ENhance actor sheet with roll messages

module/applications/hud/system-manager.js

@@ -0,0 +1,46 @@
+import { ActionHandler } from './action-handler.js'
+import { RollHandler as Core } from './roll-handler.js'
+import { MODULE } from './constants.js'
+import { DEFAULTS } from './defaults.js'
+import * as systemSettings from './settings.js'
+
+export let SystemManager = null
+
+Hooks.once('tokenActionHudCoreApiReady', async (coreModule) => {
+  SystemManager = class SystemManager extends coreModule.api.SystemManager {
+
+    /** @override */
+    getActionHandler() {
+      return new ActionHandler()
+    }
+
+    /** @override */
+    getAvailableRollHandlers() {
+      return { core: 'Adventures with Emmy' }
+    }
+
+    /** @override */
+    getRollHandler(rollHandlerId) {
+      switch (rollHandlerId) {
+        case 'core':
+        default:
+          return new Core()
+      }
+    }
+
+    /** @override */
+    async registerDefaults() {
+      return DEFAULTS
+    }
+
+    /** @override */
+    registerSettings(coreUpdate) {
+      systemSettings.register(coreUpdate)
+    }
+
+    /** @override */
+    registerStyles() {
+      return {}
+    }
+  }
+})