[ACS-437] Content Version Service (#7312)

* content version service

* remove fdescribe

lib/content-services/src/lib/version-manager/content-version.service.ts

@@ -0,0 +1,49 @@
+/*!
+ * @license
+ * Copyright 2019 Alfresco Software, Ltd.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+import { Injectable } from '@angular/core';
+import { AlfrescoApiService } from '@alfresco/adf-core';
+import { ContentApi } from '@alfresco/js-api';
+import { Observable, of } from 'rxjs';
+
+@Injectable({ providedIn: 'root' })
+export class ContentVersionService {
+    private _contentApi: ContentApi;
+
+    get contentApi(): ContentApi {
+        if (!this._contentApi) {
+            this._contentApi = new ContentApi(this.alfrescoApi.getInstance());
+        }
+        return this._contentApi;
+    }
+
+    constructor(private alfrescoApi: AlfrescoApiService) {}
+
+    /**
+     * Get content URL for the given nodeId and specific version.
+     * @param nodeId The ID of the node
+     * @param versionId The ID of the version
+     * @param attachment Retrieve content as an attachment for download
+     * @returns The URL address pointing to the content.
+     */
+    getVersionContentUrl(nodeId: string, versionId: string, attachment?: boolean): Observable<string> {
+        let nodeDownloadUrl = this.contentApi.getContentUrl(nodeId, attachment);
+        nodeDownloadUrl = nodeDownloadUrl.replace('/content', '/versions/' + versionId + '/content');
+
+        return of(nodeDownloadUrl);
+    }
+}

lib/content-services/src/lib/version-manager/public-api.ts

@@ -19,5 +19,5 @@ export * from './version-list.component';
 export * from './version-manager.component';
 export * from './version-upload.component';
 export * from './version-comparison.component';
-
+export * from './content-version.service';
 export * from './version-manager.module';

lib/content-services/src/lib/version-manager/version-list.component.spec.ts

@@ -25,11 +25,13 @@ import { of } from 'rxjs';
 import { Node, VersionPaging, VersionEntry, NodeEntry } from '@alfresco/js-api';
 import { ContentTestingModule } from '../testing/content.testing.module';
 import { TranslateModule } from '@ngx-translate/core';
+import { ContentVersionService } from './content-version.service';
 
 describe('VersionListComponent', () => {
     let component: VersionListComponent;
     let fixture: ComponentFixture<VersionListComponent>;
     let dialog: MatDialog;
+    let contentVersionService: ContentVersionService;
 
     const nodeId = 'test-id';
     const versionId = '1.0';
@@ -59,6 +61,7 @@ describe('VersionListComponent', () => {
     beforeEach(() => {
         fixture = TestBed.createComponent(VersionListComponent);
         dialog = TestBed.inject(MatDialog);
+        contentVersionService = TestBed.inject(ContentVersionService);
 
         component = fixture.componentInstance;
         component.node = <Node> { id: nodeId, allowableOperations: ['update'] };
@@ -218,12 +221,12 @@ describe('VersionListComponent', () => {
                 }
             };
             spyOn(component['versionsApi'], 'listVersionHistory').and.returnValue(Promise.resolve(new VersionPaging({ list: { entries: [versionEntry] } })));
-            spyOn(component['contentApi'], 'getContentUrl').and.returnValue('the/download/url');
+            spyOn(contentVersionService.contentApi, 'getContentUrl').and.returnValue('the/download/url');
 
             fixture.detectChanges();
 
             component.downloadVersion('1.0');
-            expect(component['contentApi'].getContentUrl).toHaveBeenCalledWith(nodeId, true);
+            expect(contentVersionService.contentApi.getContentUrl).toHaveBeenCalledWith(nodeId, true);
         });
 
         it('should be able to view a version', () => {

lib/content-services/src/lib/version-manager/version-list.component.ts

@@ -20,6 +20,7 @@ import { Component, Input, OnChanges, ViewEncapsulation, EventEmitter, Output }
 import { VersionsApi, Node, VersionEntry, VersionPaging, NodesApi, NodeEntry, ContentApi } from '@alfresco/js-api';
 import { MatDialog } from '@angular/material/dialog';
 import { ConfirmDialogComponent } from '../dialogs/confirm.dialog';
+import { ContentVersionService } from './content-version.service';
 
 @Component({
     selector: 'adf-version-list',
@@ -75,18 +76,19 @@ export class VersionListComponent implements OnChanges {
 
     /** Emitted when a version is restored */
     @Output()
-    restored: EventEmitter<Node> = new EventEmitter<Node>();
+    restored = new EventEmitter<Node>();
 
     /** Emitted when a version is deleted */
     @Output()
-    deleted: EventEmitter<Node> = new EventEmitter<Node>();
+    deleted = new EventEmitter<Node>();
 
     /** Emitted when viewing a version */
     @Output()
-    viewVersion: EventEmitter<string> = new EventEmitter<string>();
+    viewVersion = new EventEmitter<string>();
 
     constructor(private alfrescoApi: AlfrescoApiService,
                 private contentService: ContentService,
+                private contentVersionService: ContentVersionService,
                 private dialog: MatDialog) {
     }
 
@@ -102,7 +104,7 @@ export class VersionListComponent implements OnChanges {
         return this.contentService.hasAllowableOperations(this.node, 'delete') && this.versions.length > 1;
     }
 
-    restore(versionId) {
+    restore(versionId: string) {
         if (this.canUpdate()) {
             this.versionsApi
                 .revertVersion(this.node.id, versionId, { majorVersion: true, comment: '' })
@@ -116,7 +118,7 @@ export class VersionListComponent implements OnChanges {
         }
     }
 
-    onViewVersion(versionId) {
+    onViewVersion(versionId: string) {
         this.viewVersion.emit(versionId);
     }
 
@@ -130,8 +132,9 @@ export class VersionListComponent implements OnChanges {
 
     downloadVersion(versionId: string) {
         if (this.allowDownload) {
-            const versionDownloadUrl = this.getVersionContentUrl(this.node.id, versionId, true);
-            this.downloadContent(versionDownloadUrl);
+            this.contentVersionService
+                .getVersionContentUrl(this.node.id, versionId, true)
+                .subscribe(versionDownloadUrl => this.downloadContent(versionDownloadUrl));
         }
     }
 
@@ -167,11 +170,6 @@ export class VersionListComponent implements OnChanges {
         this.restored.emit(node?.entry);
     }
 
-    private getVersionContentUrl(nodeId: string, versionId: string, attachment?: boolean) {
-        const nodeDownloadUrl = this.contentApi.getContentUrl(nodeId, attachment);
-        return nodeDownloadUrl.replace('/content', '/versions/' + versionId + '/content');
-    }
-
     downloadContent(url: string) {
         if (url) {
             const link = document.createElement('a');