Write `get-file` and commands to get the list of blocks from another node

Description

This closes #1 (closed) by providing an API that allows to get a file with just its hash

Detailed list of changes

• add get_file, get_blocks_info_from and other things related to managing the filesystem
• add new commands to nu API
• remove DragoonBehaviour as it was not useful
• add two new tests for get_file and change the already existing test to use the new API

Note

The get_file is still very rough, the error management needs to be handled better to take into a lot more cases of failure

src/commands.rs

@@ -89,6 +89,10 @@ pub(crate) enum DragoonCommand {
     GetConnectedPeers {
         sender: Sender<Vec<PeerId>>,
     },
+    GetFile {
+        file_hash: String,
+        sender: Sender<String>,
+    },
     GetListeners {
         sender: Sender<Vec<Multiaddr>>,
     },
@@ -128,6 +132,7 @@ impl std::fmt::Display for DragoonCommand {
             DragoonCommand::EncodeFile { .. } => write!(f, "encode-file"),
             DragoonCommand::GetBlockFrom { .. } => write!(f, "get-block-from"),
             DragoonCommand::GetConnectedPeers { .. } => write!(f, "get-connected-peers"),
+            DragoonCommand::GetFile { .. } => write!(f, "get-file"),
             DragoonCommand::GetListeners { .. } => write!(f, "get-listener"),
             DragoonCommand::GetPeerId { .. } => write!(f, "get-peer-id"),
             DragoonCommand::GetNetworkInfo { .. } => write!(f, "get-network-info"),
@@ -271,6 +276,14 @@ pub(crate) async fn create_cmd_get_connected_peers(State(state): State<Arc<AppSt
     dragoon_command!(state, GetConnectedPeers)
 }
 
+pub(crate) async fn create_cmd_get_file(
+    Path(file_hash): Path<String>,
+    State(state): State<Arc<AppState>>,
+) -> Response {
+    info!("running command get_file");
+    dragoon_command!(state, GetFile, file_hash)
+}
+
 pub(crate) async fn create_cmd_get_listeners(State(state): State<Arc<AppState>>) -> Response {
     info!("running command `get_listeners`");
     dragoon_command!(state, GetListeners)