1#![feature(try_from)]
 2
 3extern crate futures;
 4extern crate tokio_core;
 5extern crate tokio_xmpp;
 6extern crate jid;
 7extern crate minidom;
 8extern crate xmpp_parsers;
 9
10use std::env::args;
11use std::process::exit;
12use std::convert::TryFrom;
13use tokio_core::reactor::Core;
14use futures::{Future, Stream, Sink, future};
15use tokio_xmpp::Client;
16use minidom::Element;
17use xmpp_parsers::presence::{Presence, Type as PresenceType, Show as PresenceShow};
18use xmpp_parsers::message::{Message, MessageType};
19use jid::Jid;
20
21fn main() {
22    let args: Vec<String> = args().collect();
23    if args.len() != 3 {
24        println!("Usage: {} <jid> <password>", args[0]);
25        exit(1);
26    }
27    let jid = &args[1];
28    let password = &args[2];
29
30    // tokio_core context
31    let mut core = Core::new().unwrap();
32    // Client instance
33    let client = Client::new(jid, password, core.handle()).unwrap();
34
35    // Make the two interfaces for sending and receiving independent
36    // of each other so we can move one into a closure.
37    let (sink, stream) = client.split();
38    // Wrap sink in Option so that we can take() it for the send(self)
39    // to consume and return it back when ready.
40    let mut sink = Some(sink);
41    let mut send = move |stanza| {
42        sink = Some(
43            sink.take().
44                expect("sink")
45                .send(stanza)
46                .wait()
47                .expect("sink.send")
48        );
49    };
50    // Main loop, processes events
51    let done = stream.for_each(|event| {
52        if event.is_online() {
53            println!("Online!");
54
55            let presence = make_presence();
56            send(presence);
57        } else if let Some(message) = event.into_stanza()
58            .and_then(|stanza| Message::try_from(stanza).ok())
59        {
60            // This is a message we'll echo
61            match (message.from, message.bodies.get("")) {
62                (Some(from), Some(body)) =>
63                    if message.type_ != MessageType::Error {
64                        let reply = make_reply(from, body);
65                        send(reply);
66                    },
67                _ => (),
68            }
69        }
70
71        Box::new(future::ok(()))
72    });
73
74    // Start polling `done`
75    match core.run(done) {
76        Ok(_) => (),
77        Err(e) => {
78            println!("Fatal: {}", e);
79            ()
80        }
81    }
82}
83
84// Construct a <presence/>
85fn make_presence() -> Element {
86    let mut presence = Presence::new(PresenceType::None);
87    presence.show = PresenceShow::Chat;
88    presence.statuses.insert(String::from("en"), String::from("Echoing messages."));
89    presence.into()
90}
91
92// Construct a chat <message/>
93fn make_reply(to: Jid, body: &str) -> Element {
94    let mut message = Message::new(Some(to));
95    message.bodies.insert(String::new(), body.to_owned());
96    message.into()
97}