Implement the service to list items in the root folder.

backend/application/src/video/service.rs

@@ -5,7 +5,7 @@ use std::io::{BufRead, BufReader};
 use std::path::Path;
 use std::io::Read;
 use lumiere_domain::video::error::VideoError;
-use lumiere_domain::video::model::library_item::LibraryItem;
+use lumiere_domain::video::model::library_item::{LibraryItem, ReadLibraryItem};
 use lumiere_domain::video::port::VideoPort;
 
 #[derive(Clone)]
@@ -19,15 +19,12 @@ impl VideoService {
     }
 
     pub fn list_root_folder(self) -> Result<Vec<LibraryItem>, VideoError> {
-        let library_items = self.video_port.list_root_folder()?;
-
-        let items_without_id = library_items.iter().filter(|item| item.id == None);
-        // generate a new Uuid for each item without id
-        // assign this new Uuid to the item
-        // save the item by using the method video_port.save
-        // replace the items_without_id by modified items_without_id
-
-        Ok(vec!())
+        let read_items_with_possibly_no_id = self.video_port.list_root_folder()?;
+        let items_with_id = read_items_with_possibly_no_id.iter()
+            .map(ReadLibraryItem::map_to_library_item)
+            .collect();
+        self.video_port.save_all(items_with_id);
+        Ok(items_with_id)
     }
 }