Rename EventReturnHandler to EventYieldHandler, make generic

This also makes EventScene generic for use in the future.

resources/opcodes.json

@@ -308,10 +308,15 @@
             "size": 16
         },
         {
-            "name": "EventHandlerReturn",
+            "name": "EventYieldHandler",
             "opcode": 840,
             "size": 16
         },
+        {
+            "name": "EventYieldHandler8",
+            "opcode": 441,
+            "size": 40
+        },
         {
             "name": "Config",
             "opcode": 534,

src/bin/kawari-world.rs

@@ -838,14 +838,23 @@ async fn client_loop(
                                                     connection.send_message(&*format!("Event {event_id} tried to start, but it doesn't have a script associated with it!")).await;
                                                 }
                                             }
-                                            ClientZoneIpcData::EventHandlerReturn { handler_id, scene, error_code, num_results, params } => {
-                                                tracing::info!("Finishing this event... {handler_id} {error_code} {scene} {:?}", &params[..*num_results as usize]);
+                                            ClientZoneIpcData::EventYieldHandler(handler) => {
+                                                tracing::info!("Finishing this event... {} {} {} {:?}", handler.handler_id, handler.error_code, handler.scene, &handler.params[..handler.num_results as usize]);
 
                                                 connection
                                                 .event
                                                     .as_mut()
                                                     .unwrap()
-                                                .finish(*scene, &params[..*num_results as usize], &mut lua_player);
+                                                    .finish(handler.scene, &handler.params[..handler.num_results as usize], &mut lua_player);
+                                            }
+                                            ClientZoneIpcData::EventYieldHandler8(handler) => {
+                                                tracing::info!("Finishing this event... {} {} {} {:?}", handler.handler_id, handler.error_code, handler.scene, &handler.params[..handler.num_results as usize]);
+
+                                                connection
+                                                    .event
+                                                    .as_mut()
+                                                    .unwrap()
+                                                    .finish(handler.scene, &handler.params[..handler.num_results as usize], &mut lua_player);
                                             }
                                             ClientZoneIpcData::Config(config) => {
                                                 connection

src/ipc/zone/event_scene.rs

@@ -4,8 +4,8 @@ use crate::common::ObjectTypeId;
 
 #[binrw]
 #[brw(little)]
-#[derive(Debug, Clone, Default)]
-pub struct EventScene {
+#[derive(Debug, Clone)]
+pub struct EventScene<const MAX_PARAMS: usize> {
     pub actor_id: ObjectTypeId,
     pub event_id: u32,
     pub scene: u16,
@@ -15,7 +15,21 @@ pub struct EventScene {
     pub params_count: u8,
     // Extra padding seems needed after or the client will seemingly softlock even with 2 params, possibly used for alignment?
     #[brw(pad_before = 3, pad_after = 4)]
-    pub params: [u32; 2],
+    pub params: [u32; MAX_PARAMS],
+}
+
+impl<const MAX_PARAMS: usize> Default for EventScene<{ MAX_PARAMS }> {
+    fn default() -> Self {
+        Self {
+            actor_id: ObjectTypeId::default(),
+            event_id: 0,
+            scene: 0,
+            scene_flags: 0,
+            unk1: 0,
+            params_count: 0,
+            params: [0u32; MAX_PARAMS],
+        }
+    }
 }
 
 #[cfg(test)]
@@ -36,7 +50,7 @@ mod tests {
         let buffer = read(d).unwrap();
         let mut buffer = Cursor::new(&buffer);
 
