Enhance PVideoDl with finished_at tracking for downloads and UI updates. Added finished_at field to Download model, updated storage to handle legacy databases, and improved frontend to display recent downloads. Refactored scripts for better clarity and error handling.

app/core/storage.py

@@ -8,7 +8,7 @@ from __future__ import annotations
 
 import json
 from abc import ABC, abstractmethod
-from datetime import datetime
+from datetime import datetime, timezone
 from pathlib import Path
 from typing import Any
 
@@ -17,6 +17,10 @@ import aiosqlite
 from app.models import Download, DownloadStatus
 
 
+def _now() -> datetime:
+    return datetime.now(timezone.utc)
+
+
 class Storage(ABC):
     @abstractmethod
     async def init(self) -> None: ...
@@ -52,6 +56,7 @@ _COLUMNS = (
     "eta",
     "error",
     "created_at",
+    "finished_at",
 )
 
 
@@ -59,6 +64,8 @@ def _row_to_download(row: aiosqlite.Row) -> Download:
     data = dict(row)
     data["status"] = DownloadStatus(data["status"])
     data["created_at"] = datetime.fromisoformat(data["created_at"])
+    if data.get("finished_at"):
+        data["finished_at"] = datetime.fromisoformat(data["finished_at"])
     return Download.model_validate(data)
 
 
@@ -98,22 +105,36 @@ class SqliteStorage(Storage):
                 speed            REAL,
                 eta              REAL,
                 error            TEXT,
-                created_at       TEXT NOT NULL
+                created_at       TEXT NOT NULL,
+                finished_at      TEXT
             )
             """
         )
+        # Миграция старых БД, созданных до появления finished_at.
+        await self._migrate_add_column("finished_at", "TEXT")
         # На старте всё, что осталось "качающимся" после прошлого запуска,
         # помечаем упавшим — воркеры этого процесса о них не знают.
         await self._db.execute(
-            "UPDATE downloads SET status = ?, error = ? WHERE status = ?",
+            "UPDATE downloads SET status = ?, error = ?, finished_at = ? "
+            "WHERE status = ?",
             (
                 DownloadStatus.FAILED.value,
                 "Прервано при перезапуске приложения",
+                _now().isoformat(),
                 DownloadStatus.DOWNLOADING.value,
             ),
         )
         await self._db.commit()
 
+    async def _migrate_add_column(self, name: str, decl: str) -> None:
+        """Добавить колонку, если её ещё нет (idempotent-миграция старых БД)."""
+        async with self._conn.execute("PRAGMA table_info(downloads)") as cursor:
+            cols = {row["name"] for row in await cursor.fetchall()}
+        if name not in cols:
+            await self._conn.execute(
+                f"ALTER TABLE downloads ADD COLUMN {name} {decl}"
+            )
+
     async def close(self) -> None:
         if self._db is not None:
             await self._db.close()