Stage 04.2 - journal and event log

app/src/trading/journal/service.py

@@ -0,0 +1,73 @@
+from __future__ import annotations
+
+from typing import Any
+
+from src.storage.repositories.journal import JournalRepository
+from src.storage.session import check_database_health
+
+
+class JournalService:
+    def __init__(self) -> None:
+        self.repository = JournalRepository()
+
+    def log_info(
+        self,
+        event_type: str,
+        message: str,
+        payload: dict[str, Any] | None = None,
+    ) -> None:
+        self.repository.add_event(
+            level="INFO",
+            event_type=event_type,
+            message=message,
+            payload=payload,
+        )
+
+    def log_warning(
+        self,
+        event_type: str,
+        message: str,
+        payload: dict[str, Any] | None = None,
+    ) -> None:
+        self.repository.add_event(
+            level="WARNING",
+            event_type=event_type,
+            message=message,
+            payload=payload,
+        )
+
+    def log_error(
+        self,
+        event_type: str,
+        message: str,
+        payload: dict[str, Any] | None = None,
+    ) -> None:
+        self.repository.add_event(
+            level="ERROR",
+            event_type=event_type,
+            message=message,
+            payload=payload,
+        )
+
+    def get_recent(self, limit: int = 10) -> list[dict[str, str]]:
+        return self.repository.list_recent_events(limit=limit)
+
+    def get_journal_health(self) -> tuple[bool, str]:
+        db_ok, db_message = check_database_health()
+        if not db_ok:
+            return False, f"Журнал недоступен: {db_message}"
+
+        try:
+            total = self.repository.count_events()
+        except Exception as exc:
+            return False, f"Ошибка чтения журнала: {exc}"
+
+        return True, f"Журнал работает. Событий: {total}"
+    
+    def get_page(self, page: int = 1, page_size: int = 3):
+        offset = (page - 1) * page_size
+        return self.repository.list_recent_with_offset(limit=page_size, offset=offset)
+
+
+    def get_total_count(self) -> int:
+        return self.repository.count_events()