From 4c9d15356b195c0d51bfdea7d24dc4a5cd000263 Mon Sep 17 00:00:00 2001
From: HampusM <hampus@hampusmat.com>
Date: Sat, 16 Mar 2024 13:52:31 +0100
Subject: feat(ecs): make perform_queued_actions take non mut self reference

---
 ecs/src/lib.rs | 50 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 33 insertions(+), 17 deletions(-)

diff --git a/ecs/src/lib.rs b/ecs/src/lib.rs
index d781b3e..18e7381 100644
--- a/ecs/src/lib.rs
+++ b/ecs/src/lib.rs
@@ -1,7 +1,7 @@
 #![deny(clippy::all, clippy::pedantic)]
 
 use std::any::{Any, TypeId};
-use std::cell::RefCell;
+use std::cell::{Ref, RefCell};
 use std::collections::{HashMap, HashSet};
 use std::fmt::Debug;
 use std::marker::PhantomData;
@@ -51,13 +51,17 @@ impl World
     where
         Comps: ComponentSequence,
     {
-        self.data.component_storage.entities.push(Entity {
-            components: components
-                .into_vec()
-                .into_iter()
-                .map(RefCell::new)
-                .collect(),
-        });
+        self.data
+            .component_storage
+            .borrow_mut()
+            .entities
+            .push(Entity {
+                components: components
+                    .into_vec()
+                    .into_iter()
+                    .map(RefCell::new)
+                    .collect(),
+            });
     }
 
     pub fn register_system<'this, SystemImpl>(
@@ -104,14 +108,21 @@ impl World
     }
 
     /// Peforms the actions that have been queued up using [`Actions`].
-    pub fn perform_queued_actions(&mut self)
+    pub fn perform_queued_actions(&self)
     {
         for action in self.data.action_queue.borrow_mut().drain(..) {
             match action {
                 Action::Spawn(components) => {
-                    self.data.component_storage.entities.push(Entity {
-                        components: components.into_iter().map(RefCell::new).collect(),
-                    });
+                    self.data
+                        .component_storage
+                        .borrow_mut()
+                        .entities
+                        .push(Entity {
+                            components: components
+                                .into_iter()
+                                .map(RefCell::new)
+                                .collect(),
+                        });
                 }
             }
         }
@@ -122,7 +133,7 @@ impl World
 pub struct WorldData
 {
     events: HashMap<EventId, Vec<usize>>,
-    component_storage: ComponentStorage,
+    component_storage: RefCell<ComponentStorage>,
     action_queue: RefCell<Vec<Action>>,
 }
 
@@ -131,7 +142,7 @@ pub struct Query<'world, Comps>
 where
     Comps: ComponentSequence,
 {
-    world_data: &'world WorldData,
+    component_storage: Ref<'world, ComponentStorage>,
     comps_pd: PhantomData<Comps>,
 }
 
@@ -139,10 +150,12 @@ impl<'world, Comps> Query<'world, Comps>
 where
     Comps: ComponentSequence,
 {
-    pub fn iter(&self) -> QueryComponentIter<'world, Comps>
+    pub fn iter<'this>(&'this self) -> QueryComponentIter<'world, Comps>
+    where
+        'this: 'world,
     {
         QueryComponentIter {
-            entity_iter: self.world_data.component_storage.entities.iter(),
+            entity_iter: self.component_storage.entities.iter(),
             component_type_ids: Comps::type_ids(),
             comps_pd: PhantomData,
         }
@@ -150,7 +163,10 @@ where
 
     fn new(world_data: &'world WorldData) -> Self
     {
-        Self { world_data, comps_pd: PhantomData }
+        Self {
+            component_storage: world_data.component_storage.borrow(),
+            comps_pd: PhantomData,
+        }
     }
 }
 
-- 
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