？ ………… “first_meet”:(lambda data:”oh~are you here to save my soul, are you %s” % data), ……….. 如果点击了npc，以后有的要战斗，有的要发奖，有的要播动画

7. Responsbility Driven class Prince: def trigger(self, player): player.get_task().princess_trigger(self, player) class FirstMeet: def princess_trigger(self, player): self.say(player, "oh~are you here to save my soul") #blablabla...... 额。。。。这样只有公主，那老丈人会有意见，老丈人可是国王啊，还有各种七大姑八大姨，这样写内聚度会越来越低，所以我们放一个大招：

8. Responsbility Driven class Princess: def trigger(self, player): get_task_mod(player.get_task(), "Princess").trigger(player) class Princess: def trigger(self, player): self.say(player, "oh~are your here to save my soul") class King: def trigger(self, player): self.say(player, “I‘m so appreciated for you saving my daughter’s life”) 差不多了，但事件触发的管理方式，事件触发么。。

9. 用一个简化到极致observer轻松搞定 class FirstMeet: def acquired(self, player): player.add_task("FirstMeet") npc_trigger_mgr.add_listener(player, "princess", Princess) class NpcTriggerMgr: def trigger(self, npc, player): if npc.get_name() in player_trigger_dict[player.id]: task_handle = player_trigger_dict[player.id]["princess"] task_handle[npc.get_name()].trigger(player) def add_listener(self, player, npc_name, class_handle): player_trigger_dict[player.id]["princess"] = class_handle

10. Fin