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AstrBot/docs/zh/dev/star/guides/simple.md
Soulter fc33b3eb68 docs: transfer AstrBotDevs/AstrBot-docs to AstrBotDevs/AstrBot (#5960)
* docs: transfer AstrBotDevs/AstrBot-docs to AstrBotDevs/AstrBot
* refactor: reorder imports and improve type hints in sync_docs_to_wiki.py and upload_doc_images_to_r2.py
* feat: add GitHub Actions workflow to sync wiki with documentation

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# 最小实例
插件模版中的 `main.py` 是一个最小的插件实例。
```python
from astrbot.api.event import filter, AstrMessageEvent, MessageEventResult
from astrbot.api.star import Context, Star, register
from astrbot.api import logger # 使用 astrbot 提供的 logger 接口
class MyPlugin(Star):
def __init__(self, context: Context):
super().__init__(context)
# 注册指令的装饰器。指令名为 helloworld。注册成功后发送 `/helloworld` 就会触发这个指令,并回复 `你好, {user_name}!`
@filter.command("helloworld")
async def helloworld(self, event: AstrMessageEvent):
'''这是一个 hello world 指令''' # 这是 handler 的描述,将会被解析方便用户了解插件内容。非常建议填写。
user_name = event.get_sender_name()
message_str = event.message_str # 获取消息的纯文本内容
logger.info("触发hello world指令!")
yield event.plain_result(f"Hello, {user_name}!") # 发送一条纯文本消息
async def terminate(self):
'''可选择实现 terminate 函数,当插件被卸载/停用时会调用。'''
```
解释如下:
- 插件需要继承 `Star` 类。
- `Context` 类用于插件与 AstrBot Core 交互,可以由此调用 AstrBot Core 提供的各种 API。
- 具体的处理函数 `Handler` 在插件类中定义,如这里的 `helloworld` 函数。
- `AstrMessageEvent` 是 AstrBot 的消息事件对象,存储了消息发送者、消息内容等信息。
- `AstrBotMessage` 是 AstrBot 的消息对象,存储了消息平台下发的消息的具体内容。可以通过 `event.message_obj` 获取。
> [!TIP]
>
> `Handler` 一定需要在插件类中注册,前两个参数必须为 `self` 和 `event`。如果文件行数过长,可以将服务写在外部,然后在 `Handler` 中调用。
>
> 插件类所在的文件名需要命名为 `main.py`。
所有的处理函数都需写在插件类中。为了精简内容,在之后的章节中,我们可能会忽略插件类的定义。