Optimize the project structure and introduce DDD design (#394)

projects/app/src/web/common/utils/eventbus.ts

@@ -0,0 +1,18 @@
+export enum EventNameEnum {
+  guideClick = 'guideClick'
+}
+type EventNameType = `${EventNameEnum}`;
+
+export const eventBus = {
+  list: new Map<EventNameType, Function>(),
+  on: function (name: EventNameType, fn: Function) {
+    this.list.set(name, fn);
+  },
+  emit: function (name: EventNameType, data: Record<string, any> = {}) {
+    const fn = this.list.get(name);
+    fn && fn(data);
+  },
+  off: function (name: EventNameType) {
+    this.list.delete(name);
+  }
+};