feat(ecs): add queueing up spawning entities from systems

1 files changed, 18 insertions, 0 deletions

diff --git a/ecs/src/lib.rs b/ecs/src/lib.rs
index 0c06472..6b9373c 100644
--- a/ecs/src/lib.rs
+++ b/ecs/src/lib.rs
@@ -6,6 +6,7 @@ use std::fmt::Debug;
 use std::marker::PhantomData;
 use std::slice::{Iter as SliceIter, IterMut as SliceIterMut};
 
+use crate::actions::Action;
 use crate::component::{Component, Sequence as ComponentSequence};
 use crate::event::{Event, Id as EventId};
 use crate::system::{
@@ -16,6 +17,7 @@ use crate::system::{
 };
 use crate::tuple::FilterExclude as TupleFilterExclude;
 
+pub mod actions;
 pub mod component;
 pub mod event;
 pub mod system;
@@ -94,6 +96,21 @@ impl World
     {
         Query::new(&mut self.data)
     }
+
+    /// Peforms the actions that have been queued up using [`Actions`].
+    pub fn perform_queued_actions(&mut self)
+    {
+        for action in self.data.action_queue.drain(..) {
+            match action {
+                Action::Spawn(components) => {
+                    self.data
+                        .component_storage
+                        .entities
+                        .push(Entity { components });
+                }
+            }
+        }
+    }
 }
 
 #[derive(Debug, Default)]
@@ -101,6 +118,7 @@ pub struct WorldData
 {
     events: HashMap<EventId, Vec<usize>>,
     component_storage: ComponentStorage,
+    action_queue: Vec<Action>,
 }
 
 #[derive(Debug)]