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💡 add comment to describe template formatter usage
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@ -333,6 +333,28 @@ class Message(List[TMS], abc.ABC):
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@classmethod
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def template(cls: Type[TM], format_string: str) -> MessageFormatter[TM]:
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"""
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:说明:
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根据创建消息模板, 用法和 ``str.format`` 大致相同, 但是可以输出消息对象
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:示例:
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.. code-block:: python
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>>> Message.template("{} {}").format("hello", "world")
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Message(MessageSegment(type='text', data={'text': 'hello world'}))
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>>> Message.template("{} {}").format(MessageSegment.image("file///..."), "world")
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Message(MessageSegment(type='image', data={'file': 'file///...'}), MessageSegment(type='text', data={'text': 'world'}))
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:参数:
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* ``format_string: str``: 格式化字符串
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:返回:
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- ``MessageFormatter[TM]``: 消息格式化器
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"""
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return MessageFormatter(cls, format_string)
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@classmethod
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@ -11,12 +11,18 @@ TM = TypeVar("TM", bound="Message")
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class MessageFormatter(Formatter, Generic[TM]):
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"""消息模板格式化实现类"""
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def __init__(self, factory: Type[TM], template: str) -> None:
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self.template = template
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self.factory = factory
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def format(self, *args: Any, **kwargs: Any) -> TM:
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"""
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:说明:
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根据模板和参数生成消息对象
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"""
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msg = self.vformat(self.template, args, kwargs)
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return msg if isinstance(msg, self.factory) else self.factory(msg)
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