添加一个可供管理的订阅制模块，并且接入 KonaPH

konabot/common/pager.py

@@ -0,0 +1,76 @@
+from dataclasses import dataclass
+from math import ceil
+from typing import Any, Callable
+
+from nonebot_plugin_alconna import UniMessage
+
+
+@dataclass
+class PagerQuery:
+    page_index: int
+    page_size: int
+
+    def apply[T](self, ls: list[T]) -> "PagerResult[T]":
+        if self.page_size <= 0:
+            return PagerResult(
+                success=False,
+                message="每页元素数量应该大于 0",
+                data=[],
+                page_count=-1,
+                query=self,
+            )
+        page_count = ceil(len(ls) / self.page_size)
+        if self.page_index <= 0 or self.page_size <= 0:
+            return PagerResult(
+                success=False,
+                message="页数必须大于 0",
+                data=[],
+                page_count=page_count,
+                query=self,
+            )
+        data = ls[(self.page_index - 1) * self.page_size: self.page_index * self.page_size]
+        if len(data) > 0:
+            return PagerResult(
+                success=True,
+                message="",
+                data=data,
+                page_count=page_count,
+                query=self,
+            )
+        return PagerResult(
+            success=False,
+            message="指定的页数超过最大页数",
+            data=data,
+            page_count=page_count,
+            query=self,
+        )
+
+
+@dataclass
+class PagerResult[T]:
+    data: list[T]
+    success: bool
+    message: str
+    page_count: int
+    query: PagerQuery
+
+    def to_unimessage(
+        self,
+        formatter: Callable[[T], str | UniMessage[Any]] = str,
+        title: str = '查询结果',
+        list_indicator: str = '- ',
+    ) -> UniMessage[Any]:
+        msg = UniMessage.text(f'===== {title} =====\n\n')
+
+        if not self.success:
+            msg = msg.text(f'⚠️ {self.message}\n')
+        else:
+            for obj in self.data:
+                msg = msg.text(list_indicator)
+                msg += formatter(obj)
+                msg += '\n'
+
+        msg = msg.text(f'\n===== 第 {self.query.page_index} 页，共 {self.page_count} 页 =====')
+        return msg
+
+