feat(archive-value): Download archive files with original filename (D…

…EV-295) (#677)

* feat(archive-value): download file with original filename

* feat(archive): sets the filename

src/app/workspace/resource/representation/archive/archive.component.ts

@@ -1,4 +1,4 @@
-import { HttpClient } from '@angular/common/http';
+import { HttpClient, HttpHeaders } from '@angular/common/http';
 import { Component, Input, OnInit } from '@angular/core';
 import { ErrorHandlerService } from 'src/app/main/error/error-handler.service';
 import { FileRepresentation } from '../file-representation';
@@ -11,13 +11,28 @@ import { FileRepresentation } from '../file-representation';
 export class ArchiveComponent implements OnInit {
 
     @Input() src: FileRepresentation;
+    originalFilename: string;
+    temp: string;
 
     constructor(
         private readonly _http: HttpClient,
         private _errorHandler: ErrorHandlerService
     ) { }
 
-    ngOnInit(): void { }
+    ngOnInit(): void {
+        const requestOptions = {
+            headers: new HttpHeaders({ 'Content-Type': 'application/json' }),
+            withCredentials: true
+        };
+
+        const pathToJson = this.src.fileValue.fileUrl.substring(0, this.src.fileValue.fileUrl.lastIndexOf('/')) + '/knora.json';
+
+        this._http.get(pathToJson, requestOptions).subscribe(
+            res => {
+                this.originalFilename = res['originalFilename'];
+            }
+        );
+    }
 
     // https://stackoverflow.com/questions/66986983/angular-10-download-file-from-firebase-link-without-opening-into-new-tab
     async downloadArchive(url: string) {
@@ -33,7 +48,14 @@ export class ArchiveComponent implements OnInit {
         const url = window.URL.createObjectURL(data);
         const e = document.createElement('a');
         e.href = url;
-        e.download = url.substr(url.lastIndexOf('/') + 1);
+
+        // set filename
+        if (this.originalFilename === undefined) {
+            e.download = url.substr(url.lastIndexOf('/') + 1);
+        } else {
+            e.download = this.originalFilename;
+        }
+
         document.body.appendChild(e);
         e.click();
         document.body.removeChild(e);