chore: lay out the ground work for a Discord command router

Cargo.lock

@@ -461,6 +461,16 @@ dependencies = [
  "wyz",
 ]
 
+[[package]]
+name = "blart"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "220e5685b0a23b634e9215a69cfa9800e103ccd2f0134bd1a81cc9c584059701"
+dependencies = [
+ "bytemuck",
+ "paste",
+]
+
 [[package]]
 name = "block-buffer"
 version = "0.10.4"
@@ -1309,7 +1319,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "39cab71617ae0d63f51a36d69f866391735b51691dbda63cf6f96d042b63efeb"
 dependencies = [
  "libc",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -1443,7 +1453,9 @@ checksum = "d9c4f5dac5e15c24eb999c26181a6ca40b39fe946cbe4c263c7209467bc83af2"
 name = "fomo-reducer"
 version = "0.1.0"
 dependencies = [
+ "blart",
  "clap",
+ "futures",
  "opendal",
  "rhai",
  "rustls 0.23.35",
@@ -1502,9 +1514,9 @@ checksum = "e6d5a32815ae3f33302d95fdcb2ce17862f8c65363dcfd29360480ba1001fc9c"
 
 [[package]]
 name = "futures"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "65bc07b1a8bc7c85c5f2e110c476c7389b4554ba72af57d8445ea63a576b0876"
+checksum = "8b147ee9d1f6d097cef9ce628cd2ee62288d963e16fb287bd9286455b241382d"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1517,9 +1529,9 @@ dependencies = [
 
 [[package]]
 name = "futures-channel"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dff15bf788c671c1934e366d07e30c1814a8ef514e1af724a602e8a2fbe1b10"
+checksum = "07bbe89c50d7a535e539b8c17bc0b49bdb77747034daa8087407d655f3f7cc1d"
 dependencies = [
  "futures-core",
  "futures-sink",
@@ -1527,15 +1539,15 @@ dependencies = [
 
 [[package]]
 name = "futures-core"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "05f29059c0c2090612e8d742178b0580d2dc940c837851ad723096f87af6663e"
+checksum = "7e3450815272ef58cec6d564423f6e755e25379b217b0bc688e295ba24df6b1d"
 
 [[package]]
 name = "futures-executor"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1e28d1d997f585e54aebc3f97d39e72338912123a67330d723fdbb564d646c9f"
+checksum = "baf29c38818342a3b26b5b923639e7b1f4a61fc5e76102d4b1981c6dc7a7579d"
 dependencies = [
  "futures-core",
  "futures-task",
@@ -1555,9 +1567,9 @@ dependencies = [
 
 [[package]]
 name = "futures-io"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9e5c1b78ca4aae1ac06c48a526a655760685149f0d465d21f37abfe57ce075c6"
+checksum = "cecba35d7ad927e23624b22ad55235f2239cfa44fd10428eecbeba6d6a717718"
 
 [[package]]
 name = "futures-lite"
@@ -1574,9 +1586,9 @@ dependencies = [
 
 [[package]]
 name = "futures-macro"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "162ee34ebcb7c64a8abebc059ce0fee27c2262618d7b60ed8faf72fef13c3650"
+checksum = "e835b70203e41293343137df5c0664546da5745f82ec9b84d40be8336958447b"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -1596,21 +1608,21 @@ dependencies = [
 
 [[package]]
 name = "futures-sink"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e575fab7d1e0dcb8d0c7bcf9a63ee213816ab51902e6d244a95819acacf1d4f7"
+checksum = "c39754e157331b013978ec91992bde1ac089843443c49cbc7f46150b0fad0893"
 
 [[package]]
 name = "futures-task"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f90f7dce0722e95104fcb095585910c0977252f286e354b5e3bd38902cd99988"
+checksum = "037711b3d59c33004d3856fbdc83b99d4ff37a24768fa1be9ce3538a1cde4393"
 
