ref #6: [feat] add impl in memory session repository

repository/sandbox_session.py

@@ -0,0 +1,28 @@
+from datetime import datetime
+
+from domain.sandbox import SandboxSession
+from usecase.interface import SandboxSessionRepository
+
+
+class InMemorySandboxSessionRepository(SandboxSessionRepository):
+    def __init__(self) -> None:
+        self._sessions_by_chat_id: dict[str, SandboxSession] = {}
+
+    def get_active_by_chat_id(self, chat_id: str) -> SandboxSession | None:
+        return self._sessions_by_chat_id.get(chat_id)
+
+    def list_expired(self, now: datetime) -> list[SandboxSession]:
+        return [
+            session
+            for session in self._sessions_by_chat_id.values()
+            if session.expires_at <= now
+        ]
+
+    def save(self, session: SandboxSession) -> None:
+        self._sessions_by_chat_id[session.chat_id] = session
+
+    def delete(self, session_id: str) -> None:
+        for chat_id, session in tuple(self._sessions_by_chat_id.items()):
+            if session.session_id == session_id:
+                del self._sessions_by_chat_id[chat_id]
+                return