add scene management (create/delete)

src/api/mod.rs

@@ -53,6 +53,9 @@ pub enum Request {
     CreateScene {
         title: String,
     },
+    DeleteScene {
+        scene: usize,
+    },
     SetSceneGrid {
         scene: usize,
         grid_cell_size: f32,

src/game/mod.rs

@@ -189,6 +189,10 @@ impl<'a, C: Character<A> + Serialize + Deserialize<'a>, A: entry::GameEntry + Se
             },
         );
     }
+    /// Deletes a scene and returns true if the scene existed
+    pub fn delete_scene(&mut self, scene: usize) -> Option<Scene> {
+        self.scenes.remove(&scene)
+    }
 
     pub fn scene_visible(&mut self, scene: usize, visible: bool) {
         if let Some(scene) = self.scenes.get_mut(&scene) {

src/lib.rs

@@ -193,6 +193,18 @@ impl GameServer {
                         _ = broadcast.send((SendTo::User(id), scenes));
                     }
                 }
+                api::Request::DeleteScene { scene } => {
+                    if self.is_admin(&id) {
+                        if let Some(scene) = self.game.delete_scene(scene) {
+                            if scene.visible_to_users {
+                                // Only update the players if they knew the scene existed
+                                _ = broadcast.send((SendTo::AllBut(id.clone()), self.get_scene_list(false)));
+                            }
+                            // but always update the admin
+                            _ = broadcast.send((SendTo::User(id), self.get_scene_list(true)));
+                        }
+                    }
+                }
                 api::Request::SetSceneGrid {
                     grid_cell_size,
                     grid_offset,