Add unsubscribe command to client

examples/discord_presence/src/main.rs

@@ -36,5 +36,8 @@ fn main() {
     drpc.subscribe(Event::ActivityJoinRequest, |s| s)
         .expect("Failed to subscribe to event");
 
+    drpc.unsubscribe(Event::ActivityJoinRequest, |j| j)
+        .expect("Failed to unsubscribe from event");
+
     loop { thread::sleep(time::Duration::from_secs(10)) };
 }

src/client.rs

@@ -64,6 +64,12 @@ impl<T> Client<T>
         self.execute(Command::Subscribe, f(SubscriptionArgs::new()), Some(evt))
     }
 
+    pub fn unsubscribe<F>(&mut self, evt: Event, f: F) -> Result<Payload<Subscription>>
+        where F: FnOnce(SubscriptionArgs) -> SubscriptionArgs
+    {
+        self.execute(Command::Unsubscribe, f(SubscriptionArgs::new()), Some(evt))
+    }
+
 // private
 
     fn handshake(&mut self) -> Result<()> {