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echo_bot: document, simplify

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This commit is contained in:
Astro 2017-07-13 22:04:54 +02:00
parent e2c6a6ed37
commit 7e18db0717
1 changed files with 33 additions and 28 deletions
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61
examples/echo_bot.rs
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@ -9,10 +9,16 @@ use futures::{Future, Stream, Sink, future};
use tokio_xmpp::Client;
fn main() {
// Tokio_core context
let mut core = Core::new().unwrap();
// Client instance
let client = Client::new("astrobot@example.org", "", &core.handle()).unwrap();
// Make the two interfaces for sending and receiving independent
// of each other so we can move one into a closure.
let (sink, stream) = client.split();
// Wrap sink in Option so that we can take() it for the send(self)
// to consume and return it back when ready.
let mut sink = Some(sink);
let mut send = move |stanza| {
sink = Some(
@ -23,38 +29,35 @@ fn main() {
.expect("sink.send")
);
};
// Main loop, processes events
let done = stream.for_each(|event| {
let result: Box<Future<Item=(), Error=String>> =
if event.is_online() {
println!("Online!");
if event.is_online() {
println!("Online!");
let presence = make_presence();
send(presence);
Box::new(
future::ok(())
)
} else if let Some(stanza) = event.as_stanza() {
if stanza.name == "message" &&
stanza.get_attribute("type", None) != Some("error") {
let from = stanza.get_attribute("from", None);
let body = stanza.get_child("body", Some("jabber:client"))
.map(|el| el.content_str());
let presence = make_presence();
send(presence);
} else if let Some(stanza) = event.as_stanza() {
if stanza.name == "message" &&
stanza.get_attribute("type", None) != Some("error") {
// This is a message we'll echo
let from = stanza.get_attribute("from", None);
let body = stanza.get_child("body", Some("jabber:client"))
.map(|el| el.content_str());
match (from.as_ref(), body) {
(Some(from), Some(body)) => {
let reply = make_reply(from, body);
send(reply);
},
_ => (),
};
}
Box::new(future::ok(()))
} else {
Box::new(future::ok(()))
};
result
match (from.as_ref(), body) {
(Some(from), Some(body)) => {
let reply = make_reply(from, body);
send(reply);
},
_ => (),
};
}
}
Box::new(future::ok(()))
});
// Start polling `done`
match core.run(done) {
Ok(_) => (),
Err(e) => {
@ -64,6 +67,7 @@ fn main() {
}
}
// Construct a <presence/>
fn make_presence() -> xml::Element {
let mut presence = xml::Element::new("presence".to_owned(), None, vec![]);
presence.tag(xml::Element::new("status".to_owned(), None, vec![]))
@ -73,6 +77,7 @@ fn make_presence() -> xml::Element {
presence
}
// Construct a chat <message/>
fn make_reply(to: &str, body: String) -> xml::Element {
let mut message = xml::Element::new(
"message".to_owned(),