Implement the service to list items in the root folder.

backend/infrastructure/src/video/adapter.rs

@@ -0,0 +1,55 @@
+use lumiere_domain::video::error::VideoError;
+use lumiere_domain::video::model::library_item::{LibraryItem, ReadLibraryItem};
+use lumiere_domain::video::model::video::Video;
+use lumiere_domain::video::port::VideoPort;
+use uuid::Uuid;
+
+pub struct VideoAdapter {
+
+}
+
+impl VideoAdapter {
+    pub fn new() -> Self {
+        Self {}
+    }
+
+    pub fn get_root_folder_read_library_items(&self) -> Result<Vec<ReadLibraryItem>, VideoError> {
+        // get the root_folder path from the environment variable named "ROOT_FOLDER"
+        // list all elements inside this folder on the file system
+        // map all those elements into ReadLibraryItem objects
+        // return the list
+        todo!()
+    }
+
+    pub fn get_all_library_items_from_db(&self) -> Result<Vec<ReadLibraryItem>, VideoError> {
+        todo!()
+    }
+}
+
+impl VideoPort for VideoAdapter {
+    fn list_root_folder(&self) -> Result<Vec<ReadLibraryItem>, VideoError> {
+        // In parallel:
+        //  - call method "get_root_folder_read_library_items()"
+        //  - call method "get_all_library_items_from_db()"
+        //
+        // then, merge the two lists. If an item from the "get_root_folder_read_library_items()" result has the same id as an item from the "get_all_library_items_from_db()" results, merge those two items in one single.
+        // return the merged list
+        todo!()
+    }
+
+    fn list_folder(&self, folder_id: Uuid) -> Result<Vec<ReadLibraryItem>, VideoError> {
+        todo!()
+    }
+
+    fn get_video_stream(&self, video_id: Uuid) -> Result<Video, VideoError> {
+        todo!()
+    }
+
+    fn save(&self, library_item: LibraryItem) -> Result<(), VideoError> {
+        todo!()
+    }
+
+    fn clone_box(&self) -> Box<dyn VideoPort> {
+        todo!()
+    }
+}

backend/infrastructure/src/video/mod.rs

@@ -1,2 +1,3 @@
+pub mod adapter;
 pub mod model;
 pub mod video_format_detector;

backend/infrastructure/src/video/video_format_detector.rs

@@ -1,7 +1,7 @@
 use std::fs::File;
 use std::path::Path;
-use lumiere_domain::video::library_item::VideoFormat;
-use lumiere_domain::video::library_item::VideoFormat::{AVI, MKV, MP4, UNKNOWN, WEBM};
+use lumiere_domain::video::model::video::VideoFormat;
+use lumiere_domain::video::model::video::VideoFormat::{AVI, MKV, MP4, UNKNOWN, WEBM};
 
 /// Determine Content-Type by reading file headers (magic numbers)
 pub fn get_content_type(path: &Path) -> VideoFormat {