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Merge pull request #62 from langbot-app/feat/new-plugin
Feat/new plugin
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# 组件:命令
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命令组件由用户通过`!`(或其他已设置的前缀)开头的命令消息触发。如下是命令`!help`的触发示例:
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<img width="600" src="/assets/image/zh/plugin/dev/components/command_use.png" />
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## 添加命令组件
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单个插件中能添加任意数量的命令,请在插件目录执行命令`lbp comp Command`,并根据提示输入命令的配置。
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```bash
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➜ HelloPlugin > lbp comp Command
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Generating component Command...
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Command name: info
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Command description: Show information of the query
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Component Command generated successfully.
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组件 Command 生成成功。
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```
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现在即会在`components/commands/`目录下生成`info.yaml`和`info.py`文件,`.yaml`定义了`!info`命令的基础信息,`.py`是该命令的处理程序:
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```bash
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➜ HelloPlugin > tree
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...
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├── components
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│ ├── __init__.py
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│ ├── commands
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│ │ ├── __init__.py
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│ │ ├── info.py
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│ │ └── info.yaml
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...
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```
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## 清单文件:命令组件
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```yaml
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apiVersion: v1 # 请勿修改
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kind: Command # 请勿修改
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metadata:
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name: info # 命令名称,在使用时,用户会通过 !info 触发该命令
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label: # 命令显示名称,用于显示在 LangBot 的 UI 上,支持多语言
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en_US: Info
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zh_Hans: Info
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description: # 命令描述,用于显示在 LangBot 的 UI 上,支持多语言。可选。
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en_US: 'Show information of the query'
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zh_Hans: '发送此次消息的详细信息'
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spec:
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execution:
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python:
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path: info.py # 命令处理程序,请勿修改
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attr: Info # 命令处理程序的类名,与 info.py 中的类名一致
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```
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## 插件处理
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默认会生成如下代码(components/command/<命令名称>.py),您需要在`Info`类的`initialize`方法中注册并实现子命令的处理逻辑。
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```python
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# Auto generated by LangBot Plugin SDK.
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# Please refer to https://docs.langbot.app/en/plugin/dev/tutor.html for more details.
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from __future__ import annotations
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from typing import Any, AsyncGenerator
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from langbot_plugin.api.definition.components.command.command import Command, Subcommand
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from langbot_plugin.api.entities.builtin.command.context import ExecuteContext, CommandReturn
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class Info(Command):
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async def initialize(self):
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await super().initialize()
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"Fill with your code here"
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```
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添加子命令:
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```python
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...
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class Info(Command):
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async def initialize(self):
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await super().initialize()
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@self.subcommand(
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name="", # 空字符串表示根命令
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help="Show information of the query", # 命令帮助信息
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usage="info", # 命令使用示例,显示在命令帮助信息中
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aliases=["i"], # 命令别名
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)
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async def send(self, context: ExecuteContext) -> AsyncGenerator[CommandReturn, None]:
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print(context)
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reply_text = f"Query ID: {context.query_id}\n"
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reply_text += f"command: {context.command}\n"
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reply_text += f"command_text: {context.command_text}\n"
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reply_text += f"params: {context.params}\n"
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reply_text += f"crt_params: {context.crt_params}\n"
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reply_text += f"privilege: {context.privilege}\n"
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reply_text += f"session: {context.session.launcher_type.value}_{context.session.launcher_id}\n"
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yield CommandReturn(
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text=reply_text,
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)
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@self.subcommand(
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name="field",
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help="Show information of the field",
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usage="info field",
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aliases=["f"],
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)
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async def field(self, context: ExecuteContext) -> AsyncGenerator[CommandReturn, None]:
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print(context)
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field_name = context.crt_params[0]
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field_value = getattr(context, field_name)
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yield CommandReturn(
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text=f"{field_name}: {field_value}",
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)
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```
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该代码中,`send`函数通过装饰器`@self.subcommand`注册为子命令,并在其中打印了命令的上下文(ExecuteContext)信息并拼接成一条回复消息。
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### 子命令注册
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`name` 为子命令名称,留空表示处理主命令。不为空则匹配第二个参数为命令,例如:
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- `!info` 匹配 name="" 的子命令
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- `!info field` 匹配 name="field" 的子命令
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- `!info field value` 匹配 name="field" 的子命令,`value` 为子命令参数
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子命令函数中,可通过 `context` 变量读取到命令参数。
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上述命令效果如图:
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<img width="600" src="/assets/image/zh/plugin/dev/components/info_command_demo.png" />
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### 命令上下文
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```python
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class ExecuteContext(pydantic.BaseModel):
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"""单次命令执行上下文"""
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query_id: int
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"""请求ID"""
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session: provider_session.Session
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"""本次消息所属的会话对象"""
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command_text: str
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"""命令完整文本"""
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command: str
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"""命令名称"""
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crt_command: str
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"""当前命令
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多级命令中crt_command为当前命令,command为根命令。
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例如:!plugin on Webwlkr
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处理到plugin时,command为plugin,crt_command为plugin
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处理到on时,command为plugin,crt_command为on
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"""
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params: list[str]
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"""命令参数
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整个命令以空格分割后的参数列表
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"""
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crt_params: list[str]
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"""当前命令参数
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多级命令中crt_params为当前命令参数,params为根命令参数。
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例如:!plugin on Webwlkr
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处理到plugin时,params为['on', 'Webwlkr'],crt_params为['on', 'Webwlkr']
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处理到on时,params为['on', 'Webwlkr'],crt_params为['Webwlkr']
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"""
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privilege: int
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"""会话权限级别"""
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...
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```
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### 命令返回值
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命令返回值(CommandReturn)目前支持返回文本(text)和图片(image_url,图片链接)、错误(error)。
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```python
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yield CommandReturn(
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text=reply_text,
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)
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yield CommandReturn(
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image_url=image_url,
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)
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```
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命令处理支持返回多条消息,故请使用`yield`语句返回消息。
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具体的返回值请参考`CommandReturn`的定义:[langbot_plugin.api.entities.builtin.command.context.CommandReturn](https://github.com/langbot-app/langbot-plugin-sdk/tree/main/src/langbot_plugin/api/entities/builtin/command/context.py)
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## 接下来做什么
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您已经了解了命令注册和命令执行的基本信息,接下来可以:
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- 查看[插件通用 API](/zh/plugin/dev/apis/common)
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