added paperless ui

src-ui/src/app/services/open-documents.service.ts

@@ -0,0 +1,35 @@
+import { Injectable } from '@angular/core';
+import { Observable, Subject } from 'rxjs';
+import { PaperlessDocument } from '../data/paperless-document';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class OpenDocumentsService {
+
+  constructor() { }
+
+  private openDocuments: PaperlessDocument[] = []
+
+  private openDocumentsSubject: Subject<PaperlessDocument[]> = new Subject()
+
+  getOpenDocuments(): Observable<PaperlessDocument[]> {
+    return this.openDocumentsSubject
+  }
+
+  openDocument(doc: PaperlessDocument) {
+    if (this.openDocuments.find(d => d.id == doc.id) == null) {
+      this.openDocuments.push(doc)
+      this.openDocumentsSubject.next(this.openDocuments)
+    }
+  }
+
+  closeDocument(doc: PaperlessDocument) {
+    let index = this.openDocuments.findIndex(d => d.id == doc.id)
+    if (index > -1) {
+      this.openDocuments.splice(index, 1)
+      this.openDocumentsSubject.next(this.openDocuments)
+    }
+  }
+
+}