rdest 0.1.0

rdest is simple BitTorrent client, currently supporting BEP3 specification.
Documentation 
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// Copyright 2020 Mateusz Janda.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// https://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or https://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.

use crate::constants::{HASH_SIZE, PEER_ID_SIZE};
use crate::messages::bitfield::Bitfield;
use crate::TrackerResp;
use std::collections::HashMap;
use tokio::sync::oneshot;

#[derive(Debug, Clone)]
pub enum TrackerCmd {
    TrackerResp(TrackerResp),
    Fail(String),
}

#[derive(Debug, Clone)]
pub enum ExtractorCmd {
    Done,
    Fail(String),
}

pub enum ViewCmd {
    Log(String),
    LogPeer {
        addr: String,
        peer_id: Option<[u8; PEER_ID_SIZE]>,
        text: String,
    },
    Kill,
}

#[derive(Debug, Clone)]
pub enum BroadCmd {
    SendHave {
        piece_index: usize,
    },
    SendOwnState {
        am_choked_map: HashMap<String, bool>,
    },
}
#[derive(Debug)]
pub enum PeerCmd {
    Init {
        addr: String,
        peer_id: [u8; PEER_ID_SIZE],
        resp_ch: oneshot::Sender<InitCmd>,
    },
    RecvChoke {
        addr: String,
    },
    RecvUnchoke {
        addr: String,
        resp_ch: oneshot::Sender<UnchokeCmd>,
    },
    RecvInterested {
        addr: String,
    },
    RecvNotInterested {
        addr: String,
        resp_ch: oneshot::Sender<NotInterestedCmd>,
    },
    RecvHave {
        addr: String,
        piece_index: usize,
        resp_ch: oneshot::Sender<HaveCmd>,
    },
    RecvBitfield {
        addr: String,
        bitfield: Bitfield,
        resp_ch: oneshot::Sender<BitfieldCmd>,
    },
    RecvRequest {
        addr: String,
        piece_index: usize,
        resp_ch: oneshot::Sender<RequestCmd>,
    },
    PieceDone {
        addr: String,
        resp_ch: oneshot::Sender<PieceCmd>,
    },
    PieceCancel {
        addr: String,
        resp_ch: oneshot::Sender<PieceCmd>,
    },
    SyncStats {
        addr: String,
        downloaded_rate: Option<u32>,
        uploaded_rate: Option<u32>,
        unexpected_blocks: usize,
    },
    KillReq {
        addr: String,
        reason: String,
    },
}

#[derive(Debug)]
pub struct ReqData {
    pub piece_index: usize,
    pub piece_length: usize,
    pub piece_hash: [u8; HASH_SIZE],
}

#[derive(Debug)]
pub enum InitCmd {
    SendBitfield { bitfield: Bitfield },
}

#[derive(Debug)]
pub enum UnchokeCmd {
    SendInterestedAndRequest(ReqData),
    SendRequest(ReqData),
    SendNotInterested,
    Ignore,
}

#[derive(Debug)]
pub enum NotInterestedCmd {
    PrepareKill,
    Ignore,
}

#[derive(Debug)]
pub enum HaveCmd {
    SendInterestedAndRequest(ReqData),
    SendInterested,
    Ignore,
}

#[derive(Debug)]
pub enum BitfieldCmd {
    SendState {
        with_am_unchoked: bool,
        am_interested: bool,
    },
}

#[derive(Debug)]
pub enum RequestCmd {
    LoadAndSendPiece {
        piece_index: usize,
        piece_hash: [u8; HASH_SIZE],
    },
    Ignore,
}

#[derive(Debug)]
pub enum PieceCmd {
    SendRequest(ReqData),
    SendNotInterested,
    PrepareKill,
    Ignore,
}