Implement the video adapter to retrieve the root folder content.

backend/infrastructure/src/video/adapter.rs

@@ -6,6 +6,7 @@ use uuid::Uuid;
 use std::env;
 use std::fs;
 
+#[derive(Clone)]
 pub struct VideoAdapter {
 
 }
@@ -50,20 +51,16 @@ impl VideoAdapter {
         Ok(items)
     }
 
-    pub fn get_all_library_items_from_db(&self) -> Result<Vec<LibraryRawItem>, VideoError> {
+    fn get_all_library_items_from_db(&self) -> Result<Vec<LibraryRawItem>, VideoError> {
         Ok(vec!())
     }
 
     fn merge_item_lists(file_system_items: Vec<LibraryRawItem>, db_items: Vec<LibraryRawItem>) -> Vec<LibraryRawItem> {
-        let mut all_items: Vec<LibraryRawItem> = Vec::new();
+        let file_system_items_which_are_not_in_database: Vec<LibraryRawItem> = file_system_items.into_iter()
+            .filter(|file_system_item| !Self::does_item_belong_to_db_items(&db_items, &file_system_item))
+            .collect();
 
-        db_items.iter().for_each(|item| all_items.push(*item));
-
-        file_system_items.iter()
-            .filter(|file_system_item| Self::does_item_belong_to_db_items(&db_items, file_system_item))
-            .for_each(|file_system_item| all_items.push(*file_system_item));
-
-        all_items
+        db_items.into_iter().chain(file_system_items_which_are_not_in_database).collect()
     }
 
     fn does_item_belong_to_db_items(database_items: &Vec<LibraryRawItem>, file_system_item: &LibraryRawItem) -> bool {
@@ -90,11 +87,15 @@ impl VideoPort for VideoAdapter {
         todo!()
     }
 
-    fn save(&self, library_item: LibraryItem) -> Result<(), VideoError> {
+    fn save(&self, library_item: &LibraryItem) -> Result<(), VideoError> {
         todo!()
     }
 
+    fn save_all(&self, library_items: &Vec<LibraryItem>) -> Result<(), VideoError> {
+        Ok(())
+    }
+
     fn clone_box(&self) -> Box<dyn VideoPort> {
-        todo!()
+        Box::new(self.clone())
     }
 }