se agregaron nuevas caracteristicas

backend/app/services/settings_service.py

@@ -0,0 +1,67 @@
+from sqlalchemy.ext.asyncio import AsyncSession
+from sqlalchemy import select
+from app.models.models import SystemSetting
+from app.core.config import settings
+from pathlib import Path
+import os
+
+DEFAULT_SETTINGS = {
+    "storage_root": settings.STORAGE_ROOT,
+    "global_quota_gb": "1000",
+    "default_client_quota_gb": "100",
+    "default_keep_daily": str(settings.DEFAULT_RETENTION_DAILY),
+    "default_keep_weekly": str(settings.DEFAULT_RETENTION_WEEKLY),
+    "default_keep_monthly": str(settings.DEFAULT_RETENTION_MONTHLY),
+}
+
+async def get_setting(db: AsyncSession, key: str) -> str:
+    result = await db.execute(select(SystemSetting).where(SystemSetting.key == key))
+    setting = result.scalar_one_or_none()
+    if setting:
+        return setting.value
+    return DEFAULT_SETTINGS.get(key, "")
+
+async def get_all_settings(db: AsyncSession) -> dict:
+    result = await db.execute(select(SystemSetting))
+    db_settings = {s.key: s.value for s in result.scalars().all()}
+    
+    # Merge defaults and add them if not present in db
+    updated = False
+    for k, v in DEFAULT_SETTINGS.items():
+        if k not in db_settings:
+            db_settings[k] = v
+            db.add(SystemSetting(key=k, value=v))
+            updated = True
+    if updated:
+        await db.commit()
+    return db_settings
+
+async def update_settings_service(db: AsyncSession, new_settings: dict) -> dict:
+    from app.storage.local import storage_provider
+    
+    for k, v in new_settings.items():
+        if k in DEFAULT_SETTINGS and v is not None:
+            # If changing storage root, validate and apply
+            if k == "storage_root":
+                path = Path(v).resolve()
+                try:
+                    os.makedirs(path, exist_ok=True)
+                    # Test write access
+                    test_file = path / ".write_test"
+                    test_file.touch()
+                    test_file.unlink()
+                except Exception as e:
+                    raise ValueError(f"Invalid or unwritable storage root path: {str(e)}")
+                
+                # Apply to in-memory storage provider
+                storage_provider.root_dir = path
+                
+            result = await db.execute(select(SystemSetting).where(SystemSetting.key == k))
+            setting = result.scalar_one_or_none()
+            if setting:
+                setting.value = str(v)
+            else:
+                db.add(SystemSetting(key=k, value=str(v)))
+                
+    await db.commit()
+    return await get_all_settings(db)