Refactor event bus and queue system; detect cycles in DI realization and make

src/orm/model/events/ModelEvent.ts

@@ -1,31 +1,19 @@
 import {Model} from '../Model'
-import {Event} from '../../../event/Event'
-import {JSONState} from '../../../util'
+import {BaseEvent} from '../../../support/bus'
+import {Awaitable} from '../../../util'
 
 /**
  * Base class for events that concern an instance of a model.
+ * @fixme support serialization
  */
-export abstract class ModelEvent<T extends Model<T>> extends Event {
-    /**
-     * The instance of the model.
-     */
-    public instance!: T
-
+export abstract class ModelEvent<T extends Model<T>> extends BaseEvent {
     constructor(
-        instance?: T,
+        public readonly instance: T,
     ) {
         super()
-        if ( instance ) {
-            this.instance = instance
-        }
     }
 
-    // TODO implement serialization here
-    dehydrate(): Promise<JSONState> {
-        return Promise.resolve({})
-    }
-
-    rehydrate(/* state: JSONState */): void | Promise<void> {
-        return undefined
+    shouldBroadcast(): Awaitable<boolean> {
+        return false
     }
 }