Future based scheduling

src/app.rs

@@ -2,9 +2,9 @@ use std::mem;
 use std::pin::Pin;
 use std::task::{Context, Poll, Waker};
 use std::sync::{Arc, Mutex, MutexGuard};
+use std::borrow::BorrowMut;
 
 use futures::prelude::*;
-use futures::ready;
 use futures_signals::signal::{Mutable, Signal, MutableSignalCloned, MutableLockMut};
 
 use termion::event::Key;
@@ -45,6 +45,8 @@ pub struct Sute<'a, S> {
     cmds: CommandParser<'a>,
 
     drain: Arc<LogDrain<'a>>,
+
+    future: Option<Pin<Box<dyn Future<Output=()>>>>,
 }
 
 impl<'a, S: Unpin> Sute<'a, S> {
@@ -52,8 +54,9 @@ impl<'a, S: Unpin> Sute<'a, S> {
         let inputs = Inputs::new();
         let state = Mutable::new(SuteState::new());
         let cmds = CommandParser::new();
+        let future = None;
 
-        Self { state, signal, inputs, api, log, cmds, drain, }
+        Self { state, signal, inputs, api, log, cmds, drain, future }
     }
 
     fn run_cmd(&mut self, cmdline: String) {
@@ -62,6 +65,22 @@ impl<'a, S: Unpin> Sute<'a, S> {
             Ok(matches) => {
                 match matches.subcommand() {
                     Some(("quit", _)) => self.state.lock_mut().running = false,
+                    Some(("authenticate", m)) => {
+                        if let Some(mut api) = self.api.clone() {
+                            let log2 = self.log.clone();
+                            let f = api.authentication().then(move |mut auth| {
+                                auth.mechanisms().map(move |mechs| {
+                                    info!(log2, "Oh yeah about `authenticate` of yours:");
+                                    for mech in mechs {
+                                        info!(log2, "Mech: {}", mech);
+                                    }
+                                })
+                            });
+                            self.future.replace(Box::pin(f));
+                        } else {
+                            error!(self.log, "No connection, can't authenticate!");
+                        }
+                    }
                     Some((s, m)) => info!(self.log, "Got Command {} with params {:?}", s, m),
                     None => error!(self.log, "No command provided."),
                 }
@@ -124,6 +143,11 @@ impl <'a, S: Unpin + Signal<Item=(u16,u16)>> Future for Sute<'a, S> {
             return Poll::Ready(());
         }
 
+        if let Some(f) = self.future.take() {
+            pin_mut!(f);
+            f.poll(cx);
+        }
+
         if let Poll::Ready(Some(size)) = Pin::new(&mut self.signal).poll_change(cx) {
             self.handle_resize(size);
         }

src/commands.rs

@@ -1,6 +1,7 @@
 use clap::{
     App,
     AppSettings,
+    Arg,
     ArgMatches,
     Error,
 };
@@ -24,13 +25,17 @@ impl<'help> CommandParser<'help> {
                 .subcommand(App::new("quit"))
                 .subcommand(App::new("connect"))
                 .subcommand(App::new("authenticate")
+                    .arg(Arg::new("user")
+                        .takes_value(true))
+                    .arg(Arg::new("password")
+                        .takes_value(true))
                 )
                 ,
         }
     }
 
     pub fn parse<I: IntoIterator<Item = String>>(&mut self, iter: I) -> Result<ArgMatches, Error> {
-        self.app.try_get_matches_from_mut(iter)
+        self.app.clone().try_get_matches_from(iter)
     }
 }
 

src/main.rs

@@ -1,6 +1,9 @@
 #[macro_use]
 extern crate slog;
 
+#[macro_use]
+extern crate futures;
+
 use std::io;
 use std::sync::{Arc, Mutex};
 use std::thread;

src/schema/api.rs

@@ -1,10 +1,13 @@
 use std::fmt;
+use std::future::Future;
+use futures::FutureExt;
 
 use slog::Logger;
 
 use super::connection_capnp::bootstrap::Client;
 use super::Authentication;
 
+#[derive(Clone)]
 pub struct API {
     inner: Client,
     log: Logger,
@@ -15,13 +18,15 @@ impl API {
         Self { log, inner}
     }
 
-    pub async fn authentication(&mut self) -> Authentication {
+    pub fn authentication(&mut self) -> impl Future<Output=Authentication> {
         let req = self.inner.auth_request().send().promise;
         // TODO: When's that an Err?
-        let res = req.await.unwrap();
+        req.map(|res| {
             // TODO: When's that an Err?
-        let tmp = res.get().unwrap();
-        Authentication::new(tmp.get_auth().unwrap())
+            let tmp = res.unwrap();
+            let moretmp = tmp.get().unwrap();
+            Authentication::new(moretmp.get_auth().unwrap())
+        })
     }
 
     ///// Authenticate to the server. Returns true on success, false on error

src/schema/authentication.rs

@@ -1,5 +1,8 @@
 use std::fmt;
 use std::any::Any;
+use std::future::Future;
+
+use futures::FutureExt;
 
 use slog::Logger;
 use super::auth_capnp::authentication::Client;
@@ -20,10 +23,12 @@ impl Authentication {
         Self { inner }
     }
 
-    pub async fn mechanisms(&mut self) -> Vec<String> {
+    pub fn mechanisms(&mut self) -> impl Future<Output=Vec<String>> {
         let req = self.inner.mechanisms_request().send().promise;
-        let res = req.await.unwrap();
+        req.map(|res| {
+            let res = res.unwrap();
             let tmp = res.get().unwrap();
             tmp.get_mechs().unwrap().iter().map(|x| x.unwrap().to_string()).collect()
+        })
     }
 }