cnsprcy 0.3.2

WIP
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145

use std::fmt;

use crate::peer::Address;
use crate::message;

/*
 *
 *	CHANNEL TYPES
 *
 */

pub use tokio::sync::mpsc as channel;
pub use channel::unbounded_channel as new_channel;

pub use tokio::sync::oneshot as oneshot;
pub use oneshot::channel as new_oneshot;

pub type Sender<T> = channel::UnboundedSender::<T>;
pub type Receiver<T> = channel::UnboundedReceiver::<T>;

pub type Replier<T> = oneshot::Sender<T>;
pub type ReplyReceiver<T> = oneshot::Receiver<T>;

pub struct ChannelPair<A, B> {
	tx: Sender::<A>,
	rx: Receiver::<B>
}

/*
 *
 *	MESSAGE TYPES
 *
 */

/// Node → Interface
pub type PktTo = (Address, message::Packet);
/// Interface → Node
pub type PktFrom = (Address, message::Packet);

pub trait Respond {
	type R;
	fn reply<IntoR: Into<Self::R>>(self, reply: IntoR);
}

impl<T: fmt::Debug> Respond for Replier<T> {
	type R = T;
	fn reply<IntoR: Into<Self::R>>(self, reply: IntoR) {
		match self.send(reply.into()) {
			Ok(_) => {},
			Err(reply) => error!(?reply, "failed to respond")
		}
	}
}

/*
 *	CONTROL CHANNEL TYPES
 */

impl <A, B> ChannelPair<A, B> {

	pub fn combine(tx: Sender<A>, rx: Receiver<B>) -> Self {
		Self {tx, rx}
	}

	pub fn duplex_pair() -> (ChannelPair<A, B>, ChannelPair<B, A>) {
		let (tx0, rx0) = new_channel::<A>();
		let (tx1, rx1) = new_channel::<B>();
		(
			ChannelPair::<A, B> {tx: tx0, rx: rx1},
			ChannelPair::<B, A> {tx: tx1, rx: rx0}
		)
	}

	pub fn split(self) -> (Sender<A>, Receiver<B>) {
		(self.tx, self.rx)
	}

}

//pub(crate) type NodeChannel = ChannelPair<PktTo, PktFrom>;
pub type ServerChannel = ChannelPair<PktFrom, PktTo>;

pub type Request<C, R> = (C, Replier<R>);
pub type GetRequest<R> = Request<(), R>;

pub trait Requester: Sized + Respond {
	type Content;
	type Reply;

	fn combine(content: Self::Content, replier: Replier<Self::Reply>) -> Self;

	fn make(content: Self::Content) -> (Self, ReplyReceiver<Self::Reply>) {
		let (replier, receiver) = new_oneshot();
		(Self::combine(content, replier), receiver)
	}
}


pub trait RequestSender {
	type S;

	fn send_request(&self, request: Self::S);

	fn request<R, W, IntoS>(&self, wrap: W, content: R::Content)
		-> ReplyReceiver<R::Reply>
		where W: Fn(R) -> IntoS,
			IntoS: Into<Self::S>,
			R: Requester
	{
		let (req, receiver) = R::make(content);
		self.send_request(wrap(req).into());
		receiver
	}
	fn get<R, W, IntoS>(&self, wrap: W) -> ReplyReceiver<R::Reply>
		where W: Fn(R) -> IntoS,
			IntoS: Into<Self::S>,
			R: Requester<Content = ()>,
	{
		let (req, receiver) = R::make(());
		self.send_request(wrap(req).into());
		receiver
	}
}

impl<S: fmt::Debug> RequestSender for Sender<S> {
	type S = S;
	fn send_request(&self, request: S) {
		self.send(request)
			.unwrap_or_else(|request| error!(?request, "failed to send"))
	}
}

impl<C, R: fmt::Debug> Requester for Request<C, R> {
	type Content = C;
	type Reply = R;
	fn combine(content: C, replier: Replier<R>) -> Self {
		(content, replier)
	}
}
impl<C, R: fmt::Debug> Respond for Request<C, R> {
	type R = R;
	fn reply<IntoR: Into<Self::R>>(self, reply: IntoR) {
		self.1.reply(reply)
	}
}