-        let event_play = EventScene::read_le(&mut buffer).unwrap();
+        let event_play = EventScene::<2>::read_le(&mut buffer).unwrap();
         assert_eq!(
             event_play.actor_id,
             ObjectTypeId {

src/ipc/zone/event_yield_handler.rs

@@ -0,0 +1,24 @@
+use binrw::binrw;
+
+#[binrw]
+#[brw(little)]
+#[derive(Debug, Clone)]
+pub struct EventYieldHandler<const MAX_PARAMS: usize> {
+    pub handler_id: u32,
+    pub scene: u16,
+    pub error_code: u8,
+    pub num_results: u8,
+    pub params: [i32; MAX_PARAMS],
+}
+
+impl<const MAX_PARAMS: usize> Default for EventYieldHandler<{ MAX_PARAMS }> {
+    fn default() -> Self {
+        Self {
+            handler_id: 0,
+            scene: 0,
+            error_code: 0,
+            num_results: 0,
+            params: [0i32; MAX_PARAMS],
+        }
+    }
+}

src/ipc/zone/mod.rs

@@ -85,6 +85,9 @@ pub use currency_info::CurrencyInfo;
 mod config;
 pub use config::Config;
 
+mod event_yield_handler;
+pub use event_yield_handler::EventYieldHandler;
+
 use crate::common::ObjectTypeId;
 use crate::common::Position;
 use crate::common::read_string;
@@ -241,7 +244,7 @@ pub enum ServerZoneIpcData {
     ContainerInfo(ContainerInfo),
     /// Sent to tell the client to play a scene
     #[br(pre_assert(*magic == ServerZoneIpcType::EventScene))]
-    EventScene(EventScene),
+    EventScene(EventScene<2>),
     /// Sent to tell the client to load a scene, but not play it
     #[br(pre_assert(*magic == ServerZoneIpcType::EventStart))]
     EventStart(EventStart),
@@ -438,15 +441,10 @@ pub enum ClientZoneIpcData {
         #[brw(pad_after = 4)] // padding
         event_id: u32,
     },
-    #[br(pre_assert(*magic == ClientZoneIpcType::EventHandlerReturn))]
-    EventHandlerReturn {
-        // TODO: This is actually EventYieldHandler
-        handler_id: u32,
-        scene: u16,
-        error_code: u8,
-        num_results: u8,
-        params: [i32; 2],
-    },
+    #[br(pre_assert(*magic == ClientZoneIpcType::EventYieldHandler))]
+    EventYieldHandler(EventYieldHandler<2>),
+    #[br(pre_assert(*magic == ClientZoneIpcType::EventYieldHandler8))]
+    EventYieldHandler8(EventYieldHandler<8>),
     #[br(pre_assert(*magic == ClientZoneIpcType::Config))]
     Config(Config),
     #[br(pre_assert(*magic == ClientZoneIpcType::EventUnkRequest))]
@@ -475,7 +473,7 @@ mod tests {
 
     /// Ensure that the IPC data size as reported matches up with what we write
     #[test]
-    fn world_ipc_sizes() {
+    fn server_zone_ipc_sizes() {
         let ipc_types = [
             (
                 ServerZoneIpcType::InitResponse,
@@ -605,4 +603,36 @@ mod tests {
             );
         }
     }
+
+    /// Ensure that the IPC data size as reported matches up with what we write
+    #[test]
+    fn client_zone_ipc_sizes() {
+        let ipc_types = [(
+            ClientZoneIpcType::EventYieldHandler8,
+            ClientZoneIpcData::EventYieldHandler8(EventYieldHandler::<8>::default()),
+        )];
+
+        for (opcode, data) in &ipc_types {
+            let mut cursor = Cursor::new(Vec::new());
+
+            let ipc_segment = ClientZoneIpcSegment {
+                unk1: 0,
+                unk2: 0,
+                op_code: opcode.clone(), // doesn't matter for this test
+                option: 0,
+                timestamp: 0,
+                data: data.clone(),
+            };
+            ipc_segment.write_le(&mut cursor).unwrap();
+
+            let buffer = cursor.into_inner();
+
+            assert_eq!(
+                buffer.len(),
+                ipc_segment.calc_size() as usize,
+                "{:#?} did not match size!",
+                opcode
+            );
+        }
+    }
 }