feat: add summary and search commands (#54)

* feat: add summary and search commands

Signed-off-by: Frost Ming <me@frostming.com>

* fix formats

Signed-off-by: Frost Ming <me@frostming.com>

* fix: clean up

Signed-off-by: Frost Ming <me@frostming.com>

handlers/summary/utils.py

@@ -0,0 +1,48 @@
+import re
+import zoneinfo
+from datetime import datetime, timedelta
+
+from telebot import TeleBot
+from telebot.types import Message
+
+PROMPT = """\
+请将下面的聊天记录进行总结，包含讨论了哪些话题，有哪些亮点发言和主要观点。
+引用用户名请加粗。直接返回内容即可，不要包含引导词和标题。
+--- Messages Start ---
+{messages}
+--- Messages End ---
+"""
+
+
+def filter_message(message: Message, bot: TeleBot) -> bool:
+    """过滤消息，排除非文本消息和命令消息"""
+    if not message.text:
+        return False
+    if not message.from_user:
+        return False
+    if message.from_user.id == bot.get_me().id:
+        return False
+    if message.text.startswith("/"):
+        return False
+    return True
+
+
+date_regex = re.compile(r"^(\d+)([dhm])$")
+
+
+def parse_date(date_str: str, locale: str) -> tuple[datetime, datetime]:
+    date_str = date_str.strip().lower()
+    now = datetime.now(tz=zoneinfo.ZoneInfo(locale))
+    if date_str == "today":
+        return now.replace(hour=0, minute=0, second=0, microsecond=0), now
+    elif m := date_regex.match(date_str):
+        number = int(m.group(1))
+        unit = m.group(2)
+        match unit:
+            case "d":
+                return now - timedelta(days=number), now
+            case "h":
+                return now - timedelta(hours=number), now
+            case "m":
+                return now - timedelta(minutes=number), now
+    raise ValueError(f"Unsupported date format: {date_str}")