feat: command handling, make initializing VCs concurrent

src/command/mod.rs

@@ -1,6 +1,7 @@
 use std::{
     ffi::{CStr, CString},
     fmt::Debug,
+    sync::Arc,
 };
 
 use blart::TreeMap;
@@ -9,12 +10,16 @@ use twilight_model::application::{
     command::Command, interaction::application_command::CommandData,
 };
 
+use crate::VCs;
+
 mod join;
 mod leave;
 mod opt_out;
 
 #[derive(Debug, Clone)]
-pub struct State {}
+pub struct State {
+    pub vcs: Arc<VCs>,
+}
 
 type Return = ();
 type BoxedHandler = Box<dyn Fn(State, CommandData) -> BoxFuture<'static, Return>>;
@@ -53,7 +58,7 @@ impl Router {
         self.map.insert(name.parse().unwrap(), boxed_handler);
     }
 
-    pub async fn handle(&self, args: State, command_data: CommandData) -> Return {
+    pub async fn handle(&self, state: State, command_data: CommandData) -> Return {
         let name = &command_data.name;
         let key = CStr::from_bytes_with_nul(name.as_bytes()).unwrap();
 
@@ -62,19 +67,27 @@ impl Router {
             .get(key)
             .expect("asked to handle an inexistent command");
 
-        handler(args, command_data).await
+        handler(state, command_data).await
     }
 }
 
-impl<'a> FromIterator<(&'a CommandData, BoxedHandler)> for Router {
-    fn from_iter<T: IntoIterator<Item = (&'a CommandData, BoxedHandler)>>(iter: T) -> Self {
-        let mut router = Router::default();
+impl<'a> FromIterator<(&'a Command, BoxedHandler)> for Router {
+    #[inline]
+    fn from_iter<T: IntoIterator<Item = (&'a Command, BoxedHandler)>>(iter: T) -> Self {
+        let mut this = Self::default();
 
-        for (command, handler) in iter {
+        this.extend(iter);
+
+        this
+    }
+}
+
+impl<'a> Extend<(&'a Command, BoxedHandler)> for Router {
+    #[inline]
+    fn extend<T: IntoIterator<Item = (&'a Command, BoxedHandler)>>(&mut self, iter: T) {
+        for (command, boxed_handler) in iter {
             let name = &command.name;
-            router.add_route(name, handler);
+            self.add_route_already_boxed(name, boxed_handler);
         }
-
-        router
     }
 }