 [[package]]
 name = "futures-util"
-version = "0.3.31"
+version = "0.3.32"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9fa08315bb612088cc391249efdc3bc77536f16c91f6cf495e6fbe85b20a4a81"
+checksum = "389ca41296e6190b48053de0321d02a77f32f8a5d2461dd38762c0593805c6d6"
 dependencies = [
  "futures-channel",
  "futures-core",
@@ -1620,7 +1632,6 @@ dependencies = [
  "futures-task",
  "memchr",
  "pin-project-lite",
- "pin-utils",
  "slab",
 ]
 
@@ -3587,6 +3598,12 @@ dependencies = [
  "windows-link",
 ]
 
+[[package]]
+name = "paste"
+version = "1.0.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57c0d7b74b563b49d38dae00a0c37d4d6de9b432382b2892f0574ddcae73fd0a"
+
 [[package]]
 name = "patricia_tree"
 version = "0.8.0"
@@ -4553,7 +4570,7 @@ dependencies = [
  "errno",
  "libc",
  "linux-raw-sys",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -5647,7 +5664,7 @@ dependencies = [
  "getrandom 0.3.4",
  "once_cell",
  "rustix",
- "windows-sys 0.52.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]
@@ -6693,7 +6710,7 @@ version = "0.1.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c2a7b1c03c876122aa43f3020e6c3c3ee5c05081c9a00739faf7503aeba10d22"
 dependencies = [
- "windows-sys 0.48.0",
+ "windows-sys 0.61.2",
 ]
 
 [[package]]

Cargo.toml

@@ -4,7 +4,9 @@ version = "0.1.0"
 edition = "2024"
 
 [dependencies]
+blart = "0.4.0"
 clap = { version = "4.5.40", features = ["derive", "env"] }
+futures = "0.3.32"
 opendal = { git = "https://github.com/apache/opendal", features = [
     "services-azfile",
     "services-aliyun-drive",

src/command/mod.rs

@@ -0,0 +1,72 @@
+use std::{
+    ffi::{CStr, CString},
+    fmt::Debug,
+};
+
+use blart::TreeMap;
+use futures::future::BoxFuture;
+use twilight_model::application::{
+    command::Command, interaction::application_command::CommandData,
+};
+
+#[derive(Debug, Clone)]
+pub struct State {}
+
+type Return = ();
+type BoxedHandler = Box<dyn Fn(State, CommandData) -> BoxFuture<'static, Return>>;
+
+fn box_handler<Handler, Fut>(handler: Handler) -> BoxedHandler
+where
+    Fut: Future<Output = Return> + Send + 'static,
+    Handler: Fn(State, CommandData) -> Fut + 'static,
+{
+    Box::new(move |state, command_data| Box::pin(handler(state, command_data)))
+}
+
+pub fn all() -> Vec<(&'static Command, BoxedHandler)> {
+    vec![]
+}
+
+#[derive(Default)]
+pub struct Router {
+    map: TreeMap<CString, BoxedHandler>,
+}
+
+impl Router {
+    fn add_route<'s, 'a, Fut, Handler>(&'s mut self, name: &'a str, handler: Handler)
+    where
+        Fut: Future<Output = Return> + Send + 'static,
+        Handler: Fn(State, CommandData) -> Fut + 'static,
+    {
+        self.add_route_already_boxed(name, box_handler(handler));
+    }
+
+    fn add_route_already_boxed<'s, 'a>(&'s mut self, name: &'a str, boxed_handler: BoxedHandler) {
+        self.map.insert(name.parse().unwrap(), boxed_handler);
+    }
+
+    pub async fn handle(&self, args: State, command_data: CommandData) -> Return {
+        let name = &command_data.name;
+        let key = CStr::from_bytes_with_nul(name.as_bytes()).unwrap();
+
+        let handler = self
+            .map
+            .get(key)
+            .expect("asked to handle an inexistent command");
+
+        handler(args, 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();
+
+        for (command, handler) in iter {
+            let name = &command.name;
+            router.add_route(name, handler);
+        }
+
+        router
+    }
+}

src/lib.rs

@@ -1,3 +1,4 @@
+mod command;
 mod one_to_many;
 mod one_to_many_with_data;
 mod one_to_one;