Copy jslib into Directory Connector [TI-6] (#262)

jslib/angular/src/components/modal/modal.ref.ts

@@ -0,0 +1,50 @@
+import { Observable, Subject } from "rxjs";
+import { first } from "rxjs/operators";
+
+export class ModalRef {
+  onCreated: Observable<HTMLElement>; // Modal added to the DOM.
+  onClose: Observable<any>; // Initiated close.
+  onClosed: Observable<any>; // Modal was closed (Remove element from DOM)
+  onShow: Observable<void>; // Start showing modal
+  onShown: Observable<void>; // Modal is fully visible
+
+  private readonly _onCreated = new Subject<HTMLElement>();
+  private readonly _onClose = new Subject<any>();
+  private readonly _onClosed = new Subject<any>();
+  private readonly _onShow = new Subject<void>();
+  private readonly _onShown = new Subject<void>();
+  private lastResult: any;
+
+  constructor() {
+    this.onCreated = this._onCreated.asObservable();
+    this.onClose = this._onClose.asObservable();
+    this.onClosed = this._onClosed.asObservable();
+    this.onShow = this._onShow.asObservable();
+    this.onShown = this._onShow.asObservable();
+  }
+
+  show() {
+    this._onShow.next();
+  }
+
+  shown() {
+    this._onShown.next();
+  }
+
+  close(result?: any) {
+    this.lastResult = result;
+    this._onClose.next(result);
+  }
+
+  closed() {
+    this._onClosed.next(this.lastResult);
+  }
+
+  created(el: HTMLElement) {
+    this._onCreated.next(el);
+  }
+
+  onClosedPromise(): Promise<any> {
+    return this.onClosed.pipe(first()).toPromise();
+  }
+}