Add Telegram topic binding command

tests/test_bot_basic_handler.py

@@ -11,6 +11,7 @@ class DummyBot:
         self.approved_join_requests = []
         self.declined_join_requests = []
         self.callback_handlers = []
+        self.chat_member_status = "administrator"
 
     def reply_to(self, message, text, parse_mode=None, disable_web_page_preview=None, **kwargs):
         self.replies.append(
@@ -65,6 +66,9 @@ class DummyBot:
     def decline_chat_join_request(self, chat_id, user_id):
         self.declined_join_requests.append({"chat_id": chat_id, "user_id": user_id})
 
+    def get_chat_member(self, chat_id, user_id):
+        return SimpleNamespace(status=self.chat_member_status)
+
 
 def _message(text: str):
     return SimpleNamespace(
@@ -74,6 +78,15 @@ def _message(text: str):
     )
 
 
+def _topic_message(text: str, *, thread_id: int = 13102):
+    return SimpleNamespace(
+        text=text,
+        from_user=SimpleNamespace(id=1, username="admin", first_name="Admin"),
+        chat=SimpleNamespace(id=-1003927451869, type="supergroup"),
+        message_thread_id=thread_id,
+    )
+
+
 def test_basic_handler_diag_returns_html():
     runtime = RuntimeStatus(
         started_at="2026-03-12 00:00:00 UTC",
@@ -100,6 +113,78 @@ def test_basic_handler_diag_returns_html():
     assert "Bot 启动诊断" in bot.replies[0]["text"]
 
 
+def test_bindtopic_records_current_forum_thread(monkeypatch):
+    import src.bot.handlers.basic as basic
+
+    saved = []
+    monkeypatch.setenv("TELEGRAM_CHAT_IDS", "-1003927451869")
+    monkeypatch.setenv("POLYWEATHER_TELEGRAM_GROUP_ID", "-1003927451869")
+    monkeypatch.setattr(
+        basic,
+        "record_city_thread_id",
+        lambda city, thread_id: saved.append((city, thread_id))
+        or {"city": city, "thread_id": thread_id},
+    )
+
+    bot = DummyBot()
+    handler = BasicCommandHandler(
+        bot=bot,
+        io_layer=SimpleNamespace(
+            build_welcome_text=lambda: "WELCOME",
+            build_points_rank_text=lambda _user: "TOP",
+        ),
+        runtime_status_provider=lambda: RuntimeStatus(
+            started_at="2026-03-12 00:00:00 UTC",
+            loops=[],
+            command_access_mode="public",
+            protected_commands=[],
+            required_group_chat_id="-1003927451869",
+        ),
+    )
+
+    result = handler.handle_bindtopic(_topic_message("/bindtopic seoul"))
+
+    assert result == "bound"
+    assert saved == [("seoul", 13102)]
+    assert "seoul" in bot.replies[0]["text"].lower()
+    assert "13102" in bot.replies[0]["text"]
+
+
+def test_bindtopic_rejects_non_admin(monkeypatch):
+    import src.bot.handlers.basic as basic
+
+    saved = []
+    monkeypatch.setenv("TELEGRAM_CHAT_IDS", "-1003927451869")
+    monkeypatch.setattr(
+        basic,
+        "record_city_thread_id",
+        lambda city, thread_id: saved.append((city, thread_id)),
+    )
+
+    bot = DummyBot()
+    bot.chat_member_status = "member"
+    handler = BasicCommandHandler(
+        bot=bot,
+        io_layer=SimpleNamespace(
+            build_welcome_text=lambda: "WELCOME",
+            build_points_rank_text=lambda _user: "TOP",
+        ),
+        runtime_status_provider=lambda: RuntimeStatus(
+            started_at="2026-03-12 00:00:00 UTC",
+            loops=[],
+            command_access_mode="public",
+            protected_commands=[],
+            required_group_chat_id="-1003927451869",
+        ),
+    )
+
+    result = handler.handle_bindtopic(_topic_message("/bindtopic seoul"))
+
+    assert result == "unauthorized"
+    assert saved == []
+    assert "管理员" in bot.replies[0]["text"]
+
+
 def test_start_bind_token_binds_telegram_to_web_account():
     bot = DummyBot()
     consumed = []