Feature: Share links (#3996)

* Implement share links

Basic implementation of share links

Make certain share link fields not editable, automatically grant permissions on migrate

Updated styling, error messages from expired / deleted links

frontend code linting, reversable sharelink migration

testing coverage

Update translation strings

No links message

* Consolidate file response methods

* improvements to share links on mobile devices

* Refactor share links file_version

* Add docs for share links

* Apply suggestions from code review

* When filtering share links, use the timezone aware now()

* Removes extra call to setup directories for usage in testing

* FIx copied badge display on some browsers

* Move copy to ngx-clipboard library

---------

Co-authored-by: Trenton H <797416+stumpylog@users.noreply.github.com>

src-ui/src/app/services/rest/share-link.service.spec.ts

@@ -0,0 +1,42 @@
+import { HttpTestingController } from '@angular/common/http/testing'
+import { TestBed } from '@angular/core/testing'
+import { Subscription } from 'rxjs'
+import { environment } from 'src/environments/environment'
+import { commonAbstractPaperlessServiceTests } from './abstract-paperless-service.spec'
+import { ShareLinkService } from './share-link.service'
+
+let httpTestingController: HttpTestingController
+let service: ShareLinkService
+let subscription: Subscription
+const endpoint = 'share_links'
+
+// run common tests
+commonAbstractPaperlessServiceTests(endpoint, ShareLinkService)
+
+describe(`Additional service tests for ShareLinkService`, () => {
+  beforeEach(() => {
+    // Dont need to setup again
+
+    httpTestingController = TestBed.inject(HttpTestingController)
+    service = TestBed.inject(ShareLinkService)
+  })
+
+  afterEach(() => {
+    subscription?.unsubscribe()
+    httpTestingController.verify()
+  })
+
+  it('should support creating link for document', () => {
+    subscription = service.createLinkForDocument(0).subscribe()
+    httpTestingController
+      .expectOne(`${environment.apiBaseUrl}${endpoint}/`)
+      .flush({})
+  })
+
+  it('should support get links for a document', () => {
+    subscription = service.getLinksForDocument(0).subscribe()
+    httpTestingController
+      .expectOne(`${environment.apiBaseUrl}documents/0/${endpoint}/`)
+      .flush({})
+  })
+})