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

@@ -7,6 +7,7 @@ use libp2p::swarm::NetworkInfo;
 use libp2p::{Multiaddr, PeerId};
 use serde::{Deserialize, Serialize};
 use std::error::Error;
+use std::path::PathBuf;
 use std::sync::Arc;
 use tokio::sync::{
     mpsc,
@@ -90,6 +91,10 @@ pub(crate) enum DragoonCommand {
         powers_path: String,
         sender: Sender<(String, String)>,
     },
+    GetBlockDir {
+        file_hash: String,
+        sender: Sender<PathBuf>,
+    },
     GetBlockFrom {
         peer_id: PeerId,
         file_hash: String,
@@ -114,6 +119,10 @@ pub(crate) enum DragoonCommand {
         powers_path: String,
         sender: Sender<String>,
     },
+    GetFileDir {
+        file_hash: String,
+        sender: Sender<PathBuf>,
+    },
     GetListeners {
         sender: Sender<Vec<Multiaddr>>,
     },
@@ -151,11 +160,13 @@ impl std::fmt::Display for DragoonCommand {
             // DragoonCommand::DragoonPeers { .. } => write!(f, "dragoon-peers"),
             // DragoonCommand::DragoonSend { .. } => write!(f, "dragoon-send"),
             DragoonCommand::EncodeFile { .. } => write!(f, "encode-file"),
+            DragoonCommand::GetBlockDir { .. } => write!(f, "get-block-dir"),
             DragoonCommand::GetBlockFrom { .. } => write!(f, "get-block-from"),
             DragoonCommand::GetBlocksInfoFrom { .. } => write!(f, "get-blocks-info-from"),
             DragoonCommand::GetBlockList { .. } => write!(f, "get-block-list"),
             DragoonCommand::GetConnectedPeers { .. } => write!(f, "get-connected-peers"),
             DragoonCommand::GetFile { .. } => write!(f, "get-file"),
+            DragoonCommand::GetFileDir { .. } => write!(f, "get-file-dir"),
             DragoonCommand::GetListeners { .. } => write!(f, "get-listener"),
             DragoonCommand::GetPeerId { .. } => write!(f, "get-peer-id"),
             DragoonCommand::GetNetworkInfo { .. } => write!(f, "get-network-info"),