77 lines
2.1 KiB
Python
77 lines
2.1 KiB
Python
from dataclasses import dataclass
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from math import ceil
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from typing import Any, Callable
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from nonebot_plugin_alconna import UniMessage
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@dataclass
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class PagerQuery:
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page_index: int
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page_size: int
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def apply[T](self, ls: list[T]) -> "PagerResult[T]":
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if self.page_size <= 0:
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return PagerResult(
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success=False,
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message="每页元素数量应该大于 0",
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data=[],
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page_count=-1,
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query=self,
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)
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page_count = ceil(len(ls) / self.page_size)
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if self.page_index <= 0 or self.page_size <= 0:
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return PagerResult(
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success=False,
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message="页数必须大于 0",
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data=[],
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page_count=page_count,
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query=self,
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)
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data = ls[(self.page_index - 1) * self.page_size: self.page_index * self.page_size]
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if len(data) > 0:
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return PagerResult(
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success=True,
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message="",
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data=data,
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page_count=page_count,
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query=self,
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)
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return PagerResult(
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success=False,
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message="指定的页数超过最大页数",
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data=data,
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page_count=page_count,
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query=self,
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)
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@dataclass
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class PagerResult[T]:
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data: list[T]
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success: bool
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message: str
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page_count: int
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query: PagerQuery
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def to_unimessage(
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self,
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formatter: Callable[[T], str | UniMessage[Any]] = str,
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title: str = '查询结果',
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list_indicator: str = '- ',
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) -> UniMessage[Any]:
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msg = UniMessage.text(f'===== {title} =====\n\n')
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if not self.success:
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msg = msg.text(f'⚠️ {self.message}\n')
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else:
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for obj in self.data:
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msg = msg.text(list_indicator)
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msg += formatter(obj)
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msg += '\n'
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msg = msg.text(f'\n===== 第 {self.query.page_index} 页，共 {self.page_count} 页 =====')
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return msg
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