feat: component shorthand

packages/ecs/src/component.js

@@ -18,3 +18,14 @@ export default function ComponentRouter() {
   }
   return new RealClass(schema);
 }
+
+ComponentRouter.normalize = (ComponentLike) => {
+  if (ComponentLike.prototype instanceof ComponentRouter) {
+    return ComponentLike;
+  }
+  return class AdhocComponent extends ComponentRouter {
+
+    static schema = ComponentLike;
+
+  };
+};

packages/ecs/src/ecs.js

@@ -1,4 +1,5 @@
 /* eslint-disable guard-for-in, max-classes-per-file, no-continue, no-restricted-syntax */
+import Component from './component';
 
 export default class Ecs {
 
@@ -16,7 +17,7 @@ export default class Ecs {
 
   constructor(Components) {
     for (const i in Components) {
-      this.Components[i] = this.trackDirtyEntities(Components[i]);
+      this.Components[i] = this.trackDirtyEntities(Component.normalize(Components[i]));
     }
   }
 

packages/ecs/test/ecs.js

@@ -1,21 +1,16 @@
 /* eslint-disable react/prefer-stateless-function */
 import {expect} from 'chai';
 
-import Component from '../src/component';
 import Ecs from '../src/ecs';
 import System from '../src/system';
 
-class Empty extends Component {}
+const Empty = {};
 
-class Position extends Component {
-
-  static schema = {
-    x: {type: 'int32', defaultValue: 32},
-    y: 'int32',
-    z: 'int32',
-  };
-
-}
+const Position = {
+  x: {type: 'int32', defaultValue: 32},
+  y: 'int32',
+  z: 'int32',
+};
 
 it('can create entities with components', () => {
   const ecs = new Ecs({Empty, Position});
@@ -25,15 +20,11 @@ it('can create entities with components', () => {
 });
 
 it('can tick systems', () => {
-  class Momentum extends Component {
-
-    static schema = {
-      x: 'int32',
-      y: 'int32',
-      z: 'int32',
-    };
-
-  }
+  const Momentum = {
+    x: 'int32',
+    y: 'int32',
+    z: 'int32',
+  };
   const ecs = new Ecs({Momentum, Position});
   class Physics extends System {