download backup admin possibility

app/routes/backups.py

@@ -1,11 +1,12 @@
 import html
 from pathlib import Path
+from urllib.parse import quote
 
-from fastapi import APIRouter, Depends, Form, Request
-from fastapi.responses import HTMLResponse, RedirectResponse
+from fastapi import APIRouter, Depends, Form, HTTPException, Request
+from fastapi.responses import FileResponse, HTMLResponse, RedirectResponse
 
 from ..auth import require_user
-from ..backups import is_backup_path, list_backups
+from ..backups import backup_dir, is_backup_path, list_backups
 from ..config import BACKUP_SCRIPT
 from ..db.audit import log_audit_event
 from ..shell import run_command
@@ -14,14 +15,25 @@ from ..templates.layout import page, render_result
 router = APIRouter()
 
 
+def is_admin(user) -> bool:
+    return (user.get("role") or "").lower() == "admin"
+
+
 @router.get("/backups", response_class=HTMLResponse)
 def backups_page(request: Request, user=Depends(require_user)):
     rows = ""
+    can_download = is_admin(user)
 
     for path in list_backups():
         size_mb = path.stat().st_size / 1024 / 1024
         backup_name = html.escape(path.name)
         backup_path = html.escape(str(path), quote=True)
+        backup_url_name = quote(path.name, safe="")
+        download_action = (
+            f'<p><a class="btn btn-secondary" href="/portal/backups/download/{backup_url_name}">Stáhnout</a></p>'
+            if can_download
+            else ""
+        )
 
         restore_cmd = html.escape(
             f"sudo /home/jiri/workspace/appfactory-tools/scripts/restore-appfactory.sh --force {path}",
@@ -48,6 +60,7 @@ def backups_page(request: Request, user=Depends(require_user)):
                 <div class="muted">Obnova je nebezpečná a musí se spustit ručně přes SSH.</div>
             </td>
             <td class="actions-cell">
+                {download_action}
                 <form method="post" action="/portal/backups/delete" onsubmit="return confirm('Smazat zálohu {backup_name}?');">
                     <input type="hidden" name="backup_path" value="{backup_path}">
                     <button type="submit" class="danger">Smazat</button>
@@ -92,6 +105,34 @@ def backups_page(request: Request, user=Depends(require_user)):
     )
 
 
+@router.get("/backups/download/{backup_name}")
+def download_backup(backup_name: str, user=Depends(require_user)):
+    if not is_admin(user):
+        raise HTTPException(status_code=403, detail="Only admins can download backups")
+
+    target = backup_dir() / backup_name
+    if not is_backup_path(target):
+        raise HTTPException(status_code=400, detail="Invalid backup path")
+
+    target = target.resolve()
+    if not target.exists() or not target.is_file():
+        raise HTTPException(status_code=404, detail="Backup not found")
+
+    log_audit_event(
+        user,
+        action="backup_download",
+        target_type="backup",
+        target_id=target.name,
+        metadata={"backup_path": str(target)},
+    )
+
+    return FileResponse(
+        path=target,
+        filename=target.name,
+        media_type="application/gzip",
+    )
+
+
 @router.post("/backups/create", response_class=HTMLResponse)
 def create_backup(user=Depends(require_user)):
     result = run_command([BACKUP_SCRIPT])