from rest_framework.permissions import BasePermission


class IsOwner(BasePermission):
    """Library items and albums are private by default — only the owner may
    read or write them through these endpoints. Sharing happens explicitly
    via Moments / AlbumCollaborators, handled by their own views."""

    def has_object_permission(self, request, view, obj):
        return obj.owner_id == request.user.id