Function insert_node

src/entities/collections.rs:803–819

(
    nodes: &mut Vec<CollectionNode>,
    parent_folder_id: Option<Uuid>,
    node: CollectionNode,
)

        node_id: Uuid,
    ) -> Vec<CollectionDestinationEntry> {
        self.destination_entries()
            .into_iter()
            .filter(|entry| {
                if entry.destination.collection_id != source_collection_id {
                    return true;
                }

                match entry.destination.folder_id {
                    Some(folder_id) if folder_id == node_id => false,
                    Some(folder_id) => self
                        .get_node(source_collection_id, node_id)
                        .map(|node| !node.contains_node(folder_id))
                        .unwrap_or(false),
                    None => true,
                }
            })
            .collect()
    }

    pub fn is_empty(&self) -> bool {