[ACA-3897] Extendable viewer navigation (#2109)

* [ACA-3897] Extendable viewer navigation

* Update app.extensions.json

docs/extending/application-features.md

@@ -569,6 +569,11 @@ export interface ViewerRules {
    * Checks if user can preview the node.
    */
   canPreview?: string;
+
+  /**
+   * Shows navigation options
+   */
+  showNavigation?: string;
 }
 ```
 

extension.schema.json

@@ -780,6 +780,10 @@
                 "canPreview": {
                   "description": "Controls whether preview is enabled for particular node",
                   "type": "string"
+                },
+                "showNavigation": {
+                  "description": "Controls viewer navigation options",
+                  "type": "string"
                 }
               }
             },

projects/aca-shared/src/lib/models/viewer.rules.ts

@@ -28,4 +28,9 @@ export interface ViewerRules {
    * Checks if user can preview the node.
    */
   canPreview?: string;
+
+  /**
+   * Shows navigation options
+   */
+  showNavigation?: string;
 }

projects/aca-shared/src/lib/services/app.extension.service.ts

@@ -497,4 +497,17 @@ export class AppExtensionService implements RuleContext {
 
     return true;
   }
+
+  canShowViewerNavigation(node: NodeEntry) {
+    const rules = this.viewerRules;
+
+    if (this.isRuleDefined(rules.showNavigation)) {
+      const showNavigation = this.evaluateRule(rules.showNavigation, node);
+      if (!showNavigation) {
+        return false;
+      }
+    }
+
+    return true;
+  }
 }

src/app/components/viewer/viewer.component.ts

@@ -214,6 +214,12 @@ export class AppViewerComponent implements OnInit, OnDestroy {
         this.node = await this.contentApi.getNodeInfo(nodeId).toPromise();
         this.canUpdateNode = this.content.canUpdateNode(this.node);
         this.store.dispatch(new SetSelectedNodesAction([{ entry: this.node }]));
+        this.navigateMultiple = this.extensions.canShowViewerNavigation({ entry: this.node });
+        if (!this.navigateMultiple) {
+          this.nodeId = this.node.id;
+          this.fileName = this.node.name + this.node?.properties?.['cm:versionLabel'];
+          return;
+        }
 
         if (this.node && this.node.isFile) {
           const nearest = await this.getNearestNodes(this.node.id, this.node.parentId);